perf-java-flames

#!/bin/sh
set -e
#set -x

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

PID=$1

if [ -z $PERF_JAVA_TMP ]; then
  PERF_JAVA_TMP=/tmp
fi

STACKS=$PERF_JAVA_TMP/out-$PID.stacks
COLLAPSED=$PERF_JAVA_TMP/out-$PID.collapsed
PERF_MAP_DIR=$(dirname $(readlink -f $0))/..

#if [ -n $FLAMEGRAPH_DIR ]; then
#   FLAMEGRAPH_DIR=/home/johannes/git/opensource/FlameGraph
#fi

if [ ! -x $FLAMEGRAPH_DIR/stackcollapse-perf.pl ]; then
  echo "FlameGraph executable not found at '$FLAMEGRAPH_DIR/stackcollapse-perf.pl'. Please set FLAMEGRAPH_DIR to the root of the clone of https://github.com/brendangregg/FlameGraph."
  exit
fi

if [ -z $PERF_DATA_FILE ]; then
  PERF_DATA_FILE=$PERF_JAVA_TMP/perf-$PID.data
fi

if [ -z $PERF_FLAME_OUTPUT ]; then
  PERF_FLAME_OUTPUT=flamegraph-$PID.svg
fi

$PERF_MAP_DIR/bin/perf-java-record-stack $*
perf script -i $PERF_DATA_FILE > $STACKS
$FLAMEGRAPH_DIR/stackcollapse-perf.pl $STACKS | tee $COLLAPSED | $FLAMEGRAPH_DIR/flamegraph.pl --color=java > $PERF_FLAME_OUTPUT
echo "Flame graph SVG written to PERF_FLAME_OUTPUT='`readlink -f $PERF_FLAME_OUTPUT`'."