From: Mike Galbraith <bitbucket@online.de>
To: Ethan Zhao <ethan.kernel@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
rjw@sisk.pl, Daniel Lezcano <daniel.lezcano@linaro.org>,
linux-pm@vger.kernel.org, Len Brown <lenb@kernel.org>
Subject: Re: [PATCH V3]hrtimer: Fix a performance regression by disable reprogramming in remove_hrtimer
Date: Thu, 12 Dec 2013 15:42:02 +0100 [thread overview]
Message-ID: <1386859322.6056.83.camel@marge.simpson.net> (raw)
In-Reply-To: <CABawtvNf5k8pKY6ioa8GdUzOn7h3aOBsWhSUNgmfuQSj+xtUbQ@mail.gmail.com>
On Thu, 2013-12-12 at 22:14 +0800, Ethan Zhao wrote:
> Mike,
> it seems the IPI issue got root cause (cpu hardware errata ) now ?
> I only catch some pieces of the mails, is that to say the crazy horse
> made by Intel will wake up unexpected, and eat too much reschedule
> IPI, then the horse got hotter, performance down, and so the fix would
> be a 'CFLUSH' to all the buggy CPU, is that right ?
You're mixing a couple different issues together, but yeah, close
enough. The barking amazonian tree guppy is being saved as we speak.
-Mike
next prev parent reply other threads:[~2013-12-12 14:42 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-27 20:04 ethan.kernel
2013-07-29 10:18 ` Thomas Gleixner
2013-07-29 11:57 ` Peter Zijlstra
2013-08-08 7:32 ` ethan.zhao
2013-09-05 6:36 ` Mike Galbraith
[not found] ` <20130905111428.GB23362@gmail.com>
[not found] ` <1378386697.6567.9.camel@marge.simpson.net>
[not found] ` <20130905133750.GA26637@gmail.com>
[not found] ` <1378445942.5434.31.camel@marge.simpson.net>
[not found] ` <20130909122325.GX31370@twins.programming.kicks-ass.net>
[not found] ` <1378730538.5586.30.camel@marge.simpson.net>
2013-09-09 13:30 ` Peter Zijlstra
2013-09-09 13:46 ` Peter Zijlstra
2013-09-11 8:56 ` Peter Zijlstra
2013-09-11 10:25 ` Mike Galbraith
2013-10-04 12:06 ` Ethan Zhao
2013-10-07 4:41 ` Mike Galbraith
2013-10-07 4:57 ` Ethan Zhao
2013-12-12 14:14 ` Ethan Zhao
2013-12-12 14:42 ` Mike Galbraith [this message]
[not found] ` <CABawtvP4oLuvHOS3prbbgPShXVziV_wTo7i6KCqJ9KkoVdz0ag@mail.gmail.com>
2013-07-30 9:35 ` Peter Zijlstra
2013-07-30 11:44 ` Ethan Zhao
2013-07-30 11:59 ` Peter Zijlstra
2013-08-03 6:55 ` ethan
2013-08-03 7:37 ` ethan
2013-08-06 7:29 ` Mike Galbraith
2013-08-06 7:46 ` Mike Galbraith
2013-08-08 4:31 ` ethan.zhao
2013-08-08 5:29 ` Mike Galbraith
2013-08-08 5:51 ` Mike Galbraith
2013-08-08 9:04 ` ethan.zhao
2013-08-08 9:05 ` ethan.zhao
2013-08-08 12:14 ` Mike Galbraith
2013-08-07 8:25 ` Mike Galbraith
2013-08-08 4:05 ` Mike Galbraith
2013-08-08 15:02 ` ethan.zhao
2013-08-09 6:52 ` Mike Galbraith
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