/*** bootchart.c - This file is part of systemd-bootchart Copyright (C) 2009-2013 Intel Coproration Authors: Auke Kok 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 . ***/ /*** 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 ***/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bootchart.h" #include "util.h" #include "fileio.h" #include "macro.h" #include "conf-parser.h" #include "strxcpyx.h" #include "path-util.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 = NULL; int overrun = 0; static int exiting = 0; int sysfd=-1; /* graph defaults */ bool entropy = false; bool initcall = true; bool relative = false; bool filter = true; bool show_cmdline = false; bool pss = false; int samples; int samples_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] = "/run/log"; static struct rlimit rlim; static void signal_handler(int sig) { if (sig++) sig--; exiting = 1; } int main(int argc, char *argv[]) { _cleanup_free_ char *build = NULL; struct sigaction sig; struct ps_struct *ps; char output_file[PATH_MAX]; char datestr[200]; time_t t = 0; const char *fn; _cleanup_fclose_ FILE *f; int gind; int i, r; char *init = NULL, *output = NULL; const ConfigTableItem items[] = { { "Bootchart", "Samples", config_parse_int, 0, &samples_len }, { "Bootchart", "Frequency", config_parse_double, 0, &hz }, { "Bootchart", "Relative", config_parse_bool, 0, &relative }, { "Bootchart", "Filter", config_parse_bool, 0, &filter }, { "Bootchart", "Output", config_parse_path, 0, &output }, { "Bootchart", "Init", config_parse_path, 0, &init }, { "Bootchart", "PlotMemoryUsage", config_parse_bool, 0, &pss }, { "Bootchart", "PlotEntropyGraph", config_parse_bool, 0, &entropy }, { "Bootchart", "ScaleX", config_parse_double, 0, &scale_x }, { "Bootchart", "ScaleY", config_parse_double, 0, &scale_y }, { NULL, NULL, NULL, 0, NULL } }; rlim.rlim_cur = 4096; rlim.rlim_max = 4096; (void) setrlimit(RLIMIT_NOFILE, &rlim); fn = "/etc/systemd/bootchart.conf"; f = fopen(fn, "re"); if (f) { r = config_parse(fn, f, NULL, config_item_table_lookup, (void*) items, true, NULL); if (r < 0) log_warning("Failed to parse configuration file: %s", strerror(-r)); if (init != NULL) strscpy(init_path, sizeof(init_path), init); if (output != NULL) strscpy(output_path, sizeof(output_path), output); } while (1) { static struct option opts[] = { {"rel", no_argument, NULL, 'r'}, {"freq", required_argument, NULL, 'f'}, {"samples", required_argument, NULL, 'n'}, {"pss", no_argument, NULL, 'p'}, {"output", required_argument, NULL, 'o'}, {"init", required_argument, NULL, 'i'}, {"no-filter", no_argument, NULL, 'F'}, {"cmdline", no_argument, NULL, 'C'}, {"help", no_argument, NULL, 'h'}, {"scale-x", required_argument, NULL, 'x'}, {"scale-y", required_argument, NULL, 'y'}, {"entropy", no_argument, NULL, 'e'}, {NULL, 0, NULL, 0} }; gind = 0; i = getopt_long(argc, argv, "erpf:n:o:i:FChx:y:", opts, &gind); if (i == -1) break; switch (i) { case 'r': relative = true; break; case 'f': r = safe_atod(optarg, &hz); if (r < 0) log_warning("failed to parse --freq/-f argument '%s': %s", optarg, strerror(-r)); break; case 'F': filter = false; break; case 'C': show_cmdline = true; break; case 'n': r = safe_atoi(optarg, &samples_len); if (r < 0) log_warning("failed to parse --samples/-n argument '%s': %s", optarg, strerror(-r)); break; case 'o': path_kill_slashes(optarg); strscpy(output_path, sizeof(output_path), optarg); break; case 'i': path_kill_slashes(optarg); strscpy(init_path, sizeof(init_path), optarg); break; case 'p': pss = true; break; case 'x': r = safe_atod(optarg, &scale_x); if (r < 0) log_warning("failed to parse --scale-x/-x argument '%s': %s", optarg, strerror(-r)); break; case 'y': r = safe_atod(optarg, &scale_y); if (r < 0) log_warning("failed to parse --scale-y/-y argument '%s': %s", optarg, strerror(-r)); break; case 'e': entropy = true; 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 f Sample frequency [%f]\n", hz); fprintf(stderr, " --samples, -n N Stop sampling at [%d] samples\n", samples_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, " --no-filter, -F Disable filtering of processes from the graph\n"); fprintf(stderr, " that are of less importance or short-lived\n"); fprintf(stderr, " --cmdline, -C Display the full command line with arguments\n"); fprintf(stderr, " of processes, instead of only the process name\n"); fprintf(stderr, " --help, -h Display this message\n"); fprintf(stderr, "See bootchart.conf for more information.\n"); exit (EXIT_SUCCESS); break; default: break; } } if (samples_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=/usr/lib/systemd/systemd-bootchart, 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); } } argv[0][0] = '@'; /* start with empty ps LL */ ps_first = calloc(1, sizeof(struct ps_struct)); if (!ps_first) { perror("calloc(ps_struct)"); exit(EXIT_FAILURE); } /* 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(); if (!of && (access(output_path, R_OK|W_OK|X_OK) == 0)) { 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 (sysfd < 0) { sysfd = open("/sys", O_RDONLY); } if (!build) { parse_env_file("/etc/os-release", NEWLINE, "PRETTY_NAME", &build, NULL); } /* 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 */ samples_len = samples_len + ((int)(newint_ns / interval)); } samples++; if (samples > 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); } if (!of) { 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) { fprintf(stderr, "opening output file '%s': %m\n", output_file); exit (EXIT_FAILURE); } svg_do(build); fprintf(stderr, "systemd-bootchart wrote %s\n", output_file); fclose(of); closedir(proc); close(sysfd); /* 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, "systemd-boochart: Warning: sample time overrun %i times\n", overrun); return 0; }