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Re: [Discuss-gnuradio] How to set up MP-Benchmark Test PowerPC Processor
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From: |
Eric Blossom |
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Subject: |
Re: [Discuss-gnuradio] How to set up MP-Benchmark Test PowerPC Processors (using Altivec) |
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Date: |
Thu, 6 May 2010 20:01:13 -0700 |
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User-agent: |
Mutt/1.5.20 (2009-08-17) |
On Wed, May 05, 2010 at 06:50:36PM +0200, matty wrote:
> Is it generally possible to use qa_fft.py or the CGRAN gcellized FFT as
> offloaded portion,
> because i want to analyse the benefits of the SPEs on some GNU Radio code.
> Therefore a benchmark result like this (
> http://gnuradio.org/redmine/attachments/104/R-10231-ps3-20090115-0226.png)
> would be convincing, because you can see the linear dependence between
> speedup and # of spe's.
>
> Best Regards
> Matty
The cgran version shows the speedup pretty well, but you need to be
using big FFTs to see the win, where big >= 4096 points.
Eric