1) I did a quick benchmark on a system with 16 3.2 GHz core-I7's and 4
gtx1080's using 1000 super-res K2 movies.
4 mpi's with 1 gpu each is faster (2.6 hours) than 1 mpi with 4 gpus
(3.5 hours) on this system.
2) Ialso found the reason I originally concluded this didn't work. As
Alpay pointed out, if running from the gui you must manually assign
gpu's using ":" notation. I'd mistakenly assumed that if you simply
specified 4 mpi's and let Relion automatically choose gpu's, it would
default to sequential assignment as it does with 2D and 3D
classification. That doesn't seem to work in this case.
Regards,
-jh-
On 12/15/18 8:57 PM, Daniel Asarnow wrote:
>
> Is assigning all 4 GPUs to one MotionCor2 faster than
> running 4 instances of MotionCor2?
>
>
> It's supposed to be, and that's how we use it at UCSF for on-the-fly
> correction. I'll double check our benchmarks.
>
> Best,
> -da
>
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--
John M. Heumann
Department of Molecular, Cellular, and Developmental Biology
347 UCB, University of Colorado
Boulder, CO 80309-0347
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