Also note: something's wrong when trying to decode a file read
by the GUI from disk. Will fix it soon...
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The long FFTs can now use the multi-threaded FFTW routines.
Subroutine decode9.f90 was renamed jt9fano.f90.
The JT9 decoder's top-level functions were removed from decoder.f90
and put into a separate subroutine decjt90.f90.
Subroutine decoder.f90 is now configured for possible use of OpenMP
SECTIONS, with the JT9 and JT65 decoders running concurrently on
a multi-core machine. Note, however, that this concurrent processing
is not yet fully implemented. Probably calls to timer need to be removed;
some variables used in calls to jt65a and decjt9 may need to be
declared PRIVATE in decoder; some sections probably need to be declared
CRITICAL; probably some SAVE statements in downstream routines have
made them not thread-safe; etc., etc.
I'm a neophyte at using OpenMP. Comments, suggestions, and/or tests by
others will be welcome!
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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.
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Pass the temporary directory to jt9 and use it to give the correct
paths to temporary files. Also jt9 passes the absolute path to
kvasd.dat in the temporary directory to kvasd.
Clear out all the annoying cruft that has accumulated due to having to
run with $CWD as the temporary directory.
Use QStandardPaths to find the writable data directory where needed
rather than passing it around between objects. This now works because
the $CWD hasn't been changed.
Do away with the CMake option WSJT_STANDARD_FILE_LOCATIONS as it is no
longer needed.
Fix astro status file azel.dat formatting.
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Also complete the wrapper code in wisdom.c.
TBD: should be possible to use fftw3f.f03 instead of the ad hoc wisdom.c.
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This means that the first decode from a saved data file will be slow,
but the saved wisdom for the decoded mode(s) will be better than
for the default npatience = 1. All subsequent decodes in the same
mode(s) will take advantage of the newly saved wisdom.
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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.
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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
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Both decoders now have slightly better performance and faster
execution. The rare "duplicate decodes" in JT9 were eliminated.
On Windows, at least, calls to f90 routine system_clock() do not
provide correct wall time increments. Changed to using secnds()
instead.
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The lib/Makefile.MinGW makefile has been enhanced to link to the DLL
version of fftw3 which is the normal version of the library that you
get with the Windows installer.
The library is located by passing the FFTW3_DIR variable on the make
command line. For example on my system:
$ # In a MinGW console
$ cd ~/src/wsjtx/lib
$ make QT_DIR=/c/Tools/Qt/5.2.1/mingw48_32 \
> FFTW3_DIR=/c/Tools/fftw-3.3.3-dll32-2
Similarly with the qmake project:
$ # In a Qt MinGW 32-bit console
$ cd ~/src/wsjtx
$ qmake \
> HAMLIB_DIR=c:/test-install/hamlib/mingw48_32 \
> FFTW3_DIR=c:/Tools/fftw-3.3.3-dll32-2
$ mingw32-make
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Routine packmsg now tries the shortlist (Type 1 prefix or suffix) first.
Then it tries to to make a valid message using a Type 2 prefix or suffix.
If both fail, it packs the first 13 characters as a free-text message.
The GUI now generates the most useful messages with compound callsigns
of all valid types.
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SYSTEM_CLOCK() did not work as well, in the Windows Release build.
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Before the subsequent decodes on a period (nagain/=0) were truncating
the file and confusing JTAlert.
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