Comments (2)
Are you running it within QGIS? AFAIK, not all module options seem to be enabled there.
Note that the native GRASS GIS r.sun command has the nprocs options that allows to set a number of parallel processes and the npartitions option to split the data in chunks.
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Yes, CPU parallelization based on openMP has been available for some time in r.sun
.
However, in the QGIS wrapper script r.sun.insoltime.txt
the parameter "nproc" is yet missing. It would be sufficient to (locally) add this line, so in your local installation you could simply add it:
*QgsProcessingParameterNumber|nprocs|Number of threads which will be used for parallel computing|QgsProcessingParameterNumber.Integer|1|True|1|None
(I have tested this change successfully on my local Fedora box).
The sustainable solution would be to add this parameter in QGIS via a pull request, editing the file:
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