On 04/02/2015 17:09, ki...@yahoo.com wrote:
> Hi Bill,
Hi Greg,
>
> Has the patch been checked-in or will it be available only via the  patch ?
As it will not work on Mac at this stage I cannot check it in. For now I 
think the developers who build themselves should try it out for a while. 
Given that multi-threading is very hard to empirically test, there are 
bound to be a few outstanding problems to solve anyway.
>
> 73's
> Greg, KI7MT
73
Bill
G4WJS.
>
> On 2/4/2015 10:01 AM, Bill Somerville wrote:
>> Hi All,
>>
>> it looks like the latest jt9 using OpenMP and multi-threaded FFTs along
>> with Joe's recent re-factorings for performance seem to be approaching
>> stability. If anyone wants to try them out on air with WSJT-X, the
>> attached patch will allow WSJT-X to be built with them enabled.
>>
>> Note that the patch enables a fairly lengthy FFT plan optimization and
>> the first decode cycle may take a few minutes to complete, do not kill
>> the program as the accumulated FFT wisdom is written out at the end of a
>> session. Once the FFTW wisdom is saved there will be no further delays.
>>
>> Testing here results in decodes that are so fast that it hardly seems
>> worth looking fro any more performance improvements until we start
>> getting 100's concurrent of QSOs per band. Impressive stuff!
>>
>> Running on a quad-core Core i7 laptop here.
>>
>> 73
>> Bill
>> G4WJS.
>>
>>
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> ------------------------------------------------------------------------------
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> hub for all things parallel software development, from weekly thought
> leadership blogs to news, videos, case studies, tutorials and more. Take a
> look and join the conversation now. http://goparallel.sourceforge.net/
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Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
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