+++ /dev/null
-/***
- log.c - This file is part of systemd-bootchart
-
- Copyright (C) 2009-2013 Intel Coproration
-
- 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/>.
- ***/
-
-#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"
-#include "util.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;
-int procfd=-1;
-
-double gettime_ns(void)
-{
- struct timespec n;
-
- clock_gettime(CLOCK_MONOTONIC, &n);
-
- return (n.tv_sec + (n.tv_nsec / 1000000000.0));
-}
-
-
-void log_uptime(void)
-{
- FILE _cleanup_fclose_ *f = NULL;
- char str[32];
- double uptime;
-
- f = fopen("/proc/uptime", "r");
-
- if (!f)
- return;
- if (!fscanf(f, "%s %*s", str))
- return;
-
- 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;
-}
-
-static int pid_cmdline_strncpy(char *buffer, int pid, size_t buf_len) {
- char filename[PATH_MAX];
- int _cleanup_close_ fd=-1;
- ssize_t n;
-
- sprintf(filename, "%d/cmdline", pid);
- fd = openat(procfd, filename, O_RDONLY);
- if (fd < 0)
- return -errno;
-
- n = read(fd, buffer, buf_len-1);
- if (n > 0) {
- int i;
- for (i = 0; i < n; i++)
- if (buffer[i] == '\0')
- buffer[i] = ' ';
- buffer[n] = '\0';
- }
- return 0;
-}
-
-void log_sample(int sample)
-{
- static int vmstat;
- static int schedstat;
- 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;
- int fd;
-
- /* all the per-process stuff goes here */
- if (!proc) {
- /* find all processes */
- proc = opendir("/proc");
- if (!proc)
- return;
- procfd = dirfd(proc);
- } else {
- rewinddir(proc);
- }
-
- if (!vmstat) {
- /* block stuff */
- vmstat = openat(procfd, "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 (streq(key, "pgpgin"))
- blockstat[sample].bi = atoi(val);
- if (streq(key, "pgpgout")) {
- blockstat[sample].bo = atoi(val);
- break;
- }
-vmstat_next:
- m = bufgetline(m);
- if (!m)
- break;
- }
-
- if (!schedstat) {
- /* overall CPU utilization */
- schedstat = openat(procfd, "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 = openat(procfd, "sys/kernel/random/entropy_avail", O_RDONLY);
- }
-
- if (e_fd) {
- n = pread(e_fd, buf, sizeof(buf) - 1, 0);
- if (n > 0) {
- buf[n] = '\0';
- entropy_avail[sample] = atoi(buf);
- }
- }
- }
-
- 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) {
- FILE _cleanup_fclose_ *st = NULL;
- char t[32];
- struct ps_struct *parent;
-
- ps->next_ps = calloc(1, sizeof(struct ps_struct));
- if (!ps->next_ps) {
- perror("calloc(ps_struct)");
- exit (EXIT_FAILURE);
- }
- ps = ps->next_ps;
- ps->pid = pid;
-
- ps->sample = calloc(samples_len + 1, sizeof(struct ps_sched_struct));
- if (!ps->sample) {
- perror("calloc(ps_struct)");
- exit (EXIT_FAILURE);
- }
-
- pscount++;
-
- /* mark our first sample */
- ps->first = sample;
-
- /* get name, start time */
- if (!ps->sched) {
- sprintf(filename, "%d/sched", pid);
- ps->sched = openat(procfd, filename, O_RDONLY);
- if (ps->sched == -1)
- continue;
- }
-
- s = pread(ps->sched, buf, sizeof(buf) - 1, 0);
- if (s <= 0) {
- close(ps->sched);
- continue;
- }
- buf[s] = '\0';
-
- if (!sscanf(buf, "%s %*s %*s", key))
- continue;
-
- strncpy(ps->name, key, 256);
-
- /* cmdline */
- if (show_cmdline)
- pid_cmdline_strncpy(ps->name, pid, 256);
-
- /* 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, "%d/stat", pid);
- fd = openat(procfd, filename, O_RDONLY);
- st = fdopen(fd, "r");
- if (!st)
- continue;
- if (!fscanf(st, "%*s %*s %*s %i", &p)) {
- continue;
- }
- 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, "%d/schedstat", pid);
- ps->schedstat = openat(procfd, filename, O_RDONLY);
- if (ps->schedstat == -1)
- continue;
- }
- s = pread(ps->schedstat, buf, sizeof(buf) - 1, 0);
- if (s <= 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;
- }
- buf[s] = '\0';
-
- 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, "%d/smaps", pid);
- fd = openat(procfd, filename, O_RDONLY);
- ps->smaps = fdopen(fd, "r");
- if (!ps->smaps)
- continue;
- setvbuf(ps->smaps, smaps_buf, _IOFBF, sizeof(smaps_buf));
- } 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, "%d/sched", pid);
- ps->sched = openat(procfd, filename, O_RDONLY);
- if (ps->sched == -1)
- continue;
- }
- s = pread(ps->sched, buf, sizeof(buf) - 1, 0);
- if (s <= 0) {
- /* clean up file descriptors */
- close(ps->sched);
- if (ps->schedstat)
- close(ps->schedstat);
- //if (ps->smaps)
- // fclose(ps->smaps);
- continue;
- }
- buf[s] = '\0';
-
- if (!sscanf(buf, "%s %*s %*s", key))
- continue;
-
- strncpy(ps->name, key, 256);
-
- /* cmdline */
- if (show_cmdline)
- pid_cmdline_strncpy(ps->name, pid, 256);
- }
- }
-}
~ianmdlvl / elogind.git / blobdiff