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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Tony Lindgren <tony@atomide.com>, Mike Galbraith <efault@gmx.de>
Subject: Re: [RFC PATCH] check_preempt_tick should not compare vruntime with wall time
Date: Mon, 13 Sep 2010 10:51:38 -0700	[thread overview]
Message-ID: <AANLkTi=8m4g01wZPacySoF7U0PevTNVgJoZZrHiUD-pN@mail.gmail.com> (raw)
In-Reply-To: <20100913174533.GA15653@Krystal>

On Mon, Sep 13, 2010 at 10:45 AM, Mathieu Desnoyers
<mathieu.desnoyers@efficios.com> wrote:
>
> FWIW, Xorg and firefox feel _much more_ responsive with the fix I propose when
> running with a make -j10. The system is even usable with a make -j20 on my UP
> machine, even though I can start feeling a some lag. This is probably a more
> important, yet less scientific, result.

I'll test that myself (but in a bit - I need to go do voter
registration and socsec update first, though - I became a US citizen
last week).

Because yes, that's the reason I'm personally interested in your
scheduler latency work: I think our X behavior under load is pitiful
(I do "make -j16" on my dual-core with HT Core i5, and web browsong
shouldn't start to lag as much as it does just because I overcommit
the CPU a bit). So if this makes a noticeable difference, I think it's
very important.

                       Linus

  reply	other threads:[~2010-09-13 17:52 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-11 17:37 [RFC patch 0/2] sched: dynamically adapt granularity with nr_running Mathieu Desnoyers
2010-09-11 17:37 ` [RFC patch 1/2] " Mathieu Desnoyers
2010-09-11 18:57   ` Peter Zijlstra
2010-09-11 19:21     ` Linus Torvalds
2010-09-11 20:36       ` Peter Zijlstra
2010-09-11 20:45         ` Peter Zijlstra
2010-09-11 20:52           ` Linus Torvalds
2010-09-12  9:07             ` Peter Zijlstra
2010-09-11 20:48         ` Linus Torvalds
2010-09-12  9:06           ` Peter Zijlstra
2010-09-12  9:14             ` Peter Zijlstra
2010-09-12 20:39               ` Mathieu Desnoyers
2010-09-13 12:54                 ` Peter Zijlstra
2010-09-12 20:34             ` Mathieu Desnoyers
2010-09-13 12:53               ` Peter Zijlstra
2010-09-13  4:35             ` Mike Galbraith
2010-09-13  8:41               ` Peter Zijlstra
2010-09-13 11:22                 ` Ingo Molnar
2010-09-13 13:52                 ` Steven Rostedt
2010-09-13 13:54                   ` Peter Zijlstra
2010-09-13 14:02                     ` Peter Zijlstra
2010-09-13 14:21                       ` Ingo Molnar
2010-09-11 20:52         ` Mathieu Desnoyers
2010-09-11 19:57     ` Mathieu Desnoyers
2010-09-12 10:41       ` Peter Zijlstra
2010-09-12 20:37         ` Mathieu Desnoyers
2010-09-13 12:53           ` Peter Zijlstra
2010-09-13 13:15             ` Peter Zijlstra
2010-09-13 13:56               ` Mathieu Desnoyers
2010-09-13 14:16                 ` Peter Zijlstra
2010-09-13 14:43                   ` Steven Rostedt
2010-09-13 15:25                     ` Mathieu Desnoyers
2010-09-13 15:39                       ` Steven Rostedt
2010-09-13 16:16                   ` [RFC PATCH] check_preempt_tick should not compare vruntime with wall time Mathieu Desnoyers
2010-09-13 16:36                     ` Linus Torvalds
2010-09-13 17:45                       ` Mathieu Desnoyers
2010-09-13 17:51                         ` Linus Torvalds [this message]
2010-09-13 18:01                           ` Mathieu Desnoyers
2010-09-13 18:10                           ` Steven Rostedt
2010-09-13 18:03                         ` Ingo Molnar
2010-09-13 18:19                           ` Mathieu Desnoyers
2010-09-13 18:23                             ` [PATCH] sched: Improve latencies under load by decreasing minimum scheduling granularity Ingo Molnar
2010-09-13 18:28                               ` Joe Perches
2010-09-13 19:44                               ` Linus Torvalds
2010-09-13 20:00                                 ` Ingo Molnar
2010-09-13 18:19                         ` [RFC PATCH] check_preempt_tick should not compare vruntime with wall time Ingo Molnar
2010-09-13 17:36                     ` Ingo Molnar
2010-09-13 17:56                       ` Mathieu Desnoyers
2010-09-14  2:10                     ` Mike Galbraith
2010-09-13 14:44                 ` [RFC patch 1/2] sched: dynamically adapt granularity with nr_running Mike Galbraith
     [not found]               ` <1284386179.10436.6.camel@marge.simson.net>
2010-09-13 15:53                 ` Peter Zijlstra
2010-09-13 18:04                   ` [RFC][PATCH] sched: Improve tick preemption Peter Zijlstra
2010-09-14  2:27                   ` [RFC patch 1/2] sched: dynamically adapt granularity with nr_running Mike Galbraith
2010-09-12  6:14   ` Ingo Molnar
2010-09-12  7:21     ` Mike Galbraith
2010-09-12 18:16       ` Mathieu Desnoyers
2010-09-13  4:13         ` Mike Galbraith
2010-09-13  6:41           ` Ingo Molnar
2010-09-13  7:08             ` Mike Galbraith
2010-09-13  7:35               ` Mike Galbraith
2010-09-13  8:35               ` Peter Zijlstra
2010-09-13  9:16                 ` Mike Galbraith
2010-09-13  9:37                   ` Peter Zijlstra
2010-09-13  9:50                     ` Mike Galbraith
2010-09-13  9:55                       ` Peter Zijlstra
2010-09-13 10:06                         ` Mike Galbraith
2010-09-13 10:45                         ` Peter Zijlstra
2010-09-13 11:43                           ` Peter Zijlstra
2010-09-13 11:49                             ` Peter Zijlstra
2010-09-13 12:32                             ` Mike Galbraith
2010-09-13 20:19             ` Mathieu Desnoyers
2010-09-13 20:56               ` Mathieu Desnoyers
2010-09-12 18:13     ` Mathieu Desnoyers
2010-09-12 23:44       ` Mathieu Desnoyers
2010-09-11 17:37 ` [RFC patch 2/2] sched: sleepers coarse granularity on wakeup Mathieu Desnoyers
2010-09-12 12:44 ` [RFC patch 0/2] sched: dynamically adapt granularity with nr_running Peter Zijlstra

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