From 8349ad8ecf2b2d533e2c3180444eaf08c139c6cf Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Wed, 17 Dec 2014 19:16:16 +0300
Subject: [PATCH] Inter-commit performance comparison script.

---
 tools/perf_compare.sh | 61 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100755 tools/perf_compare.sh

diff --git a/tools/perf_compare.sh b/tools/perf_compare.sh
new file mode 100755
index 000000000..5f8963bcd
--- /dev/null
+++ b/tools/perf_compare.sh
@@ -0,0 +1,61 @@
+# Copyright 2014 Samsung Electronics Co., Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#!/bin/bash
+
+commit_first=$1
+shift
+
+commit_second=$1
+shift
+
+exceptions="-e '' $*"
+
+if [[ "$commit_first" == "" ]] || [[ "$commit_second" == "" ]]
+then
+  exit 1
+fi
+
+perf_first=`git notes --ref=arm-linux-perf show $commit_first | grep -v $exceptions`
+if [ $? -ne 0 ]
+then
+  exit 1
+fi
+
+perf_second=`git notes --ref=arm-linux-perf show $commit_second | grep -v $exceptions`
+if [ $? -ne 0 ]
+then
+  exit 1
+fi
+
+n=0
+rel_mult=1.0
+for bench in `echo "$perf_first" | cut -d ':' -f 1`
+do
+  value1=`echo "$perf_first" | grep "^$bench: " | cut -d ':' -f 2 | cut -d 's' -f 1`
+  value2=`echo "$perf_second" | grep "^$bench: " | cut -d ':' -f 2 | cut -d 's' -f 1`
+  rel=`echo $value1 $value2 | awk '{print $2 / $1; }'`
+  percent=`echo $rel | awk '{print (1.0 - $1) * 100; }'`
+
+  n=`echo $n | awk '{print $1 + 1;}'`;
+  rel_mult=`echo $rel_mult $rel | awk '{print $1 * $2;}'`
+
+  echo $bench":"$value1"s ->"$value2"s ("$percent" %)"
+done
+
+rel_gmean=`echo $rel_mult $n | awk '{print $1 ^ (1.0 / $2);}'`
+percent_gmean=`echo $rel_gmean | awk '{print (1.0 - $1) * 100;}'`
+
+echo
+echo $n $rel_mult $rel_gmean "("$percent_gmean "%)"