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bootchart: merge bootchart 

Bootchart is renamed to 'systemd-bootchart' and installed as
/usr/lib/systemd/systemd-bootchart. The configuration file
will reside in /etc/systemd/bootchart.conf.
This commit is contained in:
Auke Kok 2012-10-17 16:01:12 -07:00 committed by Kay Sievers
parent d0100018c2
commit 83fdc450aa
10 changed files with 2412 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Makefile.am
View File

@ -3019,6 +3019,22 @@ EXTRA_DIST += \
units/systemd-readahead-replay.service.in \
units/systemd-readahead-done.service.in
# ------------------------------------------------------------------------------
if ENABLE_BOOTCHART
systemd_bootchart_SOURCES = \
src/bootchart/bootchart.c \
src/bootchart/bootchart.h \
src/bootchart/log.c \
src/bootchart/svg.c
MANPAGES += \
man/systemd-bootchart.1
man/bootchart.conf.5
rootlibexec_PROGRAMS += \
systemd-bootchart
endif
# ------------------------------------------------------------------------------
if ENABLE_QUOTACHECK
rootlibexec_PROGRAMS += \

9
configure.ac
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@ -557,6 +557,14 @@ if test "x$enable_readahead" != "xno"; then
fi
AM_CONDITIONAL(ENABLE_READAHEAD, [test "$have_readahead" = "yes"])
# ------------------------------------------------------------------------------
have_bootchart=no
AC_ARG_ENABLE(bootchart, AS_HELP_STRING([--disable-bootchart], [disable bootchart tool]))
if test "x$enable_bootchart" != "xno"; then
have_bootchart=yes
fi
AM_CONDITIONAL(ENABLE_BOOTCHART, [test "$have_bootchart" = "yes"])
# ------------------------------------------------------------------------------
have_quotacheck=no
AC_ARG_ENABLE(quotacheck, AS_HELP_STRING([--disable-quotacheck], [disable quotacheck tools]))
@ -845,6 +853,7 @@ AC_MSG_RESULT([
binfmt: ${have_binfmt}
vconsole: ${have_vconsole}
readahead: ${have_readahead}
bootchart: ${have_bootchart}
quotacheck: ${have_quotacheck}
randomseed: ${have_randomseed}
logind: ${have_logind}

158
man/bootchart.conf.xml Normal file
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@ -0,0 +1,158 @@
<?xml version='1.0'?> <!--*-nxml-*-->
<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 2012 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/>.
-->
<refentry id="bootchart.conf">
<refentryinfo>
<title>bootchart.conf</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Auke</firstname>
<surname>Kok</surname>
<email>auke-jan.h.kok@intel.com</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>bootchart.conf</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>bootchart.conf</refname>
<refpurpose>Boot performance analysis graphing tool configuration file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/etc/systemd/bootchart.conf</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>When starting, systemd-bootchart will read the
configuration file <filename>bootchart.conf</filename>.
This configuration file determines logging parameters and
graph output.</para>
</refsect1>
<refsect1>
<title>Options</title>
<variablelist class='bootchart-directives'>
<varlistentry>
<term><varname>samples=500</varname></term>
<listitem><para>Configure the amount of samples to
record total before bootchart exits. Each sample will
record at intervals defined by freq=.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>freq=25</varname></term>
<listitem><para>Configure the sample log frequency.
This can be a fractional number, but must be larger than
0.0. Most systems can cope with values under 25-50 without
impacting boot time severely.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>rel=0</varname></term>
<listitem><para>Configures whether the left axis of the
output graph equals time=0.0 (CLOCK_MONOTONIC start). This
is useful for using bootchart at post-boot time to profile
an already booted system, otherwise the graph would become
extremely large. If set to a non-zero value, the horizontal
axis starts at the first recorded sample instead of time=0.0.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>filter=0</varname></term>
<listitem><para>Configures whether the resulting graph
should omit tasks that did not contribute significantly
to the boot. Processes that are too short-lived (only
seen in one sample) or that do not consume any significant
CPU time (less than 0.001sec) will not be displayed in
the output graph.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>output=[path]</varname></term>
<listitem><para>Configures the output folder for writing
the graphs. By default, bootchart writes the graphs to
<filename>/var/log</filename>.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>init=[path]</varname></term>
<listitem><para>Configures bootchart to run a non-standard
binary instead of <filename>/sbin/init</filename>. This
option is only relevant if bootchart was invoked from the
kernel command line with
init=/usr/lib/systemd/systemd-bootchart.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>pss=0</varname></term>
<listitem><para>If set to 1, enables logging and graphing
of processes PSS memory consumption.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>entropy=0</varname></term>
<listitem><para>If set to 1, enables logging and graphing
of the kernel random entropy pool size.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>scale_x=100</varname></term>
<listitem><para>Horizontal scaling factor for all variable
graph components.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>scale_y=20</varname></term>
<listitem><para>Vertical scaling factor for all variable
graph components.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd-bootchart</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>

117
man/systemd-bootchart.xml Normal file
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@ -0,0 +1,117 @@
<?xml version='1.0'?> <!--*-nxml-*-->
<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 2012 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/>.
-->
<refentry id="systemd-bootchart">
<refentryinfo>
<title>systemd-bootchart</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Auke</firstname>
<surname>Kok</surname>
<email>auke-jan.h.kok@intel.com</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-bootchart</refentrytitle>
<manvolnum>1</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-bootchart</refname>
<refpurpose>Boot performance analysis graphing tool</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>Systemd-bootchart is an boot time analysis tool. It represents
various aspects of the system as graph elements. These graph
elements allow the user to determine resource usage, efficiency
and performance issues.</para>
</refsect1>
<refsect1>
<title>Invocation</title>
<para>systemd-bootchart can be invoked in several different ways:</para>
<variablelist class='bootchart-invocation'>
<varlistentry>
<title>Kernel invocation</title>
<listitem><para>The kernel can invoke systemd-bootchart
instead of the init process. In itself, systemd-bootchart
will invoke <filename>/sbin/init</filename> if invoked in
this matter.</para></listitem>
</varlistentry>
<varlistentry>
<title>Started as a standalone program</title>
<listitem><para>One can execute systemd-bootchart as
normal application from the commandline. In this mode
it is highly recommended to pass the "-r" flag in order
to not graph the time elapsed since boot and before
systemd-bootchart was started, as it may result in
extremely large graphs.
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Options</title>
<para>Please read systemd-bootchart --help or the bootchart.conf manual
page for information about the various options that influence how
systemd-bootchart operates.</para>
</refsect1>
<refsect1>
<title>Output</title>
<para>Systemd-bootchart generates SVG graphs. In order to render these
on a graphica display any SVG capable viewer can be used. It should be
noted that the SVG render engines in most browsers (including Chrome
and Firefox) are many times faster than dedicated graphical applications
like Gimp and Inkscape. Just point your browser at "file:///var/log"!
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>bootchart.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>

83
src/bootchart/README Normal file
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@ -0,0 +1,83 @@
Bootchart - a 'startup' graphing tool
--
Bootchart is a tool, usually run at system startup, that collects and graphs
the CPU and disk load of the system as it works. The output of bootchart is
an SVG graph. Normally, bootchart is invoked as `bootchartd` by the kernel
by passing "init=/sbin/bootchartd" to the kernel. Bootchart will then fork
init off to resume normal system startup, while monitoring and logging
startup information in the background.
After collecting a certain amount of data (usually 15-30 seconds) the logging
stops and a graph is generated from the logged information. This graph
contains vital clues to which resources are being used, in which order, and
where possible problems exist in the startup sequence of the system.
Of course, bootchart can also be used at any moment in time to collect and
graph some data for an amount of time. Bootchart does not even require root
privileges to do so, and will happily run as a normal user. Bootchart graphs
are by default written time-stamped in /var/log.
--
This version of bootchart was implemented from scratch and inspired by former
incantations of bootchart:
- The original bash/shell code implemented bootchart. This version logged all
data into a compressed tarball for later processing, and did not create a graph
on it's own.
- The C-code implementation found in Ubuntu. This version replaced above shell
code version with a faster and efficient data logger, but still did not graph
code itself.
- the original Java-based bootchart, the original graphing program that created
a bootchart graph from logged data.
- the pybootchartgui.py program, which created a graph based on the data logged
by either standalone data logger.
The version you are looking at combines these 2 parts into a single program,
which makes running it and creating graphs a bit more efficient and simple.
You can now run a single program at startup instead of 2. There are no timing
problems (the graphing stage will never run if the logging stage didn't
finish). The logged data isn't being written to disc first, then read again.
Also, the data kept in memory is reduced to the absolute minimum needed to
keep memory use low.
--
Requirements: glibc. Your kernel must have procfs support and several
proc output options enabled:
CONFIG_PROC_FS
CONFIG_SCHEDSTATS
CONFIG_SCHED_DEBUG
at a minimum. bootchartd itself does not require any graphics library
to generate the SVG output file.
--
Configuration: please see bootchartd --help, as well as /etc/bootchartd.conf
and/or /usr/share/doc/bootchart/bootchartd.conf.example for a list of
configurable options.
--
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
--
For bugs, please contact the author or current maintainer:
Auke Kok <auke-jan.h.kok@intel.com>
--
Download bootchart releases here: http://foo-projects.org/~sofar/bootchart/
Source code is hosted here: git://github.com/sofar/bootchart

352
src/bootchart/bootchart.c Normal file
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@ -0,0 +1,352 @@
/*
* bootchart.c
*
* Copyright (C) 2009-2012 Intel Coproration
*
* Authors:
* Auke Kok <auke-jan.h.kok@intel.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2
* of the License.
*/
#include <sys/time.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <getopt.h>
#include <limits.h>
#include <errno.h>
#include "bootchart.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;
int overrun = 0;
static int exiting = 0;
/* graph defaults */
int entropy = 0;
int initcall = 1;
int relative;
int filter = 1;
int pss = 0;
int samples;
int 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] = "/var/log";
static struct rlimit rlim;
static void signal_handler(int sig)
{
if (sig++)
sig--;
exiting = 1;
}
int main(int argc, char *argv[])
{
struct sigaction sig;
struct ps_struct *ps;
char output_file[PATH_MAX];
char datestr[200];
time_t t;
FILE *f;
int gind;
int i;
memset(&t, 0, sizeof(time_t));
rlim.rlim_cur = 4096;
rlim.rlim_max = 4096;
(void) setrlimit(RLIMIT_NOFILE, &rlim);
f = fopen("/etc/systemd/bootchart.conf", "r");
if (f) {
char buf[256];
char *key;
char *val;
while (fgets(buf, 80, f) != NULL) {
char *c;
c = strchr(buf, '\n');
if (c) *c = 0; /* remove trailing \n */
if (buf[0] == '#')
continue; /* comment line */
key = strtok(buf, "=");
if (!key)
continue;
val = strtok(NULL, "=");
if (!val)
continue;
// todo: filter leading/trailing whitespace
if (!strcmp(key, "samples"))
len = atoi(val);
if (!strcmp(key, "freq"))
hz = atof(val);
if (!strcmp(key, "rel"))
relative = atoi(val);
if (!strcmp(key, "filter"))
filter = atoi(val);
if (!strcmp(key, "pss"))
pss = atoi(val);
if (!strcmp(key, "output"))
strncpy(output_path, val, PATH_MAX - 1);
if (!strcmp(key, "init"))
strncpy(init_path, val, PATH_MAX - 1);
if (!strcmp(key, "scale_x"))
scale_x = atof(val);
if (!strcmp(key, "scale_y"))
scale_y = atof(val);
if (!strcmp(key, "entropy"))
entropy = atoi(val);
}
fclose(f);
}
while (1) {
static struct option opts[] = {
{"rel", 0, NULL, 'r'},
{"freq", 1, NULL, 'f'},
{"samples", 1, NULL, 'n'},
{"pss", 0, NULL, 'p'},
{"output", 1, NULL, 'o'},
{"init", 1, NULL, 'i'},
{"filter", 0, NULL, 'F'},
{"help", 0, NULL, 'h'},
{"scale-x", 1, NULL, 'x'},
{"scale-y", 1, NULL, 'y'},
{"entropy", 0, NULL, 'e'},
{NULL, 0, NULL, 0}
};
gind = 0;
i = getopt_long(argc, argv, "erpf:n:o:i:Fhx:y:", opts, &gind);
if (i == -1)
break;
switch (i) {
case 'r':
relative = 1;
break;
case 'f':
hz = atof(optarg);
break;
case 'F':
filter = 0;
break;
case 'n':
len = atoi(optarg);
break;
case 'o':
strncpy(output_path, optarg, PATH_MAX - 1);
break;
case 'i':
strncpy(init_path, optarg, PATH_MAX - 1);
break;
case 'p':
pss = 1;
break;
case 'x':
scale_x = atof(optarg);
break;
case 'y':
scale_y = atof(optarg);
break;
case 'e':
entropy = 1;
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 N Sample frequency [%f]\n", hz);
fprintf(stderr, " --samples, -n N Stop sampling at [%d] samples\n", 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, " --filter, -F Disable filtering of processes from the graph\n");
fprintf(stderr, " that are of less importance or short-lived\n");
fprintf(stderr, " --help, -h Display this message\n");
fprintf(stderr, "See the installed README and bootchartd.conf.example for more information.\n");
exit (EXIT_SUCCESS);
break;
default:
break;
}
}
if (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=/sbin/bootchartd, 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);
}
}
/* start with empty ps LL */
ps_first = malloc(sizeof(struct ps_struct));
if (!ps_first) {
perror("malloc(ps_struct)");
exit(EXIT_FAILURE);
}
memset(ps_first, 0, sizeof(struct ps_struct));
/* 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();
/* 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 */
len = len + ((int)(newint_ns / interval));
}
samples++;
if (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);
}
closedir(proc);
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) {
perror("open output_file");
exit (EXIT_FAILURE);
}
svg_do();
fprintf(stderr, "bootchartd: Wrote %s\n", output_file);
fclose(of);
/* 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, "bootchartd: Warning: sample time overrun %i times\n", overrun);
return 0;
}

20
src/bootchart/bootchart.conf Normal file
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@ -0,0 +1,20 @@
# This file is part of systemd.
#
# 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.
#
# See systemd-bootchart.conf(5) for details
#samples=500
#freq=25
#rel=0
#filter=1
#output=<folder name, defaults to /var/log>
#init=/path/to/init-binary
#pss=0
#entropy=0
#scale_x=100
#scale_y=20

117
src/bootchart/bootchart.h Normal file
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/*
* bootchart.h
*
* Copyright (C) 2009-2012 Intel Coproration
*
* Authors:
* Auke Kok <auke-jan.h.kok@intel.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2
* of the License.
*/
#include <dirent.h>
#define MAXCPUS 16
#define MAXPIDS 65535
#define MAXSAMPLES 8192
struct block_stat_struct {
/* /proc/vmstat pgpgin & pgpgout */
int bi;
int bo;
};
struct cpu_stat_sample_struct {
/* /proc/schedstat fields 10 & 11 (after name) */
double runtime;
double waittime;
};
struct cpu_stat_struct {
/* per cpu array */
struct cpu_stat_sample_struct sample[MAXSAMPLES];
};
/* per process, per sample data we will log */
struct ps_sched_struct {
/* /proc/<n>/schedstat fields 1 & 2 */
double runtime;
double waittime;
int pss;
};
/* process info */
struct ps_struct {
struct ps_struct *next_ps; /* SLL pointer */
struct ps_struct *parent; /* ppid ref */
struct ps_struct *children; /* children */
struct ps_struct *next; /* siblings */
/* must match - otherwise it's a new process with same PID */
char name[16];
int pid;
int ppid;
/* cache fd's */
int sched;
int schedstat;
FILE *smaps;
/* index to first/last seen timestamps */
int first;
int last;
/* records actual start time, may be way before bootchart runs */
double starttime;
/* record human readable total cpu time */
double total;
/* largest PSS size found */
int pss_max;
/* for drawing connection lines later */
double pos_x;
double pos_y;
struct ps_sched_struct *sample;
};
extern int entropy_avail[];
extern double graph_start;
extern double log_start;
extern double sampletime[];
extern struct ps_struct *ps_first;
extern struct block_stat_struct blockstat[];
extern struct cpu_stat_struct cpustat[];
extern int pscount;
extern int relative;
extern int filter;
extern int pss;
extern int entropy;
extern int initcall;
extern int samples;
extern int cpus;
extern int len;
extern double hz;
extern double scale_x;
extern double scale_y;
extern int overrun;
extern double interval;
extern char output_path[PATH_MAX];
extern char init_path[PATH_MAX];
extern FILE *of;
extern DIR *proc;
extern double gettime_ns(void);
extern void log_uptime(void);
extern void log_sample(int sample);
extern void svg_do(void);

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/*
* log.c
*
* Copyright (C) 2009-2012 Intel Coproration
*
* Authors:
* Auke Kok <auke-jan.h.kok@intel.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2
* of the License.
*/
#define _GNU_SOURCE 1
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include <dirent.h>
#include <fcntl.h>
#include <time.h>
#include "bootchart.h"
/*
* Alloc a static 4k buffer for stdio - primarily used to increase
* PSS buffering from the default 1k stdin buffer to reduce
* read() overhead.
*/
static char smaps_buf[4096];
DIR *proc;
double gettime_ns(void)
{
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
return (now.tv_sec + (now.tv_nsec / 1000000000.0));
}
void log_uptime(void)
{
FILE *f;
char str[32];
double uptime;
f = fopen("/proc/uptime", "r");
if (!f)
return;
if (!fscanf(f, "%s %*s", str)) {
fclose(f);
return;
}
fclose(f);
uptime = strtod(str, NULL);
log_start = gettime_ns();
/* start graph at kernel boot time */
if (relative)
graph_start = log_start;
else
graph_start = log_start - uptime;
}
static char *bufgetline(char *buf)
{
char *c;
if (!buf)
return NULL;
c = strchr(buf, '\n');
if (c)
c++;
return c;
}
void log_sample(int sample)
{
static int vmstat;
static int schedstat;
FILE *st;
char buf[4095];
char key[256];
char val[256];
char rt[256];
char wt[256];
char *m;
int c;
int p;
int mod;
static int e_fd;
ssize_t s;
ssize_t n;
struct dirent *ent;
if (!vmstat) {
/* block stuff */
vmstat = open("/proc/vmstat", O_RDONLY);
if (vmstat == -1) {
perror("open /proc/vmstat");
exit (EXIT_FAILURE);
}
}
n = pread(vmstat, buf, sizeof(buf) - 1, 0);
if (n <= 0) {
close(vmstat);
return;
}
buf[n] = '\0';
m = buf;
while (m) {
if (sscanf(m, "%s %s", key, val) < 2)
goto vmstat_next;
if (!strcmp(key, "pgpgin"))
blockstat[sample].bi = atoi(val);
if (!strcmp(key, "pgpgout")) {
blockstat[sample].bo = atoi(val);
break;
}
vmstat_next:
m = bufgetline(m);
if (!m)
break;
}
if (!schedstat) {
/* overall CPU utilization */
schedstat = open("/proc/schedstat", O_RDONLY);
if (schedstat == -1) {
perror("open /proc/schedstat");
exit (EXIT_FAILURE);
}
}
n = pread(schedstat, buf, sizeof(buf) - 1, 0);
if (n <= 0) {
close(schedstat);
return;
}
buf[n] = '\0';
m = buf;
while (m) {
if (sscanf(m, "%s %*s %*s %*s %*s %*s %*s %s %s", key, rt, wt) < 3)
goto schedstat_next;
if (strstr(key, "cpu")) {
c = atoi((const char*)(key+3));
if (c > MAXCPUS)
/* Oops, we only have room for MAXCPUS data */
break;
cpustat[c].sample[sample].runtime = atoll(rt);
cpustat[c].sample[sample].waittime = atoll(wt);
if (c == cpus)
cpus = c + 1;
}
schedstat_next:
m = bufgetline(m);
if (!m)
break;
}
if (entropy) {
if (!e_fd) {
e_fd = open("/proc/sys/kernel/random/entropy_avail", O_RDONLY);
}
if (e_fd) {
n = pread(e_fd, buf, sizeof(buf) - 1, 0);
if (n > 0)
entropy_avail[sample] = atoi(buf);
}
}
/* all the per-process stuff goes here */
if (!proc) {
/* find all processes */
proc = opendir("/proc");
if (!proc)
return;
} else {
rewinddir(proc);
}
while ((ent = readdir(proc)) != NULL) {
char filename[PATH_MAX];
int pid;
struct ps_struct *ps;
if ((ent->d_name[0] < '0') || (ent->d_name[0] > '9'))
continue;
pid = atoi(ent->d_name);
if (pid >= MAXPIDS)
continue;
ps = ps_first;
while (ps->next_ps) {
ps = ps->next_ps;
if (ps->pid == pid)
break;
}
/* end of our LL? then append a new record */
if (ps->pid != pid) {
char t[32];
struct ps_struct *parent;
ps->next_ps = malloc(sizeof(struct ps_struct));
if (!ps->next_ps) {
perror("malloc(ps_struct)");
exit (EXIT_FAILURE);
}
memset(ps->next_ps, 0, sizeof(struct ps_struct));
ps = ps->next_ps;
ps->pid = pid;
ps->sample = malloc(sizeof(struct ps_sched_struct) * (len + 1));
if (!ps->sample) {
perror("malloc(ps_struct)");
exit (EXIT_FAILURE);
}
memset(ps->sample, 0, sizeof(struct ps_sched_struct) * (len + 1));
pscount++;
/* mark our first sample */
ps->first = sample;
/* get name, start time */
if (!ps->sched) {
sprintf(filename, "/proc/%d/sched", pid);
ps->sched = open(filename, O_RDONLY);
if (ps->sched == -1)
continue;
}
s = pread(ps->sched, buf, sizeof(buf) - 1, 0);
if (s <= 0) {
close(ps->sched);
continue;
}
if (!sscanf(buf, "%s %*s %*s", key))
continue;
strncpy(ps->name, key, 16);
/* discard line 2 */
m = bufgetline(buf);
if (!m)
continue;
m = bufgetline(m);
if (!m)
continue;
if (!sscanf(m, "%*s %*s %s", t))
continue;
ps->starttime = strtod(t, NULL) / 1000.0;
/* ppid */
sprintf(filename, "/proc/%d/stat", pid);
st = fopen(filename, "r");
if (!st)
continue;
if (!fscanf(st, "%*s %*s %*s %i", &p)) {
fclose(st);
continue;
}
fclose(st);
ps->ppid = p;
/*
* setup child pointers
*
* these are used to paint the tree coherently later
* each parent has a LL of children, and a LL of siblings
*/
if (pid == 1)
continue; /* nothing to do for init atm */
/* kthreadd has ppid=0, which breaks our tree ordering */
if (ps->ppid == 0)
ps->ppid = 1;
parent = ps_first;
while ((parent->next_ps && parent->pid != ps->ppid))
parent = parent->next_ps;
if ((!parent) || (parent->pid != ps->ppid)) {
/* orphan */
ps->ppid = 1;
parent = ps_first->next_ps;
}
ps->parent = parent;
if (!parent->children) {
/* it's the first child */
parent->children = ps;
} else {
/* walk all children and append */
struct ps_struct *children;
children = parent->children;
while (children->next)
children = children->next;
children->next = ps;
}
}
/* else -> found pid, append data in ps */
/* below here is all continuous logging parts - we get here on every
* iteration */
/* rt, wt */
if (!ps->schedstat) {
sprintf(filename, "/proc/%d/schedstat", pid);
ps->schedstat = open(filename, O_RDONLY);
if (ps->schedstat == -1)
continue;
}
if (pread(ps->schedstat, buf, sizeof(buf) - 1, 0) <= 0) {
/* clean up our file descriptors - assume that the process exited */
close(ps->schedstat);
if (ps->sched)
close(ps->sched);
//if (ps->smaps)
// fclose(ps->smaps);
continue;
}
if (!sscanf(buf, "%s %s %*s", rt, wt))
continue;
ps->last = sample;
ps->sample[sample].runtime = atoll(rt);
ps->sample[sample].waittime = atoll(wt);
ps->total = (ps->sample[ps->last].runtime
- ps->sample[ps->first].runtime)
/ 1000000000.0;
if (!pss)
goto catch_rename;
/* Pss */
if (!ps->smaps) {
sprintf(filename, "/proc/%d/smaps", pid);
ps->smaps = fopen(filename, "r");
setvbuf(ps->smaps, smaps_buf, _IOFBF, sizeof(smaps_buf));
if (!ps->smaps)
continue;
} else {
rewind(ps->smaps);
}
while (1) {
int pss_kb;
/* skip one line, this contains the object mapped */
if (fgets(buf, sizeof(buf), ps->smaps) == NULL)
break;
/* then there's a 28 char 14 line block */
if (fread(buf, 1, 28 * 14, ps->smaps) != 28 * 14)
break;
pss_kb = atoi(&buf[61]);
ps->sample[sample].pss += pss_kb;
}
if (ps->sample[sample].pss > ps->pss_max)
ps->pss_max = ps->sample[sample].pss;
catch_rename:
/* catch process rename, try to randomize time */
mod = (hz < 4.0) ? 4.0 : (hz / 4.0);
if (((samples - ps->first) + pid) % (int)(mod) == 0) {
/* re-fetch name */
/* get name, start time */
if (!ps->sched) {
sprintf(filename, "/proc/%d/sched", pid);
ps->sched = open(filename, O_RDONLY);
if (ps->sched == -1)
continue;
}
if (pread(ps->sched, buf, sizeof(buf) - 1, 0) <= 0) {
/* clean up file descriptors */
close(ps->sched);
if (ps->schedstat)
close(ps->schedstat);
//if (ps->smaps)
// fclose(ps->smaps);
continue;
}
if (!sscanf(buf, "%s %*s %*s", key))
continue;
strncpy(ps->name, key, 16);
}
}
}

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