From: Mike Galbraith <efault@gmx.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Chen Yu <yu.c.chen@intel.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Mel Gorman <mgorman@techsingularity.net>,
Tim Chen <tim.c.chen@intel.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
Abel Wu <wuyun.abel@bytedance.com>,
Yicong Yang <yangyicong@hisilicon.com>,
"Gautham R . Shenoy" <gautham.shenoy@amd.com>,
Honglei Wang <wanghonglei@didichuxing.com>,
Len Brown <len.brown@intel.com>, Chen Yu <yu.chen.surf@gmail.com>,
Tianchen Ding <dtcccc@linux.alibaba.com>,
Joel Fernandes <joel@joelfernandes.org>,
Josh Don <joshdon@google.com>,
kernel test robot <yujie.liu@intel.com>,
Arjan Van De Ven <arjan.van.de.ven@intel.com>,
Aaron Lu <aaron.lu@intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 2/2] sched/fair: Introduce SIS_CURRENT to wake up short task on current CPU
Date: Tue, 02 May 2023 04:51:51 +0200 [thread overview]
Message-ID: <4e271e7d95fe862c9f201b6f04b16b1423ae3dcb.camel@gmx.de> (raw)
In-Reply-To: <20230501184920.GC1597476@hirez.programming.kicks-ass.net>
On Mon, 2023-05-01 at 20:49 +0200, Peter Zijlstra wrote:
> On Mon, May 01, 2023 at 05:32:05PM +0200, Mike Galbraith wrote:
> > On Mon, 2023-05-01 at 15:48 +0200, Peter Zijlstra wrote:
> > >
> > > Throughput 646.55 MB/sec 2 clients 2 procs max_latency=0.104 ms
> > > Throughput 1361.06 MB/sec 5 clients 5 procs max_latency=0.100 ms
> > > Throughput 1889.82 MB/sec 10 clients 10 procs max_latency=0.154 ms
> > > Throughput 2406.57 MB/sec 20 clients 20 procs max_latency=3.667 ms
> > > Throughput 2318.00 MB/sec 40 clients 40 procs max_latency=0.390 ms
> > > Throughput 2384.85 MB/sec 80 clients 80 procs max_latency=1.371 ms
> > >
> > >
> > > So what's going on here? I don't see anything exciting happening at the
> > > 40 mark. At the same time, I can't seem to reproduce Mike's latency pile
> > > up either :/
> >
> > Are you running tbench in the GUI so the per second output stimulates
> > assorted goo? I'm using KDE fwtw.
>
> Nah, the IVB-EP is headless, doesn't even have systemd on, still running
> sysvinit.
Turns out load distribution on Yu's box wasn't going wonky way early
after all, so WA_WEIGHT's evil side is off topic wrt $subject. Hohum.
-Mike
next prev parent reply other threads:[~2023-05-02 2:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-28 23:15 [PATCH v8 0/2] sched/fair: Introduce SIS_CURRENT to wake up short task on current CPU Chen Yu
2023-04-28 23:16 ` [PATCH v8 1/2] sched/fair: Record the average duration of a task Chen Yu
2023-04-28 23:16 ` [PATCH v8 2/2] sched/fair: Introduce SIS_CURRENT to wake up short task on current CPU Chen Yu
2023-04-29 19:34 ` Mike Galbraith
2023-05-01 8:25 ` Peter Zijlstra
2023-05-01 15:15 ` Chen Yu
2023-05-01 13:48 ` Peter Zijlstra
2023-05-01 15:32 ` Mike Galbraith
2023-05-01 15:37 ` Mike Galbraith
2023-05-01 18:49 ` Peter Zijlstra
2023-05-02 2:51 ` Mike Galbraith [this message]
2023-05-01 15:52 ` Chen Yu
2023-05-02 11:54 ` Peter Zijlstra
2023-05-04 11:07 ` Chen Yu
2023-05-12 8:29 ` kernel test robot
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