From: Gautam H Thaker <gthaker@atl.lmco.com>
To: Matt Mackall <mpm@selenic.com>
Cc: Gautam H Thaker <gautam.h.thaker@lmco.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>
Subject: Re: ~5x greater CPU load for a networked application when using 2.6.15-rt15-smp vs. 2.6.12-1.1390_FC4
Date: Tue, 28 Feb 2006 17:19:04 -0500 [thread overview]
Message-ID: <4404CC58.2020805@atl.lmco.com> (raw)
In-Reply-To: <20060228192738.GO4650@waste.org>
Matt Mackall wrote:
> On Thu, Feb 23, 2006 at 02:55:56PM -0500, Gautam H Thaker wrote:
>
>>The real-time patches at the URL below do a great job of endowing Linux with
>>real-time capabilities.
>>
>>http://people.redhat.com/mingo/realtime-preempt/
>>
>>It has been documented before (and accepted) that this patch turns Linux into
>>a RT kernel but considerably slows down the code paths, esp. thru the I/O
>>subsystem. I want to provide some additional measurements and seek opinions
>>of if it might ever be possible to improve on this situation.
>
>
> Are you using the SLAB or SLOB allocator in the -rt kernel?
lake> grep SL config.2.6.15-rt15-smp
CONFIG_SEMAPHORE_SLEEPERS=y
CONFIG_SLAB=y
# CONFIG_SLOB is not set
--
Gautam H. Thaker
Distributed Processing Lab; Lockheed Martin Adv. Tech. Labs
3 Executive Campus; Cherry Hill, NJ 08002
856-792-9754, fax 856-792-9925 email: gthaker@atl.lmco.com
next prev parent reply other threads:[~2006-02-28 22:19 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-23 19:55 ~5x greater CPU load for a networked application when using 2.6.15-rt15-smp vs. 2.6.12-1.1390_FC4 Gautam H Thaker
2006-02-23 20:15 ` Benjamin LaHaise
2006-02-23 20:58 ` Ingo Molnar
2006-02-23 21:06 ` Nish Aravamudan
2006-02-23 21:08 ` Ingo Molnar
2006-02-23 21:14 ` Nish Aravamudan
2006-02-23 22:07 ` Esben Nielsen
2006-02-24 8:03 ` Jan Engelhardt
2006-02-24 12:11 ` Andrew Morton
2006-02-24 20:06 ` Gautam H Thaker
2006-02-24 20:31 ` Andrew Morton
2006-02-24 20:44 ` Gautam H Thaker
2006-02-24 16:52 ` Theodore Ts'o
2006-02-24 19:25 ` Gautam H Thaker
2006-02-28 19:27 ` Matt Mackall
2006-02-28 22:19 ` Gautam H Thaker [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-07-11 18:08 Jonathan Walsh
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