From: Kyle Moffett <mrmacman_g4@mac.com>
To: Andi Kleen <ak@suse.de>
Cc: Venki Pallipadi <venkatesh.pallipadi@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Oleg Nesterov <oleg@tv-sign.ru>,
linux-kernel <linux-kernel@vger.kernel.org>,
davej@codemonkey.org.uk, johnstul@us.ibm.com, mingo@elte.hu,
tglx@linutronix.de
Subject: Re: [PATCH] Add support for deferrable timers (respun-Mar28)
Date: Thu, 29 Mar 2007 07:51:15 -0400 [thread overview]
Message-ID: <7B0DEC32-4413-46CB-BB4D-DC6A1674F2EC@mac.com> (raw)
In-Reply-To: <200703291341.13172.ak@suse.de>
On Mar 29, 2007, at 07:41:12, Andi Kleen wrote:
>> ondemand is the biggest offender and the patch below reduces the
>> number of interrupts by 50% or more (depending on HZ) on different
>> test systems here.
>
> Cool!
>
>> Yes. There are quite a few other timers inside kernel that can be
>> migrated. I will use timer_stats and track others and send in the
>> patches soon.
>
> Longer term it might make sense to even expose this as a option to
> user space. Maybe as a new timer in setitimer()? This might safe
> power with "wiggling desktop applets" too.
Might also be useful to add an extra option to "top" to reduce the
polling frequency if the system is otherwise idle. A fixed 30-sec
timer and a deferrable 1-sec timer or somesuch?
Cheers,
Kyle Moffett
next prev parent reply other threads:[~2007-03-29 11:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200703212353.l2LNrNOj007453@shell0.pdx.osdl.net>
[not found] ` <20070322140532.GA120@tv-sign.ru>
[not found] ` <20070322151817.GA29840@linux-os.sc.intel.com>
[not found] ` <20070322161355.GA160@tv-sign.ru>
2007-03-27 20:43 ` [PATCH] Add support for deferrable timers (respun) Venki Pallipadi
2007-03-27 21:11 ` Oleg Nesterov
2007-03-27 21:55 ` Venki Pallipadi
2007-03-27 22:22 ` Oleg Nesterov
2007-03-27 22:28 ` Oleg Nesterov
2007-03-27 22:36 ` Venki Pallipadi
2007-03-28 23:00 ` [PATCH] Add support for deferrable timers (respun-Mar28) Venki Pallipadi
2007-03-29 0:01 ` Andrew Morton
2007-03-29 0:59 ` Venki Pallipadi
2007-03-29 11:41 ` Andi Kleen
2007-03-29 11:51 ` Kyle Moffett [this message]
2007-03-29 11:58 ` Andi Kleen
2007-03-28 11:06 ` [PATCH] Add support for deferrable timers (respun) Andi Kleen
2007-03-28 16:42 ` Venki Pallipadi
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