From: William Lee Irwin III <wli@holomorphy.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [RFC] Convert pgtable cache to slab
Date: Wed, 13 Oct 2004 18:59:56 +0000 [thread overview]
Message-ID: <20041013185956.GA9106@holomorphy.com> (raw)
In-Reply-To: <yq1zn2qtpyo.fsf@wilson.mkp.net>
On Wed, Oct 13, 2004 at 02:47:43PM -0400, Martin K. Petersen wrote:
> This patch makes the page table cache on IA-64 use the slab instead of
> standard page allocations. It's based upon Bill Irwin's code for
> ppc64.
> With this patch I got a significant improvement in page fault time.
> Standard 2.4.x was about 700ns on average. Generic 2.6.9rc4 is 3-4
> usec, whereas the slabified pgtcache drops us back down to 600-700 ns.
> Tested on zx1 and sn2.
> The biggest caveat is that I've had to postpone setting up the gate
> page until the pgt slab has been initialized. That wasn't an issue
> with the existing page-based allocation scheme. David - how do you
> prefer I handle this?
Nice! I got reports that it would not be beneficial when I thought
about going over this earlier. I suppose it's a small vindication
of my methods to see the original objection contradicted here. =)
-- wli
next prev parent reply other threads:[~2004-10-13 18:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-13 18:47 [RFC] Convert pgtable cache to slab Martin K. Petersen
2004-10-13 18:57 ` Jesse Barnes
2004-10-13 18:59 ` William Lee Irwin III [this message]
2004-10-13 19:07 ` Luck, Tony
2004-10-13 19:28 ` Jesse Barnes
2004-10-13 19:32 ` Martin K. Petersen
2004-10-13 19:32 ` Luck, Tony
2004-10-13 19:42 ` Martin K. Petersen
2004-10-13 19:49 ` Robin Holt
2004-10-13 19:50 ` Robin Holt
2004-10-13 20:23 ` Luck, Tony
2004-10-13 20:34 ` Martin K. Petersen
2004-10-13 20:37 ` Martin K. Petersen
2004-10-14 7:44 ` David Mosberger
2004-10-14 10:27 ` William Lee Irwin III
2004-10-14 11:00 ` David Mosberger
2004-10-14 11:07 ` Robin Holt
2004-10-14 11:10 ` David Mosberger
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