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13 Commits

Author SHA1 Message Date
Bill Somerville 30e11106c8
Further refinements to complex to real FFT initialization 2021-10-20 19:28:58 +01:00
Bill Somerville 595ef8e9db
Repair a long-standing defect that could cause access violations 
This was revealed when building with gcc-fortran v11 and using
reference spectrum correction.
 2021-10-20 18:00:32 +01:00
Bill Somerville 332ecfebf8
Leave global FFTW3 clean up to main programs 2021-01-26 21:35:13 +00:00
Joe Taylor 41c22b0153 Call fftwf_cleanup() from four2a to free all remaining fftw memory. 2019-02-15 09:38:28 -05:00
Bill Somerville 91b909b581 Thread safety enhancements to jt9 
Serialize thread unsafe FFTW3 calls

Serialize FFTW3 plan initializations in four2a

Serialize decoder results output to file/console

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4928 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2015-02-04 01:41:26 +00:00
Joe Taylor 3a8232b113 Made a start at implementing an option to use multi-threaded FFTs. 
New command-line option for jt9: [-m nthreads].  Default is nthreads=1.
Also refactored a loop in filbig.f90 that was taking far too much
time.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4916 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2015-01-30 21:28:10 +00:00
Joe Taylor c628013582 A few more tweaks, and add the file nfft.dat of efficient FFT lengths. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4837 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2014-12-18 20:53:16 +00:00
Joe Taylor 22e15084e1 Add chkfft.f90; more thorough comments in four2a.f90. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4835 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2014-12-18 16:41:18 +00:00
Joe Taylor 3a5edb5af5 FFTW wisdom is now built into jt9[.exe]. 
New optional argument to jt9: -w patience
Default is patience = 1

Example timing measurements for 130610_2343.wav:

patience  plan   execute
          (s)      (s)
-----------------------------------------------
   0      0.01     1.25  FFTW_ESTIMATE
   1      0.69     1.25  FFTW_ESTIMATE_PATIENT
   2     16.97     1.15  FFTW_MEASURE
   3    390.88     1.15  FFTW_PATIENT

Conclusions, consistent with expectation based on past experience
with similar FFTs:
  - First decode (in each mode) with patience = 2 is slow.
  - Speed advantage of patience = 2 is small but measurable.
  - No measurable advantage in using patience > 2.

Present mainwindow.cpp has "-w 1" hard-wired.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4610 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2014-11-20 18:48:53 +00:00
Joe Taylor f07a960e2d Several decoder optimizations, including implementation of FFTW wisdom. 
Notes:
1. Equivalents of wisdom1.bat will be needed for *nix and OS X.  (The
   version now added to the source .../lib directory is an example only.)
2. Installers should offer to run the wisdom1[.bat] script at installation
   time.
3. wisdom1[.bat] and fftwf-wisdom[.exe] must be installed in .../bin directory 



git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4607 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2014-11-19 17:23:57 +00:00
Joe Taylor bfcbce34a7 Convert all *.f files to *.f90. 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3296 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2013-05-22 15:39:28 +00:00
Joe Taylor b226f532d4 1. Dashed line between decoding periods. 
2. Tweak four2a for compilation on 64-bit systems.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3287 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2013-05-21 11:43:01 +00:00
Joe Taylor 7369062c4a Rename library directory 
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2635 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
 2012-10-03 14:31:43 +00:00