Re: [LTP] [Patch 1/10]Patch to integrate kernbench to LTP to test sched_mc=2

Subrata Modak
2009-06-30T16:10:07Z

On Tue, 2009-06-30 at 20:27 +0530, Poornima Nayak wrote:
> [Patch 1/10]Patch to integrate kernbench to LTP to test sched_mc=2
> To verify CPU consolidation when sched_mc=2 we need kernbench. Hence integrating it
> in LTP.
>
> Signed-off-by: poornima nayak <mpnayak@linux.vnet.ibm.com>
Thanks.
>
> diff -uprN ltp_orig/utils/benchmark/kernbench-0.42/COPYING ltp_patched/utils/benchmark/kernbench-0.42/COPYING
> --- ltp_orig/utils/benchmark/kernbench-0.42/COPYING 1970-01-01 05:30:00.000000000 +0530
> +++ ltp_patched/utils/benchmark/kernbench-0.42/COPYING 2009-06-30 15:05:39.000000000 +0530
> @@ -0,0 +1,340 @@
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> diff -uprN ltp_orig/utils/benchmark/kernbench-0.42/kernbench ltp_patched/utils/benchmark/kernbench-0.42/kernbench
> --- ltp_orig/utils/benchmark/kernbench-0.42/kernbench 1970-01-01 05:30:00.000000000 +0530
> +++ ltp_patched/utils/benchmark/kernbench-0.42/kernbench 2009-06-30 15:05:39.000000000 +0530
> @@ -0,0 +1,233 @@
> +#!/bin/sh
> +# kernbench by Con Kolivas <kernbench@kolivas.org>
> +# based on a benchmark by Martin J. Bligh
> +trap 'echo "ABORTING";exit' 1 2 15
> +
> +VERSION=0.42
> +
> +num_runs=5
> +single_runs=0
> +half_runs=1
> +opti_runs=1
> +max_runs=1
> +fast_run=0
> +
> +while getopts vsHOMn:o:hf i
> +do
> + case $i in
> + h) echo "kernbench v$VERSION by Con Kolivas <kernbench@kolivas.org>"
> + echo "Usage:"
> + echo "kernbench [-n runs] [-o jobs] [-s] [-H] [-O] [-M] [-h] [-v]"
> + echo "n : number of times to perform benchmark (default 5)"
> + echo "o : number of jobs for optimal run (default 4 * cpu)"
> + echo "s : perform single threaded runs (default don't)"
> + echo "H : don't perform half load runs (default do)"
> + echo "O : don't perform optimal load runs (default do)"
> + echo "M : don't perform maximal load runs (default do)"
> + echo "f : fast run"
> + echo "h : print this help"
> + echo "v : print version number"
> + exit ;;
> + v) echo "kernbench Version $VERSION by Con Kolivas <kernbench@kolivas.org>" ; exit ;;
> + n) nruns=$OPTARG ;;
> + o) optijobs=$OPTARG ;;
> + s) single_runs=1 ;;
> + H) half_runs=0 ;;
> + O) opti_runs=0 ;;
> + M) max_runs=0 ;;
> + f) fast_run=1 ;;
> + esac
> +done
> +
> +if [[ ! -f include/linux/kernel.h ]] ; then
> + echo "No kernel source found; exiting"
> + exit
> +fi
> +
> +for i in time awk yes date
> +do
> + iname=`which $i`
> + if [[ ! -a $iname ]] ; then
> + echo "$i not found in path, please install it; exiting"
> + exit
> + fi
> +done
> +
> +time=`which time`
> +
> +if [[ $nruns -gt 0 ]] ; then
> + num_runs=$nruns
> +elif [[ $fast_run -eq 1 ]]; then
> + echo "Dropping to 3 runs for fast run"
> + num_runs=3
> +fi
> +
> +if (($num_runs < 1)) ; then
> + echo "Nothing to do; exiting"
> + exit
> +fi
> +
> +if (($num_runs > 10)) ; then
> + echo "Are you crazy? trimming number of runs to 10"
> + num_runs=10
> +fi
> +
> +if [[ ! -d /proc ]] ; then
> + echo "Can't find proc filesystem; exiting"
> + exit
> +fi
> +
> +mem=`awk '/MemTotal/ {print $2}' /proc/meminfo`
> +if [[ $mem -lt 4000000 && $max_runs -gt 0 ]] ; then
> + echo Less than 4Gb ram detected!
> + echo Maximal loads will not measure cpu throughput and may cause a swapstorm!
> + echo If you did not plan this, -M flag is recommended to bypass maximal load.
> +fi
> +
> +(( single_runs *= $num_runs ))
> +(( half_runs *= $num_runs ))
> +(( opti_runs *= $num_runs ))
> +(( max_runs *= $num_runs ))
> +
> +cpus=`grep -c ^processor /proc/cpuinfo`
> +echo $cpus cpus found
> +echo Cleaning source tree...
> +make clean > /dev/null 2>&1
> +
> +if [[ $fast_run -eq 0 ]] ; then
> + echo Caching kernel source in ram...
> + for i in `find -type f`
> + do
> + cat $i > /dev/null
> + done
> +fi
> +
> +if [[ ! -f .config ]] ; then
> + echo No old config found, using defconfig
> + echo Making mrproper
> + make mrproper > /dev/null 2>&1
> + echo Making defconfig...
> + make defconfig > /dev/null 2>&1
> +else
> + echo Making oldconfig...
> + yes "" | make oldconfig > /dev/null 2>&1
> +fi
> +
> +halfjobs=$(( $cpus / 2 ))
> +optijobs=${optijobs:=$(( $cpus * 4 ))}
> +
> +if [[ $halfjobs -lt 2 ]] ; then
> + echo "Half load is no greater than single; disabling"
> + half_runs=0
> +elif [[ $halfjobs -eq 2 ]] ; then
> + echo "Half load is 2 jobs, changing to 3 as a kernel compile won't guarantee 2 jobs"
> + halfjobs=3
> +fi
> +
> +echo Kernel `uname -r`
> +echo Performing $num_runs runs of
> +if [[ $single_runs -gt 0 ]] ; then
> + echo make
> +fi
> +if [[ $half_runs -gt 0 ]] ; then
> + echo make -j $halfjobs
> +fi
> +if [[ $opti_runs -gt 0 ]] ; then
> + echo make -j $optijobs
> +fi
> +if [[ $max_runs -gt 0 ]] ; then
> + echo make -j
> +fi
> +echo
> +
> +echo All data logged to kernbench.log
> +
> +if [[ $fast_run -eq 0 ]] ; then
> + echo Warmup run...
> + make -j $optijobs > /dev/null 2>&1
> +fi
> +
> +date >> kernbench.log
> +uname -r >> kernbench.log
> +
> +add_data_point()
> +{
> + echo $@ | awk '{printf "%.6f %.6f %d", $1 + $2, $1 * $1 + $3, $4 + 1}'
> +}
> +
> +show_statistics()
> +{
> + case $3 in
> + 0)
> + echo "No data"
> + ;;
> + 1)
> + echo $1
> + ;;
> + *)
> + avg=`echo $1 $3 | awk '{print $1 / $2}'`
> + var=`echo $1 $2 $3 | awk '{print ($2 - ($1 * $1) / $3) / ($3 - 1)}'`
> + sdev=`echo $var | awk '{print $1^0.5}'`
> + echo "$avg ($sdev)"
> + ;;
> + esac
> +}
> +
> +do_log()
> +{
> + echo "Average $runname Run (std deviation):" > templog
> + echo Elapsed Time `show_statistics $temp_elapsed` >> templog
> + echo User Time `show_statistics $temp_user` >> templog
> + echo System Time `show_statistics $temp_sys` >> templog
> + echo Percent CPU `show_statistics $temp_percent` >> templog
> + echo Context Switches `show_statistics $temp_ctx` >> templog
> + echo Sleeps `show_statistics $temp_sleeps` >> templog
> + echo >> templog
> + cat templog
> + cat templog >> kernbench.log
> +}
> +
> +do_runs()
> +{
> + temp_elapsed="a"
> + for (( i=1 ; i <= temp_runs ; i++ ))
> + do
> + echo $runname run number $i...
> + make clean > /dev/null 2>&1
> + sync
> + if [[ $fast_run -eq 0 ]] ; then
> + sleep 5
> + fi
> + $time -f "%e %U %S %P %c %w" -o timelog make -j $tempjobs > /dev/null 2>&1
> + read elapsed_time user_time sys_time percent ctx sleeps <timelog
> + temp_elapsed=`add_data_point $elapsed_time $temp_elapsed`
> + temp_user=`add_data_point $user_time $temp_user`
> + temp_sys=`add_data_point $sys_time $temp_sys`
> + temp_percent=`add_data_point $percent $temp_percent`
> + temp_ctx=`add_data_point $ctx $temp_ctx`
> + temp_sleeps=`add_data_point $sleeps $temp_sleeps`
> + done
> + if [[ $temp_runs -ne 0 ]] ; then
> + do_log
> + fi
> +}
> +
> +temp_runs=$single_runs
> +tempjobs=1
> +runname="Single threaded"
> +do_runs
> +
> +temp_runs=$half_runs
> +tempjobs=$halfjobs
> +runname="Half load -j $halfjobs"
> +do_runs
> +
> +temp_runs=$opti_runs
> +tempjobs=$optijobs
> +runname="Optimal load -j $optijobs"
> +do_runs
> +
> +temp_runs=$max_runs
> +tempjobs=""
> +runname="Maximal load -j"
> +do_runs
> diff -uprN ltp_orig/utils/benchmark/kernbench-0.42/Makefile ltp_patched/utils/benchmark/kernbench-0.42/Makefile
> --- ltp_orig/utils/benchmark/kernbench-0.42/Makefile 1970-01-01 05:30:00.000000000 +0530
> +++ ltp_patched/utils/benchmark/kernbench-0.42/Makefile 2009-06-30 15:05:39.000000000 +0530
> @@ -0,0 +1,8 @@
> +all:
> +
> +install:
> + chmod ugo+x kernbench
> +
> +configure:
> +
> +clean:
> diff -uprN ltp_orig/utils/benchmark/kernbench-0.42/README ltp_patched/utils/benchmark/kernbench-0.42/README
> --- ltp_orig/utils/benchmark/kernbench-0.42/README 1970-01-01 05:30:00.000000000 +0530
> +++ ltp_patched/utils/benchmark/kernbench-0.42/README 2009-06-30 15:05:39.000000000 +0530
> @@ -0,0 +1,81 @@
> +Kernbench v0.42
> +
> +
> +What is this?
> +
> +This is a cpu throughput benchmark originally devised and used by Martin J.
> +Bligh. It is designed to compare kernels on the same machine, or to compare
> +hardware. To compare hardware you need to be running the same architecture
> +machines (eg i386), the same userspace binaries and run kernbench on the same
> +kernel source tree.
> +
> +It runs a kernel at various numbers of concurrent jobs: 1/2 number of cpus,
> +optimal (default is 4xnumber of cpus) and maximal job count. Optionally it can
> +also run single threaded. It then prints out a number of useful statistics
> +for the average of each group of runs and logs them to kernbench.log
> +
> +You need more than 2Gb of ram for this to be a true throughput benchmark or
> +else you will get swapstorms.
> +
> +Ideally it should be run in single user mode on a non-journalled filesystem.
> +To compare results it should always be run in the same kernel tree.
> +
> +
> +How do I use it?
> +
> +You need a kernel tree (any 2.6 will do) and the applications 'time', 'awk',
> +'date' and 'yes' installed. 'time' is different to the builtin time used by
> +BASH and has more information desired for this benchmark.
> +
> +Simply cd into the kernel tree directory and type
> +
> +/path/to/kernbench
> +
> +
> +Options
> +
> +kernbench [-n runs] [-o jobs] [-s] [-H] [-O] [-M] [-h] [-v]
> +n : number of times to perform benchmark (default 5)
> +o : number of jobs for optimal run (default 4 * cpu)
> +s : perform single threaded runs (default don't)
> +H : don't perform half load runs (default do)
> +O : don't perform optimal load runs (default do)
> +M : don't perform maximal load runs (default do)
> +f : fast run
> +h : print this help
> +v : print version number
> +
> +
> +Changelog:
> +v0.42 Fixed incorrect counting of cpus (thanks Flynn Marquardt)
> + Changed -j to at least 4GB ram.
> +
> +v0.41 Fixed make oldconfig
> +
> +v0.40 Made all runs use the oldconfig if it exists. Changed to only do one
> + warmup run before all the benchmarks. Added logging to kernbench.log
> + Cleaned up the code substantially to reuse code where possible.
> + Added standard deviation statistics courtesy of Peter Williams
> +
> +v0.30 Added fast run option which bypasses caching, warmup and tree
> + preparation and drops number of runs to 3. Modified half loads to
> + detect -j2 and change to -j3. Added syncs. Improved warnings and
> + messages.
> +
> +v0.20 Change to average of runs, add options to choose which runs to perform
> + remove single threaded run from defaults, do warmup run, lots more
> + sanity checks, drop meaningless runs, add a few warnings, remove fudge
> + factor from no. of jobs.
> +
> +v0.11 First public release
> +
> +
> +Thanks: M. Bligh for ideas. Others for help with magic incantations to get
> + BASH to work.
> +
> +
> +Con Kolivas <kernbench@kolivas.org>
> +Mon Jun 18 18:59:24 2007
> +
> +License:
> +GPL of course. Read COPYING included in this tarball.
>
> ------------------------------------------------------------------------------
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