Re: To Melzzzzz

From	Ramine <ramine@1.1>
Newsgroups	comp.programming, comp.programming.threads
Subject	Re: To Melzzzzz
Date	2014-06-29 10:54 -0700
Organization	A noiseless patient Spider
Message-ID	<lop9ag$ai3$1@dont-email.me> (permalink)
References	<longtm$bkp$1@dont-email.me> <lonsia$ea2$1@solani.org> <lop8hu$59l$1@dont-email.me> <lop8rt$834$3@solani.org>

Cross-posted to 2 groups.

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Melzzzzz wrote:
 > I have this benchmark long ago and it seems to autovectorize onli LU
 > and that at -O3.


No i don't think so, i am using the newest version of tdm-gcc
and it is auto-vectorizing  the FFT and the MonteCarlo and Sparse 
MatMult and LU too.



Thank you,
Amine Moulay Ramdane.



On 6/29/2014 7:46 AM, Melzzzzz wrote:
> On Sun, 29 Jun 2014 10:41:30 -0700
> Ramine <ramine@1.1> wrote:
>
>> On 6/28/2014 7:10 PM, Melzzzzz wrote:
>>> On Sat, 28 Jun 2014 15:51:59 -0700
>>> Ramine <ramine@1.1> wrote:
>>>
>>>>
>>>> Hello,
>>>>
>>>> I have looked at your matrix multiplication using
>>>> SSE2 and AVX that you have posted on assembler.x86 forum,
>>>> i just wanted to tell you that you don't need to write
>>>> it in assembler, cause GCC do auto-vectorize the floating
>>>> point calculation and it auto-vectorize also the Matrix
>>>> multiplication even at -O1 optimization...
>>>
>>> as I see it it don't....
>>>
>>>
>>>    and GCC do
>>>> auto-vectorize beautifully since the GCC auto-vectorization
>>>> have  given a good results on scimark2 benchmark too.
>>>
>>> Care to share example?
>>
>>
>> You can download the following scimark2 and compile it with
>> the newest version of tdm-gcc with just -O1 level optimization
>> and -S to generate the assembler code and after that look at the
>> assembler code and you will see that it is auto-vectorizing the code:
>>
>> http://math.nist.gov/scimark2/
>
> I have this benchmark long ago and it seems to autovectorize onli LU
> and that at -O3.
> bmaxa@maxa:~/examples/forth/sci$ gcc-trunk -O2 *.c -o scimark2 -lm
> bmaxa@maxa:~/examples/forth/sci$ time ./scimark2
> **                                                              **
> ** SciMark2 Numeric Benchmark, see http://math.nist.gov/scimark **
> ** for details. (Results can be submitted to pozo@nist.gov)     **
> **                                                              **
> Using       2.00 seconds min time per kenel.
> Composite Score:         1739.60
> FFT             Mflops:  1782.75    (N=1024)
> SOR             Mflops:  1305.62    (100 x 100)
> MonteCarlo:     Mflops:   618.10
> Sparse matmult  Mflops:  2255.16    (N=1000, nz=5000)
> LU              Mflops:  2736.35    (M=100, N=100)
>
> real	0m33.408s
> user	0m33.331s
> sys	0m0.052s
> bmaxa@maxa:~/examples/forth/sci$ gcc-trunk -O3 *.c -o scimark2 -lm
> bmaxa@maxa:~/examples/forth/sci$ time ./scimark2
> **                                                              **
> ** SciMark2 Numeric Benchmark, see http://math.nist.gov/scimark **
> ** for details. (Results can be submitted to pozo@nist.gov)     **
> **                                                              **
> Using       2.00 seconds min time per kenel.
> Composite Score:         2102.19
> FFT             Mflops:  1855.88    (N=1024)
> SOR             Mflops:  1848.64    (100 x 100)
> MonteCarlo:     Mflops:   621.80
> Sparse matmult  Mflops:  2275.65    (N=1000, nz=5000)
> LU              Mflops:  3908.98    (M=100, N=100)
>
> real	0m28.933s
> user	0m28.849s
> sys	0m0.050s
>
>
>>
>>
>> Thank you,
>> Amine Moulay Ramdane.
>>
>>
>>>
>>>>
>>>>
>>>> Thank you,
>>>> Amine Moulay Ramdane.
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>
>
>

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To Melzzzzz Ramine <ramine@1.1> - 2014-06-28 15:51 -0700
  Re: To Melzzzzz Melzzzzz <mel@zzzzz.invalid> - 2014-06-29 04:10 +0200
    Re: To Melzzzzz Ramine <ramine@1.1> - 2014-06-29 10:33 -0700
      Re: To Melzzzzz Melzzzzz <mel@zzzzz.com> - 2014-06-29 16:39 +0200
        Re: To Melzzzzz Ramine <ramine@1.1> - 2014-06-29 10:47 -0700
          Re: To Melzzzzz Melzzzzz <mel@zzzzz.com> - 2014-06-29 17:00 +0200
            Re: To Melzzzzz Ramine <ramine@1.1> - 2014-06-29 11:14 -0700
              Re: To Melzzzzz Melzzzzz <mel@zzzzz.com> - 2014-06-29 17:20 +0200
              Re: To Melzzzzz Ramine <ramine@1.1> - 2014-06-29 11:23 -0700
                Re: To Melzzzzz Melzzzzz <mel@zzzzz.com> - 2014-06-29 17:31 +0200
                Re: To Melzzzzz Ramine <ramine@1.1> - 2014-06-29 11:32 -0700
                Re: To Melzzzzz Ramine <ramine@1.1> - 2014-06-29 11:38 -0700
    Re: To Melzzzzz Ramine <ramine@1.1> - 2014-06-29 10:41 -0700
      Re: To Melzzzzz Melzzzzz <mel@zzzzz.invalid> - 2014-06-29 16:46 +0200
        Re: To Melzzzzz Ramine <ramine@1.1> - 2014-06-29 10:54 -0700

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