-parallel -openmp 4
should run things with 4 processors and parallelize across hemi where it can
The run time on that page is probably not accurate. But is it faster when you use those options?

On 7/16/2020 11:47 PM, Billah, Tashrif wrote:

This says "-openmp <num> after -parallel", this says "export ITK_GLOBAL_DEFAULT_NUMBER_OF_THREADS=2", while this says "--threads nthreads" for parallel processing. I want to run recon-all and want all processes under recon-all to be parallelized. Which one(s) of the above flags should I provide with recon-all? Please note that the values are not my interest, the flags are. I know the proper values I should choose for the flags on my machines.

So far I have been trying "-parallel -openmp 4" option only but my run time stays over 5 hours contrary to less than 3 hours stipulated in the documentation.

-Tashrif

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