From: Andrea Arcangeli <andrea@suse.de>
To: Ingo Molnar <mingo@elte.hu>
Cc: Eric Whiting <ewhiting@amis.com>,
akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: -mmX 4G patches feedback [numbers: how much performance impact]
Date: Wed, 7 Apr 2004 08:03:30 +0200 [thread overview]
Message-ID: <20040407060330.GB26888@dualathlon.random> (raw)
In-Reply-To: <20040406202548.GI2234@dualathlon.random>
On Tue, Apr 06, 2004 at 10:25:48PM +0200, Andrea Arcangeli wrote:
> I'm using DOUBLE. However I won't post the quips, I draw the graph
> showing the performance for every working set, that gives a better
> picture of what is going on w.r.t. memory bandwidth/caches/tlb.
Here we go:
http://www.kernel.org/pub/linux/kernel/people/andrea/misc/31-44-100-1000/31-44-100-1000.html
the global quips you posted indeed had no way to account for the part of
the curve where 4:4 badly hurts. details in the above url.
Please cross check my results on your hardware (I used a 2.5Ghz xeon, 1G
of ram, and benchs run fresh after boot with all ram still free).
Numbers are perfectly reproducible for me, and they make perfect sense
too. 2.6.5-aa4 is the same as 2.6.5-aa3 for this benchmark (though I'll
upload 2.6.5-aa4 in a few hours).
next prev parent reply other threads:[~2004-04-07 6:03 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-05 16:36 -mmX 4G patches feedback Eric Whiting
2004-04-05 17:46 ` Andrea Arcangeli
2004-04-05 21:35 ` Eric Whiting
2004-04-05 22:16 ` Andrea Arcangeli
2004-04-06 11:55 ` -mmX 4G patches feedback [numbers: how much performance impact] Ingo Molnar
2004-04-06 14:49 ` Eric Whiting
2004-04-06 15:59 ` Andrea Arcangeli
2004-04-06 16:13 ` Arjan van de Ven
2004-04-06 16:39 ` Andrea Arcangeli
2004-04-06 17:24 ` Ingo Molnar
2004-04-06 17:57 ` Andrea Arcangeli
2004-04-07 22:54 ` Martin J. Bligh
2004-04-07 22:50 ` Andrea Arcangeli
2004-04-06 19:25 ` Ingo Molnar
2004-04-06 20:25 ` Andrea Arcangeli
2004-04-07 6:03 ` Andrea Arcangeli [this message]
2004-04-07 6:46 ` Ingo Molnar
2004-04-07 7:23 ` Andrea Arcangeli
2004-04-07 8:23 ` Ingo Molnar
2004-04-07 21:35 ` Andrea Arcangeli
2004-04-07 17:27 ` Andrea Arcangeli
2004-04-07 7:25 ` Ingo Molnar
2004-04-07 21:39 ` Andrea Arcangeli
2004-04-07 22:58 ` Martin J. Bligh
2004-04-07 23:01 ` Andrea Arcangeli
2004-04-07 23:21 ` Martin J. Bligh
2004-04-07 23:18 ` Andrea Arcangeli
2004-04-07 23:34 ` Martin J. Bligh
2004-04-08 0:18 ` Andrea Arcangeli
2004-04-08 6:24 ` Martin J. Bligh
2004-04-08 21:59 ` Andrea Arcangeli
2004-04-08 22:19 ` Martin J. Bligh
2004-04-08 22:19 ` Andrea Arcangeli
2004-04-08 23:14 ` Martin J. Bligh
2004-04-08 23:22 ` Andrea Arcangeli
2004-04-08 23:42 ` Martin J. Bligh
2004-04-08 23:49 ` Andrea Arcangeli
2004-04-07 21:19 ` -mmX 4G patches feedback Martin J. Bligh
2004-04-07 21:49 ` Andrea Arcangeli
-- strict thread matches above, loose matches on Subject: below --
2004-04-06 17:59 -mmX 4G patches feedback [numbers: how much performance impact] Manfred Spraul
2004-04-06 18:41 ` Andrea Arcangeli
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