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Hi, Douglas

Thanks for your kind reply.

1 I run the same subject on a server with openmp 8 flags cost 7 hours, without openmp 8 flag would be 7h10minutes.

3 Could you be more specific about run them by hand? is this mean I run different tasks like skull strip or parcellation separately within recon rather than recon-all?

Best,

Wei

On Mon, Jan 25, 2021 at 10:17 PM Douglas N. Greve <dgreve@mgh.harvard.edu> wrote:

On 1/20/2021 3:39 PM, Wei Shao wrote:

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Hi, Freesufer experts

My name is wei shao, I have a few questions regarding the parallel computing of recon-all  

1 According to documents, freesurfer is OpenMP code , I use -openmp 8 flag like: recon-all -alli -i input.file  -s output.file -openmp 8 

to tun the recon command on a server, but it doesn't work for me (the running time is very similar for the same subject). Cloud you tell me what is wrong?

Please specify the difference in times.

2 Can Freesufer take advantage of several GPUs?

No

3 Is it possible to open few threads to run recon-all on different sections parallelly?

Only if you run them by hand

Best,

Wei

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