From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Andi Kleen <ak@suse.de>
Cc: jasonp@boo.net, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] page coloring for 2.5.59 kernel, version 1
Date: Tue, 28 Jan 2003 08:49:34 -0800 [thread overview]
Message-ID: <1498630000.1043772571@titus> (raw)
In-Reply-To: <p73k7gpz0vu.fsf@oldwotan.suse.de>
> The main advantage of cache coloring normally is that benchmarks
> should get stable results. Without it a benchmark result can vary based on
> random memory allocation patterns.
>
> Just having stable benchmarks may be worth it.
OK, I'll try to hack the scripts to measure standard deviation between runs
as well.
> I suspect the benefit will vary a lot based on the CPU. Your caches may
> have good enough associativity. On other CPUs it may make much more difference.
IIRC, P3's are 4 way associative ... people had been saying that this would
make more of a difference on machines with larger caches, which is why I ran
it ... 2Mb is fairly big for ia32.
M.
WARNING: multiple messages have this Message-ID (diff)
From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Andi Kleen <ak@suse.de>
Cc: jasonp@boo.net, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] page coloring for 2.5.59 kernel, version 1
Date: Tue, 28 Jan 2003 08:49:34 -0800 [thread overview]
Message-ID: <1498630000.1043772571@titus> (raw)
In-Reply-To: <p73k7gpz0vu.fsf@oldwotan.suse.de>
> The main advantage of cache coloring normally is that benchmarks
> should get stable results. Without it a benchmark result can vary based on
> random memory allocation patterns.
>
> Just having stable benchmarks may be worth it.
OK, I'll try to hack the scripts to measure standard deviation between runs
as well.
> I suspect the benefit will vary a lot based on the CPU. Your caches may
> have good enough associativity. On other CPUs it may make much more difference.
IIRC, P3's are 4 way associative ... people had been saying that this would
make more of a difference on machines with larger caches, which is why I ran
it ... 2Mb is fairly big for ia32.
M.
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next prev parent reply other threads:[~2003-01-28 16:40 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3.0.6.32.20030127224726.00806c20@boo.net.suse.lists.linux.kernel>
[not found] ` <884740000.1043737132@titus.suse.lists.linux.kernel>
[not found] ` <20030128071313.GH780@holomorphy.com.suse.lists.linux.kernel>
[not found] ` <1466000000.1043770007@titus.suse.lists.linux.kernel>
2003-01-28 16:37 ` [PATCH] page coloring for 2.5.59 kernel, version 1 Andi Kleen
2003-01-28 16:37 ` Andi Kleen
2003-01-28 16:49 ` Martin J. Bligh [this message]
2003-01-28 16:49 ` Martin J. Bligh
2003-01-28 17:06 ` Bill Davidsen
2003-01-28 17:06 ` Bill Davidsen
2003-01-28 17:22 ` Valdis.Kletnieks
2003-01-28 18:01 jasonp
2003-01-28 18:01 ` jasonp
-- strict thread matches above, loose matches on Subject: below --
2003-01-28 17:49 jasonp
2003-01-28 17:49 ` jasonp
2003-01-28 3:47 Jason Papadopoulos
2003-01-28 3:47 ` Jason Papadopoulos
2003-01-28 3:57 ` William Lee Irwin III
2003-01-28 3:57 ` William Lee Irwin III
2003-01-28 4:11 ` William Lee Irwin III
2003-01-28 4:11 ` William Lee Irwin III
2003-01-28 6:58 ` Martin J. Bligh
2003-01-28 6:58 ` Martin J. Bligh
2003-01-28 7:13 ` William Lee Irwin III
2003-01-28 7:13 ` William Lee Irwin III
2003-01-28 16:06 ` Martin J. Bligh
2003-01-28 16:06 ` Martin J. Bligh
2003-01-28 16:41 ` Falk Hueffner
2003-01-28 16:41 ` Falk Hueffner
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