From: Andi Kleen <ak@suse.de>
To: Anton Blanchard <anton@samba.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: speed difference between using hard-linked and modular drives?
Date: Sat, 10 Nov 2001 06:09:09 +0100 [thread overview]
Message-ID: <20011110060909.A1015@wotan.suse.de> (raw)
In-Reply-To: <p731yj8kgvw.fsf@amdsim2.suse.de> <20011109110532.B6822@krispykreme> <20011109064540.A13498@wotan.suse.de> <20011108.220444.95062095.davem@redhat.com> <20011109073946.A19373@wotan.suse.de> <20011110155603.B767@krispykreme>
In-Reply-To: <20011110155603.B767@krispykreme>; from anton@samba.org on Sat, Nov 10, 2001 at 03:56:03PM +1100
> You can see the average depth of the get_free_page hash is way too deep.
> I agree there are a lot of pagecache pages (17GB in the gfp test and 21GB
> in the vmalloc test), but we have to make use of the 32GB of RAM :)
Thanks for the information. I guess the fix for your case would be then
to use the bootmem allocator for allocating the page table hash.
It should have no problems with very large continuous tables, assuming
you have the (physically continuous) memory.
Another possibility would be to switch to some tree/skiplist, but that's
probably too radical and may have other problems on smaller boxes.
-Andi
next prev parent reply other threads:[~2001-11-10 5:09 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.33.0111081802380.15975-100000@localhost.localdomain.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.33.0111081836080.15975-100000@localhost.localdomain.suse.lists.linux.kernel>
2001-11-08 23:00 ` speed difference between using hard-linked and modular drives? Andi Kleen
2001-11-09 0:05 ` Anton Blanchard
2001-11-09 5:45 ` Andi Kleen
2001-11-09 6:04 ` David S. Miller
2001-11-09 6:39 ` Andi Kleen
2001-11-09 6:54 ` Andrew Morton
2001-11-09 7:17 ` David S. Miller
2001-11-09 7:16 ` Andrew Morton
2001-11-09 7:24 ` David S. Miller
2001-11-09 8:21 ` Ingo Molnar
2001-11-09 7:35 ` Andrew Morton
2001-11-09 7:44 ` David S. Miller
2001-11-09 7:14 ` David S. Miller
2001-11-09 7:16 ` David S. Miller
2001-11-09 12:59 ` Alan Cox
2001-11-09 12:54 ` David S. Miller
2001-11-09 13:15 ` Philip Dodd
2001-11-09 13:26 ` David S. Miller
2001-11-09 20:45 ` Mike Fedyk
2001-11-09 13:17 ` Andi Kleen
2001-11-09 13:25 ` David S. Miller
2001-11-09 13:39 ` Andi Kleen
2001-11-09 13:41 ` David S. Miller
2001-11-10 5:20 ` Anton Blanchard
2001-11-10 4:56 ` Anton Blanchard
2001-11-10 5:09 ` Andi Kleen [this message]
2001-11-10 13:29 ` David S. Miller
2001-11-10 13:44 ` David S. Miller
2001-11-10 13:52 ` David S. Miller
2001-11-10 14:29 ` Numbers: ext2/ext3/reiser Performance (ext3 is slow) Oktay Akbal
2001-11-10 14:47 ` arjan
2001-11-10 17:41 ` Oktay Akbal
2001-11-10 17:56 ` Arjan van de Ven
2001-11-15 17:24 ` Stephen C. Tweedie
2001-11-12 16:59 ` [patch] arbitrary size memory allocator, memarea-2.4.15-D6 Ingo Molnar
2001-11-12 18:19 ` Jeff Garzik
2001-11-12 23:26 ` Ingo Molnar
2001-11-13 15:59 ` Riley Williams
2001-11-14 20:49 ` Tom Gall
2001-11-15 1:11 ` Anton Blanchard
2001-11-17 18:00 ` Eric W. Biederman
2001-11-09 3:12 ` speed difference between using hard-linked and modular drives? Rusty Russell
2001-11-09 5:59 ` Andi Kleen
2001-11-09 11:16 ` Helge Hafting
2001-11-12 9:59 ` Rusty Russell
2001-11-12 23:23 ` David S. Miller
2001-11-12 23:14 ` Rusty Russell
2001-11-13 1:30 ` Mike Fedyk
2001-11-13 1:15 ` David Lang
2001-11-08 16:01 Roy Sigurd Karlsbakk
2001-11-08 17:02 ` Ingo Molnar
2001-11-08 17:37 ` Ingo Molnar
2001-11-08 23:59 ` Anton Blanchard
2001-11-09 5:11 ` Keith Owens
2001-11-10 3:35 ` Anton Blanchard
2001-11-10 7:26 ` Keith Owens
2001-11-08 17:53 ` Robert Love
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