Hi Mike,
The change was to replace "slope", a currently undefined, vestigial
remnant of some old code, to "nflatten" -- the correct argument to pass
to symspec. The variable "slope" was undefined in jt9.f90. Inside
symspec, its value supposedly controlled whether the spectrum being
computed for the waterfall would be flattened, or not. Since the
variable was undefined, it might sometimes be zero, sometimes nonzero.
Not a good situation if we're trying to make comparative timing tests.
Perhaps you will like it better to set nflatten=0 in jt9.f90. That will
make jt9 or jt9_omp run faster from the command line, especially since
"flat3" is kinda slow. But if you normally check the "Flatten" box in
the GUI, your decoding results may not be exactly the same.
In normal operation the timing difference is moot, because the extra
work takes place during the Rx minute rather than at its end. It's for
the CPU-bound stuff at the end of the Rx minute that I have been
speeding things up.
Perhaps I should look at "flat3", to see why it's so slow -- even though
its slow behavior has essentially no effect noticeable to an operator.
-- Joe
On 2/4/2015 3:45 PM, Michael Black wrote:
> The change on jt9.for replacing nflatten with slope really made processing
> times much worse.
>
> Mainwindow.cpp is using nflatten.so I don't quite understand the log comment
> about making them consistent.
>
>
>
> On my testing jt9_omp went from 1.12 to 1.81 seconds.
>
>
>
> Mike W9MDB
>
>
>
>
>
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