From: Ingo Molnar <mingo@elte.hu>
To: Wolfgang Wander <wwc@rentec.com>
Cc: Andrew Morton <akpm@osdl.org>,
kenneth.w.chen@intel.com, arjanv@redhat.com, linux-mm@kvack.org
Subject: Re: [PATCH] Avoiding mmap fragmentation (against 2.6.12-rc4) to
Date: Thu, 12 May 2005 09:07:36 +0200 [thread overview]
Message-ID: <20050512070736.GA15494@elte.hu> (raw)
In-Reply-To: <17026.6227.225173.588629@gargle.gargle.HOWL>
* Wolfgang Wander <wwc@rentec.com> wrote:
> The patch below is against linux-2.6.12-rc4.
>
> Ingo recently introduced a great speedup for allocating new mmaps
> using the free_area_cache pointer which boosts the specweb SSL
> benchmark by 4-5% and causes huge performance increases in thread
> creation.
small correction: 'recently' was more than 2.5 years ago (!). So this
issue is something that hits certain rare workloads. Note that the mmap
speedup was also backported to 2.4 so it is quite widely deployed. This
is the first time anyone complained.
Ingo
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next prev parent reply other threads:[~2005-05-12 7:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-09 13:30 Fw: [Bug 4520] New: /proc/*/maps fragments too quickly compared to Wolfgang Wander
2005-05-09 21:26 ` Andrew Morton
2005-05-09 21:30 ` Arjan van de Ven
2005-05-10 13:23 ` Wolfgang Wander
2005-05-10 15:35 ` Chen, Kenneth W
2005-05-10 18:58 ` Andrew Morton
2005-05-10 19:07 ` Arjan van de Ven
2005-05-10 19:34 ` Chen, Kenneth W
2005-05-10 19:43 ` Andrew Morton
2005-05-10 19:50 ` Wolfgang Wander
2005-05-10 19:57 ` Andrew Morton
2005-05-11 14:36 ` [PATCH] Avoiding mmap fragmentation (against 2.6.12-rc4) to Wolfgang Wander
2005-05-11 15:05 ` Chen, Kenneth W
2005-05-12 0:59 ` Andrew Morton
2005-05-12 1:33 ` Wolfgang Wander
2005-05-12 7:07 ` Ingo Molnar [this message]
2005-05-12 7:14 ` Ingo Molnar
2005-05-10 19:58 ` Fw: [Bug 4520] New: /proc/*/maps fragments too quickly compared to Ingo Molnar
2005-05-10 20:04 ` Wolfgang Wander
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