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Re: [Discuss-gnuradio] 3DNow fir test failing under debian with latest u
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From: |
Stephane Fillod |
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Subject: |
Re: [Discuss-gnuradio] 3DNow fir test failing under debian with latest unstable updates |
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Date: |
Tue, 30 Aug 2005 22:31:48 +0200 |
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User-agent: |
Mutt/1.5.8i |
On Mon, Aug 22, 2005 at 12:44:58AM -0400, Krzysztof Kamieniecki wrote:
[..]
> model name : AMD Athlon(tm) 64 Processor 3700+
> stepping : 10
> cpu MHz : 797.986
Krzysztof, I haven't seen your reply about the cpu speed.
Is the cpu MHz output right? 800MHz? Or is it automatic PowerNow?
What is the max cpu speed?
> ***gnuradio-core/src/test/benchmakr_dotprod output:
> generic: taps: 256 input: 4e+07 cpu: 11.330 taps/sec: 9.038e+08
> 3DNow!: taps: 256 input: 4e+07 cpu: 5.095 taps/sec: 2.01e+09
> SSE: taps: 256 input: 4e+07 cpu: 4.506 taps/sec: 2.272e+09
Have you tried out the latest CVS code with 64bit x86-64 speedup?
I'm curious what's the difference between 32bit and 64bit speedups.
Note: gcc-4.x still does a good job at optimizing the generic loop.
--
Stéphane - F8CFE