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Re: [Discuss-gnuradio] Using volk in Mac: test report

From: Nowlan, Sean
Subject: Re: [Discuss-gnuradio] Using volk in Mac: test report
Date: Fri, 17 Feb 2012 22:11:19 +0000

I built Tom’s safe_align branch on E100 and ran volk_profile. It segfaulted on “RUN_VOLK_TESTS:volk_32fc_s32fc_multiply_32fc_a. I’ll get a stack trace for you.




From: discuss-gnuradio-bounces+address@hidden [mailto:discuss-gnuradio-bounces+address@hidden On Behalf Of Tom Rondeau
Sent: Friday, February 17, 2012 2:33 PM
To: Nick Foster
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] Using volk in Mac: test report


On Fri, Feb 17, 2012 at 2:30 PM, Nick Foster <address@hidden> wrote:

On Fri, Feb 17, 2012 at 11:20 AM, Carles Fernandez <address@hidden> wrote:

Thanks for the inputs!

We are interested in determining the best architecture at instantation
time. What would be the best strategy? We though about running the
same operations several times for each architecture, measure the
results and use the fastest one for the processing blocks. Would this
be the right approach?




Run volk_profile. It does exactly what you said, and writes the results to ~/.volk/volk_config. Volk reads this file when it is involked (sorry) to determine which particular function to execute. So all you do is run volk_profile once on any given machine, and it's optimized.





This is discussed on the webpage:


We'll be updating this as things progress with Volk, but the profiler info is there already.




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