chiark / gitweb /
bootchart: merge bootchart
authorAuke Kok <auke-jan.h.kok@intel.com>
Wed, 17 Oct 2012 23:01:12 +0000 (16:01 -0700)
committerKay Sievers <kay@vrfy.org>
Mon, 7 Jan 2013 22:48:43 +0000 (23:48 +0100)
Bootchart is renamed to 'systemd-bootchart' and installed as
/usr/lib/systemd/systemd-bootchart. The configuration file
will reside in /etc/systemd/bootchart.conf.

Makefile.am
configure.ac
man/bootchart.conf.xml [new file with mode: 0644]
man/systemd-bootchart.xml [new file with mode: 0644]
src/bootchart/README [new file with mode: 0644]
src/bootchart/bootchart.c [new file with mode: 0644]
src/bootchart/bootchart.conf [new file with mode: 0644]
src/bootchart/bootchart.h [new file with mode: 0644]
src/bootchart/log.c [new file with mode: 0644]
src/bootchart/svg.c [new file with mode: 0644]

index c1bb5a7..15bc4c6 100644 (file)
@@ -3020,6 +3020,22 @@ EXTRA_DIST += \
        units/systemd-readahead-done.service.in
 
 # ------------------------------------------------------------------------------
+if ENABLE_BOOTCHART
+systemd_bootchart_SOURCES = \
+       src/bootchart/bootchart.c \
+       src/bootchart/bootchart.h \
+       src/bootchart/log.c \
+       src/bootchart/svg.c
+
+MANPAGES += \
+       man/systemd-bootchart.1
+       man/bootchart.conf.5
+
+rootlibexec_PROGRAMS += \
+       systemd-bootchart
+endif
+
+# ------------------------------------------------------------------------------
 if ENABLE_QUOTACHECK
 rootlibexec_PROGRAMS += \
        systemd-quotacheck
index 4a16827..8a39d98 100644 (file)
@@ -558,6 +558,14 @@ fi
 AM_CONDITIONAL(ENABLE_READAHEAD, [test "$have_readahead" = "yes"])
 
 # ------------------------------------------------------------------------------
+have_bootchart=no
+AC_ARG_ENABLE(bootchart, AS_HELP_STRING([--disable-bootchart], [disable bootchart tool]))
+if test "x$enable_bootchart" != "xno"; then
+        have_bootchart=yes
+fi
+AM_CONDITIONAL(ENABLE_BOOTCHART, [test "$have_bootchart" = "yes"])
+
+# ------------------------------------------------------------------------------
 have_quotacheck=no
 AC_ARG_ENABLE(quotacheck, AS_HELP_STRING([--disable-quotacheck], [disable quotacheck tools]))
 if test "x$enable_quotacheck" != "xno"; then
@@ -845,6 +853,7 @@ AC_MSG_RESULT([
         binfmt:                  ${have_binfmt}
         vconsole:                ${have_vconsole}
         readahead:               ${have_readahead}
+        bootchart:               ${have_bootchart}
         quotacheck:              ${have_quotacheck}
         randomseed:              ${have_randomseed}
         logind:                  ${have_logind}
diff --git a/man/bootchart.conf.xml b/man/bootchart.conf.xml
new file mode 100644 (file)
index 0000000..f8fcfe0
--- /dev/null
@@ -0,0 +1,158 @@
+<?xml version='1.0'?> <!--*-nxml-*-->
+<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+  This file is part of systemd.
+
+  Copyright 2012 Intel Corporation
+
+  Authors:
+    Auke Kok <auke-jan.h.kok@intel.com>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="bootchart.conf">
+        <refentryinfo>
+                <title>bootchart.conf</title>
+                <productname>systemd</productname>
+
+                <authorgroup>
+                        <author>
+                                <contrib>Developer</contrib>
+                                <firstname>Auke</firstname>
+                                <surname>Kok</surname>
+                                <email>auke-jan.h.kok@intel.com</email>
+                        </author>
+                </authorgroup>
+        </refentryinfo>
+
+        <refmeta>
+                <refentrytitle>bootchart.conf</refentrytitle>
+                <manvolnum>5</manvolnum>
+        </refmeta>
+
+        <refnamediv>
+                <refname>bootchart.conf</refname>
+                <refpurpose>Boot performance analysis graphing tool configuration file</refpurpose>
+        </refnamediv>
+
+        <refsynopsisdiv>
+                <para><filename>/etc/systemd/bootchart.conf</filename></para>
+        </refsynopsisdiv>
+
+        <refsect1>
+                <title>Description</title>
+
+                <para>When starting, systemd-bootchart will read the
+                configuration file <filename>bootchart.conf</filename>.
+                This configuration file determines logging parameters and
+                graph output.</para>
+
+        </refsect1>
+
+        <refsect1>
+                <title>Options</title>
+
+                <variablelist class='bootchart-directives'>
+
+                        <varlistentry>
+                                <term><varname>samples=500</varname></term>
+                                <listitem><para>Configure the amount of samples to
+                                record total before bootchart exits. Each sample will
+                                record at intervals defined by freq=.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>freq=25</varname></term>
+                                <listitem><para>Configure the sample log frequency.
+                                This can be a fractional number, but must be larger than
+                                0.0. Most systems can cope with values under 25-50 without
+                                impacting boot time severely.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>rel=0</varname></term>
+                                <listitem><para>Configures whether the left axis of the
+                                output graph equals time=0.0 (CLOCK_MONOTONIC start). This
+                                is useful for using bootchart at post-boot time to profile
+                                an already booted system, otherwise the graph would become
+                                extremely large. If set to a non-zero value, the horizontal
+                                axis starts at the first recorded sample instead of time=0.0.
+                                </para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>filter=0</varname></term>
+                                <listitem><para>Configures whether the resulting graph
+                                should omit tasks that did not contribute significantly
+                                to the boot. Processes that are too short-lived (only
+                                seen in one sample) or that do not consume any significant
+                                CPU time (less than 0.001sec) will not be displayed in
+                                the output graph.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>output=[path]</varname></term>
+                                <listitem><para>Configures the output folder for writing
+                                the graphs. By default, bootchart writes the graphs to
+                                <filename>/var/log</filename>.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>init=[path]</varname></term>
+                                <listitem><para>Configures bootchart to run a non-standard
+                                binary instead of <filename>/sbin/init</filename>. This
+                                option is only relevant if bootchart was invoked from the
+                                kernel command line with
+                                init=/usr/lib/systemd/systemd-bootchart.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>pss=0</varname></term>
+                                <listitem><para>If set to 1, enables logging and graphing
+                                of processes PSS memory consumption.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>entropy=0</varname></term>
+                                <listitem><para>If set to 1, enables logging and graphing
+                                of the kernel random entropy pool size.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>scale_x=100</varname></term>
+                                <listitem><para>Horizontal scaling factor for all variable
+                                graph components.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>scale_y=20</varname></term>
+                                <listitem><para>Vertical scaling factor for all variable
+                                graph components.</para></listitem>
+                        </varlistentry>
+
+                </variablelist>
+        </refsect1>
+
+        <refsect1>
+                  <title>See Also</title>
+                  <para>
+                          <citerefentry><refentrytitle>systemd-bootchart</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+                  </para>
+        </refsect1>
+
+</refentry>
diff --git a/man/systemd-bootchart.xml b/man/systemd-bootchart.xml
new file mode 100644 (file)
index 0000000..4d53824
--- /dev/null
@@ -0,0 +1,117 @@
+<?xml version='1.0'?> <!--*-nxml-*-->
+<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+  This file is part of systemd.
+
+  Copyright 2012 Intel Corporation
+
+  Authors:
+    Auke Kok <auke-jan.h.kok@intel.com>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="systemd-bootchart">
+        <refentryinfo>
+                <title>systemd-bootchart</title>
+                <productname>systemd</productname>
+
+                <authorgroup>
+                        <author>
+                                <contrib>Developer</contrib>
+                                <firstname>Auke</firstname>
+                                <surname>Kok</surname>
+                                <email>auke-jan.h.kok@intel.com</email>
+                        </author>
+                </authorgroup>
+        </refentryinfo>
+
+        <refmeta>
+                <refentrytitle>systemd-bootchart</refentrytitle>
+                <manvolnum>1</manvolnum>
+        </refmeta>
+
+        <refnamediv>
+                <refname>systemd-bootchart</refname>
+                <refpurpose>Boot performance analysis graphing tool</refpurpose>
+        </refnamediv>
+
+        <refsect1>
+                <title>Description</title>
+
+                <para>Systemd-bootchart is an boot time analysis tool. It represents
+                various aspects of the system as graph elements. These graph
+                elements allow the user to determine resource usage, efficiency
+                and performance issues.</para>
+
+        </refsect1>
+
+        <refsect1>
+                <title>Invocation</title>
+
+                <para>systemd-bootchart can be invoked in several different ways:</para>
+
+                <variablelist class='bootchart-invocation'>
+
+                        <varlistentry>
+                                <title>Kernel invocation</title>
+                                <listitem><para>The kernel can invoke systemd-bootchart
+                                instead of the init process. In itself, systemd-bootchart
+                                will invoke <filename>/sbin/init</filename> if invoked in
+                                this matter.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <title>Started as a standalone program</title>
+                                <listitem><para>One can execute systemd-bootchart as
+                                normal application from the commandline. In this mode
+                                it is highly recommended to pass the "-r" flag in order
+                                to not graph the time elapsed since boot and before
+                                systemd-bootchart was started, as it may result in
+                                extremely large graphs.
+                                </para></listitem>
+                        </varlistentry>
+                </variablelist>
+        </refsect1>
+
+        <refsect1>
+                <title>Options</title>
+
+                <para>Please read systemd-bootchart --help or the bootchart.conf manual
+                page for information about the various options that influence how
+                systemd-bootchart operates.</para>
+        </refsect1>
+
+        <refsect1>
+                <title>Output</title>
+
+                <para>Systemd-bootchart generates SVG graphs. In order to render these
+                on a graphica display any SVG capable viewer can be used. It should be
+                noted that the SVG render engines in most browsers (including Chrome
+                and Firefox) are many times faster than dedicated graphical applications
+                like Gimp and Inkscape.  Just point your browser at "file:///var/log"!
+                </para>
+        </refsect1>
+
+        <refsect1>
+                  <title>See Also</title>
+                  <para>
+                          <citerefentry><refentrytitle>bootchart.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+                  </para>
+        </refsect1>
+
+</refentry>
diff --git a/src/bootchart/README b/src/bootchart/README
new file mode 100644 (file)
index 0000000..a209caf
--- /dev/null
@@ -0,0 +1,83 @@
+
+Bootchart - a 'startup' graphing tool
+
+--
+
+Bootchart is a tool, usually run at system startup, that collects and graphs
+the CPU and disk load of the system as it works. The output of bootchart is
+an SVG graph. Normally, bootchart is invoked as `bootchartd` by the kernel
+by passing "init=/sbin/bootchartd" to the kernel. Bootchart will then fork
+init off to resume normal system startup, while monitoring and logging
+startup information in the background.
+
+After collecting a certain amount of data (usually 15-30 seconds) the logging
+stops and a graph is generated from the logged information. This graph
+contains vital clues to which resources are being used, in which order, and
+where possible problems exist in the startup sequence of the system.
+
+Of course, bootchart can also be used at any moment in time to collect and
+graph some data for an amount of time. Bootchart does not even require root
+privileges to do so, and will happily run as a normal user. Bootchart graphs
+are by default written time-stamped in /var/log.
+
+--
+
+This version of bootchart was implemented from scratch and inspired by former
+incantations of bootchart:
+
+- The original bash/shell code implemented bootchart. This version logged all
+data into a compressed tarball for later processing, and did not create a graph
+on it's own.
+
+- The C-code implementation found in Ubuntu. This version replaced above shell
+code version with a faster and efficient data logger, but still did not graph
+code itself.
+
+- the original Java-based bootchart, the original graphing program that created
+a bootchart graph from logged data.
+
+- the pybootchartgui.py program, which created a graph based on the data logged
+by either standalone data logger.
+
+The version you are looking at combines these 2 parts into a single program,
+which makes running it and creating graphs a bit more efficient and simple.
+You can now run a single program at startup instead of 2. There are no timing
+problems (the graphing stage will never run if the logging stage didn't
+finish). The logged data isn't being written to disc first, then read again.
+Also, the data kept in memory is reduced to the absolute minimum needed to
+keep memory use low.
+
+--
+
+Requirements: glibc. Your kernel must have procfs support and several
+proc output options enabled:
+  CONFIG_PROC_FS
+  CONFIG_SCHEDSTATS
+  CONFIG_SCHED_DEBUG
+at a minimum. bootchartd itself does not require any graphics library
+to generate the SVG output file.
+
+--
+
+Configuration: please see bootchartd --help, as well as /etc/bootchartd.conf
+and/or /usr/share/doc/bootchart/bootchartd.conf.example for a list of
+configurable options.
+
+--
+
+Many thanks to those who contributed ideas and code:
+ - Ziga Mahkovec - Original bootchart author
+ - Anders Norgaard - PyBootchartgui
+ - Michael Meeks - bootchart2
+ - Scott James Remnant - Ubuntu C-based logger
+ - Arjan van der Ven - for the idea to merge bootgraph.pl functionality
+
+--
+
+For bugs, please contact the author or current maintainer:
+Auke Kok <auke-jan.h.kok@intel.com>
+
+--
+
+Download bootchart releases here: http://foo-projects.org/~sofar/bootchart/
+Source code is hosted here: git://github.com/sofar/bootchart
diff --git a/src/bootchart/bootchart.c b/src/bootchart/bootchart.c
new file mode 100644 (file)
index 0000000..2eeb37a
--- /dev/null
@@ -0,0 +1,352 @@
+/*
+ * bootchart.c
+ *
+ * Copyright (C) 2009-2012 Intel Coproration
+ *
+ * Authors:
+ *   Auke Kok <auke-jan.h.kok@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/resource.h>
+#include <stdio.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+#include <getopt.h>
+#include <limits.h>
+#include <errno.h>
+
+
+#include "bootchart.h"
+
+double graph_start;
+double log_start;
+double sampletime[MAXSAMPLES];
+struct ps_struct *ps_first;
+struct block_stat_struct blockstat[MAXSAMPLES];
+int entropy_avail[MAXSAMPLES];
+struct cpu_stat_struct cpustat[MAXCPUS];
+int pscount;
+int cpus;
+double interval;
+FILE *of;
+int overrun = 0;
+static int exiting = 0;
+
+/* graph defaults */
+int entropy = 0;
+int initcall = 1;
+int relative;
+int filter = 1;
+int pss = 0;
+int samples;
+int len = 500; /* we record len+1 (1 start sample) */
+double hz = 25.0;   /* 20 seconds log time */
+double scale_x = 100.0; /* 100px = 1sec */
+double scale_y = 20.0;  /* 16px = 1 process bar */
+
+char init_path[PATH_MAX] = "/sbin/init";
+char output_path[PATH_MAX] = "/var/log";
+
+static struct rlimit rlim;
+
+static void signal_handler(int sig)
+{
+       if (sig++)
+               sig--;
+       exiting = 1;
+}
+
+
+int main(int argc, char *argv[])
+{
+       struct sigaction sig;
+       struct ps_struct *ps;
+       char output_file[PATH_MAX];
+       char datestr[200];
+       time_t t;
+       FILE *f;
+       int gind;
+       int i;
+
+       memset(&t, 0, sizeof(time_t));
+
+       rlim.rlim_cur = 4096;
+       rlim.rlim_max = 4096;
+       (void) setrlimit(RLIMIT_NOFILE, &rlim);
+
+       f = fopen("/etc/systemd/bootchart.conf", "r");
+       if (f) {
+               char buf[256];
+               char *key;
+               char *val;
+
+               while (fgets(buf, 80, f) != NULL) {
+                       char *c;
+
+                       c = strchr(buf, '\n');
+                       if (c) *c = 0; /* remove trailing \n */
+
+                       if (buf[0] == '#')
+                               continue; /* comment line */
+
+                       key = strtok(buf, "=");
+                       if (!key)
+                               continue;
+                       val = strtok(NULL, "=");
+                       if (!val)
+                               continue;
+
+                       // todo: filter leading/trailing whitespace
+
+                       if (!strcmp(key, "samples"))
+                               len = atoi(val);
+                       if (!strcmp(key, "freq"))
+                               hz = atof(val);
+                       if (!strcmp(key, "rel"))
+                               relative = atoi(val);
+                       if (!strcmp(key, "filter"))
+                               filter = atoi(val);
+                       if (!strcmp(key, "pss"))
+                               pss = atoi(val);
+                       if (!strcmp(key, "output"))
+                               strncpy(output_path, val, PATH_MAX - 1);
+                       if (!strcmp(key, "init"))
+                               strncpy(init_path, val, PATH_MAX - 1);
+                       if (!strcmp(key, "scale_x"))
+                               scale_x = atof(val);
+                       if (!strcmp(key, "scale_y"))
+                               scale_y = atof(val);
+                       if (!strcmp(key, "entropy"))
+                               entropy = atoi(val);
+               }
+               fclose(f);
+       }
+
+       while (1) {
+               static struct option opts[] = {
+                       {"rel", 0, NULL, 'r'},
+                       {"freq", 1, NULL, 'f'},
+                       {"samples", 1, NULL, 'n'},
+                       {"pss", 0, NULL, 'p'},
+                       {"output", 1, NULL, 'o'},
+                       {"init", 1, NULL, 'i'},
+                       {"filter", 0, NULL, 'F'},
+                       {"help", 0, NULL, 'h'},
+                       {"scale-x", 1, NULL, 'x'},
+                       {"scale-y", 1, NULL, 'y'},
+                       {"entropy", 0, NULL, 'e'},
+                       {NULL, 0, NULL, 0}
+               };
+
+               gind = 0;
+
+               i = getopt_long(argc, argv, "erpf:n:o:i:Fhx:y:", opts, &gind);
+               if (i == -1)
+                       break;
+               switch (i) {
+               case 'r':
+                       relative = 1;
+                       break;
+               case 'f':
+                       hz = atof(optarg);
+                       break;
+               case 'F':
+                       filter = 0;
+                       break;
+               case 'n':
+                       len = atoi(optarg);
+                       break;
+               case 'o':
+                       strncpy(output_path, optarg, PATH_MAX - 1);
+                       break;
+               case 'i':
+                       strncpy(init_path, optarg, PATH_MAX - 1);
+                       break;
+               case 'p':
+                       pss = 1;
+                       break;
+               case 'x':
+                       scale_x = atof(optarg);
+                       break;
+               case 'y':
+                       scale_y = atof(optarg);
+                       break;
+               case 'e':
+                       entropy = 1;
+                       break;
+               case 'h':
+                       fprintf(stderr, "Usage: %s [OPTIONS]\n", argv[0]);
+                       fprintf(stderr, " --rel,     -r            Record time relative to recording\n");
+                       fprintf(stderr, " --freq,    -f N          Sample frequency [%f]\n", hz);
+                       fprintf(stderr, " --samples, -n N          Stop sampling at [%d] samples\n", len);
+                       fprintf(stderr, " --scale-x, -x N          Scale the graph horizontally [%f] \n", scale_x);
+                       fprintf(stderr, " --scale-y, -y N          Scale the graph vertically [%f] \n", scale_y);
+                       fprintf(stderr, " --pss,     -p            Enable PSS graph (CPU intensive)\n");
+                       fprintf(stderr, " --entropy, -e            Enable the entropy_avail graph\n");
+                       fprintf(stderr, " --output,  -o [PATH]     Path to output files [%s]\n", output_path);
+                       fprintf(stderr, " --init,    -i [PATH]     Path to init executable [%s]\n", init_path);
+                       fprintf(stderr, " --filter,  -F            Disable filtering of processes from the graph\n");
+                       fprintf(stderr, "                          that are of less importance or short-lived\n");
+                       fprintf(stderr, " --help,    -h            Display this message\n");
+                       fprintf(stderr, "See the installed README and bootchartd.conf.example for more information.\n");
+                       exit (EXIT_SUCCESS);
+                       break;
+               default:
+                       break;
+               }
+       }
+
+       if (len > MAXSAMPLES) {
+               fprintf(stderr, "Error: samples exceeds maximum\n");
+               exit(EXIT_FAILURE);
+       }
+
+       if (hz <= 0.0) {
+               fprintf(stderr, "Error: Frequency needs to be > 0\n");
+               exit(EXIT_FAILURE);
+       }
+
+       /*
+        * If the kernel executed us through init=/sbin/bootchartd, then
+        * fork:
+        * - parent execs executable specified via init_path[] (/sbin/init by default) as pid=1
+        * - child logs data
+        */
+       if (getpid() == 1) {
+               if (fork()) {
+                       /* parent */
+                       execl(init_path, init_path, NULL);
+               }
+       }
+
+       /* start with empty ps LL */
+       ps_first = malloc(sizeof(struct ps_struct));
+       if (!ps_first) {
+               perror("malloc(ps_struct)");
+               exit(EXIT_FAILURE);
+       }
+       memset(ps_first, 0, sizeof(struct ps_struct));
+
+       /* handle TERM/INT nicely */
+       memset(&sig, 0, sizeof(struct sigaction));
+       sig.sa_handler = signal_handler;
+       sigaction(SIGHUP, &sig, NULL);
+
+       interval = (1.0 / hz) * 1000000000.0;
+
+       log_uptime();
+
+       /* main program loop */
+       while (!exiting) {
+               int res;
+               double sample_stop;
+               struct timespec req;
+               time_t newint_s;
+               long newint_ns;
+               double elapsed;
+               double timeleft;
+
+               sampletime[samples] = gettime_ns();
+
+               /* wait for /proc to become available, discarding samples */
+               if (!(graph_start > 0.0))
+                       log_uptime();
+               else
+                       log_sample(samples);
+
+               sample_stop = gettime_ns();
+
+               elapsed = (sample_stop - sampletime[samples]) * 1000000000.0;
+               timeleft = interval - elapsed;
+
+               newint_s = (time_t)(timeleft / 1000000000.0);
+               newint_ns = (long)(timeleft - (newint_s * 1000000000.0));
+
+               /*
+                * check if we have not consumed our entire timeslice. If we
+                * do, don't sleep and take a new sample right away.
+                * we'll lose all the missed samples and overrun our total
+                * time
+                */
+               if ((newint_ns > 0) || (newint_s > 0)) {
+                       req.tv_sec = newint_s;
+                       req.tv_nsec = newint_ns;
+
+                       res = nanosleep(&req, NULL);
+                       if (res) {
+                               if (errno == EINTR) {
+                                       /* caught signal, probably HUP! */
+                                       break;
+                               }
+                               perror("nanosleep()");
+                               exit (EXIT_FAILURE);
+                       }
+               } else {
+                       overrun++;
+                       /* calculate how many samples we lost and scrap them */
+                       len = len + ((int)(newint_ns / interval));
+               }
+
+               samples++;
+
+               if (samples > len)
+                       break;
+
+       }
+
+       /* do some cleanup, close fd's */
+       ps = ps_first;
+       while (ps->next_ps) {
+               ps = ps->next_ps;
+               if (ps->schedstat)
+                       close(ps->schedstat);
+               if (ps->sched)
+                       close(ps->sched);
+               if (ps->smaps)
+                       fclose(ps->smaps);
+       }
+       closedir(proc);
+
+       t = time(NULL);
+       strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
+       snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", output_path, datestr);
+
+       of = fopen(output_file, "w");
+       if (!of) {
+               perror("open output_file");
+               exit (EXIT_FAILURE);
+       }
+
+       svg_do();
+
+       fprintf(stderr, "bootchartd: Wrote %s\n", output_file);
+       fclose(of);
+
+       /* nitpic cleanups */
+       ps = ps_first;
+       while (ps->next_ps) {
+               struct ps_struct *old = ps;
+               ps = ps->next_ps;
+               free(old->sample);
+               free(old);
+       }
+       free(ps->sample);
+       free(ps);
+
+       /* don't complain when overrun once, happens most commonly on 1st sample */
+       if (overrun > 1)
+               fprintf(stderr, "bootchartd: Warning: sample time overrun %i times\n", overrun);
+
+       return 0;
+}
diff --git a/src/bootchart/bootchart.conf b/src/bootchart/bootchart.conf
new file mode 100644 (file)
index 0000000..06c1b47
--- /dev/null
@@ -0,0 +1,20 @@
+
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+# See systemd-bootchart.conf(5) for details
+
+#samples=500
+#freq=25
+#rel=0
+#filter=1
+#output=<folder name, defaults to /var/log>
+#init=/path/to/init-binary
+#pss=0
+#entropy=0
+#scale_x=100
+#scale_y=20
diff --git a/src/bootchart/bootchart.h b/src/bootchart/bootchart.h
new file mode 100644 (file)
index 0000000..0d8bed1
--- /dev/null
@@ -0,0 +1,117 @@
+/*
+ * bootchart.h
+ *
+ * Copyright (C) 2009-2012 Intel Coproration
+ *
+ * Authors:
+ *   Auke Kok <auke-jan.h.kok@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <dirent.h>
+
+#define MAXCPUS        16
+#define MAXPIDS     65535
+#define MAXSAMPLES   8192
+
+
+struct block_stat_struct {
+       /* /proc/vmstat pgpgin & pgpgout */
+       int bi;
+       int bo;
+};
+
+struct cpu_stat_sample_struct {
+       /* /proc/schedstat fields 10 & 11 (after name) */
+       double runtime;
+       double waittime;
+};
+
+struct cpu_stat_struct {
+       /* per cpu array */
+       struct cpu_stat_sample_struct sample[MAXSAMPLES];
+};
+
+/* per process, per sample data we will log */
+struct ps_sched_struct {
+       /* /proc/<n>/schedstat fields 1 & 2 */
+       double runtime;
+       double waittime;
+       int pss;
+};
+
+/* process info */
+struct ps_struct {
+       struct ps_struct *next_ps;    /* SLL pointer */
+       struct ps_struct *parent;     /* ppid ref */
+       struct ps_struct *children;   /* children */
+       struct ps_struct *next;       /* siblings */
+
+       /* must match - otherwise it's a new process with same PID */
+       char name[16];
+       int pid;
+       int ppid;
+
+       /* cache fd's */
+       int sched;
+       int schedstat;
+       FILE *smaps;
+
+       /* index to first/last seen timestamps */
+       int first;
+       int last;
+
+       /* records actual start time, may be way before bootchart runs */
+       double starttime;
+
+       /* record human readable total cpu time */
+       double total;
+
+       /* largest PSS size found */
+       int pss_max;
+
+       /* for drawing connection lines later */
+       double pos_x;
+       double pos_y;
+
+       struct ps_sched_struct *sample;
+};
+
+extern int entropy_avail[];
+
+extern double graph_start;
+extern double log_start;
+extern double sampletime[];
+extern struct ps_struct *ps_first;
+extern struct block_stat_struct blockstat[];
+extern struct cpu_stat_struct cpustat[];
+extern int pscount;
+extern int relative;
+extern int filter;
+extern int pss;
+extern int entropy;
+extern int initcall;
+extern int samples;
+extern int cpus;
+extern int len;
+extern double hz;
+extern double scale_x;
+extern double scale_y;
+extern int overrun;
+extern double interval;
+
+extern char output_path[PATH_MAX];
+extern char init_path[PATH_MAX];
+
+extern FILE *of;
+extern DIR *proc;
+
+extern double gettime_ns(void);
+extern void log_uptime(void);
+extern void log_sample(int sample);
+
+extern void svg_do(void);
diff --git a/src/bootchart/log.c b/src/bootchart/log.c
new file mode 100644 (file)
index 0000000..89c7b35
--- /dev/null
@@ -0,0 +1,420 @@
+/*
+ * log.c
+ *
+ * Copyright (C) 2009-2012 Intel Coproration
+ *
+ * Authors:
+ *   Auke Kok <auke-jan.h.kok@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#define _GNU_SOURCE 1
+#include <unistd.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <string.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <time.h>
+
+
+#include "bootchart.h"
+
+/*
+ * Alloc a static 4k buffer for stdio - primarily used to increase
+ * PSS buffering from the default 1k stdin buffer to reduce
+ * read() overhead.
+ */
+static char smaps_buf[4096];
+DIR *proc;
+
+
+double gettime_ns(void)
+{
+       struct timespec now;
+
+       clock_gettime(CLOCK_MONOTONIC, &now);
+
+       return (now.tv_sec + (now.tv_nsec / 1000000000.0));
+}
+
+
+void log_uptime(void)
+{
+       FILE *f;
+       char str[32];
+       double uptime;
+
+       f = fopen("/proc/uptime", "r");
+       if (!f)
+               return;
+       if (!fscanf(f, "%s %*s", str)) {
+               fclose(f);
+               return;
+       }
+       fclose(f);
+       uptime = strtod(str, NULL);
+
+       log_start = gettime_ns();
+
+       /* start graph at kernel boot time */
+       if (relative)
+               graph_start = log_start;
+       else
+               graph_start = log_start - uptime;
+}
+
+
+static char *bufgetline(char *buf)
+{
+       char *c;
+
+       if (!buf)
+               return NULL;
+
+       c = strchr(buf, '\n');
+       if (c)
+               c++;
+       return c;
+}
+
+
+void log_sample(int sample)
+{
+       static int vmstat;
+       static int schedstat;
+       FILE *st;
+       char buf[4095];
+       char key[256];
+       char val[256];
+       char rt[256];
+       char wt[256];
+       char *m;
+       int c;
+       int p;
+       int mod;
+       static int e_fd;
+       ssize_t s;
+       ssize_t n;
+       struct dirent *ent;
+
+       if (!vmstat) {
+               /* block stuff */
+               vmstat = open("/proc/vmstat", O_RDONLY);
+               if (vmstat == -1) {
+                       perror("open /proc/vmstat");
+                       exit (EXIT_FAILURE);
+               }
+       }
+
+       n = pread(vmstat, buf, sizeof(buf) - 1, 0);
+       if (n <= 0) {
+               close(vmstat);
+               return;
+       }
+       buf[n] = '\0';
+
+       m = buf;
+       while (m) {
+               if (sscanf(m, "%s %s", key, val) < 2)
+                       goto vmstat_next;
+               if (!strcmp(key, "pgpgin"))
+                       blockstat[sample].bi = atoi(val);
+               if (!strcmp(key, "pgpgout")) {
+                       blockstat[sample].bo = atoi(val);
+                       break;
+               }
+vmstat_next:
+               m = bufgetline(m);
+               if (!m)
+                       break;
+       }
+
+       if (!schedstat) {
+               /* overall CPU utilization */
+               schedstat = open("/proc/schedstat", O_RDONLY);
+               if (schedstat == -1) {
+                       perror("open /proc/schedstat");
+                       exit (EXIT_FAILURE);
+               }
+       }
+
+       n = pread(schedstat, buf, sizeof(buf) - 1, 0);
+       if (n <= 0) {
+               close(schedstat);
+               return;
+       }
+       buf[n] = '\0';
+
+       m = buf;
+       while (m) {
+               if (sscanf(m, "%s %*s %*s %*s %*s %*s %*s %s %s", key, rt, wt) < 3)
+                       goto schedstat_next;
+
+               if (strstr(key, "cpu")) {
+                       c = atoi((const char*)(key+3));
+                       if (c > MAXCPUS)
+                               /* Oops, we only have room for MAXCPUS data */
+                               break;
+                       cpustat[c].sample[sample].runtime = atoll(rt);
+                       cpustat[c].sample[sample].waittime = atoll(wt);
+
+                       if (c == cpus)
+                               cpus = c + 1;
+               }
+schedstat_next:
+               m = bufgetline(m);
+               if (!m)
+                       break;
+       }
+
+       if (entropy) {
+               if (!e_fd) {
+                       e_fd = open("/proc/sys/kernel/random/entropy_avail", O_RDONLY);
+               }
+
+               if (e_fd) {
+                       n = pread(e_fd, buf, sizeof(buf) - 1, 0);
+                       if (n > 0)
+                               entropy_avail[sample] = atoi(buf);
+               }
+       }
+
+       /* all the per-process stuff goes here */
+       if (!proc) {
+               /* find all processes */
+               proc = opendir("/proc");
+               if (!proc)
+                       return;
+       } else {
+               rewinddir(proc);
+       }
+
+       while ((ent = readdir(proc)) != NULL) {
+               char filename[PATH_MAX];
+               int pid;
+               struct ps_struct *ps;
+
+               if ((ent->d_name[0] < '0') || (ent->d_name[0] > '9'))
+                       continue;
+
+               pid = atoi(ent->d_name);
+
+               if (pid >= MAXPIDS)
+                       continue;
+
+               ps = ps_first;
+               while (ps->next_ps) {
+                       ps = ps->next_ps;
+                       if (ps->pid == pid)
+                               break;
+               }
+
+               /* end of our LL? then append a new record */
+               if (ps->pid != pid) {
+                       char t[32];
+                       struct ps_struct *parent;
+
+                       ps->next_ps = malloc(sizeof(struct ps_struct));
+                       if (!ps->next_ps) {
+                               perror("malloc(ps_struct)");
+                               exit (EXIT_FAILURE);
+                       }
+                       memset(ps->next_ps, 0, sizeof(struct ps_struct));
+                       ps = ps->next_ps;
+                       ps->pid = pid;
+
+                       ps->sample = malloc(sizeof(struct ps_sched_struct) * (len + 1));
+                       if (!ps->sample) {
+                               perror("malloc(ps_struct)");
+                               exit (EXIT_FAILURE);
+                       }
+                       memset(ps->sample, 0, sizeof(struct ps_sched_struct) * (len + 1));
+
+                       pscount++;
+
+                       /* mark our first sample */
+                       ps->first = sample;
+
+                       /* get name, start time */
+                       if (!ps->sched) {
+                               sprintf(filename, "/proc/%d/sched", pid);
+                               ps->sched = open(filename, O_RDONLY);
+                               if (ps->sched == -1)
+                                       continue;
+                       }
+
+                       s = pread(ps->sched, buf, sizeof(buf) - 1, 0);
+                       if (s <= 0) {
+                               close(ps->sched);
+                               continue;
+                       }
+
+                       if (!sscanf(buf, "%s %*s %*s", key))
+                               continue;
+
+                       strncpy(ps->name, key, 16);
+                       /* discard line 2 */
+                       m = bufgetline(buf);
+                       if (!m)
+                               continue;
+
+                       m = bufgetline(m);
+                       if (!m)
+                               continue;
+
+                       if (!sscanf(m, "%*s %*s %s", t))
+                               continue;
+
+                       ps->starttime = strtod(t, NULL) / 1000.0;
+
+                       /* ppid */
+                       sprintf(filename, "/proc/%d/stat", pid);
+                       st = fopen(filename, "r");
+                       if (!st)
+                               continue;
+                       if (!fscanf(st, "%*s %*s %*s %i", &p)) {
+                               fclose(st);
+                               continue;
+                       }
+                       fclose(st);
+                       ps->ppid = p;
+
+                       /*
+                        * setup child pointers
+                        *
+                        * these are used to paint the tree coherently later
+                        * each parent has a LL of children, and a LL of siblings
+                        */
+                       if (pid == 1)
+                               continue; /* nothing to do for init atm */
+
+                       /* kthreadd has ppid=0, which breaks our tree ordering */
+                       if (ps->ppid == 0)
+                               ps->ppid = 1;
+
+                       parent = ps_first;
+                       while ((parent->next_ps && parent->pid != ps->ppid))
+                               parent = parent->next_ps;
+
+                       if ((!parent) || (parent->pid != ps->ppid)) {
+                               /* orphan */
+                               ps->ppid = 1;
+                               parent = ps_first->next_ps;
+                       }
+
+                       ps->parent = parent;
+
+                       if (!parent->children) {
+                               /* it's the first child */
+                               parent->children = ps;
+                       } else {
+                               /* walk all children and append */
+                               struct ps_struct *children;
+                               children = parent->children;
+                               while (children->next)
+                                       children = children->next;
+                               children->next = ps;
+                       }
+               }
+
+               /* else -> found pid, append data in ps */
+
+               /* below here is all continuous logging parts - we get here on every
+                * iteration */
+
+               /* rt, wt */
+               if (!ps->schedstat) {
+                       sprintf(filename, "/proc/%d/schedstat", pid);
+                       ps->schedstat = open(filename, O_RDONLY);
+                       if (ps->schedstat == -1)
+                               continue;
+               }
+
+               if (pread(ps->schedstat, buf, sizeof(buf) - 1, 0) <= 0) {
+                       /* clean up our file descriptors - assume that the process exited */
+                       close(ps->schedstat);
+                       if (ps->sched)
+                               close(ps->sched);
+                       //if (ps->smaps)
+                       //      fclose(ps->smaps);
+                       continue;
+               }
+               if (!sscanf(buf, "%s %s %*s", rt, wt))
+                       continue;
+
+               ps->last = sample;
+               ps->sample[sample].runtime = atoll(rt);
+               ps->sample[sample].waittime = atoll(wt);
+
+               ps->total = (ps->sample[ps->last].runtime
+                                - ps->sample[ps->first].runtime)
+                                / 1000000000.0;
+
+               if (!pss)
+                       goto catch_rename;
+               /* Pss */
+               if (!ps->smaps) {
+                       sprintf(filename, "/proc/%d/smaps", pid);
+                       ps->smaps = fopen(filename, "r");
+                       setvbuf(ps->smaps, smaps_buf, _IOFBF, sizeof(smaps_buf));
+                       if (!ps->smaps)
+                               continue;
+               } else {
+                       rewind(ps->smaps);
+               }
+
+               while (1) {
+                       int pss_kb;
+
+                       /* skip one line, this contains the object mapped */
+                       if (fgets(buf, sizeof(buf), ps->smaps) == NULL)
+                               break;
+                       /* then there's a 28 char 14 line block */
+                       if (fread(buf, 1, 28 * 14, ps->smaps) != 28 * 14)
+                               break;
+
+                       pss_kb = atoi(&buf[61]);
+                       ps->sample[sample].pss += pss_kb;
+               }
+
+               if (ps->sample[sample].pss > ps->pss_max)
+                       ps->pss_max = ps->sample[sample].pss;
+
+catch_rename:
+               /* catch process rename, try to randomize time */
+               mod = (hz < 4.0) ? 4.0 : (hz / 4.0);
+               if (((samples - ps->first) + pid) % (int)(mod) == 0) {
+
+                       /* re-fetch name */
+                       /* get name, start time */
+                       if (!ps->sched) {
+                               sprintf(filename, "/proc/%d/sched", pid);
+                               ps->sched = open(filename, O_RDONLY);
+                               if (ps->sched == -1)
+                                       continue;
+                       }
+                       if (pread(ps->sched, buf, sizeof(buf) - 1, 0) <= 0) {
+                               /* clean up file descriptors */
+                               close(ps->sched);
+                               if (ps->schedstat)
+                                       close(ps->schedstat);
+                               //if (ps->smaps)
+                               //      fclose(ps->smaps);
+                               continue;
+                       }
+
+                       if (!sscanf(buf, "%s %*s %*s", key))
+                               continue;
+
+                       strncpy(ps->name, key, 16);
+               }
+       }
+}
diff --git a/src/bootchart/svg.c b/src/bootchart/svg.c
new file mode 100644 (file)
index 0000000..68ec539
--- /dev/null
@@ -0,0 +1,1120 @@
+/*
+ * svg.c
+ *
+ * Copyright (C) 2009-2012 Intel Coproration
+ *
+ * Authors:
+ *   Auke Kok <auke-jan.h.kok@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <limits.h>
+#include <unistd.h>
+#include <sys/utsname.h>
+
+#include "bootchart.h"
+
+
+#define time_to_graph(t) ((t) * scale_x)
+#define ps_to_graph(n) ((n) * scale_y)
+#define kb_to_graph(m) ((m) * scale_y * 0.0001)
+#define to_color(n) (192.0 - ((n) * 192.0))
+
+#define max(x, y) (((x) > (y)) ? (x) : (y))
+#define min(x, y) (((x) < (y)) ? (x) : (y))
+
+static char str[8092];
+
+#define svg(a...) do { snprintf(str, 8092, ## a); fputs(str, of); fflush(of); } while (0)
+
+static const char *colorwheel[12] = {
+       "rgb(255,32,32)",  // red
+       "rgb(32,192,192)", // cyan
+       "rgb(255,128,32)", // orange
+       "rgb(128,32,192)", // blue-violet
+       "rgb(255,255,32)", // yellow
+       "rgb(192,32,128)", // red-violet
+       "rgb(32,255,32)",  // green
+       "rgb(255,64,32)",  // red-orange
+       "rgb(32,32,255)",  // blue
+       "rgb(255,192,32)", // yellow-orange
+       "rgb(192,32,192)", // violet
+       "rgb(32,192,32)"   // yellow-green
+};
+
+static double idletime = -1.0;
+static int pfiltered = 0;
+static int pcount = 0;
+static int kcount = 0;
+static float psize = 0;
+static float ksize = 0;
+static float esize = 0;
+
+
+static void svg_header(void)
+{
+       float w;
+       float h;
+
+       /* min width is about 1600px due to the label */
+       w = 150.0 + 10.0 + time_to_graph(sampletime[samples-1] - graph_start);
+       w = ((w < 1600.0) ? 1600.0 : w);
+
+       /* height is variable based on pss, psize, ksize */
+       h = 400.0 + (scale_y * 30.0) /* base graphs and title */
+           + (pss ? (100.0 * scale_y) + (scale_y * 7.0) : 0.0) /* pss estimate */
+           + psize + ksize + esize;
+
+       svg("<?xml version=\"1.0\" standalone=\"no\"?>\n");
+       svg("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" ");
+       svg("\"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n");
+
+       //svg("<g transform=\"translate(10,%d)\">\n", 1000 + 150 + (pcount * 20));
+       svg("<svg width=\"%.0fpx\" height=\"%.0fpx\" version=\"1.1\" ",
+           w, h);
+       svg("xmlns=\"http://www.w3.org/2000/svg\">\n\n");
+
+       /* write some basic info as a comment, including some help */
+       svg("<!-- This file is a bootchart SVG file. It is best rendered in a browser -->\n");
+       svg("<!-- such as Chrome/Chromium, firefox. Other applications that render    -->\n");
+       svg("<!-- these files properly but much more slow are ImageMagick, gimp,      -->\n");
+       svg("<!-- inkscape, etc.. To display the files on your system, just point     -->\n");
+       svg("<!-- your browser to file:///var/log/ and click. This bootchart was      -->\n\n");
+
+       svg("<!-- generated by bootchart version %s, running with options:  -->\n", VERSION);
+       svg("<!-- hz=\"%f\" n=\"%d\" -->\n", hz, len);
+       svg("<!-- x=\"%f\" y=\"%f\" -->\n", scale_x, scale_y);
+       svg("<!-- rel=\"%d\" f=\"%d\" -->\n", relative, filter);
+       svg("<!-- p=\"%d\" e=\"%d\" -->\n", pss, entropy);
+       svg("<!-- o=\"%s\" i=\"%s\" -->\n\n", output_path, init_path);
+
+       /* style sheet */
+       svg("<defs>\n  <style type=\"text/css\">\n    <![CDATA[\n");
+
+       svg("      rect       { stroke-width: 1; }\n");
+       svg("      rect.cpu   { fill: rgb(64,64,240); stroke-width: 0; fill-opacity: 0.7; }\n");
+       svg("      rect.wait  { fill: rgb(240,240,0); stroke-width: 0; fill-opacity: 0.7; }\n");
+       svg("      rect.bi    { fill: rgb(240,128,128); stroke-width: 0; fill-opacity: 0.7; }\n");
+       svg("      rect.bo    { fill: rgb(192,64,64); stroke-width: 0; fill-opacity: 0.7; }\n");
+       svg("      rect.ps    { fill: rgb(192,192,192); stroke: rgb(128,128,128); fill-opacity: 0.7; }\n");
+       svg("      rect.krnl  { fill: rgb(240,240,0); stroke: rgb(128,128,128); fill-opacity: 0.7; }\n");
+       svg("      rect.box   { fill: rgb(240,240,240); stroke: rgb(192,192,192); }\n");
+       svg("      rect.clrw  { stroke-width: 0; fill-opacity: 0.7;}\n");
+       svg("      line       { stroke: rgb(64,64,64); stroke-width: 1; }\n");
+       svg("//    line.sec1  { }\n");
+       svg("      line.sec5  { stroke-width: 2; }\n");
+       svg("      line.sec01 { stroke: rgb(224,224,224); stroke-width: 1; }\n");
+       svg("      line.dot   { stroke-dasharray: 2 4; }\n");
+       svg("      line.idle  { stroke: rgb(64,64,64); stroke-dasharray: 10 6; stroke-opacity: 0.7; }\n");
+
+       svg("      .run       { font-size: 8; font-style: italic; }\n");
+       svg("      text       { font-family: Verdana, Helvetica; font-size: 10; }\n");
+       svg("      text.sec   { font-size: 8; }\n");
+       svg("      text.t1    { font-size: 24; }\n");
+       svg("      text.t2    { font-size: 12; }\n");
+       svg("      text.idle  { font-size: 18; }\n");
+
+       svg("    ]]>\n   </style>\n</defs>\n\n");
+
+}
+
+
+static void svg_title(void)
+{
+       char cmdline[256] = "";
+       char filename[PATH_MAX];
+       char buf[256];
+       char rootbdev[16] = "Unknown";
+       char model[256] = "Unknown";
+       char date[256] = "Unknown";
+       char cpu[256] = "Unknown";
+       char build[256] = "Unknown";
+       char *c;
+       FILE *f;
+       time_t t;
+       struct utsname uts;
+
+       /* grab /proc/cmdline */
+       f = fopen("/proc/cmdline", "r");
+       if (f) {
+               if (!fgets(cmdline, 255, f))
+                       sprintf(cmdline, "Unknown");
+               fclose(f);
+       }
+
+       /* extract root fs so we can find disk model name in sysfs */
+       c = strstr(cmdline, "root=/dev/");
+       if (c) {
+               strncpy(rootbdev, &c[10], 3);
+               rootbdev[3] = '\0';
+       }
+       sprintf(filename, "/sys/block/%s/device/model", rootbdev);
+       f = fopen(filename, "r");
+       if (f) {
+               if (!fgets(model, 255, f))
+                       fprintf(stderr, "Error reading disk model for %s\n", rootbdev);
+               fclose(f);
+       }
+
+       /* various utsname parameters */
+       if (uname(&uts))
+               fprintf(stderr, "Error getting uname info\n");
+
+       /* date */
+       t = time(NULL);
+       strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %z", localtime(&t));
+
+       /* CPU type */
+       f = fopen("/proc/cpuinfo", "r");
+       if (f) {
+               while (fgets(buf, 255, f)) {
+                       if (strstr(buf, "model name")) {
+                               strncpy(cpu, &buf[13], 255);
+                               break;
+                       }
+               }
+               fclose(f);
+       }
+
+       /* Build - 1st line from /etc/system-release */
+       f = fopen("/etc/system-release", "r");
+       if (f) {
+               if (fgets(buf, 255, f))
+                       strncpy(build, buf, 255);
+               fclose(f);
+       }
+
+       svg("<text class=\"t1\" x=\"0\" y=\"30\">Bootchart for %s - %s</text>\n",
+           uts.nodename, date);
+       svg("<text class=\"t2\" x=\"20\" y=\"50\">System: %s %s %s %s</text>\n",
+           uts.sysname, uts.release, uts.version, uts.machine);
+       svg("<text class=\"t2\" x=\"20\" y=\"65\">CPU: %s</text>\n",
+           cpu);
+       svg("<text class=\"t2\" x=\"20\" y=\"80\">Disk: %s</text>\n",
+           model);
+       svg("<text class=\"t2\" x=\"20\" y=\"95\">Boot options: %s</text>\n",
+           cmdline);
+       svg("<text class=\"t2\" x=\"20\" y=\"110\">Build: %s</text>\n",
+           build);
+       svg("<text class=\"t2\" x=\"20\" y=\"125\">Log start time: %.03fs</text>\n", log_start);
+       svg("<text class=\"t2\" x=\"20\" y=\"140\">Idle time: ");
+
+       if (idletime >= 0.0)
+               svg("%.03fs", idletime);
+       else
+               svg("Not detected");
+       svg("</text>\n");
+       svg("<text class=\"sec\" x=\"20\" y=\"155\">Graph data: %.03f samples/sec, recorded %i total, dropped %i samples, %i processes, %i filtered</text>\n",
+           hz, len, overrun, pscount, pfiltered);
+}
+
+
+static void svg_graph_box(int height)
+{
+       double d = 0.0;
+       int i = 0;
+
+       /* outside box, fill */
+       svg("<rect class=\"box\" x=\"%.03f\" y=\"0\" width=\"%.03f\" height=\"%.03f\" />\n",
+           time_to_graph(0.0),
+           time_to_graph(sampletime[samples-1] - graph_start),
+           ps_to_graph(height));
+
+       for (d = graph_start; d <= sampletime[samples-1];
+            d += (scale_x < 2.0 ? 60.0 : scale_x < 10.0 ? 1.0 : 0.1)) {
+               /* lines for each second */
+               if (i % 50 == 0)
+                       svg("  <line class=\"sec5\" x1=\"%.03f\" y1=\"0\" x2=\"%.03f\" y2=\"%.03f\" />\n",
+                           time_to_graph(d - graph_start),
+                           time_to_graph(d - graph_start),
+                           ps_to_graph(height));
+               else if (i % 10 == 0)
+                       svg("  <line class=\"sec1\" x1=\"%.03f\" y1=\"0\" x2=\"%.03f\" y2=\"%.03f\" />\n",
+                           time_to_graph(d - graph_start),
+                           time_to_graph(d - graph_start),
+                           ps_to_graph(height));
+               else
+                       svg("  <line class=\"sec01\" x1=\"%.03f\" y1=\"0\" x2=\"%.03f\" y2=\"%.03f\" />\n",
+                           time_to_graph(d - graph_start),
+                           time_to_graph(d - graph_start),
+                           ps_to_graph(height));
+
+               /* time label */
+               if (i % 10 == 0)
+                       svg("  <text class=\"sec\" x=\"%.03f\" y=\"%.03f\" >%.01fs</text>\n",
+                           time_to_graph(d - graph_start),
+                           -5.0,
+                           d - graph_start);
+
+               i++;
+       }
+}
+
+
+static void svg_pss_graph(void)
+{
+       struct ps_struct *ps;
+       int i;
+
+       svg("\n\n<!-- Pss memory size graph -->\n");
+
+       svg("\n  <text class=\"t2\" x=\"5\" y=\"-15\">Memory allocation - Pss</text>\n");
+
+       /* vsize 1000 == 1000mb */
+       svg_graph_box(100);
+       /* draw some hlines for usable memory sizes */
+       for (i = 100000; i < 1000000; i += 100000) {
+               svg("  <line class=\"sec01\" x1=\"%.03f\" y1=\"%.0f\" x2=\"%.03f\" y2=\"%.0f\"/>\n",
+                       time_to_graph(.0),
+                       kb_to_graph(i),
+                       time_to_graph(sampletime[samples-1] - graph_start),
+                       kb_to_graph(i));
+               svg("  <text class=\"sec\" x=\"%.03f\" y=\"%.0f\">%dM</text>\n",
+                   time_to_graph(sampletime[samples-1] - graph_start) + 5,
+                   kb_to_graph(i), (1000000 - i) / 1000);
+       }
+       svg("\n");
+
+       /* now plot the graph itself */
+       for (i = 1; i < samples ; i++) {
+               int bottom;
+               int top;
+
+               bottom = 0;
+               top = 0;
+
+               /* put all the small pss blocks into the bottom */
+               ps = ps_first;
+               while (ps->next_ps) {
+                       ps = ps->next_ps;
+                       if (!ps)
+                               continue;
+                       if (ps->sample[i].pss <= (100 * scale_y))
+                               top += ps->sample[i].pss;
+               };
+               svg("    <rect class=\"clrw\" style=\"fill: %s\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                   "rgb(64,64,64)",
+                   time_to_graph(sampletime[i - 1] - graph_start),
+                   kb_to_graph(1000000.0 - top),
+                   time_to_graph(sampletime[i] - sampletime[i - 1]),
+                   kb_to_graph(top - bottom));
+
+               bottom = top;
+
+               /* now plot the ones that are of significant size */
+               ps = ps_first;
+               while (ps->next_ps) {
+                       ps = ps->next_ps;
+                       if (!ps)
+                               continue;
+                       /* don't draw anything smaller than 2mb */
+                       if (ps->sample[i].pss > (100 * scale_y)) {
+                               top = bottom + ps->sample[i].pss;
+                               svg("    <rect class=\"clrw\" style=\"fill: %s\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                                   colorwheel[ps->pid % 12],
+                                   time_to_graph(sampletime[i - 1] - graph_start),
+                                   kb_to_graph(1000000.0 - top),
+                                   time_to_graph(sampletime[i] - sampletime[i - 1]),
+                                   kb_to_graph(top - bottom));
+                               bottom = top;
+                       }
+               }
+       }
+
+       /* overlay all the text labels */
+       for (i = 1; i < samples ; i++) {
+               int bottom;
+               int top;
+
+               bottom = 0;
+               top = 0;
+
+               /* put all the small pss blocks into the bottom */
+               ps = ps_first;
+               while (ps->next_ps) {
+                       ps = ps->next_ps;
+                       if (!ps)
+                               continue;
+                       if (ps->sample[i].pss <= (100 * scale_y))
+                               top += ps->sample[i].pss;
+               };
+
+               bottom = top;
+
+               /* now plot the ones that are of significant size */
+               ps = ps_first;
+               while (ps->next_ps) {
+                       ps = ps->next_ps;
+                       if (!ps)
+                               continue;
+                       /* don't draw anything smaller than 2mb */
+                       if (ps->sample[i].pss > (100 * scale_y)) {
+                               top = bottom + ps->sample[i].pss;
+                               /* draw a label with the process / PID */
+                               if ((i == 1) || (ps->sample[i - 1].pss <= (100 * scale_y)))
+                                       svg("  <text x=\"%.03f\" y=\"%.03f\">%s [%i]</text>\n",
+                                           time_to_graph(sampletime[i] - graph_start),
+                                           kb_to_graph(1000000.0 - bottom - ((top -  bottom) / 2)),
+                                           ps->name,
+                                           ps->pid);
+                               bottom = top;
+                       }
+               }
+       }
+
+       /* debug output - full data dump */
+       svg("\n\n<!-- PSS map - csv format -->\n");
+       ps = ps_first;
+       while (ps->next_ps) {
+               ps = ps->next_ps;
+               if (!ps)
+                       continue;
+               svg("<!-- %s [%d] pss=", ps->name, ps->pid);
+               for (i = 0; i < samples ; i++) {
+                       svg("%d," , ps->sample[i].pss);
+               }
+               svg(" -->\n");
+       }
+
+}
+
+static void svg_io_bi_bar(void)
+{
+       double max = 0.0;
+       double range;
+       int max_here = 0;
+       int i;
+
+       svg("<!-- IO utilization graph - In -->\n");
+
+       svg("<text class=\"t2\" x=\"5\" y=\"-15\">IO utilization - read</text>\n");
+
+       /*
+        * calculate rounding range
+        *
+        * We need to round IO data since IO block data is not updated on
+        * each poll. Applying a smoothing function loses some burst data,
+        * so keep the smoothing range short.
+        */
+       range = 0.25 / (1.0 / hz);
+       if (range < 2.0)
+               range = 2.0; /* no smoothing */
+
+       /* surrounding box */
+       svg_graph_box(5);
+
+       /* find the max IO first */
+       for (i = 1; i < samples; i++) {
+               int start;
+               int stop;
+               double tot;
+
+               start = max(i - ((range / 2) - 1), 0);
+               stop = min(i + (range / 2), samples - 1);
+
+               tot = (double)(blockstat[stop].bi - blockstat[start].bi)
+                     / (stop - start);
+               if (tot > max) {
+                       max = tot;
+                       max_here = i;
+               }
+               tot = (double)(blockstat[stop].bo - blockstat[start].bo)
+                     / (stop - start);
+               if (tot > max)
+                       max = tot;
+       }
+
+       /* plot bi */
+       for (i = 1; i < samples; i++) {
+               int start;
+               int stop;
+               double tot;
+               double pbi;
+
+               start = max(i - ((range / 2) - 1), 0);
+               stop = min(i + (range / 2), samples);
+
+               tot = (double)(blockstat[stop].bi - blockstat[start].bi)
+                     / (stop - start);
+               pbi = tot / max;
+
+               if (pbi > 0.001)
+                       svg("<rect class=\"bi\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                           time_to_graph(sampletime[i - 1] - graph_start),
+                           (scale_y * 5) - (pbi * (scale_y * 5)),
+                           time_to_graph(sampletime[i] - sampletime[i - 1]),
+                           pbi * (scale_y * 5));
+
+               /* labels around highest value */
+               if (i == max_here) {
+                       svg("  <text class=\"sec\" x=\"%.03f\" y=\"%.03f\">%0.2fmb/sec</text>\n",
+                           time_to_graph(sampletime[i] - graph_start) + 5,
+                           ((scale_y * 5) - (pbi * (scale_y * 5))) + 15,
+                           max / 1024.0 / (interval / 1000000000.0));
+               }
+       }
+}
+
+static void svg_io_bo_bar(void)
+{
+       double max = 0.0;
+       double range;
+       int max_here = 0;
+       int i;
+
+       svg("<!-- IO utilization graph - out -->\n");
+
+       svg("<text class=\"t2\" x=\"5\" y=\"-15\">IO utilization - write</text>\n");
+
+       /*
+        * calculate rounding range
+        *
+        * We need to round IO data since IO block data is not updated on
+        * each poll. Applying a smoothing function loses some burst data,
+        * so keep the smoothing range short.
+        */
+       range = 0.25 / (1.0 / hz);
+       if (range < 2.0)
+               range = 2.0; /* no smoothing */
+
+       /* surrounding box */
+       svg_graph_box(5);
+
+       /* find the max IO first */
+       for (i = 1; i < samples; i++) {
+               int start;
+               int stop;
+               double tot;
+
+               start = max(i - ((range / 2) - 1), 0);
+               stop = min(i + (range / 2), samples - 1);
+
+               tot = (double)(blockstat[stop].bi - blockstat[start].bi)
+                     / (stop - start);
+               if (tot > max)
+                       max = tot;
+               tot = (double)(blockstat[stop].bo - blockstat[start].bo)
+                     / (stop - start);
+               if (tot > max) {
+                       max = tot;
+                       max_here = i;
+               }
+       }
+
+       /* plot bo */
+       for (i = 1; i < samples; i++) {
+               int start;
+               int stop;
+               double tot;
+               double pbo;
+
+               start = max(i - ((range / 2) - 1), 0);
+               stop = min(i + (range / 2), samples);
+
+               tot = (double)(blockstat[stop].bo - blockstat[start].bo)
+                     / (stop - start);
+               pbo = tot / max;
+
+               if (pbo > 0.001)
+                       svg("<rect class=\"bo\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                           time_to_graph(sampletime[i - 1] - graph_start),
+                           (scale_y * 5) - (pbo * (scale_y * 5)),
+                           time_to_graph(sampletime[i] - sampletime[i - 1]),
+                           pbo * (scale_y * 5));
+
+               /* labels around highest bo value */
+               if (i == max_here) {
+                       svg("  <text class=\"sec\" x=\"%.03f\" y=\"%.03f\">%0.2fmb/sec</text>\n",
+                           time_to_graph(sampletime[i] - graph_start) + 5,
+                           ((scale_y * 5) - (pbo * (scale_y * 5))),
+                           max / 1024.0 / (interval / 1000000000.0));
+               }
+       }
+}
+
+
+static void svg_cpu_bar(void)
+{
+       int i;
+
+       svg("<!-- CPU utilization graph -->\n");
+
+       svg("<text class=\"t2\" x=\"5\" y=\"-15\">CPU utilization</text>\n");
+       /* surrounding box */
+       svg_graph_box(5);
+
+       /* bars for each sample, proportional to the CPU util. */
+       for (i = 1; i < samples; i++) {
+               int c;
+               double trt;
+               double ptrt;
+
+               ptrt = trt = 0.0;
+
+               for (c = 0; c < cpus; c++)
+                       trt += cpustat[c].sample[i].runtime - cpustat[c].sample[i - 1].runtime;
+
+               trt = trt / 1000000000.0;
+
+               trt = trt / (double)cpus;
+
+               if (trt > 0.0)
+                       ptrt = trt / (sampletime[i] - sampletime[i - 1]);
+
+               if (ptrt > 1.0)
+                       ptrt = 1.0;
+
+               if (ptrt > 0.001) {
+                       svg("<rect class=\"cpu\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                           time_to_graph(sampletime[i - 1] - graph_start),
+                           (scale_y * 5) - (ptrt * (scale_y * 5)),
+                           time_to_graph(sampletime[i] - sampletime[i - 1]),
+                           ptrt * (scale_y * 5));
+               }
+       }
+}
+
+static void svg_wait_bar(void)
+{
+       int i;
+
+       svg("<!-- Wait time aggregation box -->\n");
+
+       svg("<text class=\"t2\" x=\"5\" y=\"-15\">CPU wait</text>\n");
+
+       /* surrounding box */
+       svg_graph_box(5);
+
+       /* bars for each sample, proportional to the CPU util. */
+       for (i = 1; i < samples; i++) {
+               int c;
+               double twt;
+               double ptwt;
+
+               ptwt = twt = 0.0;
+
+               for (c = 0; c < cpus; c++)
+                       twt += cpustat[c].sample[i].waittime - cpustat[c].sample[i - 1].waittime;
+
+               twt = twt / 1000000000.0;
+
+               twt = twt / (double)cpus;
+
+               if (twt > 0.0)
+                       ptwt = twt / (sampletime[i] - sampletime[i - 1]);
+
+               if (ptwt > 1.0)
+                       ptwt = 1.0;
+
+               if (ptwt > 0.001) {
+                       svg("<rect class=\"wait\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                           time_to_graph(sampletime[i - 1] - graph_start),
+                           ((scale_y * 5) - (ptwt * (scale_y * 5))),
+                           time_to_graph(sampletime[i] - sampletime[i - 1]),
+                           ptwt * (scale_y * 5));
+               }
+       }
+}
+
+
+static void svg_entropy_bar(void)
+{
+       int i;
+
+       svg("<!-- entropy pool graph -->\n");
+
+       svg("<text class=\"t2\" x=\"5\" y=\"-15\">Entropy pool size</text>\n");
+       /* surrounding box */
+       svg_graph_box(5);
+
+       /* bars for each sample, scale 0-4096 */
+       for (i = 1; i < samples; i++) {
+               /* svg("<!-- entropy %.03f %i -->\n", sampletime[i], entropy_avail[i]); */
+               svg("<rect class=\"cpu\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                   time_to_graph(sampletime[i - 1] - graph_start),
+                   ((scale_y * 5) - ((entropy_avail[i] / 4096.) * (scale_y * 5))),
+                   time_to_graph(sampletime[i] - sampletime[i - 1]),
+                   (entropy_avail[i] / 4096.) * (scale_y * 5));
+       }
+}
+
+
+static struct ps_struct *get_next_ps(struct ps_struct *ps)
+{
+       /*
+        * walk the list of processes and return the next one to be
+        * painted
+        */
+       if (ps == ps_first)
+               return ps->next_ps;
+
+       /* go deep */
+       if (ps->children)
+               return ps->children;
+
+       /* find siblings */
+       if (ps->next)
+               return ps->next;
+
+       /* go back for parent siblings */
+       while (1) {
+               if (ps->parent)
+                       if (ps->parent->next)
+                               return ps->parent->next;
+               ps = ps->parent;
+               if (!ps)
+                       return ps;
+       }
+
+       return NULL;
+}
+
+
+static int ps_filter(struct ps_struct *ps)
+{
+       if (!filter)
+               return 0;
+
+       /* can't draw data when there is only 1 sample (need start + stop) */
+       if (ps->first == ps->last)
+               return -1;
+
+       /* don't filter kthreadd */
+       if (ps->pid == 2)
+               return 0;
+
+       /* drop stuff that doesn't use any real CPU time */
+       if (ps->total <= 0.001)
+               return -1;
+
+       return 0;
+}
+
+
+static void svg_do_initcall(int count_only)
+{
+       FILE *f;
+       double t;
+       char func[256];
+       int ret;
+       int usecs;
+
+       /* can't plot initcall when disabled or in relative mode */
+       if (!initcall || relative) {
+               kcount = 0;
+               return;
+       }
+
+       if (!count_only) {
+               svg("<!-- initcall -->\n");
+
+               svg("<text class=\"t2\" x=\"5\" y=\"-15\">Kernel init threads</text>\n");
+               /* surrounding box */
+               svg_graph_box(kcount);
+       }
+
+       kcount = 0;
+
+       /*
+        * Initcall graphing - parses dmesg buffer and displays kernel threads
+        * This somewhat uses the same methods and scaling to show processes
+        * but looks a lot simpler. It's overlaid entirely onto the PS graph
+        * when appropriate.
+        */
+
+       f = popen("dmesg", "r");
+       if (!f)
+               return;
+
+       while (!feof(f)) {
+               int c;
+               int z = 0;
+               char l[256];
+
+               if (fgets(l, sizeof(l) - 1, f) == NULL)
+                       continue;
+
+               c = sscanf(l, "[%lf] initcall %s %*s %d %*s %d %*s",
+                          &t, func, &ret, &usecs);
+               if (c != 4) {
+                       /* also parse initcalls done by module loading */
+                       c = sscanf(l, "[%lf] initcall %s %*s %*s %d %*s %d %*s",
+                                  &t, func, &ret, &usecs);
+                       if (c != 4)
+                               continue;
+               }
+
+               /* chop the +0xXX/0xXX stuff */
+               while(func[z] != '+')
+                       z++;
+               func[z] = 0;
+
+               if (count_only) {
+                       /* filter out irrelevant stuff */
+                       if (usecs >= 1000)
+                               kcount++;
+                       continue;
+               }
+
+               svg("<!-- thread=\"%s\" time=\"%.3f\" elapsed=\"%d\" result=\"%d\" -->\n",
+                   func, t, usecs, ret);
+
+               if (usecs < 1000)
+                       continue;
+
+               /* rect */
+               svg("  <rect class=\"krnl\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                   time_to_graph(t - (usecs / 1000000.0)),
+                   ps_to_graph(kcount),
+                   time_to_graph(usecs / 1000000.0),
+                   ps_to_graph(1));
+
+               /* label */
+               svg("  <text x=\"%.03f\" y=\"%.03f\">%s <tspan class=\"run\">%.03fs</tspan></text>\n",
+                   time_to_graph(t - (usecs / 1000000.0)) + 5,
+                   ps_to_graph(kcount) + 15,
+                   func,
+                   usecs / 1000000.0);
+
+               kcount++;
+       }
+
+       fclose(f);
+}
+
+
+static void svg_ps_bars(void)
+{
+       struct ps_struct *ps;
+       int i = 0;
+       int j = 0;
+       int w;
+       int pid;
+
+       svg("<!-- Process graph -->\n");
+
+       svg("<text class=\"t2\" x=\"5\" y=\"-15\">Processes</text>\n");
+
+       /* surrounding box */
+       svg_graph_box(pcount);
+
+       /* pass 2 - ps boxes */
+       ps = ps_first;
+       while ((ps = get_next_ps(ps))) {
+               double starttime;
+               int t;
+
+               if (!ps)
+                       continue;
+
+               /* leave some trace of what we actually filtered etc. */
+               svg("<!-- %s [%i] ppid=%i runtime=%.03fs -->\n", ps->name, ps->pid,
+                   ps->ppid, ps->total);
+
+               /* it would be nice if we could use exec_start from /proc/pid/sched,
+                * but it's unreliable and gives bogus numbers */
+               starttime = sampletime[ps->first];
+
+               if (!ps_filter(ps)) {
+                       /* remember where _to_ our children need to draw a line */
+                       ps->pos_x = time_to_graph(starttime - graph_start);
+                       ps->pos_y = ps_to_graph(j+1); /* bottom left corner */
+               } else {
+                       /* hook children to our parent coords instead */
+                       ps->pos_x = ps->parent->pos_x;
+                       ps->pos_y = ps->parent->pos_y;
+
+                       /* if this is the last child, we might still need to draw a connecting line */
+                       if ((!ps->next) && (ps->parent))
+                               svg("  <line class=\"dot\" x1=\"%.03f\" y1=\"%.03f\" x2=\"%.03f\" y2=\"%.03f\" />\n",
+                                   ps->parent->pos_x,
+                                   ps_to_graph(j-1) + 10.0, /* whee, use the last value here */
+                                   ps->parent->pos_x,
+                                   ps->parent->pos_y);
+                       continue;
+               }
+
+               svg("  <rect class=\"ps\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                   time_to_graph(starttime - graph_start),
+                   ps_to_graph(j),
+                   time_to_graph(sampletime[ps->last] - starttime),
+                   ps_to_graph(1));
+
+               /* paint cpu load over these */
+               for (t = ps->first + 1; t < ps->last; t++) {
+                       double rt, prt;
+                       double wt, wrt;
+
+                       /* calculate over interval */
+                       rt = ps->sample[t].runtime - ps->sample[t-1].runtime;
+                       wt = ps->sample[t].waittime - ps->sample[t-1].waittime;
+
+                       prt = (rt / 1000000000) / (sampletime[t] - sampletime[t-1]);
+                       wrt = (wt / 1000000000) / (sampletime[t] - sampletime[t-1]);
+
+                       /* this can happen if timekeeping isn't accurate enough */
+                       if (prt > 1.0)
+                               prt = 1.0;
+                       if (wrt > 1.0)
+                               wrt = 1.0;
+
+                       if ((prt < 0.1) && (wrt < 0.1)) /* =~ 26 (color threshold) */
+                               continue;
+
+                       svg("    <rect class=\"wait\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                           time_to_graph(sampletime[t - 1] - graph_start),
+                           ps_to_graph(j),
+                           time_to_graph(sampletime[t] - sampletime[t - 1]),
+                           ps_to_graph(wrt));
+
+                       /* draw cpu over wait - TODO figure out how/why run + wait > interval */
+                       svg("    <rect class=\"cpu\" x=\"%.03f\" y=\"%.03f\" width=\"%.03f\" height=\"%.03f\" />\n",
+                           time_to_graph(sampletime[t - 1] - graph_start),
+                           ps_to_graph(j + (1.0 - prt)),
+                           time_to_graph(sampletime[t] - sampletime[t - 1]),
+                           ps_to_graph(prt));
+               }
+
+               /* determine where to display the process name */
+               if (sampletime[ps->last] - sampletime[ps->first] < 1.5)
+                       /* too small to fit label inside the box */
+                       w = ps->last;
+               else
+                       w = ps->first;
+
+               /* text label of process name */
+               svg("  <text x=\"%.03f\" y=\"%.03f\">%s [%i] <tspan class=\"run\">%.03fs</tspan></text>\n",
+                   time_to_graph(sampletime[w] - graph_start) + 5.0,
+                   ps_to_graph(j) + 14.0,
+                   ps->name,
+                   ps->pid,
+                   (ps->sample[ps->last].runtime - ps->sample[ps->first].runtime) / 1000000000.0);
+               /* paint lines to the parent process */
+               if (ps->parent) {
+                       /* horizontal part */
+                       svg("  <line class=\"dot\" x1=\"%.03f\" y1=\"%.03f\" x2=\"%.03f\" y2=\"%.03f\" />\n",
+                           time_to_graph(starttime - graph_start),
+                           ps_to_graph(j) + 10.0,
+                           ps->parent->pos_x,
+                           ps_to_graph(j) + 10.0);
+
+                       /* one vertical line connecting all the horizontal ones up */
+                       if (!ps->next)
+                               svg("  <line class=\"dot\" x1=\"%.03f\" y1=\"%.03f\" x2=\"%.03f\" y2=\"%.03f\" />\n",
+                                   ps->parent->pos_x,
+                                   ps_to_graph(j) + 10.0,
+                                   ps->parent->pos_x,
+                                   ps->parent->pos_y);
+               }
+
+               j++; /* count boxes */
+
+               svg("\n");
+       }
+
+       /* last pass - determine when idle */
+       pid = getpid();
+       /* make sure we start counting from the point where we actually have
+        * data: assume that bootchart's first sample is when data started
+        */
+       ps = ps_first;
+       while (ps->next_ps) {
+               ps = ps->next_ps;
+               if (ps->pid == pid)
+                       break;
+       }
+
+       for (i = ps->first; i < samples - (hz / 2); i++) {
+               double crt;
+               double brt;
+               int c;
+
+               /* subtract bootchart cpu utilization from total */
+               crt = 0.0;
+               for (c = 0; c < cpus; c++)
+                       crt += cpustat[c].sample[i + ((int)hz / 2)].runtime - cpustat[c].sample[i].runtime;
+               brt = ps->sample[i + ((int)hz / 2)].runtime - ps->sample[i].runtime;
+
+               /*
+                * our definition of "idle":
+                *
+                * if for (hz / 2) we've used less CPU than (interval / 2) ...
+                * defaults to 4.0%, which experimentally, is where atom idles
+                */
+               if ((crt - brt) < (interval / 2.0)) {
+                       idletime = sampletime[i] - graph_start;
+                       svg("\n<!-- idle detected at %.03f seconds -->\n",
+                           idletime);
+                       svg("<line class=\"idle\" x1=\"%.03f\" y1=\"%.03f\" x2=\"%.03f\" y2=\"%.03f\" />\n",
+                           time_to_graph(idletime),
+                           -scale_y,
+                           time_to_graph(idletime),
+                           ps_to_graph(pcount) + scale_y);
+                       svg("<text class=\"idle\" x=\"%.03f\" y=\"%.03f\">%.01fs</text>\n",
+                           time_to_graph(idletime) + 5.0,
+                           ps_to_graph(pcount) + scale_y,
+                           idletime);
+                       break;
+               }
+       }
+}
+
+
+static void svg_top_ten_cpu(void)
+{
+       struct ps_struct *top[10];
+       struct ps_struct emptyps;
+       struct ps_struct *ps;
+       int n, m;
+
+       memset(&emptyps, 0, sizeof(struct ps_struct));
+       for (n=0; n < 10; n++)
+               top[n] = &emptyps;
+
+       /* walk all ps's and setup ptrs */
+       ps = ps_first;
+       while ((ps = get_next_ps(ps))) {
+               for (n = 0; n < 10; n++) {
+                       if (ps->total <= top[n]->total)
+                               continue;
+                       /* cascade insert */
+                       for (m = 9; m > n; m--)
+                               top[m] = top[m-1];
+                       top[n] = ps;
+                       break;
+               }
+       }
+
+       svg("<text class=\"t2\" x=\"20\" y=\"0\">Top CPU consumers:</text>\n");
+       for (n = 0; n < 10; n++)
+               svg("<text class=\"t3\" x=\"20\" y=\"%d\">%3.03fs - %s[%d]</text>\n",
+                   20 + (n * 13),
+                   top[n]->total,
+                   top[n]->name,
+                   top[n]->pid);
+}
+
+
+static void svg_top_ten_pss(void)
+{
+       struct ps_struct *top[10];
+       struct ps_struct emptyps;
+       struct ps_struct *ps;
+       int n, m;
+
+       memset(&emptyps, 0, sizeof(struct ps_struct));
+       for (n=0; n < 10; n++)
+               top[n] = &emptyps;
+
+       /* walk all ps's and setup ptrs */
+       ps = ps_first;
+       while ((ps = get_next_ps(ps))) {
+               for (n = 0; n < 10; n++) {
+                       if (ps->pss_max <= top[n]->pss_max)
+                               continue;
+                       /* cascade insert */
+                       for (m = 9; m > n; m--)
+                               top[m] = top[m-1];
+                       top[n] = ps;
+                       break;
+               }
+       }
+
+       svg("<text class=\"t2\" x=\"20\" y=\"0\">Top PSS consumers:</text>\n");
+       for (n = 0; n < 10; n++)
+               svg("<text class=\"t3\" x=\"20\" y=\"%d\">%dK - %s[%d]</text>\n",
+                   20 + (n * 13),
+                   top[n]->pss_max,
+                   top[n]->name,
+                   top[n]->pid);
+}
+
+
+void svg_do(void)
+{
+       struct ps_struct *ps;
+
+       memset(&str, 0, sizeof(str));
+
+       ps = ps_first;
+
+       /* count initcall thread count first */
+       svg_do_initcall(1);
+       ksize = (kcount ? ps_to_graph(kcount) + (scale_y * 2) : 0);
+
+       /* then count processes */
+       while ((ps = get_next_ps(ps))) {
+               if (!ps_filter(ps))
+                       pcount++;
+               else
+                       pfiltered++;
+       }
+       psize = ps_to_graph(pcount) + (scale_y * 2);
+
+       esize = (entropy ? scale_y * 7 : 0);
+
+       /* after this, we can draw the header with proper sizing */
+       svg_header();
+
+       svg("<g transform=\"translate(10,400)\">\n");
+       svg_io_bi_bar();
+       svg("</g>\n\n");
+
+       svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 7.0));
+       svg_io_bo_bar();
+       svg("</g>\n\n");
+
+       svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 14.0));
+       svg_cpu_bar();
+       svg("</g>\n\n");
+
+       svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 21.0));
+       svg_wait_bar();
+       svg("</g>\n\n");
+
+       if (kcount) {
+               svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 28.0));
+               svg_do_initcall(0);
+               svg("</g>\n\n");
+       }
+
+       svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 28.0) + ksize);
+       svg_ps_bars();
+       svg("</g>\n\n");
+
+       svg("<g transform=\"translate(10,  0)\">\n");
+       svg_title();
+       svg("</g>\n\n");
+
+       svg("<g transform=\"translate(10,200)\">\n");
+       svg_top_ten_cpu();
+       svg("</g>\n\n");
+
+       if (entropy) {
+               svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 28.0) + ksize + psize);
+               svg_entropy_bar();
+               svg("</g>\n\n");
+       }
+
+       if (pss) {
+               svg("<g transform=\"translate(10,%.03f)\">\n", 400.0 + (scale_y * 28.0) + ksize + psize + esize);
+               svg_pss_graph();
+               svg("</g>\n\n");
+
+               svg("<g transform=\"translate(410,200)\">\n");
+               svg_top_ten_pss();
+               svg("</g>\n\n");
+       }
+
+       /* svg footer */
+       svg("\n</svg>\n");
+}