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Message-ID: <7daee7bc-bf4c-ab24-dbf2-467371ee72e1@amd.com>
Date: Thu, 29 Feb 2024 12:14:21 +0530
From: K Prateek Nayak <kprateek.nayak@....com>
To: John Stultz <jstultz@...gle.com>
Cc: LKML <linux-kernel@...r.kernel.org>, Joel Fernandes <joelaf@...gle.com>,
Qais Yousef <qyousef@...gle.com>, Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Valentin Schneider <vschneid@...hat.com>,
Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>,
Zimuzo Ezeozue <zezeozue@...gle.com>, Youssef Esmat
<youssefesmat@...gle.com>, Mel Gorman <mgorman@...e.de>,
Daniel Bristot de Oliveira <bristot@...hat.com>,
Will Deacon <will@...nel.org>, Waiman Long <longman@...hat.com>,
Boqun Feng <boqun.feng@...il.com>, "Paul E. McKenney" <paulmck@...nel.org>,
Metin Kaya <Metin.Kaya@....com>, Xuewen Yan <xuewen.yan94@...il.com>,
Thomas Gleixner <tglx@...utronix.de>, kernel-team@...roid.com
Subject: Re: [RESEND][PATCH v8 0/7] Preparatory changes for Proxy Execution v8
Hello John,
On 2/29/2024 11:49 AM, John Stultz wrote:
> On Wed, Feb 28, 2024 at 9:37 AM 'K Prateek Nayak' via kernel-team
> <kernel-team@...roid.com> wrote:
>> I got a chance to test the whole of v8 patches on the same dual socket
>> 3rd Generation EPYC system:
>>
>> tl;dr
>>
>> - There is a slight regression in hackbench but instead of the 10x
>> blowup seen previously, it is only around 5% with overloaded case
>> not regressing at all.
>>
>> - A small but consistent (~2-3%) regression is seen in tbench and
>> netperf.
>
> Once again, thank you so much for your testing and reporting of the
> data! I really appreciate it!
>
> Do you mind sharing exactly how you're running the benchmarks? (I'd
> like to try to reproduce these locally (though my machine is much
> smaller).
>
> I'm guessing the hackbench one is the same command you shared earlier with v6?
Yup it is same as earlier. I'll list all the commands down below:
o Hackbench
perf bench sched messaging -p -t -l 100000 -g <# of groups>
o Old schbench
git://git.kernel.org/pub/scm/linux/kernel/git/mason/schbench.git
at commit e4aa540 ("Make sure rps isn't zero in auto_rps mode.")
schbench -m 2 -t <# workers> -r 30
(I should probably upgrade this to the latest! Let me get on it)
o tbench (https://www.samba.org/ftp/tridge/dbench/dbench-4.0.tar.gz)
nohup tbench_srv 0 &
tbench -c client.txt -t 60 <# clients> 127.0.0.1
o Stream (https://www.cs.virginia.edu/stream/FTP/Code/)
export ARRAY_SIZE=128000000; # 4 * Local L3 size
gcc -DSTREAM_ARRAY_SIZE=$ARRAY_SIZE -DNTIMES=<Loops internally> -fopenmp -O2 stream.c -o stream
export OMP_NUM_THREADS=16; # Number of CCX on my machine
./stream;
o netperf
netserver -L 127.0.0.1
for i in `seq 0 1 <num clients>`;
do
netperf -H 127.0.0.1 -t TCP_RR -l 100 -- -r 100 -k REQUEST_SIZE,RESPONSE_SIZE,ELAPSED_TIME,THROUGHPUT,THROUGHPUT_UNITS,MIN_LATENCY,MEAN_LATENCY,P50_LATENCY,P90_LATENCY,P99_LATENCY,MAX_LATENCY,STDDEV_LATENCY&
done
wait;
o Unixbench (from mmtest)
./run-mmtests.sh --no-monitor --config configs/config-workload-unixbench
--
If you have any other question, please do let me know :)
>
> thanks
> -john
--
Thanks and Regards,
Prateek
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