Commit 52864ab4 authored by Timo Teräs's avatar Timo Teräs

initramfs: bootchart support

include a modified version of bootchartd, and modify the initramfs
to take start recording of boot sequence to /var/log/bootchart.tgz
if "chart" option is specified in boot command line.
parent e93ecc65
#!/bin/sh
#
# Bootchart logger script
# Ziga Mahkovec <ziga.mahkovec@klika.si>
#
# Modified heavily for Alpine Linux bootcharting
# Timo Teras <timo.teras@iki.fi>
#
# This script is used for data collection for the bootchart
# boot performance visualization tool (http://www.bootchart.org).
#
# This script is tied to Alpine Init scripts and charts the
# bootup procedure only.
#
PATH="/sbin:/bin:/usr/sbin:/usr/bin:$PATH"
# Configuration for bootchartd, the bootchart logger script.
TMPFS_SIZE=32m
SAMPLE_PERIOD=0.1
PROCESS_ACCOUNTING="no"
BOOTLOG_DEST=/var/log/bootchart.tgz
LOGDIR=/bootchart
EXIT_PROC="mingetty agetty rungetty getty fgetty"
# Monitoring commands
log_cmd_1="cat /proc/stat"
log_target_1=proc_stat.log
# /proc/diskstats is available in 2.6 kernels
log_cmd_2="cat /proc/diskstats"
log_target_2=proc_diskstats.log
log_cmd_3="cat /proc/[1-9]*/stat 2>/dev/null"
log_target_3=proc_ps.log
# Uncomment this line for diskless stations
#log_cmd_4="cat /proc/net/dev"
#log_target_4=proc_netdev.log
max_log=3
do_logging()
{
# Enable process accounting if configured
if [ "$PROCESS_ACCOUNTING" = "yes" ]; then
[ -e kernel_pacct ] || : > kernel_pacct
accton kernel_pacct
fi
# open file descriptors
i=1
while [ $i -le $max_log ]; do
eval target=\"\$log_target_$i\"
if [ -z "$target" ]; then
max_log=$i
break
fi
fd=$((2 + $i))
eval exec $fd'>>$target'
eval log_fd_$i=$fd
i=$(($i + 1))
done
not_stop_logging=true
while $not_stop_logging && \
{ ! pidof $EXIT_PROC >/dev/null; }; do
if [ -r /proc/uptime ]; then
# Write the time (in jiffies).
read uptime < /proc/uptime
uptime=${uptime%% [0-9]*}
uptime=${uptime%.*}${uptime#*.}
i=1
while [ $i -le $max_log ]; do
eval fd=\$log_fd_$i\; cmd=\$log_cmd_$i
{
echo $uptime
# Log the command output
eval $cmd
echo
} >&$fd
i=$(($i + 1))
done
fi
sleep $SAMPLE_PERIOD
done
# close file descriptors
i=1
while [ $i -le $max_log ]; do
eval fd=\$log_fd_$i
eval exec $fd'>&-'
i=$(($i + 1))
done
[ -e kernel_pacct ] && accton off
}
# Stop the boot logger. The lock file is removed to force the loggers in
# background to exit. Some final log files are created and then all log files
# from the tmpfs are packaged and stored in $BOOTLOG_DEST.
finalize()
{
# Stop process accounting if configured
local pacct=
[ -e kernel_pacct ] && pacct=kernel_pacct
# Write system information
# Log some basic information about the system.
(
echo "version = $VERSION"
echo "title = Boot chart for $( hostname | sed q ) ($( date ))"
echo "system.uname = $( uname -srvm | sed q )"
if [ -f /etc/alpine-release ]; then
echo "system.release = $( sed q /etc/alpine-release )"
elif [ -f /etc/gentoo-release ]; then
echo "system.release = $( sed q /etc/gentoo-release )"
elif [ -f /etc/SuSE-release ]; then
echo "system.release = $( sed q /etc/SuSE-release )"
elif [ -f /etc/debian_version ]; then
echo "system.release = Debian GNU/$( uname -s ) $( cat /etc/debian_version )"
elif [ -f /etc/frugalware-release ]; then
echo "system.release = $( sed q /etc/frugalware-release )"
elif [ -f /etc/pardus-release ]; then
echo "system.release = $( sed q /etc/pardus-release )"
else
echo "system.release = $( sed 's/\\.//g;q' /etc/issue )"
fi
# Get CPU count
local cpucount=$(grep -c '^processor' /proc/cpuinfo)
if [ $cpucount -gt 1 -a -n "$(grep 'sibling.*2' /proc/cpuinfo)" ]; then
# Hyper-Threading enabled
cpucount=$(( $cpucount / 2 ))
fi
if grep -q '^model name' /proc/cpuinfo; then
echo "system.cpu = $( grep '^model name' /proc/cpuinfo | sed q )"\
"($cpucount)"
else
echo "system.cpu = $( grep '^cpu' /proc/cpuinfo | sed q )"\
"($cpucount)"
fi
echo "system.kernel.options = $( sed q /proc/cmdline )"
) >> header
# Package log files
tar -zcf "$BOOTLOG_DEST" header $pacct *.log
rm "$LOGDIR"/*
rmdir "$LOGDIR"
}
case "$1" in
init)
# Started by the kernel or by the init script.
NEWROOT="$2"
mkdir "$LOGDIR"
cd "$LOGDIR"
(
trap "not_stop_logging=false" USR1
reexec=false
trap "reexec=true; not_stop_logging=false" USR2
do_logging
if $reexec; then
mkdir "$NEWROOT$LOGDIR"
mv * "$NEWROOT$LOGDIR"
cp /sbin/bootchartd $NEWROOT/sbin
exec chroot $NEWROOT /sbin/bootchartd continue_logging \
"$LOGDIR" </newroot/dev/null \
>$NEWROOT/dev/console 2>&1
else
sleep $SAMPLE_PERIOD
sleep $SAMPLE_PERIOD
finalize
fi
) &
;;
continue_logging)
cd "$2"
trap "not_stop_logging=false" USR1
do_logging
finalize
;;
esac
exit 0
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