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Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.]
From: |
Tatsuro MATSUOKA |
Subject: |
Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.] |
Date: |
Mon, 20 Feb 2012 19:04:42 +0900 (JST) |
Hello
Please tell me which is correct to measure the performance.
1. n=2000; A=randn(n); B=randn(n);tic; C=A*B; t=toc, MFLOPS=2*n^3/t*1e-6
2. n=2000; A=randn(n); B=randn(n);ta=cputime; C=A*B; t=cputime-ta,
MFLOPS=2*n^3/t*1e-6
Case 1 gives two - four times faster than that of the case 2.
Example
octave:2> n=2000; A=randn(n); B=randn(n);tic; C=A*B; t=toc, MFLOPS=2*n^3/t*1e-6
t = 0.70904
MFLOPS = 2.2566e+004
octave:3> n=2000; A=randn(n); B=randn(n);ta=cputime; C=A*B; t=cputime-ta,
MFLOPS=2*n^3/t*1e-6
t = 1.4040
MFLOPS = 1.1396e+004
Which test is correct to check the performance.
Regards
Tatsuro
--- On Mon, 2012/2/20, Tatsuro MATSUOKA wrote:
> Hello
>
> I have been misled. OpenBLAS can be built msys+MinGW tool chain.
> However, I feel that fluctuation of simple performance test of larger than
> that built on cygwin. I will continue further test.
>
> Perhaps
>
> Regards
>
> Tatsuro
>
> --- On Mon, 2012/2/20, nitnit wrote:
>
> >
> > xianyi wrote
> > >
> > > Hi Nitzan,
> > >
> > > What's the version of OpenBLAS?
> > >
> > > I just released 0.1 alpha2.5 version including some patches for MingW
> > > 64-bit.
> > >
> > >
> > >
> >
> > Hi xianyi,
> >
> > It was 2.4-2. I have seen your latest 2.5 release and will try it later
> > today.
> >
> > Nitzan
> >
> > --
> > View this message in context:
> > http://octave.1599824.n4.nabble.com/Re-Octave-3-6-0-on-Windows-XP-plot-fails-tp4392652p4403360.html
> > Sent from the Octave - General mailing list archive at Nabble.com.
> > _______________________________________________
> > Help-octave mailing list
> > address@hidden
> > https://mailman.cae.wisc.edu/listinfo/help-octave
> >
> _______________________________________________
> Help-octave mailing list
> address@hidden
> https://mailman.cae.wisc.edu/listinfo/help-octave
>
- Re: Octave 3.6.0 on Windows XP plot fails., (continued)
- Re: Octave 3.6.0 on Windows XP plot fails., Philip Nienhuis, 2012/02/17
- Re: Octave 3.6.0 on Windows XP plot fails., Tatsuro MATSUOKA, 2012/02/17
- Re: Octave 3.6.0 on Windows XP plot fails., Philip Nienhuis, 2012/02/17
- Re: Octave 3.6.0 on Windows XP plot fails., Michael Goffioul, 2012/02/17
- Re: Octave 3.6.0 on Windows XP plot fails., nitnit, 2012/02/18
- MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.], Philip Nienhuis, 2012/02/19
- Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.], nitnit, 2012/02/19
- Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.], Xianyi Zhang, 2012/02/19
- Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.], nitnit, 2012/02/20
- Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.], Tatsuro MATSUOKA, 2012/02/20
- Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.],
Tatsuro MATSUOKA <=
- Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.], Xianyi Zhang, 2012/02/20
- Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.], Martin Helm, 2012/02/20
- Re: MinGW libblas [WAS: Re: Octave 3.6.0 on Windows XP plot fails.], Tatsuro MATSUOKA, 2012/02/20
- Re: Octave 3.6.0 on Windows XP plot fails., Tatsuro MATSUOKA, 2012/02/21
- Re: Octave 3.6.0 on Windows XP plot fails., nitnit, 2012/02/21
- Re: Octave 3.6.0 on Windows XP plot fails., PhilipNienhuis, 2012/02/23
- 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