2 bootchart.c - This file is part of systemd-bootchart
4 Copyright (C) 2009-2013 Intel Coproration
7 Auke Kok <auke-jan.h.kok@intel.com>
9 systemd is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 systemd is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 Many thanks to those who contributed ideas and code:
26 - Ziga Mahkovec - Original bootchart author
27 - Anders Norgaard - PyBootchartgui
28 - Michael Meeks - bootchart2
29 - Scott James Remnant - Ubuntu C-based logger
30 - Arjan van der Ven - for the idea to merge bootgraph.pl functionality
35 #include <sys/types.h>
36 #include <sys/resource.h>
51 #include "bootchart.h"
55 #include "conf-parser.h"
57 #include "path-util.h"
61 double sampletime[MAXSAMPLES];
62 struct ps_struct *ps_first;
63 struct block_stat_struct blockstat[MAXSAMPLES];
64 int entropy_avail[MAXSAMPLES];
65 struct cpu_stat_struct cpustat[MAXCPUS];
69 FILE _cleanup_fclose_ *of = NULL;
71 static int exiting = 0;
72 int _cleanup_close_ sysfd=-1;
77 bool relative = false;
79 bool show_cmdline = false;
82 int samples_len = 500; /* we record len+1 (1 start sample) */
83 double hz = 25.0; /* 20 seconds log time */
84 double scale_x = 100.0; /* 100px = 1sec */
85 double scale_y = 20.0; /* 16px = 1 process bar */
87 char init_path[PATH_MAX] = "/sbin/init";
88 char output_path[PATH_MAX] = "/run/log";
90 static struct rlimit rlim;
92 static void signal_handler(int sig)
100 int main(int argc, char *argv[])
102 _cleanup_free_ char *build = NULL;
103 struct sigaction sig;
104 struct ps_struct *ps;
105 char output_file[PATH_MAX];
109 _cleanup_fclose_ FILE *f = NULL;
112 char *init = NULL, *output = NULL;
114 const ConfigTableItem items[] = {
115 { "Bootchart", "Samples", config_parse_int, 0, &samples_len },
116 { "Bootchart", "Frequency", config_parse_double, 0, &hz },
117 { "Bootchart", "Relative", config_parse_bool, 0, &relative },
118 { "Bootchart", "Filter", config_parse_bool, 0, &filter },
119 { "Bootchart", "Output", config_parse_path, 0, &output },
120 { "Bootchart", "Init", config_parse_path, 0, &init },
121 { "Bootchart", "PlotMemoryUsage", config_parse_bool, 0, &pss },
122 { "Bootchart", "PlotEntropyGraph", config_parse_bool, 0, &entropy },
123 { "Bootchart", "ScaleX", config_parse_double, 0, &scale_x },
124 { "Bootchart", "ScaleY", config_parse_double, 0, &scale_y },
125 { NULL, NULL, NULL, 0, NULL }
128 rlim.rlim_cur = 4096;
129 rlim.rlim_max = 4096;
130 (void) setrlimit(RLIMIT_NOFILE, &rlim);
132 fn = "/etc/systemd/bootchart.conf";
135 r = config_parse(fn, f, NULL, config_item_table_lookup, (void*) items, true, NULL);
137 log_warning("Failed to parse configuration file: %s", strerror(-r));
140 strscpy(init_path, sizeof(init_path), init);
142 strscpy(output_path, sizeof(output_path), output);
146 static struct option opts[] = {
147 {"rel", no_argument, NULL, 'r'},
148 {"freq", required_argument, NULL, 'f'},
149 {"samples", required_argument, NULL, 'n'},
150 {"pss", no_argument, NULL, 'p'},
151 {"output", required_argument, NULL, 'o'},
152 {"init", required_argument, NULL, 'i'},
153 {"no-filter", no_argument, NULL, 'F'},
154 {"cmdline", no_argument, NULL, 'C'},
155 {"help", no_argument, NULL, 'h'},
156 {"scale-x", required_argument, NULL, 'x'},
157 {"scale-y", required_argument, NULL, 'y'},
158 {"entropy", no_argument, NULL, 'e'},
164 i = getopt_long(argc, argv, "erpf:n:o:i:FChx:y:", opts, &gind);
172 r = safe_atod(optarg, &hz);
174 log_warning("failed to parse --freq/-f argument '%s': %s",
175 optarg, strerror(-r));
184 r = safe_atoi(optarg, &samples_len);
186 log_warning("failed to parse --samples/-n argument '%s': %s",
187 optarg, strerror(-r));
190 path_kill_slashes(optarg);
191 strscpy(output_path, sizeof(output_path), optarg);
194 path_kill_slashes(optarg);
195 strscpy(init_path, sizeof(init_path), optarg);
201 r = safe_atod(optarg, &scale_x);
203 log_warning("failed to parse --scale-x/-x argument '%s': %s",
204 optarg, strerror(-r));
207 r = safe_atod(optarg, &scale_y);
209 log_warning("failed to parse --scale-y/-y argument '%s': %s",
210 optarg, strerror(-r));
216 fprintf(stderr, "Usage: %s [OPTIONS]\n", argv[0]);
217 fprintf(stderr, " --rel, -r Record time relative to recording\n");
218 fprintf(stderr, " --freq, -f f Sample frequency [%f]\n", hz);
219 fprintf(stderr, " --samples, -n N Stop sampling at [%d] samples\n", samples_len);
220 fprintf(stderr, " --scale-x, -x N Scale the graph horizontally [%f] \n", scale_x);
221 fprintf(stderr, " --scale-y, -y N Scale the graph vertically [%f] \n", scale_y);
222 fprintf(stderr, " --pss, -p Enable PSS graph (CPU intensive)\n");
223 fprintf(stderr, " --entropy, -e Enable the entropy_avail graph\n");
224 fprintf(stderr, " --output, -o [PATH] Path to output files [%s]\n", output_path);
225 fprintf(stderr, " --init, -i [PATH] Path to init executable [%s]\n", init_path);
226 fprintf(stderr, " --no-filter, -F Disable filtering of processes from the graph\n");
227 fprintf(stderr, " that are of less importance or short-lived\n");
228 fprintf(stderr, " --cmdline, -C Display the full command line with arguments\n");
229 fprintf(stderr, " of processes, instead of only the process name\n");
230 fprintf(stderr, " --help, -h Display this message\n");
231 fprintf(stderr, "See bootchart.conf for more information.\n");
239 if (samples_len > MAXSAMPLES) {
240 fprintf(stderr, "Error: samples exceeds maximum\n");
245 fprintf(stderr, "Error: Frequency needs to be > 0\n");
250 * If the kernel executed us through init=/usr/lib/systemd/systemd-bootchart, then
252 * - parent execs executable specified via init_path[] (/sbin/init by default) as pid=1
258 execl(init_path, init_path, NULL);
263 /* start with empty ps LL */
264 ps_first = calloc(1, sizeof(struct ps_struct));
266 perror("calloc(ps_struct)");
270 /* handle TERM/INT nicely */
271 memset(&sig, 0, sizeof(struct sigaction));
272 sig.sa_handler = signal_handler;
273 sigaction(SIGHUP, &sig, NULL);
275 interval = (1.0 / hz) * 1000000000.0;
279 /* main program loop */
289 sampletime[samples] = gettime_ns();
291 if (!of && (access(output_path, R_OK|W_OK|X_OK) == 0)) {
293 strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
294 snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", output_path, datestr);
295 of = fopen(output_file, "w");
299 sysfd = open("/sys", O_RDONLY);
303 parse_env_file("/etc/os-release", NEWLINE,
304 "PRETTY_NAME", &build,
308 /* wait for /proc to become available, discarding samples */
309 if (!(graph_start > 0.0))
314 sample_stop = gettime_ns();
316 elapsed = (sample_stop - sampletime[samples]) * 1000000000.0;
317 timeleft = interval - elapsed;
319 newint_s = (time_t)(timeleft / 1000000000.0);
320 newint_ns = (long)(timeleft - (newint_s * 1000000000.0));
323 * check if we have not consumed our entire timeslice. If we
324 * do, don't sleep and take a new sample right away.
325 * we'll lose all the missed samples and overrun our total
328 if ((newint_ns > 0) || (newint_s > 0)) {
329 req.tv_sec = newint_s;
330 req.tv_nsec = newint_ns;
332 res = nanosleep(&req, NULL);
334 if (errno == EINTR) {
335 /* caught signal, probably HUP! */
338 perror("nanosleep()");
343 /* calculate how many samples we lost and scrap them */
344 samples_len = samples_len + ((int)(newint_ns / interval));
349 if (samples > samples_len)
354 /* do some cleanup, close fd's */
356 while (ps->next_ps) {
359 close(ps->schedstat);
368 strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
369 snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", output_path, datestr);
370 of = fopen(output_file, "w");
374 fprintf(stderr, "opening output file '%s': %m\n", output_file);
380 fprintf(stderr, "systemd-bootchart wrote %s\n", output_file);
384 /* nitpic cleanups */
386 while (ps->next_ps) {
387 struct ps_struct *old = ps;
395 /* don't complain when overrun once, happens most commonly on 1st sample */
397 fprintf(stderr, "systemd-boochart: Warning: sample time overrun %i times\n", overrun);