From: Willy TARREAU <willy@w.ods.org>
To: Dieter N?tzel <Dieter.Nuetzel@hamburg.de>
Cc: Linux Kernel List <linux-kernel@vger.kernel.org>,
Manfred Spraul <manfred@colorfullife.com>,
Robert Love <rml@tech9.net>
Subject: Re: [CFT] faster athlon/duron memory copy implementation
Date: Thu, 24 Oct 2002 23:16:08 +0200 [thread overview]
Message-ID: <20021024211608.GB486@pcw.home.local> (raw)
In-Reply-To: <200210242251.26776.Dieter.Nuetzel@hamburg.de>
On Thu, Oct 24, 2002 at 10:51:26PM +0200, Dieter N?tzel wrote:
> copy_page by 'even_faster' took 5616 cycles (1112.9 MB/s)
something bothers me here : with PC2100 RAM, you copy 1113 MB/s, that
is 1113 MB in + 1113 MB out !
I tried your code and code somewhat same results (dual xp1800+, pc2100, 760MPX).
but I pasted the no_prefetch_copy_page() function into it and now it says that I
copy 1455 MB/s ! I didn't look deep through the code, but I suspect that there's
some static work that is not accounted, or a subtract between two counters, or
something like that.
Cheers,
Willy
next prev parent reply other threads:[~2002-10-24 21:10 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-24 20:51 [CFT] faster athlon/duron memory copy implementation Dieter Nützel
2002-10-24 21:01 ` Dieter Nützel
2002-10-24 21:16 ` Willy TARREAU [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-10-25 16:29 Jorge Bernal "Koke"
2002-10-24 22:01 Harm Verhagen
2002-10-24 18:27 Shawn Starr
2002-10-24 17:15 Manfred Spraul
2002-10-24 17:37 ` Robert Love
2002-10-24 18:05 ` Zach Brown
2002-10-24 17:41 ` Andreas Steinmetz
2002-10-24 17:48 ` Matthias Welk
2002-10-24 19:01 ` erich
2002-10-24 19:11 ` Arjan van de Ven
2002-10-24 19:38 ` Manfred Spraul
2002-10-25 0:59 ` Panagiotis Papadakos
2002-10-24 17:53 ` Roger Luethi
2002-10-24 18:10 ` Daniel Egger
2002-10-24 19:15 ` Florin Iucha
2002-10-24 19:28 ` Manfred Spraul
2002-10-24 19:38 ` Dave Jones
2002-10-24 19:43 ` Ken Witherow
2002-10-25 13:08 ` Daniel Egger
2002-10-24 18:17 ` Eric Lammerts
2002-10-24 18:26 ` David Rees
2002-10-24 18:35 ` Josh McKinney
2002-10-24 18:36 ` Dave Jones
2002-10-24 18:43 ` Simon Fowler
2002-10-24 18:50 ` Simon Fowler
2002-10-24 18:56 ` Dave Jones
2002-10-24 18:48 ` Ernst Herzberg
2002-10-24 20:09 ` Ed Sweetman
2002-10-24 20:13 ` Robert Love
2002-10-24 20:31 ` Ed Sweetman
2002-10-24 20:49 ` Dave Jones
2002-10-24 20:26 ` Dave Jones
2002-10-25 9:19 ` Måns Rullgård
2002-10-24 19:11 ` Marcus Libäck
2002-10-24 19:19 ` Brian Gerst
2002-10-24 19:31 ` Matthias Schniedermeyer
2002-10-24 19:33 ` Pascal Schmidt
2002-10-24 19:39 ` Olaf Dietsche
2002-10-24 20:27 ` Mike Civil
2002-10-24 20:44 ` Willy TARREAU
2002-10-24 21:46 ` Josh Fryman
2002-10-24 22:18 ` Tim Schmielau
2002-10-24 23:09 ` Hirokazu Takahashi
2002-10-24 23:37 ` Ryan Cumming
2002-10-25 0:10 ` Matthias Andree
2002-10-25 8:35 ` venom
2002-10-25 13:31 ` Denis Vlasenko
2002-10-26 12:11 ` Jurjen Oskam
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