bootchartd: new applet
Usage: bootchartd start [PROG ARGS]|init|stop Create /var/log/bootchart.tgz with boot chart data Options: start: start background logging; with PROG, run PROG, then kill logging with USR1 stop: send USR1 to all bootchartd processes init: start background logging; stop when getty/gdm is seen (for init scripts) Under PID 1: as init, then exec $bootchart_init, /init, /sbin/init function old new delta bootchartd_main - 907 +907 dump_procs - 353 +353 packed_usage 26566 26735 +169 dump_file - 91 +91 static.dirs - 23 +23 applet_names 2176 2187 +11 applet_main 1284 1288 +4 applet_nameofs 642 644 +2 ------------------------------------------------------------------------------ (add/remove: 5/0 grow/shrink: 4/0 up/down: 1560/0) Total: 1560 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
fe360480aa
commit
ff027d6f50
@ -83,6 +83,7 @@ IF_BBCONFIG(APPLET(bbconfig, _BB_DIR_BIN, _BB_SUID_DROP))
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//IF_BBSH(APPLET(bbsh, _BB_DIR_BIN, _BB_SUID_DROP))
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IF_BEEP(APPLET(beep, _BB_DIR_USR_BIN, _BB_SUID_DROP))
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IF_BLKID(APPLET(blkid, _BB_DIR_SBIN, _BB_SUID_DROP))
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IF_BOOTCHARTD(APPLET(bootchartd, _BB_DIR_SBIN, _BB_SUID_DROP))
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IF_BRCTL(APPLET(brctl, _BB_DIR_USR_SBIN, _BB_SUID_DROP))
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IF_BUNZIP2(APPLET(bunzip2, _BB_DIR_USR_BIN, _BB_SUID_DROP))
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IF_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, _BB_DIR_USR_BIN, _BB_SUID_DROP, bzcat))
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@ -154,18 +154,15 @@
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"\n -r Repetitions" \
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"\n -n Start new tone" \
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#define fbsplash_trivial_usage \
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"-s IMGFILE [-c] [-d DEV] [-i INIFILE] [-f CMD]"
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#define fbsplash_full_usage "\n\n" \
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"Options:" \
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"\n -s Image" \
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"\n -c Hide cursor" \
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"\n -d Framebuffer device (default /dev/fb0)" \
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"\n -i Config file (var=value):" \
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"\n BAR_LEFT,BAR_TOP,BAR_WIDTH,BAR_HEIGHT" \
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"\n BAR_R,BAR_G,BAR_B" \
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"\n -f Control pipe (else exit after drawing image)" \
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"\n commands: 'NN' (% for progress bar) or 'exit'" \
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#define bootchartd_trivial_usage \
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"start [PROG ARGS]|stop|init"
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#define bootchartd_full_usage "\n\n" \
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"Create /var/log/bootchart.tgz with boot chart data\n" \
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"\nOptions:" \
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"\nstart: start background logging; with PROG, run PROG, then kill logging with USR1" \
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"\nstop: send USR1 to all bootchartd processes" \
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"\ninit: start background logging; stop when getty/xdm is seen (for init scripts)" \
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"\nUnder PID 1: as init, then exec $bootchart_init, /init, /sbin/init" \
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#define brctl_trivial_usage \
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"COMMAND [BRIDGE [INTERFACE]]"
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@ -1174,6 +1171,19 @@
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"$ echo $?\n" \
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"1\n"
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#define fbsplash_trivial_usage \
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"-s IMGFILE [-c] [-d DEV] [-i INIFILE] [-f CMD]"
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#define fbsplash_full_usage "\n\n" \
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"Options:" \
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"\n -s Image" \
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"\n -c Hide cursor" \
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"\n -d Framebuffer device (default /dev/fb0)" \
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"\n -i Config file (var=value):" \
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"\n BAR_LEFT,BAR_TOP,BAR_WIDTH,BAR_HEIGHT" \
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"\n BAR_R,BAR_G,BAR_B" \
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"\n -f Control pipe (else exit after drawing image)" \
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"\n commands: 'NN' (% for progress bar) or 'exit'" \
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#define fbset_trivial_usage \
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"[OPTIONS] [MODE]"
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#define fbset_full_usage "\n\n" \
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@ -120,4 +120,18 @@ config MESG
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Mesg controls access to your terminal by others. It is typically
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used to allow or disallow other users to write to your terminal
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config BOOTCHARTD
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bool "bootchartd"
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default n
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help
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bootchartd is commonly used to profile the boot process
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for the purpose of speeding it up. In this case, it is started
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by the kernel as the init process. This is configured by adding
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the init=/sbin/bootchartd option to the kernel command line.
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It can also be used to monitor the resource usage of a specific
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application or the running system in general. In this case,
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bootchartd is started interactively by running bootchartd start
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and stopped using bootchartd stop.
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endmenu
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@ -8,3 +8,4 @@ lib-y:=
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lib-$(CONFIG_HALT) += halt.o
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lib-$(CONFIG_INIT) += init.o
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lib-$(CONFIG_MESG) += mesg.o
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lib-$(CONFIG_BOOTCHARTD) += bootchartd.o
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355
init/bootchartd.c
Normal file
355
init/bootchartd.c
Normal file
@ -0,0 +1,355 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include <sys/mount.h>
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#ifndef MS_SILENT
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# define MS_SILENT (1 << 15)
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#endif
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#ifndef MNT_DETACH
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# define MNT_DETACH 0x00000002
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#endif
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#define BC_VERSION_STR "0.8"
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/* For debugging, set to 0:
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* strace won't work with DO_SIGNAL_SYNC set to 1.
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*/
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#define DO_SIGNAL_SYNC 1
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//Not supported: $PWD/bootchartd.conf and /etc/bootchartd.conf
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//# tmpfs size
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//# (32 MB should suffice for ~20 minutes worth of log data, but YMMV)
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//TMPFS_SIZE=32m
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//
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//# Sampling period (in seconds)
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//SAMPLE_PERIOD=0.2
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//
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//# Whether to enable and store BSD process accounting information. The
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//# kernel needs to be configured to enable v3 accounting
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//# (CONFIG_BSD_PROCESS_ACCT_V3). accton from the GNU accounting utilities
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//# is also required.
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//PROCESS_ACCOUNTING="no"
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//
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//# Tarball for the various boot log files
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//BOOTLOG_DEST=/var/log/bootchart.tgz
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//
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//# Whether to automatically stop logging as the boot process completes.
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//# The logger will look for known processes that indicate bootup completion
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//# at a specific runlevel (e.g. gdm-binary, mingetty, etc.).
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//AUTO_STOP_LOGGER="yes"
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//
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//# Whether to automatically generate the boot chart once the boot logger
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//# completes. The boot chart will be generated in $AUTO_RENDER_DIR.
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//# Note that the bootchart package must be installed.
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//AUTO_RENDER="no"
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//
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//# Image format to use for the auto-generated boot chart
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//# (choose between png, svg and eps).
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//AUTO_RENDER_FORMAT="png"
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//
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//# Output directory for auto-generated boot charts
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//AUTO_RENDER_DIR="/var/log"
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/* Globals */
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struct globals {
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char jiffy_line[sizeof(bb_common_bufsiz1)];
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} FIX_ALIASING;
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#define G (*(struct globals*)&bb_common_bufsiz1)
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#define INIT_G() do { } while (0)
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static void dump_file(FILE *fp, const char *filename)
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{
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int fd = open(filename, O_RDONLY);
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if (fd >= 0) {
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fputs(G.jiffy_line, fp);
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fflush(fp);
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bb_copyfd_eof(fd, fileno(fp));
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close(fd);
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fputc('\n', fp);
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}
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}
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static int dump_procs(FILE *fp, int look_for_login_process)
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{
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struct dirent *entry;
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DIR *dir = opendir("/proc");
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int found_login_process = 0;
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fputs(G.jiffy_line, fp);
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while ((entry = readdir(dir)) != NULL) {
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char name[sizeof("/proc/%u/cmdline") + sizeof(int)*3];
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int stat_fd;
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unsigned pid = bb_strtou(entry->d_name, NULL, 10);
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if (errno)
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continue;
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/* Android's version reads /proc/PID/cmdline and extracts
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* non-truncated process name. Do we want to do that? */
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sprintf(name, "/proc/%u/stat", pid);
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stat_fd = open(name, O_RDONLY);
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if (stat_fd >= 0) {
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char *p;
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char stat_line[4*1024];
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int rd = safe_read(stat_fd, stat_line, sizeof(stat_line)-2);
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close(stat_fd);
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if (rd < 0)
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continue;
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stat_line[rd] = '\0';
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p = strchrnul(stat_line, '\n');
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*p++ = '\n';
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*p = '\0';
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fputs(stat_line, fp);
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if (!look_for_login_process)
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continue;
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p = strchr(stat_line, '(');
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if (!p)
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continue;
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p++;
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strchrnul(p, ')')[0] = '\0';
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/* If is gdm, kdm or a getty? */
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if (((p[0] == 'g' || p[0] == 'k' || p[0] == 'x') && p[1] == 'd' && p[2] == 'm')
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|| strstr(p, "getty")
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) {
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found_login_process = 1;
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}
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}
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}
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closedir(dir);
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fputc('\n', fp);
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return found_login_process;
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}
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static char *make_tempdir(const char *prog)
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{
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char template[] = "/tmp/bootchart.XXXXXX";
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char *tempdir = xstrdup(mkdtemp(template));
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if (!tempdir) {
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/* /tmp is not writable (happens when we are used as init).
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* Try to mount a tmpfs, them cd and lazily unmount it.
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* Since we unmount it at once, we can mount it anywhere.
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* Try a few locations which are likely ti exist.
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*/
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static const char dirs[] = "/mnt\0""/tmp\0""/boot\0""/proc\0";
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const char *try_dir = dirs;
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while (mount("none", try_dir, "tmpfs", MS_SILENT, "size=16m") != 0) {
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try_dir += strlen(try_dir) + 1;
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if (!try_dir[0])
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bb_perror_msg_and_die("can't %smount tmpfs", "");
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}
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//bb_error_msg("mounted tmpfs on %s", try_dir);
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xchdir(try_dir);
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if (umount2(try_dir, MNT_DETACH) != 0) {
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bb_perror_msg_and_die("can't %smount tmpfs", "un");
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}
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} else {
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xchdir(tempdir);
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}
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{
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FILE *header_fp = xfopen("header", "w");
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if (prog)
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fprintf(header_fp, "profile.process = %s\n", prog);
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fputs("version = "BC_VERSION_STR"\n", header_fp);
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fclose(header_fp);
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}
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return tempdir;
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}
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static void do_logging(void)
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{
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//# Enable process accounting if configured
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//if [ "$PROCESS_ACCOUNTING" = "yes" ]; then
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// [ -e kernel_pacct ] || : > kernel_pacct
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// accton kernel_pacct
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//fi
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FILE *proc_stat = xfopen("proc_stat.log", "w");
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FILE *proc_diskstats = xfopen("proc_diskstats.log", "w");
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//FILE *proc_netdev = xfopen("proc_netdev.log", "w");
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FILE *proc_ps = xfopen("proc_ps.log", "w");
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int look_for_login_process = (getppid() == 1);
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unsigned count = 60*1000*1000 / 200*1000; /* ~1 minute */
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while (--count && !bb_got_signal) {
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char *p;
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int len = open_read_close("/proc/uptime", G.jiffy_line, sizeof(G.jiffy_line)-2);
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if (len < 0)
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goto wait_more;
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/* /proc/uptime has format "NNNNNN.MM NNNNNNN.MM" */
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/* we convert it to "NNNNNNMM\n" (using first value) */
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G.jiffy_line[len] = '\0';
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p = strchr(G.jiffy_line, '.');
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if (!p)
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goto wait_more;
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while (isdigit(*++p))
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p[-1] = *p;
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p[-1] = '\n';
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p[0] = '\0';
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dump_file(proc_stat, "/proc/stat");
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dump_file(proc_diskstats, "/proc/diskstats");
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//dump_file(proc_netdev, "/proc/net/dev");
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if (dump_procs(proc_ps, look_for_login_process)) {
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/* dump_procs saw a getty or {g,k,x}dm
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* stop logging in 2 seconds:
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*/
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if (count > 2*1000*1000 / 200*1000)
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count = 2*1000*1000 / 200*1000;
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}
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fflush_all();
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wait_more:
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usleep(200*1000);
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}
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// [ -e kernel_pacct ] && accton off
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}
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static void finalize(char *tempdir)
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{
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//# Stop process accounting if configured
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//local pacct=
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//[ -e kernel_pacct ] && pacct=kernel_pacct
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//(
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// echo "version = $VERSION"
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// echo "title = Boot chart for $( hostname | sed q ) ($( date ))"
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// echo "system.uname = $( uname -srvm | sed q )"
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// echo "system.release = $( sed q /etc/SuSE-release )"
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// echo "system.cpu = $( grep '^model name' /proc/cpuinfo | sed q ) ($cpucount)"
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// echo "system.kernel.options = $( sed q /proc/cmdline )"
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//) >> header
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/* Package log files */
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system("tar -zcf /var/log/bootchart.tgz header *.log"); // + $pacct
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/* Clean up (if we are not in detached tmpfs) */
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if (tempdir) {
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unlink("header");
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unlink("proc_stat.log");
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unlink("proc_diskstats.log");
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//unlink("proc_netdev.log");
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unlink("proc_ps.log");
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rmdir(tempdir);
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}
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/* shell-based bootchartd tries to run /usr/bin/bootchart if $AUTO_RENDER=yes:
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* /usr/bin/bootchart -o "$AUTO_RENDER_DIR" -f $AUTO_RENDER_FORMAT "$BOOTLOG_DEST"
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*/
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}
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/* Usage:
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* bootchartd start [PROG ARGS]: start logging in background, USR1 stops it.
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* With PROG, runs PROG, then kills background logging.
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* bootchartd stop: same as "killall -USR1 bootchartd"
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* bootchartd init: start logging in background
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* Stop when getty/gdm is seen (if AUTO_STOP_LOGGER = yes).
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* Meant to be used from init scripts.
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* bootchartd (pid==1): as init, but then execs $bootchart_init, /init, /sbin/init
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* Meant to be used as kernel's init process.
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*/
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int bootchartd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int bootchartd_main(int argc UNUSED_PARAM, char **argv)
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{
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pid_t parent_pid, logger_pid;
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smallint cmd;
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enum {
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CMD_STOP = 0,
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CMD_START,
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CMD_INIT,
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CMD_PID1, /* used to mark pid 1 case */
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};
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INIT_G();
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parent_pid = getpid();
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if (argv[1]) {
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cmd = index_in_strings("stop\0""start\0""init\0", argv[1]);
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if (cmd < 0)
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bb_show_usage();
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if (cmd == CMD_STOP) {
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pid_t *pidList = find_pid_by_name("bootchartd");
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while (*pidList != 0) {
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if (*pidList != parent_pid)
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kill(*pidList, SIGUSR1);
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pidList++;
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}
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return EXIT_SUCCESS;
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}
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} else {
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if (parent_pid != 1)
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bb_show_usage();
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cmd = CMD_PID1;
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}
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/* Here we are in START or INIT state. Create logger child: */
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logger_pid = fork_or_rexec(argv);
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if (logger_pid == 0) { /* child */
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char *tempdir;
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bb_signals(0
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+ (1 << SIGUSR1)
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+ (1 << SIGUSR2)
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+ (1 << SIGTERM)
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+ (1 << SIGQUIT)
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+ (1 << SIGINT)
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+ (1 << SIGHUP)
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, record_signo);
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if (DO_SIGNAL_SYNC)
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/* Inform parent that we are ready */
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raise(SIGSTOP);
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/* If we started by kernel, PATH might be not set.
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* And in order to run tar we may need PATH to be set:
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*/
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if (cmd == CMD_PID1 && !getenv("PATH"))
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putenv((char*)bb_PATH_root_path);
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tempdir = make_tempdir(cmd == CMD_START ? argv[2] : NULL);
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do_logging();
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finalize(tempdir);
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return EXIT_SUCCESS;
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}
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/* parent */
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if (DO_SIGNAL_SYNC) {
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/* Wait for logger child to set handlers, then unpause it.
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* Otherwise with short-lived PROG (e.g. "bootchartd start true")
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* we might send SIGUSR1 before logger sets its handler.
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*/
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waitpid(logger_pid, NULL, WUNTRACED);
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kill(logger_pid, SIGCONT);
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}
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if (cmd == CMD_PID1) {
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char *bootchart_init = getenv("bootchart_init");
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if (bootchart_init)
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execl(bootchart_init, bootchart_init, NULL);
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execl("/init", "init", NULL);
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execl("/sbin/init", "init", NULL);
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bb_perror_msg_and_die("can't exec '%s'", "/sbin/init");
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||||
}
|
||||
|
||||
if (cmd == CMD_START && argv[2]) { /* "start PROG ARGS" */
|
||||
pid_t pid = vfork();
|
||||
if (pid < 0)
|
||||
bb_perror_msg_and_die("vfork");
|
||||
if (pid == 0) { /* child */
|
||||
argv += 2;
|
||||
execvp(argv[0], argv);
|
||||
bb_perror_msg_and_die("can't exec '%s'", argv[0]);
|
||||
}
|
||||
/* parent */
|
||||
waitpid(pid, NULL, 0);
|
||||
kill(logger_pid, SIGUSR1);
|
||||
}
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user