From: Nigel Cunningham <ncunningham@cyclades.com>
To: vatsa@in.ibm.com
Cc: Con Kolivas <kernel@kolivas.org>,
Kyle Moffett <mrmacman_g4@mac.com>, Adrian Bunk <bunk@stusta.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
ck@vds.kolivas.org, tony@atomide.com,
tuukka.tikkanen@elektrobit.com, george@mvista.com,
Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 5
Date: Mon, 08 Aug 2005 17:05:12 +1000 [thread overview]
Message-ID: <1123484712.3969.485.camel@localhost> (raw)
In-Reply-To: <20050808024430.GA1539@in.ibm.com>
Hi.
On Mon, 2005-08-08 at 12:44, Srivatsa Vaddagiri wrote:
> On Mon, Aug 08, 2005 at 11:30:23AM +1000, Con Kolivas wrote:
> > Tony said he had it lying around somewhere and needed to find time to dust it
> > off and get it up to speed.
>
> PPC64 is on my ToDo list as well. Will take it up after the dyn-tick is cleaned
> up for SMP.
An SMP related area you might want to look at (if you haven't already)
is hotplug cpu support. There seems to be some interaction between
dynticks and hotplug that prevents a CPU from getting to set its state
to CPU_DEAD (despite being in the idle function), while the thread
seeking to down it sits in __cpu_die waiting. I observed the issue while
testing Suspend2 - about 1 in 5 resumes would lock solid or have a big
delay at resume time (never when suspending, interestingly). Turning off
dynticks allowed me to do 15 successful resumes on the trot.
Regards.
Nigel
--
Evolution.
Enumerate the requirements.
Consider the interdependencies.
Calculate the probabilities.
next prev parent reply other threads:[~2005-08-08 7:05 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-03 5:59 [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 3 Con Kolivas
2005-08-03 11:54 ` Jan De Luyck
2005-08-03 12:14 ` Con Kolivas
2005-08-03 14:23 ` Jan De Luyck
2005-08-04 15:03 ` Vojtech Pavlik
2005-08-05 5:12 ` Con Kolivas
2005-08-03 19:20 ` Jim MacBaine
2005-08-03 21:16 ` Con Kolivas
2005-08-03 22:22 ` Jim MacBaine
2005-08-03 22:52 ` Con Kolivas
2005-08-04 5:34 ` Jim MacBaine
2005-08-04 6:59 ` Jim MacBaine
2005-08-04 7:04 ` Con Kolivas
2005-08-04 7:12 ` Con Kolivas
2005-08-04 7:29 ` Tony Lindgren
2005-08-10 20:04 ` Bill Davidsen
2005-08-14 19:47 ` Pavel Machek
2005-08-15 1:43 ` Zwane Mwaikambo
2005-08-15 12:52 ` Con Kolivas
2005-08-15 15:39 ` Zwane Mwaikambo
2005-08-03 19:54 ` Jeffrey Hundstad
2005-08-03 20:07 ` Valdis.Kletnieks
2005-08-03 21:13 ` Con Kolivas
2005-08-03 23:22 ` Christian Leber
2005-08-04 16:25 ` Marc Ballarin
2005-08-04 5:09 ` Jan De Luyck
2005-08-04 5:07 ` Con Kolivas
2005-08-04 5:34 ` Jan De Luyck
2005-08-04 21:15 ` [PATCH] Timer Top was: " Daniel Petrini
2005-08-05 4:05 ` [PATCH] Timer Top tweaks Con Kolivas
2005-08-05 6:46 ` [ck] [PATCH] Timer Top was: i386 No-Idle-Hz aka Dynamic-Ticks 3 Jens Axboe
2005-08-05 12:39 ` Daniel Petrini
2005-08-05 13:55 ` Daniel Petrini
2005-08-04 21:44 ` [PATCH] " Adrian Bunk
2005-08-04 22:12 ` Marc Ballarin
2005-08-05 0:31 ` Con Kolivas
2005-08-05 1:30 ` Paul
2005-08-05 3:25 ` Con Kolivas
2005-08-05 12:37 ` Srivatsa Vaddagiri
2005-08-05 13:08 ` Con Kolivas
2005-08-05 16:39 ` [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 4 Con Kolivas
2005-08-06 17:47 ` Adrian Bunk
2005-08-07 5:12 ` [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 5 Con Kolivas
2005-08-07 16:58 ` Srivatsa Vaddagiri
2005-08-07 23:51 ` Con Kolivas
2005-08-08 1:20 ` Kyle Moffett
2005-08-08 1:30 ` Con Kolivas
2005-08-08 1:45 ` [ck] " Gabriel Devenyi
2005-08-08 2:44 ` Srivatsa Vaddagiri
2005-08-08 7:05 ` Nigel Cunningham [this message]
2005-08-08 7:38 ` Tony Lindgren
2005-08-08 15:06 ` Srivatsa Vaddagiri
2005-08-09 19:36 ` George Anzinger
2005-08-10 14:05 ` Srivatsa Vaddagiri
2005-08-10 22:37 ` George Anzinger
2005-08-11 21:33 ` Bill Davidsen
2005-08-12 15:13 ` George Anzinger
2005-08-08 15:08 ` Folkert van Heusden
2005-08-08 15:16 ` Daniel Petrini
2005-08-08 7:26 ` [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 3 Tony Lindgren
2005-08-08 14:54 ` Srivatsa Vaddagiri
2005-08-08 15:20 ` Tony Lindgren
2005-08-09 14:22 ` Zwane Mwaikambo
2005-08-10 7:46 ` Tony Lindgren
2005-08-09 20:05 ` George Anzinger
2005-08-09 20:22 ` Daniel Petrini
2005-08-10 8:02 ` Tony Lindgren
2005-08-10 22:40 ` George Anzinger
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