From: Jens Axboe <jens.axboe@oracle.com>
To: Nick Piggin <npiggin@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-fsdevel@vger.kernel.org,
Ravikiran G Thirumalai <kiran@scalex86.org>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [rfc][patch] store-free path walking
Date: Fri, 9 Oct 2009 10:54:52 +0200 [thread overview]
Message-ID: <20091009085451.GS9228@kernel.dk> (raw)
In-Reply-To: <20091008132200.GB30316@wotan.suse.de>
On Thu, Oct 08 2009, Nick Piggin wrote:
> This is actualy nice too. My tests were on a 2s8c Barcelona system,
> but this is showing we have a nice serial win on Nehalem as well.
> Actually K8 CPUs have a bit faster lock primitives than earlier
> Intel CPUs I think (closer to Nehalem), so we might see an even
> bigger win with a Core2.
Ran it on another box. This isn't quite a core 2 though, it's a sparc64
(Niagara 2). It has 64 threads, too, but just 8 cores.
2.6.32-rc3 serial
real 0m5.390s
user 0m1.340s
sys 0m2.970s
2.6.32-rc3 parallel
real 0m2.009s
user 0m0.900s
sys 0m2.490s
vfs serial
real 0m4.816s
user 0m1.250s
sys 0m2.270s
vfs parallel
real 0m1.967s
user 0m0.920s
sys 0m1.960s
So it's a win-win there on that platform too.
--
Jens Axboe
next prev parent reply other threads:[~2009-10-09 8:55 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-06 6:49 Latest vfs scalability patch Nick Piggin
2009-10-06 10:14 ` Jens Axboe
2009-10-06 10:26 ` Jens Axboe
2009-10-06 11:10 ` Peter Zijlstra
2009-10-06 12:51 ` Jens Axboe
2009-10-06 12:26 ` Nick Piggin
2009-10-06 12:49 ` Jens Axboe
2009-10-07 8:58 ` [rfc][patch] store-free path walking Nick Piggin
2009-10-07 9:56 ` Jens Axboe
2009-10-07 10:10 ` Nick Piggin
2009-10-12 3:58 ` Nick Piggin
2009-10-12 5:59 ` Nick Piggin
2009-10-12 8:20 ` Jens Axboe
2009-10-12 11:00 ` Jens Axboe
2009-10-13 1:26 ` Christoph Hellwig
2009-10-13 1:52 ` Nick Piggin
2009-10-07 14:56 ` Linus Torvalds
2009-10-07 16:27 ` Linus Torvalds
2009-10-07 16:46 ` Nick Piggin
2009-10-07 19:25 ` Linus Torvalds
2009-10-07 20:34 ` Andi Kleen
2009-10-07 20:51 ` Linus Torvalds
2009-10-07 21:06 ` Andi Kleen
2009-10-07 21:20 ` Linus Torvalds
2009-10-07 21:57 ` Linus Torvalds
2009-10-07 22:22 ` Andi Kleen
2009-10-08 7:39 ` Nick Piggin
2009-10-09 17:53 ` Andi Kleen
2009-10-08 13:12 ` Denys Vlasenko
2009-10-09 7:47 ` Nick Piggin
2009-10-09 17:49 ` Andi Kleen
2009-10-07 16:29 ` Nick Piggin
2009-10-08 12:36 ` Nick Piggin
2009-10-08 12:57 ` Jens Axboe
2009-10-08 13:22 ` Nick Piggin
2009-10-08 13:30 ` Jens Axboe
2009-10-08 18:00 ` Peter Zijlstra
2009-10-09 4:04 ` Nick Piggin
2009-10-09 8:54 ` Jens Axboe [this message]
2009-10-09 9:51 ` Jens Axboe
2009-10-09 10:02 ` Nick Piggin
2009-10-09 10:08 ` Jens Axboe
2009-10-09 10:07 ` Nick Piggin
2009-10-09 3:50 ` Nick Piggin
2009-10-09 6:15 ` David Miller
2009-10-09 10:40 ` Nick Piggin
2009-10-09 11:09 ` Jens Axboe
2009-10-09 10:44 ` Nick Piggin
2009-10-09 10:48 ` Jens Axboe
2009-10-09 23:16 ` Paul E. McKenney
2009-10-15 10:08 ` Latest vfs scalability patch Anton Blanchard
2009-10-15 10:39 ` Nick Piggin
2009-10-15 10:46 ` Anton Blanchard
2009-10-15 10:53 ` Nick Piggin
2009-10-15 11:23 ` Anton Blanchard
2009-10-15 11:41 ` Nick Piggin
2009-10-15 11:48 ` Nick Piggin
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