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Date: Sun, 5 May 2013 13:33:45 -0700
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Frédéric Weisbecker <fweisbec@...il.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
"Paul E. McKenney" <paulmck@...ibm.com>,
Thomas Gleixner <tglx@...utronix.de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL, RFC] Full dynticks, CONFIG_NO_HZ_FULL feature
On Sun, May 5, 2013 at 4:03 AM, Ingo Molnar <mingo@...nel.org> wrote:
>
> Please consider pulling the latest timers-nohz-for-linus git tree from:
Ok, it seems to work for me, so pulled.
However, by "work for me" I mean "doesn't actually seem to make any
difference for me". Maybe I'm odd, but the most common situation is
either a fairly idle machine (in which case the old NOHZ did fine) or
a fairly over-crowded one when I'm running something sufficiently
threaded (in which case the new NOHZ_FULL doesn't do anything either).
So I really hope the "cpu has more than one running thread" case is
getting a lot of attention. Not for 3.10, but right now it seems to
still result in the same old 1kHz timer interrupts..
So I haven't actually found a real load where any of this makes a
noticeable *difference*.
Linus
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