From: Anton Blanchard <anton@samba.org>
To: Hanna Linder <hannal@us.ibm.com>
Cc: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>,
lse-tech@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [Lse-tech] Re: 10.31 second kernel compile
Date: Sat, 16 Mar 2002 16:27:30 +1100 [thread overview]
Message-ID: <20020316052730.GB9396@krispykreme> (raw)
In-Reply-To: <20020313085217.GA11658@krispykreme> <460695164.1016001894@[10.10.2.3]> <20020314112725.GA2008@krispykreme> <13360000.1016130109@w-hlinder.des>
In-Reply-To: <13360000.1016130109@w-hlinder.des>
Hi,
> There are two dcache patches. The one I wrote based on Al Viro's
> suggestion for fast path walking is especially good for NUMA
> systems hit by cache bouncing (d_lookup is the main culprit in
> the dcache). Martin had some initial results that looked very
> good.
I gave the patch a go, here is the before and after for the kernel
compile benchmark. As you can see d_lookup and atomic_dec_and_lock
have both dropped. Since the main bottleneck for us is still the
ppc64 mm code, we didnt see a noticable drop in wall clock time.
It would be interesting to try the patch on a large specweb run,
Ive seen the dcache lock become a problem when running 8 way specweb.
Anton
before:
155912 total 0.0550
114562 .cpu_idle
12615 .local_flush_tlb_range
8476 .local_flush_tlb_page
2576 .insert_hpte_into_group
1980 .do_anonymous_page
1813 .lru_cache_add
1390 .d_lookup
1320 .__copy_tofrom_user
1140 .save_remaining_regs
612 .rmqueue
517 .atomic_dec_and_lock
492 .do_page_fault
444 .copy_page
438 .__free_pages_ok
375 .set_page_dirty
350 .zap_page_range
314 .schedule
270 .__find_get_page
245 .page_cache_release
233 .lru_cache_del
231 .hvc_poll
215 .sys_brk
after:
152844 total 0.0539
113527 .cpu_idle
12740 .local_flush_tlb_range
7701 .local_flush_tlb_page
2564 .insert_hpte_into_group
2099 .do_anonymous_page
1780 .lru_cache_add
1230 .__copy_tofrom_user
1082 .save_remaining_regs
581 .rmqueue
486 .__free_pages_ok
479 .do_page_fault
465 .copy_page
371 .zap_page_range
333 .atomic_dec_and_lock
332 .set_page_dirty
286 .__find_get_page
275 .__d_lookup
263 .path_lookup
250 .page_cache_release
221 .lru_cache_del
218 .sys_brk
215 .__flush_dcache_icache
next prev parent reply other threads:[~2002-03-16 5:30 UTC|newest]
Thread overview: 137+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-13 8:52 Anton Blanchard
2002-03-13 14:44 ` Martin J. Bligh
2002-03-13 21:44 ` [Lse-tech] " Dave Hansen
2002-03-14 1:07 ` Keith Owens
2002-03-14 11:27 ` Anton Blanchard
2002-03-14 13:16 ` [Lse-tech] " Dipankar Sarma
2002-03-17 13:12 ` some RCU dcache and ratcache results Anton Blanchard
2002-03-14 13:21 ` [Lse-tech] Re: 10.31 second kernel compile Momchil Velikov
2002-03-14 18:33 ` Daniel Phillips
2002-03-15 12:16 ` Chris Wedgwood
2002-03-16 5:12 ` Anton Blanchard
2002-03-15 18:20 ` Linus Torvalds
2002-03-16 15:24 ` Daniel Phillips
2002-03-16 19:01 ` Linus Torvalds
2002-03-16 22:25 ` Daniel Phillips
2002-03-19 16:35 ` Bill Davidsen
2002-03-18 3:07 ` David S. Miller
2002-03-16 11:55 ` Paul Mackerras
2002-03-16 17:25 ` Rik van Riel
2002-03-16 17:57 ` yodaiken
2002-03-16 18:06 ` Linus Torvalds
2002-03-16 18:35 ` yodaiken
2002-03-16 18:45 ` Linus Torvalds
2002-03-16 18:57 ` yodaiken
2002-03-16 19:16 ` Linus Torvalds
2002-03-16 19:53 ` yodaiken
2002-03-16 20:02 ` Linus Torvalds
2002-03-16 20:25 ` yodaiken
2002-03-27 1:07 ` Richard Henderson
2002-03-16 19:43 ` David Mosberger
2002-03-16 19:58 ` Linus Torvalds
2002-03-16 20:08 ` yodaiken
2002-03-16 20:23 ` Linus Torvalds
2002-03-16 20:36 ` David Mosberger
2002-03-16 20:46 ` Linus Torvalds
2002-03-17 1:09 ` Paul Mackerras
2002-03-17 2:08 ` Linus Torvalds
2002-03-16 20:53 ` Alan Cox
2002-03-14 19:05 ` Linus Torvalds
2002-03-19 16:40 ` Bill Davidsen
2002-03-14 18:21 ` Hanna Linder
2002-03-16 5:27 ` Anton Blanchard [this message]
2002-03-15 7:12 ` Chris Wedgwood
2002-03-16 6:15 ` 7.52 " Anton Blanchard
2002-03-16 6:42 ` [Lse-tech] " Gerrit Huizenga
2002-03-17 12:34 ` Anton Blanchard
2002-03-17 22:09 ` Theodore Tso
2002-03-18 7:04 ` Jeff Garzik
2002-03-19 18:28 ` Theodore Tso
2002-03-16 8:05 ` Linus Torvalds
2002-03-16 11:54 ` yodaiken
2002-03-16 11:04 ` Paul Mackerras
2002-03-16 18:32 ` Linus Torvalds
2002-03-17 2:00 ` Paul Mackerras
2002-03-17 2:40 ` Linus Torvalds
2002-03-17 2:50 ` M. Edward Borasky
2002-03-18 15:08 ` 0.73 " snpe
2002-03-18 19:42 ` 7.52 " Cort Dougan
2002-03-18 20:04 ` Linus Torvalds
2002-03-18 20:23 ` Linus Torvalds
2002-03-18 21:50 ` Rene Herman
2002-03-18 22:36 ` Cort Dougan
2002-03-18 22:47 ` Linus Torvalds
2002-03-18 22:56 ` Cort Dougan
2002-03-18 23:52 ` Paul Mackerras
2002-03-19 0:57 ` Dave Jones
2002-03-19 3:35 ` Jeff Garzik
2002-03-19 0:22 ` David S. Miller
2002-03-19 0:27 ` Cort Dougan
2002-03-19 0:27 ` David S. Miller
2002-03-19 0:36 ` Cort Dougan
2002-03-19 0:38 ` David S. Miller
2002-03-19 1:28 ` Davide Libenzi
2002-03-19 2:42 ` Paul Mackerras
2002-03-27 2:53 ` Richard Henderson
2002-04-02 4:32 ` Linus Torvalds
2002-04-02 10:50 ` Pablo Alcaraz
2002-03-18 21:34 ` Cort Dougan
2002-03-18 22:00 ` Linus Torvalds
2002-03-18 19:37 ` Cort Dougan
2002-03-16 17:37 ` [Lse-tech] " Martin J. Bligh
2002-03-17 1:45 ` Keith Owens
2002-03-17 13:54 ` David Woodhouse
2002-03-19 16:49 ` Bill Davidsen
2002-03-16 18:57 ` Daniel Egger
2002-03-17 8:18 ` Mike Galbraith
2002-03-17 15:29 ` Martin J. Bligh
[not found] <20020316113536.A19495@hq.fsmlabs.com.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.33.0203161037160.31913-100000@penguin.transmeta.com.suse.lists.linux.kernel>
[not found] ` <20020316115726.B19495@hq.fsmlabs.com.suse.lists.linux.kernel>
2002-03-16 19:32 ` [Lse-tech] Re: 10.31 " Andi Kleen
2002-03-16 19:57 ` yodaiken
2002-03-16 20:05 ` Andi Kleen
2002-03-16 20:12 ` yodaiken
2002-03-16 20:34 ` Linus Torvalds
2002-03-16 21:39 ` yodaiken
2002-03-16 21:49 ` Linus Torvalds
2002-03-17 14:38 ` Kai Henningsen
2002-03-17 18:20 ` Alan Cox
2002-03-16 22:00 ` Alan Cox
2002-03-16 21:49 ` Linus Torvalds
2002-03-16 23:10 ` yodaiken
2002-03-17 1:17 ` rddunlap
2002-03-17 3:34 ` Alan Cox
2002-03-17 14:52 ` Kai Henningsen
2002-03-17 21:00 ` yodaiken
2002-03-19 12:06 ` Pavel Machek
2002-03-19 21:12 ` yodaiken
2002-03-19 22:09 ` Chris Friesen
2002-03-19 22:15 ` yodaiken
2002-03-20 4:25 ` Bill Davidsen
2002-03-16 20:27 ` Richard Gooch
2002-03-16 20:47 ` yodaiken
2002-03-16 21:05 ` Richard Gooch
2002-03-16 23:34 ` yodaiken
2002-03-17 13:48 ` Rik van Riel
2002-03-17 2:50 ` Chris Wedgwood
2002-03-17 3:43 ` Alan Cox
2002-03-17 4:12 ` Chris Wedgwood
2002-03-17 4:31 ` Alan Cox
2002-03-16 20:14 ` Linus Torvalds
2002-03-16 20:22 ` Andi Kleen
2002-03-19 4:34 ` Rusty Russell
2002-03-17 13:23 ` Rik van Riel
2002-03-17 18:16 ` Linus Torvalds
2002-03-17 23:01 ` Davide Libenzi
2002-03-18 0:53 ` Rik van Riel
2002-03-18 1:13 ` Davide Libenzi
2002-03-18 1:31 ` Linus Torvalds
2002-03-18 1:56 ` Davide Libenzi
2002-03-18 1:40 ` Mike Fedyk
2002-03-18 1:48 ` Davide Libenzi
2002-03-24 21:12 ` Rogier Wolff
2002-03-24 21:35 ` Andrew Morton
2002-03-24 22:54 ` Nick Craig-Wood
2002-03-24 23:41 ` Andi Kleen
2002-03-25 6:40 ` Martin J. Bligh
2002-03-16 20:36 ` Richard Gooch
2002-03-16 20:38 ` Linus Torvalds
2002-03-16 20:51 ` Richard Gooch
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