From: Peter Zijlstra <peterz@infradead.org>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Chen Yu <yu.c.chen@intel.com>,
kernel test robot <oliver.sang@intel.com>,
oe-lkp@lists.linux.dev, lkp@intel.com,
linux-kernel@vger.kernel.org, x86@kernel.org,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [tip:sched/eevdf] [sched/fair] e0c2ff903c: phoronix-test-suite.blogbench.Write.final_score -34.8% regression
Date: Wed, 16 Aug 2023 01:52:01 +0200 [thread overview]
Message-ID: <20230815235201.GH971582@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <bd96d883d0d1575ebbee4323f4396596adb0ad09.camel@gmail.com>
On Mon, Aug 14, 2023 at 08:32:55PM +0200, Mike Galbraith wrote:
> I don't have that phoronix thingy, but the above didn't seem to do
> anything for hackbench here.
Yeah, looking at it this is because the lag and the request/slice are on
the same order of things.
More thinking required, but perhaps not at 2am.
> I whack eevdf with the stick below to dampen its scheduling enthusiasm
> a little, and it did help the hackbench deficit some.
I'm thinking there's an argument to be had the current WAKEUP_PREEMPTION
knob is at the wrong place and should be more or less where you put the
triddle at.
next prev parent reply other threads:[~2023-08-15 23:53 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-10 13:24 [tip:sched/eevdf] [sched/fair] e0c2ff903c: phoronix-test-suite.blogbench.Write.final_score -34.8% regression kernel test robot
2023-08-11 1:11 ` Chen Yu
2023-08-11 2:42 ` Chen Yu
2023-08-14 13:29 ` Peter Zijlstra
2023-08-14 18:32 ` Mike Galbraith
2023-08-15 23:52 ` Peter Zijlstra [this message]
2023-08-16 3:54 ` Mike Galbraith
2023-08-16 12:37 ` Peter Zijlstra
2023-08-16 13:40 ` Peter Zijlstra
2023-08-16 15:38 ` Mike Galbraith
2023-08-16 20:04 ` Peter Zijlstra
2023-08-17 1:25 ` Mike Galbraith
2023-08-17 15:10 ` [tip: sched/core] sched/eevdf: Curb wakeup-preemption tip-bot2 for Peter Zijlstra
2023-08-21 10:39 ` K Prateek Nayak
2023-08-21 15:30 ` Mike Galbraith
2023-08-22 3:03 ` K Prateek Nayak
2023-08-22 6:09 ` Mike Galbraith
2023-08-25 6:41 ` K Prateek Nayak
2023-09-19 9:02 ` [PATCH] sched/fair: Do not wakeup-preempt same-prio SCHED_OTHER tasks Ingo Molnar
2023-09-19 9:48 ` Mike Galbraith
2023-09-22 10:00 ` kernel test robot
2023-09-25 11:07 ` Ingo Molnar
2023-09-25 16:45 ` Chen Yu
2023-08-18 1:09 ` [tip:sched/eevdf] [sched/fair] e0c2ff903c: phoronix-test-suite.blogbench.Write.final_score -34.8% regression Chen Yu
2023-08-22 6:48 ` Chen Yu
2023-08-22 7:07 ` Chen Yu
2023-08-16 3:40 ` Chen Yu
2023-08-16 9:20 ` Peter Zijlstra
2023-08-14 12:49 ` Peter Zijlstra
2023-08-18 1:54 ` Chen Yu
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