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.
This commit is contained in:
Timo Teras
parent
e93ecc6535
commit
52864ab482
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@ -0,0 +1,192 @@
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#!/bin/sh
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#
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# Bootchart logger script
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# Ziga Mahkovec <ziga.mahkovec@klika.si>
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#
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# Modified heavily for Alpine Linux bootcharting
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# Timo Teras <timo.teras@iki.fi>
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#
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# This script is used for data collection for the bootchart
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# boot performance visualization tool (http://www.bootchart.org).
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#
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# This script is tied to Alpine Init scripts and charts the
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# bootup procedure only.
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#
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PATH="/sbin:/bin:/usr/sbin:/usr/bin:$PATH"
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# Configuration for bootchartd, the bootchart logger script.
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TMPFS_SIZE=32m
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SAMPLE_PERIOD=0.1
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PROCESS_ACCOUNTING="no"
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BOOTLOG_DEST=/var/log/bootchart.tgz
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LOGDIR=/bootchart
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EXIT_PROC="mingetty agetty rungetty getty fgetty"
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# Monitoring commands
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log_cmd_1="cat /proc/stat"
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log_target_1=proc_stat.log
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# /proc/diskstats is available in 2.6 kernels
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log_cmd_2="cat /proc/diskstats"
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log_target_2=proc_diskstats.log
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log_cmd_3="cat /proc/[1-9]*/stat 2>/dev/null"
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log_target_3=proc_ps.log
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# Uncomment this line for diskless stations
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#log_cmd_4="cat /proc/net/dev"
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#log_target_4=proc_netdev.log
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max_log=3
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do_logging()
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{
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# Enable process accounting if configured
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if [ "$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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# open file descriptors
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i=1
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while [ $i -le $max_log ]; do
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eval target=\"\$log_target_$i\"
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if [ -z "$target" ]; then
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max_log=$i
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break
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fi
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fd=$((2 + $i))
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eval exec $fd'>>$target'
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eval log_fd_$i=$fd
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i=$(($i + 1))
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done
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not_stop_logging=true
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while $not_stop_logging && \
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{ ! pidof $EXIT_PROC >/dev/null; }; do
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if [ -r /proc/uptime ]; then
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# Write the time (in jiffies).
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read uptime < /proc/uptime
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uptime=${uptime%% [0-9]*}
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uptime=${uptime%.*}${uptime#*.}
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i=1
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while [ $i -le $max_log ]; do
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eval fd=\$log_fd_$i\; cmd=\$log_cmd_$i
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{
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echo $uptime
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# Log the command output
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eval $cmd
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echo
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} >&$fd
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i=$(($i + 1))
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done
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fi
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sleep $SAMPLE_PERIOD
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done
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# close file descriptors
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i=1
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while [ $i -le $max_log ]; do
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eval fd=\$log_fd_$i
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eval exec $fd'>&-'
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i=$(($i + 1))
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done
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[ -e kernel_pacct ] && accton off
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}
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# Stop the boot logger. The lock file is removed to force the loggers in
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# background to exit. Some final log files are created and then all log files
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# from the tmpfs are packaged and stored in $BOOTLOG_DEST.
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finalize()
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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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# Write system information
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# Log some basic information about the system.
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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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if [ -f /etc/alpine-release ]; then
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echo "system.release = $( sed q /etc/alpine-release )"
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elif [ -f /etc/gentoo-release ]; then
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echo "system.release = $( sed q /etc/gentoo-release )"
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elif [ -f /etc/SuSE-release ]; then
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echo "system.release = $( sed q /etc/SuSE-release )"
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elif [ -f /etc/debian_version ]; then
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echo "system.release = Debian GNU/$( uname -s ) $( cat /etc/debian_version )"
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elif [ -f /etc/frugalware-release ]; then
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echo "system.release = $( sed q /etc/frugalware-release )"
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elif [ -f /etc/pardus-release ]; then
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echo "system.release = $( sed q /etc/pardus-release )"
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else
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echo "system.release = $( sed 's/\\.//g;q' /etc/issue )"
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fi
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# Get CPU count
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local cpucount=$(grep -c '^processor' /proc/cpuinfo)
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if [ $cpucount -gt 1 -a -n "$(grep 'sibling.*2' /proc/cpuinfo)" ]; then
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# Hyper-Threading enabled
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cpucount=$(( $cpucount / 2 ))
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fi
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if grep -q '^model name' /proc/cpuinfo; then
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echo "system.cpu = $( grep '^model name' /proc/cpuinfo | sed q )"\
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"($cpucount)"
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else
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echo "system.cpu = $( grep '^cpu' /proc/cpuinfo | sed q )"\
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"($cpucount)"
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fi
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echo "system.kernel.options = $( sed q /proc/cmdline )"
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) >> header
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# Package log files
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tar -zcf "$BOOTLOG_DEST" header $pacct *.log
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rm "$LOGDIR"/*
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rmdir "$LOGDIR"
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}
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case "$1" in
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init)
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# Started by the kernel or by the init script.
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NEWROOT="$2"
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mkdir "$LOGDIR"
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cd "$LOGDIR"
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(
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trap "not_stop_logging=false" USR1
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reexec=false
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trap "reexec=true; not_stop_logging=false" USR2
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do_logging
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if $reexec; then
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mkdir "$NEWROOT$LOGDIR"
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mv * "$NEWROOT$LOGDIR"
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cp /sbin/bootchartd $NEWROOT/sbin
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exec chroot $NEWROOT /sbin/bootchartd continue_logging \
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"$LOGDIR" </newroot/dev/null \
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>$NEWROOT/dev/console 2>&1
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else
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sleep $SAMPLE_PERIOD
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sleep $SAMPLE_PERIOD
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finalize
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fi
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) &
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;;
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continue_logging)
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cd "$2"
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trap "not_stop_logging=false" USR1
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do_logging
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finalize
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;;
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esac
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exit 0
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