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c.f. bug 424647
List Archive: gentoo-amd64
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To: gentoo-amd64@g.o
From: Brian Litzinger <brian@...>
Subject: Re: x86_64 optimization patches for glibc.
Date: Sat, 23 Jul 2005 11:44:42 -0700
> On Sat, 2005-07-23 at 16:48 +0200, Simon Strandman wrote:
> > With the glibc 2.3.5 currently in gentoo I get:
> > isidor ~ # ./memcpy 2200 1000 1048576
> > Memory to memory copy rate = 1291.600098 MBytes / sec. Block size = 1048576.
> > 
> > But with glibc 2.3.5 + amd64 optimized strings I get:
> > isidor ~ # ./memcpy 2200 1000 1048576
> > Memory to memory copy rate = 2389.321777 MBytes / sec. Block size = 1048576.
> > 
> > That's an improvement of over 1000mb/s! Suse 9.3 also gives about 
> > 2300mb/s out of the box.

pre:
./memcpy 2000 1000 1048576
Memory to memory copy rate = 1302.701782 MBytes / sec. Block size = 1048576.

post:
./memcpy 2000 1000 1048576
Memory to memory copy rate = 2051.979980 MBytes / sec. Block size = 1048576.

AMD64 3200+ 2.0GHz
1024MB PC2700
Compaq R3240US
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gentoo-amd64@g.o mailing list


Replies:
Re: x86_64 optimization patches for glibc.
-- Luke-Jr
References:
x86_64 optimization patches for glibc.
-- Simon Strandman
Re: x86_64 optimization patches for glibc.
-- Allan Wang
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Updated Jun 17, 2009

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