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f4cc6b9913
Benchmarks aren't tests; create a top-level `benchmarks` folder and move `tests/benchmarks` to `benchmarks/cli`.
105 lines
2.8 KiB
Bash
Executable File
105 lines
2.8 KiB
Bash
Executable File
#!/bin/bash
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#
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# jmaps - creates java /tmp/perf-PID.map symbol maps for all java processes.
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#
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# This is a helper script that finds all running "java" processes, then executes
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# perf-map-agent on them all, creating symbol map files in /tmp. These map files
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# are read by perf_events (aka "perf") when doing system profiles (specifically,
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# the "report" and "script" subcommands).
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#
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# USAGE: jmaps [-u]
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# -u # unfoldall: include inlined symbols
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#
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# My typical workflow is this:
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#
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# perf record -F 99 -a -g -- sleep 30; jmaps
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# perf script > out.stacks
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# ./stackcollapse-perf.pl out.stacks | ./flamegraph.pl --color=java --hash > out.stacks.svg
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#
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# The stackcollapse-perf.pl and flamegraph.pl programs come from:
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# https://github.com/brendangregg/FlameGraph
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#
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# REQUIREMENTS:
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# Tune two environment settings below.
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#
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# 13-Feb-2015 Brendan Gregg Created this.
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# 20-Feb-2017 " " Added -u for unfoldall.
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JAVA_HOME=${JAVA_HOME:-/usr/lib/jvm/java-8-oracle}
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AGENT_HOME=${AGENT_HOME:-/usr/lib/jvm/perf-map-agent} # from https://github.com/jvm-profiling-tools/perf-map-agent
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debug=0
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if [[ "$USER" != root ]]; then
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echo "ERROR: not root user? exiting..."
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exit
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fi
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if [[ ! -x $JAVA_HOME ]]; then
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echo "ERROR: JAVA_HOME not set correctly; edit $0 and fix"
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exit
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fi
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if [[ ! -x $AGENT_HOME ]]; then
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echo "ERROR: AGENT_HOME not set correctly; edit $0 and fix"
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exit
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fi
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if [[ "$1" == "-u" ]]; then
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opts=unfoldall
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fi
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# figure out where the agent files are:
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AGENT_OUT=""
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AGENT_JAR=""
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if [[ -e $AGENT_HOME/out/attach-main.jar ]]; then
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AGENT_JAR=$AGENT_HOME/out/attach-main.jar
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elif [[ -e $AGENT_HOME/attach-main.jar ]]; then
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AGENT_JAR=$AGENT_HOME/attach-main.jar
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fi
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if [[ -e $AGENT_HOME/out/libperfmap.so ]]; then
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AGENT_OUT=$AGENT_HOME/out
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elif [[ -e $AGENT_HOME/libperfmap.so ]]; then
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AGENT_OUT=$AGENT_HOME
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fi
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if [[ "$AGENT_OUT" == "" || "$AGENT_JAR" == "" ]]; then
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echo "ERROR: Missing perf-map-agent files in $AGENT_HOME. Check installation."
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exit
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fi
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# Fetch map for all "java" processes
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echo "Fetching maps for all java processes..."
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for pid in $(pgrep -x java); do
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mapfile=/tmp/perf-$pid.map
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[[ -e $mapfile ]] && rm $mapfile
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cmd="cd $AGENT_OUT; $JAVA_HOME/bin/java -Xms32m -Xmx128m -cp $AGENT_JAR:$JAVA_HOME/lib/tools.jar net.virtualvoid.perf.AttachOnce $pid $opts"
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(( debug )) && echo $cmd
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user=$(ps ho user -p $pid)
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group=$(ps ho group -p $pid)
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if [[ "$user" != root ]]; then
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if [[ "$user" == [0-9]* ]]; then
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# UID only, likely GID too, run sudo with #UID:
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cmd="sudo -u '#'$user -g '#'$group sh -c '$cmd'"
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else
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cmd="sudo -u $user -g $group sh -c '$cmd'"
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fi
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fi
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echo "Mapping PID $pid (user $user):"
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if (( debug )); then
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time eval $cmd
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else
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eval $cmd
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fi
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if [[ -e "$mapfile" ]]; then
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chown root $mapfile
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chmod 666 $mapfile
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else
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echo "ERROR: $mapfile not created."
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fi
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echo "wc(1): $(wc $mapfile)"
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echo
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done
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