#!/bin/bash

if [ -z $KERN_DIR ]; then
	echo "Must set environment variable KERN_DIR"
	exit -1
fi

if [ -z $TEST_DIR ]; then
	echo "Must set environment variable TEST_DIR"
	exit -1
fi

THISDIR=`pwd`
CPUS=`cat /proc/cpuinfo |grep '^processor' | wc -l`
let THREADS=$CPUS*4
CNT=10
PRIO=10

do_compiles() {
	> $OUTPUT
	for i in `seq 1 $CNT`; do
		echo " Build $i"
		echo " BUILD $i" >> $OUTPUT
		make clean > /dev/null 2>&1
		(time $STEM make -j$THREADS) 2>&1 1>/dev/null | tail -3 >> $OUTPUT
		echo ""
		echo "" >> $OUTPUT
	done
}

cd $KERN_DIR

echo "Build cache clean"
make clean > /dev/null 2>&1
make -j$CPUS > /dev/null 2>&1

echo "Run $CNT builds"
OUTPUT=$THISDIR/results-kernel-build-`uname -r`.out
STEM=""
do_compiles

echo "Run $CNT builds as SCHED_FIFO $PRIO"
OUTPUT=$THISDIR/results-kernel-build-rt-`uname -r`.out
STEM="chrt -f $PRIO"
do_compiles