From: William Lee Irwin III <wli@holomorphy.com>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: Andrew Morton <akpm@digeo.com>, Ed Tomlinson <tomlins@cam.org>,
linux-kernel@vger.kernel.org
Subject: Re: [patch 3/4] slab reclaim balancing
Date: Thu, 26 Sep 2002 07:20:54 -0700 [thread overview]
Message-ID: <20020926142054.GR3530@holomorphy.com> (raw)
In-Reply-To: <3D931608.3040702@colorfullife.com>
At some point in the past, Ed Tomlinson wrote:
>> Slab caches no longer hold onto completely empty pages. Instead, pages
>> are freed as soon as they have zero objects. This is possibly a
>> performance hit for slabs which have constructors, but it's doubtful.
On Thu, Sep 26, 2002 at 04:13:28PM +0200, Manfred Spraul wrote:
> It could be a performance hit for slab with just one object - e.g the
> page sized names cache, used in every syscall that has a path name as a
> parameter.
> Ed, have you benchmarked that there is no noticable slowdown?
> e.g. test the time needed for stat("."). on UP, otherwise the SMP arrays
> would perform the caching.
This might need testing on large-memory 64-bit boxen for that, since
ZONE_NORMAL pressure outweighs many other considerations on my boxen.
Cheers,
Bill
next prev parent reply other threads:[~2002-09-26 14:15 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-26 14:13 [patch 3/4] slab reclaim balancing Manfred Spraul
2002-09-26 14:20 ` William Lee Irwin III [this message]
2002-09-26 15:24 ` Manfred Spraul
2002-09-26 17:37 ` Andrew Morton
2002-09-26 18:47 ` Manfred Spraul
2002-09-26 19:49 ` Andrew Morton
2002-09-26 20:49 ` Manfred Spraul
2002-09-26 21:39 ` Andrew Morton
2002-09-27 0:41 ` Ed Tomlinson
2002-09-27 17:24 ` Manfred Spraul
2002-09-27 18:26 ` Andrew Morton
2002-09-27 19:38 ` Manfred Spraul
2002-09-27 19:52 ` Andrew Morton
2002-09-27 15:59 ` Manfred Spraul
-- strict thread matches above, loose matches on Subject: below --
2002-09-26 4:08 Andrew Morton
2002-09-26 11:39 ` Ed Tomlinson
2002-09-26 15:09 ` Ed Tomlinson
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