linux-kernel - Re: [ANNOUNCE] 3.12.8-rt11

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Message-ID: <1390814053.5425.145.camel@marge.simpson.net>
Date:	Mon, 27 Jan 2014 10:14:13 +0100
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Carsten Emde <C.Emde@...dl.org>
Cc:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>, rostedt@...dmis.org,
	John Kacur <jkacur@...hat.com>
Subject: Re: [ANNOUNCE] 3.12.8-rt11

On Mon, 2014-01-27 at 05:54 +0100, Carsten Emde wrote: 
> It is well conceivable that this or one of the next 3.12.X-rtY 
> versions will remind us of the legendary 2.6.33 RT kernel.

Hm.  I wonder if HRTIMER_SOFTIRQ being processed alone, and at maxed out
priority wouldn't beat 2.6.33-rt on your boxen.  My 64 core box running
-rt9 (minus nohz_full patches) does beat it.

Two hacks attached if you're curious too, one to optionally resurrect
sirq threads, another to kick obnoxious idle_balance().. below the belt.

-Mike

View attachment "softirq-resurrect-threads.patch" of type "text/x-patch" (11445 bytes)

View attachment "sched-further-limit-idle_balance.patch" of type "text/x-patch" (1588 bytes)