diff options
Diffstat (limited to 'init/bootchartd.c')
| -rw-r--r-- | init/bootchartd.c | 154 |
1 files changed, 125 insertions, 29 deletions
diff --git a/init/bootchartd.c b/init/bootchartd.c index d1f9ed3..1ed4f99 100644 --- a/init/bootchartd.c +++ b/init/bootchartd.c @@ -2,7 +2,58 @@ /* * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ + +//config:config BOOTCHARTD +//config: bool "bootchartd" +//config: default y +//config: help +//config: bootchartd is commonly used to profile the boot process +//config: for the purpose of speeding it up. In this case, it is started +//config: by the kernel as the init process. This is configured by adding +//config: the init=/sbin/bootchartd option to the kernel command line. +//config: +//config: It can also be used to monitor the resource usage of a specific +//config: application or the running system in general. In this case, +//config: bootchartd is started interactively by running bootchartd start +//config: and stopped using bootchartd stop. +//config: +//config:config FEATURE_BOOTCHARTD_BLOATED_HEADER +//config: bool "bootchartd" +//config: default y +//config: depends on BOOTCHARTD +//config: help +//config: Create extended header file compatible with "big" bootchartd. +//config: "Big" bootchartd is a shell script and it dumps some +//config: "convenient" info int the header, such as: +//config: title = Boot chart for `hostname` (`date`) +//config: system.uname = `uname -srvm` +//config: system.release = `cat /etc/DISTRO-release` +//config: system.cpu = `grep '^model name' /proc/cpuinfo | head -1` ($cpucount) +//config: system.kernel.options = `cat /proc/cmdline` +//config: This data is not mandatory for bootchart graph generation, +//config: and is considered bloat. Nevertheless, this option +//config: makes bootchartd applet to dump a subset of it. +//config: +//config:config FEATURE_BOOTCHARTD_CONFIG_FILE +//config: bool "bootchartd" +//config: default y +//config: depends on BOOTCHARTD +//config: help +//config: Create extended header file compatible with "big" bootchartd. +//config: "Big" bootchartd is a shell script and it dumps some +//config: "convenient" info int the header, such as: +//config: title = Boot chart for `hostname` (`date`) +//config: system.uname = `uname -srvm` +//config: system.release = `cat /etc/DISTRO-release` +//config: system.cpu = `grep '^model name' /proc/cpuinfo | head -1` ($cpucount) +//config: system.kernel.options = `cat /proc/cmdline` +//config: This data is not mandatory for bootchart graph generation, +//config: and is considered bloat. Nevertheless, this option +//config: makes bootchartd applet to dump a subset of it. + #include "libbb.h" +/* After libbb.h, since it needs sys/types.h on some systems */ +#include <sys/utsname.h> #include <sys/mount.h> #ifndef MS_SILENT # define MS_SILENT (1 << 15) @@ -19,15 +70,16 @@ #define DO_SIGNAL_SYNC 1 -//Not supported: $PWD/bootchartd.conf and /etc/bootchartd.conf - +//$PWD/bootchartd.conf and /etc/bootchartd.conf: +//supported options: +//# Sampling period (in seconds) +//SAMPLE_PERIOD=0.2 +// +//not yet supported: //# tmpfs size //# (32 MB should suffice for ~20 minutes worth of log data, but YMMV) //TMPFS_SIZE=32m // -//# Sampling period (in seconds) -//SAMPLE_PERIOD=0.2 -// //# Whether to enable and store BSD process accounting information. The //# kernel needs to be configured to enable v3 accounting //# (CONFIG_BSD_PROCESS_ACCT_V3). accton from the GNU accounting utilities @@ -126,7 +178,7 @@ static int dump_procs(FILE *fp, int look_for_login_process) return found_login_process; } -static char *make_tempdir(const char *prog) +static char *make_tempdir(void) { char template[] = "/tmp/bootchart.XXXXXX"; char *tempdir = xstrdup(mkdtemp(template)); @@ -151,18 +203,10 @@ static char *make_tempdir(const char *prog) } else { xchdir(tempdir); } - { - FILE *header_fp = xfopen("header", "w"); - if (prog) - fprintf(header_fp, "profile.process = %s\n", prog); - fputs("version = "BC_VERSION_STR"\n", header_fp); - fclose(header_fp); - } - return tempdir; } -static void do_logging(void) +static void do_logging(int sample_pariod_us) { //# Enable process accounting if configured //if [ "$PROCESS_ACCOUNTING" = "yes" ]; then @@ -205,26 +249,61 @@ static void do_logging(void) } fflush_all(); wait_more: - usleep(200*1000); + usleep(sample_pariod_us); } // [ -e kernel_pacct ] && accton off } -static void finalize(char *tempdir) +static void finalize(char *tempdir, const char *prog) { //# Stop process accounting if configured //local pacct= //[ -e kernel_pacct ] && pacct=kernel_pacct - //( - // echo "version = $VERSION" - // echo "title = Boot chart for $( hostname | sed q ) ($( date ))" - // echo "system.uname = $( uname -srvm | sed q )" - // echo "system.release = $( sed q /etc/SuSE-release )" - // echo "system.cpu = $( grep '^model name' /proc/cpuinfo | sed q ) ($cpucount)" - // echo "system.kernel.options = $( sed q /proc/cmdline )" - //) >> header + FILE *header_fp = xfopen("header", "w"); + + if (prog) + fprintf(header_fp, "profile.process = %s\n", prog); + + fputs("version = "BC_VERSION_STR"\n", header_fp); + + if (ENABLE_FEATURE_BOOTCHARTD_BLOATED_HEADER) { + char *hostname; + char *kcmdline; + time_t t; + struct tm tm_time; + /* x2 for possible localized data */ + char date_buf[sizeof("Mon Jun 21 05:29:03 CEST 2010") * 2]; + struct utsname unamebuf; + + hostname = safe_gethostname(); + time(&t); + localtime_r(&t, &tm_time); + strftime(date_buf, sizeof(date_buf), "%a %b %e %H:%M:%S %Z %Y", &tm_time); + fprintf(header_fp, "title = Boot chart for %s (%s)\n", hostname, date_buf); + if (ENABLE_FEATURE_CLEAN_UP) + free(hostname); + + uname(&unamebuf); /* never fails */ + /* same as uname -srvm */ + fprintf(header_fp, "system.uname = %s %s %s %s\n", + unamebuf.sysname, + unamebuf.release, + unamebuf.version, + unamebuf.machine + ); + + //system.release = `cat /etc/DISTRO-release` + //system.cpu = `grep '^model name' /proc/cpuinfo | head -1` ($cpucount) + + kcmdline = xmalloc_open_read_close("/proc/cmdline", NULL); + /* kcmdline includes trailing "\n" */ + fprintf(header_fp, "system.kernel.options = %s", kcmdline); + if (ENABLE_FEATURE_CLEAN_UP) + free(kcmdline); + } + fclose(header_fp); /* Package log files */ system("tar -zcf /var/log/bootchart.tgz header *.log"); // + $pacct @@ -256,6 +335,7 @@ static void finalize(char *tempdir) int bootchartd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int bootchartd_main(int argc UNUSED_PARAM, char **argv) { + int sample_pariod_us; pid_t parent_pid, logger_pid; smallint cmd; enum { @@ -287,7 +367,23 @@ int bootchartd_main(int argc UNUSED_PARAM, char **argv) cmd = CMD_PID1; } - /* Here we are in START or INIT state. Create logger child: */ + /* Here we are in START or INIT state */ + + /* Read config file: */ + sample_pariod_us = 200 * 1000; + if (ENABLE_FEATURE_BOOTCHARTD_CONFIG_FILE) { + char* token[2]; + parser_t *parser = config_open2("/etc/bootchartd.conf" + 5, fopen_for_read); + if (!parser) + parser = config_open2("/etc/bootchartd.conf", fopen_for_read); + while (config_read(parser, token, 2, 0, "#=", PARSE_NORMAL & ~PARSE_COLLAPSE)) { + if (strcmp(token[0], "SAMPLE_PERIOD") == 0 && token[1]) + sample_pariod_us = atof(token[1]) * 1000000; + } + config_close(parser); + } + + /* Create logger child: */ logger_pid = fork_or_rexec(argv); if (logger_pid == 0) { /* child */ @@ -312,9 +408,9 @@ int bootchartd_main(int argc UNUSED_PARAM, char **argv) if (cmd == CMD_PID1 && !getenv("PATH")) putenv((char*)bb_PATH_root_path); - tempdir = make_tempdir(cmd == CMD_START ? argv[2] : NULL); - do_logging(); - finalize(tempdir); + tempdir = make_tempdir(); + do_logging(sample_pariod_us); + finalize(tempdir, cmd == CMD_START ? argv[2] : NULL); return EXIT_SUCCESS; } |