Simple tool to help with multiple perf runs

tools/perf_collect.sh

+#!/bin/sh
+
+set -e
+
+if [ "$#" -eq 0 ] ; then
+    echo "Usage: perf_collect.sh [commands to run benchmark]"
+    exit 1
+fi
+
+perf record -o $1.data -g -- $@
+perf report -i $1.data -n --no-call-graph | bash tools/cumulate.sh > $1.txt
+echo "Report saved in $1.txt (raw perf data saved in $1.data)"