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Re: Octave 3.6.0 on Windows XP plot fails.
From: |
Martin Helm |
Subject: |
Re: Octave 3.6.0 on Windows XP plot fails. |
Date: |
Wed, 29 Feb 2012 15:28:32 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.2) Gecko/20120215 Thunderbird/10.0.2 |
Am 29.02.2012 14:45, schrieb Xianyi Zhang:
> Hi,
>
> The matrix multiplication cannot obtain the performance from
> hyperthreading.
>
> Thanks
>
> Xianyi
>
Why not? Is this a limitation of the mingw compiler, the windows
environment or the BLAS library in question?
This is what I get on linux
Slow reference BLAS
address@hidden:~> octave -qf --eval "a=rand(2000);tic;a*a;toc"
Elapsed time is 6.58622 seconds.
Single threaded ATLAS
address@hidden:~> LD_PRELOAD=/usr/lib64/atlas/libsatlas.so.3 octave -qf
--eval "a=rand(2000);tic;a*a;toc"
Elapsed time is 1.26832 seconds.
Multithreaded ATLAS
address@hidden:~> LD_PRELOAD=/usr/lib64/atlas/libtatlas.so.3 octave -qf
--eval "a=rand(2000);tic;a*a;toc"
Elapsed time is 0.422859 seconds.
You see the multi threaded version is about 3 times faster than the
single threaded on my quad core.
- Re: Octave 3.6.0 on Windows XP plot fails., (continued)
- Re: Octave 3.6.0 on Windows XP plot fails., Xianyi Zhang, 2012/02/25
- Re: Octave 3.6.0 on Windows XP plot fails., nitnit, 2012/02/25
- Re: Octave 3.6.0 on Windows XP plot fails., Xianyi Zhang, 2012/02/26
- Re: Octave 3.6.0 on Windows XP plot fails., maiky76, 2012/02/26
- Re: Octave 3.6.0 on Windows XP plot fails., Xianyi Zhang, 2012/02/27
- Re: Octave 3.6.0 on Windows XP plot fails., nitnit, 2012/02/27
- Re: Octave 3.6.0 on Windows XP plot fails., maiky76, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., nitnit, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., maiky76, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., Xianyi Zhang, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails.,
Martin Helm <=
- Re: Octave 3.6.0 on Windows XP plot fails., Michael Goffioul, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., Martin Helm, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., Michael Goffioul, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., Martin Helm, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., Michael Goffioul, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., Martin Helm, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., Martin Helm, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., José Luis García Pallero, 2012/02/29
- Re: Octave 3.6.0 on Windows XP plot fails., Przemek Klosowski, 2012/02/29
Re: Octave 3.6.0 on Windows XP plot fails., Tatsuro MATSUOKA, 2012/02/15