Not sure we want more than 1 thread....my testing shows this on my 8-core box
since this patch would give me 6 threads.
I think the old improvement >1 thread showed was overtaken by multi-threading
the top level.
Thread 1 2 3 4 5 6
4930 1.10 1.27 1.24 1.23 1.29 1.31
1.10 1.21 1.25 1.25 1.27 1.31
1.09 1.25 1.23 1.22 1.29 1.32
1.09 1.22 1.24 1.22 1.27 1.29
1.11 1.23 1.22 1.23 1.27 1.33
1.12 1.23 1.25 1.27 1.29 1.31
1.08 1.22 1.24 1.23 1.26 1.30
1.10 1.25 1.23 1.25 1.31 1.30
1.14 1.23 1.24 1.26 1.27 1.32
1.13 1.22 1.22 1.23 1.28 1.29
1.11 1.23 1.25 1.25 1.27 1.32
1.12 1.23 1.23 1.24 1.27 1.29
1.12 1.25 1.24 1.23 1.27 1.29
1.08 1.24 1.25 1.24 1.28 1.34
1.08 1.23 1.23 1.21 1.30 1.29
1.08 1.27 1.24 1.25 1.28 1.27
1.15 1.25 1.25 1.29 1.28 1.30
1.13 1.26 1.22 1.27 1.27 1.30
1.10 1.25 1.23 1.24 1.27 1.30
Avg 1.09 1.25 1.24 1.24 1.28 1.30
-----Original Message-----
From: Bill Somerville [mailto:g4...@classdesign.com]
Sent: Wednesday, February 04, 2015 11:02 AM
To: WSJT software development
Subject: [wsjt-devel] WSJT-X: Using the latest decoder improvements in WSJT-X
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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