From: Dave Jones <davej@redhat.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Ingo Molnar <mingo@elte.hu>, Adrian Bunk <bunk@stusta.de>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [patch] debugging feature: SysRq-Q to print timers
Date: Mon, 18 Dec 2006 18:45:49 -0500 [thread overview]
Message-ID: <20061218234549.GB32353@redhat.com> (raw)
In-Reply-To: <20061218153103.57860bf8.akpm@osdl.org>
On Mon, Dec 18, 2006 at 03:31:03PM -0800, Andrew Morton wrote:
> On Sat, 16 Dec 2006 08:56:58 +0100
> Ingo Molnar <mingo@elte.hu> wrote:
>
> > ----------------->
> > Subject: [patch] debugging feature: SysRq-Q to print timers
> > From: Ingo Molnar <mingo@elte.hu>
> >
> > add SysRq-Q to print pending timers and other timer info.
>
> I must say that I've never needed this feature or /proc/timer-list, and I
> don't recall ever having seen anyone request it, nor get themselves into a
> situation where they needed it.
/proc/timer-list is useful for profiling applications doing excessive wakeups.
With the move towards being tickless, this is more important than ever,
and giving users the right tools to find these problems themselves is important.
Dave
--
http://www.codemonkey.org.uk
next prev parent reply other threads:[~2006-12-18 23:47 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-15 6:59 2.6.20-rc1-mm1 Andrew Morton
2006-12-15 6:59 ` BUG: NMI Watchdog detected LOCKUP (was: 2.6.20-rc1-mm1) Tilman Schmidt
2006-12-19 18:52 ` Thomas Gleixner
2006-12-19 19:56 ` [patch] hrtimers: add state tracking, fix Ingo Molnar
2006-12-20 1:38 ` Tilman Schmidt
2006-12-20 20:05 ` Tilman Schmidt
2006-12-15 14:46 ` OOPS: deref 0x14 at pdc_port_start+0x82 [Was: 2.6.20-rc1-mm1] Jiri Slaby
2006-12-15 19:24 ` Andrew Morton
2006-12-15 22:49 ` Jiri Slaby
2006-12-15 20:39 ` 2.6.20-rc1-mm1 Damien Wyart
2006-12-15 21:01 ` 2.6.20-rc1-mm1 Andrew Morton
2006-12-17 11:07 ` 2.6.20-rc1-mm1 Damien Wyart
2006-12-18 8:03 ` 2.6.20-rc1-mm1 Laurent Riffard
2006-12-18 18:35 ` 2.6.20-rc1-mm1 Damien Wyart
2006-12-19 23:29 ` 2.6.20-rc1-mm1 Luben Tuikov
2006-12-18 7:44 ` 2.6.20-rc1-mm1 Jens Axboe
2006-12-15 23:26 ` WARNING (1) at .../arch/i386/mm/highmem.c:49 [Was: 2.6.20-rc1-mm1] Jiri Slaby
2006-12-16 0:16 ` Andrew Morton
2006-12-16 0:04 ` 2.6.20-rc1-mm1: unused sysrq_timer_list_show() Adrian Bunk
2006-12-16 7:56 ` [patch] debugging feature: SysRq-Q to print timers Ingo Molnar
2006-12-18 23:31 ` Andrew Morton
2006-12-18 23:45 ` Dave Jones [this message]
2006-12-19 0:00 ` Andrew Morton
2006-12-19 12:01 ` Ingo Molnar
2006-12-16 12:37 ` (Cross) compiling fails on first try (was Re: 2.6.20-rc1-mm1) Jan Dittmer
2006-12-16 13:56 ` [-mm patch] drivers/ide/pci/tc86c001.c: make a function static Adrian Bunk
2006-12-16 14:18 ` Alan
2006-12-17 18:08 ` Sergei Shtylyov
2006-12-17 20:52 ` Sergei Shtylyov
2006-12-16 13:56 ` [-mm patch] make uio_irq_handler() static Adrian Bunk
2006-12-20 6:09 ` Greg KH
2006-12-16 13:56 ` [-mm patch] drivers/video/{s3fb,svgalib}.c: possible cleanups Adrian Bunk
2006-12-16 17:39 ` Randy Dunlap
2006-12-16 18:16 ` Ondrej Zajicek
2006-12-16 13:57 ` [-mm patch] mm/vmscan.c: make a function static Adrian Bunk
2006-12-16 19:30 ` [-mm patch] noinitramfs cleanup Frederik Deweerdt
2006-12-18 13:38 ` [-mm patch] kill pxa2xx Kconfig warning Frederik Deweerdt
2006-12-18 20:06 ` 2.6.20-rc1-mm1 Bartlomiej Zolnierkiewicz
2006-12-19 0:29 ` 2.6.20-rc1-mm1 Randy Dunlap
2006-12-19 0:42 ` 2.6.20-rc1-mm1 Andrew Morton
2006-12-21 18:35 ` [-mm patch] ptrace: make {put,get}reg work again for gs and fs Frederik Deweerdt
2006-12-21 19:22 ` Jeremy Fitzhardinge
2006-12-21 20:53 ` Frederik Deweerdt
2006-12-21 21:59 ` Frederik Deweerdt
2006-12-22 2:00 ` Jeremy Fitzhardinge
[not found] ` <20061221181108.6cede9ba.akpm@osdl.org>
2006-12-22 6:06 ` Frederik Deweerdt
[not found] ` <20061221225414.de09c7df.akpm@osdl.org>
2006-12-22 7:00 ` Jeremy Fitzhardinge
2006-12-22 8:05 ` Frederik Deweerdt
2006-12-22 6:52 ` Jeremy Fitzhardinge
2006-12-22 6:55 ` Jeremy Fitzhardinge
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