55 lines
2.5 KiB
Bash
Executable File
55 lines
2.5 KiB
Bash
Executable File
#! /bin/bash
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#
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# get a flamegraph of an online session
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# a) sends SIGUSR1 to get kitbrokers to dump info to logs
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# b) scans likely logs for that info and scrapes out the
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# document, users and pids
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# c) prompts for which pid to profile
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# d) profiles, then generates flamegraph on ctrl+c
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if ! test `id -u` = 0; then
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echo "not root, if this doesn't work try sudo profile-cool"
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fi
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if ! which flamegraph.pl > /dev/null 2>&1; then
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REAL_USER_HOME="$(getent passwd $SUDO_USER | cut -d: -f6)"
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PATH=$PATH:$HOME/FlameGraph:$REAL_USER_HOME/FlameGraph
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fi
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if ! which flamegraph.pl > /dev/null 2>&1; then
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echo "no flamegraph.pl found"
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echo "On fedora install systemwide with: sudo dnf install flamegraph"
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echo "Otherwise install locally manually into ~/FlameGraph"
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echo " e.g. git clone https://github.com/brendangregg/FlameGraph ~/FlameGraph"
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exit 1
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fi
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# a deployment will log to journal, take current time to grep logs from that time point
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date=`date +%s`
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# a local dev build dumps to /tmp/coolwsd.log by default, take current size to grep from that size point
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if [ -e /tmp/coolwsd.log ]; then
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locallogsize=`du -b /tmp/coolwsd.log|cut -f1`
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fi
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echo using pkill -SIGUSR1 kitbroker to dump info
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pkill -SIGUSR1 kitbroker
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echo Waiting 1 second for results
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sleep 1
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echo ---systemd journal---
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# We might have multiple coolwsds and we want the output from all of them.
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# But we want lines from each pid to be grouped together, and each group
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# of lines to be in chronological order.
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# So use short-unix to retain the name[pid], stable sort on that key
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# then use cut to remove the columns we only included to get the desired
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# order
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journalctl --since @$date -t "coolwsd" -o short-unix | sort -s -k3,3 | cut -d " " -f 4- | grep -P "\Wpid:|\WjailedUrl:|\WviewId:.*userExtraInfo:"
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if [ -e /tmp/coolwsd.log ]; then
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echo ---local dev log---
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tail -c +$locallogsize /tmp/coolwsd.log | grep -P "\Wpid:|\WjailedUrl:|\WviewId:.*userExtraInfo:"
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fi
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echo -n "enter pid to measure performance of: "
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read kitpid
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echo now running perf to record performance data, press ctrl+c when ready to generate output
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trap ' ' INT
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# note a) perf version 6.4.4 doesn't unmangle c++ names correctly for me, while 6.2.6 does
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perf record -F50 --call-graph dwarf,65528 --pid $kitpid
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# note b) perf version 5.14.21 is agonizingly slow without --no-inline, while 6.2.6 seems ok
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# merge all the background saves together as kitdbgsv
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perf script --no-inline | stackcollapse-perf.pl | sed -E -s "s/^kitbgsv[^;]+/kitbgsv/" | flamegraph.pl > perf-$kitpid.svg
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echo generated flamegraph output svg: perf-$kitpid.svg
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