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Diffstat (limited to 'src/systemd-bootchart/bootchart.c')
-rw-r--r--src/systemd-bootchart/bootchart.c531
1 files changed, 531 insertions, 0 deletions
diff --git a/src/systemd-bootchart/bootchart.c b/src/systemd-bootchart/bootchart.c
new file mode 100644
index 0000000000..77d158f5f9
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+++ b/src/systemd-bootchart/bootchart.c
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+/***
+ This file is part of systemd.
+
+ Copyright (C) 2009-2013 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/>.
+ ***/
+
+/***
+
+ 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 <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "sd-journal.h"
+
+#include "alloc-util.h"
+#include "bootchart.h"
+#include "conf-parser.h"
+#include "def.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "io-util.h"
+#include "list.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "store.h"
+#include "string-util.h"
+#include "strxcpyx.h"
+#include "svg.h"
+#include "util.h"
+
+static int exiting = 0;
+
+#define DEFAULT_SAMPLES_LEN 500
+#define DEFAULT_HZ 25.0
+#define DEFAULT_SCALE_X 100.0 /* 100px = 1sec */
+#define DEFAULT_SCALE_Y 20.0 /* 16px = 1 process bar */
+#define DEFAULT_INIT ROOTLIBEXECDIR "/systemd"
+#define DEFAULT_OUTPUT "/run/log"
+
+/* graph defaults */
+bool arg_entropy = false;
+bool arg_initcall = true;
+bool arg_relative = false;
+bool arg_filter = true;
+bool arg_show_cmdline = false;
+bool arg_show_cgroup = false;
+bool arg_pss = false;
+bool arg_percpu = false;
+int arg_samples_len = DEFAULT_SAMPLES_LEN; /* we record len+1 (1 start sample) */
+double arg_hz = DEFAULT_HZ;
+double arg_scale_x = DEFAULT_SCALE_X;
+double arg_scale_y = DEFAULT_SCALE_Y;
+
+char arg_init_path[PATH_MAX] = DEFAULT_INIT;
+char arg_output_path[PATH_MAX] = DEFAULT_OUTPUT;
+
+static void signal_handler(int sig) {
+ exiting = 1;
+}
+
+#define BOOTCHART_MAX (16*1024*1024)
+
+static void parse_conf(void) {
+ char *init = NULL, *output = NULL;
+ const ConfigTableItem items[] = {
+ { "Bootchart", "Samples", config_parse_int, 0, &arg_samples_len },
+ { "Bootchart", "Frequency", config_parse_double, 0, &arg_hz },
+ { "Bootchart", "Relative", config_parse_bool, 0, &arg_relative },
+ { "Bootchart", "Filter", config_parse_bool, 0, &arg_filter },
+ { "Bootchart", "Output", config_parse_path, 0, &output },
+ { "Bootchart", "Init", config_parse_path, 0, &init },
+ { "Bootchart", "PlotMemoryUsage", config_parse_bool, 0, &arg_pss },
+ { "Bootchart", "PlotEntropyGraph", config_parse_bool, 0, &arg_entropy },
+ { "Bootchart", "ScaleX", config_parse_double, 0, &arg_scale_x },
+ { "Bootchart", "ScaleY", config_parse_double, 0, &arg_scale_y },
+ { "Bootchart", "ControlGroup", config_parse_bool, 0, &arg_show_cgroup },
+ { "Bootchart", "PerCPU", config_parse_bool, 0, &arg_percpu },
+ { NULL, NULL, NULL, 0, NULL }
+ };
+
+ config_parse_many(PKGSYSCONFDIR "/bootchart.conf",
+ CONF_PATHS_NULSTR("systemd/bootchart.conf.d"),
+ NULL, config_item_table_lookup, items, true, NULL);
+
+ if (init != NULL)
+ strscpy(arg_init_path, sizeof(arg_init_path), init);
+ if (output != NULL)
+ strscpy(arg_output_path, sizeof(arg_output_path), output);
+}
+
+static void help(void) {
+ printf("Usage: %s [OPTIONS]\n\n"
+ "Options:\n"
+ " -r --rel Record time relative to recording\n"
+ " -f --freq=FREQ Sample frequency [%g]\n"
+ " -n --samples=N Stop sampling at [%d] samples\n"
+ " -x --scale-x=N Scale the graph horizontally [%g] \n"
+ " -y --scale-y=N Scale the graph vertically [%g] \n"
+ " -p --pss Enable PSS graph (CPU intensive)\n"
+ " -e --entropy Enable the entropy_avail graph\n"
+ " -o --output=PATH Path to output files [%s]\n"
+ " -i --init=PATH Path to init executable [%s]\n"
+ " -F --no-filter Disable filtering of unimportant or ephemeral processes\n"
+ " -C --cmdline Display full command lines with arguments\n"
+ " -c --control-group Display process control group\n"
+ " --per-cpu Draw each CPU utilization and wait bar also\n"
+ " -h --help Display this message\n\n"
+ "See bootchart.conf for more information.\n",
+ program_invocation_short_name,
+ DEFAULT_HZ,
+ DEFAULT_SAMPLES_LEN,
+ DEFAULT_SCALE_X,
+ DEFAULT_SCALE_Y,
+ DEFAULT_OUTPUT,
+ DEFAULT_INIT);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_PERCPU = 0x100,
+ };
+
+ static const struct option options[] = {
+ {"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' },
+ {"control-group", 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' },
+ {"per-cpu", no_argument, NULL, ARG_PERCPU},
+ {}
+ };
+ int c, r;
+
+ if (getpid() == 1)
+ opterr = 0;
+
+ while ((c = getopt_long(argc, argv, "erpf:n:o:i:FCchx:y:", options, NULL)) >= 0)
+ switch (c) {
+
+ case 'r':
+ arg_relative = true;
+ break;
+ case 'f':
+ r = safe_atod(optarg, &arg_hz);
+ if (r < 0)
+ log_warning_errno(r, "failed to parse --freq/-f argument '%s': %m",
+ optarg);
+ break;
+ case 'F':
+ arg_filter = false;
+ break;
+ case 'C':
+ arg_show_cmdline = true;
+ break;
+ case 'c':
+ arg_show_cgroup = true;
+ break;
+ case 'n':
+ r = safe_atoi(optarg, &arg_samples_len);
+ if (r < 0)
+ log_warning_errno(r, "failed to parse --samples/-n argument '%s': %m",
+ optarg);
+ break;
+ case 'o':
+ path_kill_slashes(optarg);
+ strscpy(arg_output_path, sizeof(arg_output_path), optarg);
+ break;
+ case 'i':
+ path_kill_slashes(optarg);
+ strscpy(arg_init_path, sizeof(arg_init_path), optarg);
+ break;
+ case 'p':
+ arg_pss = true;
+ break;
+ case 'x':
+ r = safe_atod(optarg, &arg_scale_x);
+ if (r < 0)
+ log_warning_errno(r, "failed to parse --scale-x/-x argument '%s': %m",
+ optarg);
+ break;
+ case 'y':
+ r = safe_atod(optarg, &arg_scale_y);
+ if (r < 0)
+ log_warning_errno(r, "failed to parse --scale-y/-y argument '%s': %m",
+ optarg);
+ break;
+ case 'e':
+ arg_entropy = true;
+ break;
+ case ARG_PERCPU:
+ arg_percpu = true;
+ break;
+ case 'h':
+ help();
+ return 0;
+ case '?':
+ if (getpid() != 1)
+ return -EINVAL;
+ else
+ return 0;
+ default:
+ assert_not_reached("Unhandled option code.");
+ }
+
+ if (arg_hz <= 0) {
+ log_error("Frequency needs to be > 0");
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+static int do_journal_append(char *file) {
+ _cleanup_free_ char *bootchart_message = NULL;
+ _cleanup_free_ char *bootchart_file = NULL;
+ _cleanup_free_ char *p = NULL;
+ _cleanup_close_ int fd = -1;
+ struct iovec iovec[5];
+ int r, j = 0;
+ ssize_t n;
+
+ bootchart_file = strappend("BOOTCHART_FILE=", file);
+ if (!bootchart_file)
+ return log_oom();
+
+ IOVEC_SET_STRING(iovec[j++], bootchart_file);
+ IOVEC_SET_STRING(iovec[j++], "MESSAGE_ID=9f26aa562cf440c2b16c773d0479b518");
+ IOVEC_SET_STRING(iovec[j++], "PRIORITY=7");
+ bootchart_message = strjoin("MESSAGE=Bootchart created: ", file, NULL);
+ if (!bootchart_message)
+ return log_oom();
+
+ IOVEC_SET_STRING(iovec[j++], bootchart_message);
+
+ p = malloc(10 + BOOTCHART_MAX);
+ if (!p)
+ return log_oom();
+
+ memcpy(p, "BOOTCHART=", 10);
+
+ fd = open(file, O_RDONLY|O_CLOEXEC);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to open bootchart data \"%s\": %m", file);
+
+ n = loop_read(fd, p + 10, BOOTCHART_MAX, false);
+ if (n < 0)
+ return log_error_errno(n, "Failed to read bootchart data: %m");
+
+ iovec[j].iov_base = p;
+ iovec[j].iov_len = 10 + n;
+ j++;
+
+ r = sd_journal_sendv(iovec, j);
+ if (r < 0)
+ log_error_errno(r, "Failed to send bootchart: %m");
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ static struct list_sample_data *sampledata;
+ _cleanup_closedir_ DIR *proc = NULL;
+ _cleanup_free_ char *build = NULL;
+ _cleanup_fclose_ FILE *of = NULL;
+ _cleanup_close_ int sysfd = -1;
+ struct ps_struct *ps_first;
+ double graph_start;
+ double log_start;
+ double interval;
+ char output_file[PATH_MAX];
+ char datestr[200];
+ int pscount = 0;
+ int n_cpus = 0;
+ int overrun = 0;
+ time_t t = 0;
+ int r, samples;
+ struct ps_struct *ps;
+ struct rlimit rlim;
+ struct list_sample_data *head;
+ struct sigaction sig = {
+ .sa_handler = signal_handler,
+ };
+
+ parse_conf();
+
+ r = parse_argv(argc, argv);
+ if (r < 0)
+ return EXIT_FAILURE;
+
+ if (r == 0)
+ return EXIT_SUCCESS;
+
+ /*
+ * If the kernel executed us through init=/usr/lib/systemd/systemd-bootchart, then
+ * fork:
+ * - parent execs executable specified via init_path[] (/usr/lib/systemd/systemd by default) as pid=1
+ * - child logs data
+ */
+ if (getpid() == 1) {
+ if (fork())
+ /* parent */
+ execl(arg_init_path, arg_init_path, NULL);
+ }
+ argv[0][0] = '@';
+
+ rlim.rlim_cur = 4096;
+ rlim.rlim_max = 4096;
+ (void) setrlimit(RLIMIT_NOFILE, &rlim);
+
+ /* start with empty ps LL */
+ ps_first = new0(struct ps_struct, 1);
+ if (!ps_first) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ /* handle TERM/INT nicely */
+ sigaction(SIGHUP, &sig, NULL);
+
+ interval = (1.0 / arg_hz) * 1000000000.0;
+
+ if (arg_relative)
+ graph_start = log_start = gettime_ns();
+ else {
+ struct timespec n;
+ double uptime;
+
+ clock_gettime(clock_boottime_or_monotonic(), &n);
+ uptime = (n.tv_sec + (n.tv_nsec / (double) NSEC_PER_SEC));
+
+ log_start = gettime_ns();
+ graph_start = log_start - uptime;
+ }
+
+ if (graph_start < 0.0) {
+ log_error("Failed to setup graph start time.\n\n"
+ "The system uptime probably includes time that the system was suspended. "
+ "Use --rel to bypass this issue.");
+ return EXIT_FAILURE;
+ }
+
+ LIST_HEAD_INIT(head);
+
+ /* main program loop */
+ for (samples = 0; !exiting && samples < arg_samples_len; samples++) {
+ int res;
+ double sample_stop;
+ double elapsed;
+ double timeleft;
+
+ sampledata = new0(struct list_sample_data, 1);
+ if (sampledata == NULL) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ sampledata->sampletime = gettime_ns();
+ sampledata->counter = samples;
+
+ if (sysfd < 0)
+ sysfd = open("/sys", O_RDONLY|O_CLOEXEC);
+
+ if (!build) {
+ if (parse_env_file("/etc/os-release", NEWLINE, "PRETTY_NAME", &build, NULL) == -ENOENT)
+ parse_env_file("/usr/lib/os-release", NEWLINE, "PRETTY_NAME", &build, NULL);
+ }
+
+ if (proc)
+ rewinddir(proc);
+ else
+ proc = opendir("/proc");
+
+ /* wait for /proc to become available, discarding samples */
+ if (proc) {
+ r = log_sample(proc, samples, ps_first, &sampledata, &pscount, &n_cpus);
+ if (r < 0)
+ return EXIT_FAILURE;
+ }
+
+ sample_stop = gettime_ns();
+
+ elapsed = (sample_stop - sampledata->sampletime) * 1000000000.0;
+ timeleft = interval - elapsed;
+
+ /*
+ * 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 (timeleft > 0) {
+ struct timespec req;
+
+ req.tv_sec = (time_t)(timeleft / 1000000000.0);
+ req.tv_nsec = (long)(timeleft - (req.tv_sec * 1000000000.0));
+
+ res = nanosleep(&req, NULL);
+ if (res) {
+ if (errno == EINTR)
+ /* caught signal, probably HUP! */
+ break;
+ log_error_errno(errno, "nanosleep() failed: %m");
+ return EXIT_FAILURE;
+ }
+ } else {
+ overrun++;
+ /* calculate how many samples we lost and scrap them */
+ arg_samples_len -= (int)(-timeleft / interval);
+ }
+ LIST_PREPEND(link, head, sampledata);
+ }
+
+ /* do some cleanup, close fd's */
+ ps = ps_first;
+ while (ps->next_ps) {
+ ps = ps->next_ps;
+ ps->schedstat = safe_close(ps->schedstat);
+ ps->sched = safe_close(ps->sched);
+ ps->smaps = safe_fclose(ps->smaps);
+ }
+
+ if (!of) {
+ t = time(NULL);
+ r = strftime(datestr, sizeof(datestr), "%Y%m%d-%H%M", localtime(&t));
+ assert_se(r > 0);
+
+ snprintf(output_file, PATH_MAX, "%s/bootchart-%s.svg", arg_output_path, datestr);
+ of = fopen(output_file, "we");
+ }
+
+ if (!of) {
+ log_error("Error opening output file '%s': %m\n", output_file);
+ return EXIT_FAILURE;
+ }
+
+ r = svg_do(of, strna(build), head, ps_first,
+ samples, pscount, n_cpus, graph_start,
+ log_start, interval, overrun);
+
+ if (r < 0) {
+ log_error_errno(r, "Error generating svg file: %m");
+ return EXIT_FAILURE;
+ }
+
+ log_info("systemd-bootchart wrote %s\n", output_file);
+
+ r = do_journal_append(output_file);
+ if (r < 0)
+ return EXIT_FAILURE;
+
+ /* nitpic cleanups */
+ ps = ps_first->next_ps;
+ while (ps->next_ps) {
+ struct ps_struct *old;
+
+ old = ps;
+ old->sample = ps->first;
+ ps = ps->next_ps;
+ while (old->sample->next) {
+ struct ps_sched_struct *oldsample = old->sample;
+
+ old->sample = old->sample->next;
+ free(oldsample);
+ }
+ free(old->cgroup);
+ free(old->sample);
+ free(old);
+ }
+
+ free(ps->cgroup);
+ free(ps->sample);
+ free(ps);
+
+ sampledata = head;
+ while (sampledata->link_prev) {
+ struct list_sample_data *old_sampledata = sampledata;
+ sampledata = sampledata->link_prev;
+ free(old_sampledata);
+ }
+ free(sampledata);
+
+ /* don't complain when overrun once, happens most commonly on 1st sample */
+ if (overrun > 1)
+ log_warning("systemd-bootchart: sample time overrun %i times\n", overrun);
+
+ return 0;
+}
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