It depends on the Stream Multiprocessor (SM) constrains --------------------------------------------------------------------- Pedro Paulo de Magalhães Oliveira Junior Diretor de Operações Netfilter & SpeedComm Telecom -- www.netfilter.com.br -- For mobile: http://www.netfilter.com.br/mobile
On Tue, Nov 23, 2010 at 12:25, Richard G. Edgar <[email protected]>wrote: > > On Tue, 2010-11-23 at 15:03 +0100, Marcus N Schmidt wrote: > > I should note that we have a single GeForce GTX 470 card on the > > workstation and have installed the latest CUDA drivers and toolkit > > (3.2). > > > > > > > > Is there a limit to how many processes can use CUDA at the same > > > time? I just setup a new Linux workstation and am delving into > > > FreeSurfer w/ CUDA. I'm getting the following error: > > > > > > > > > Acquiring CUDA device > > > Using default device > > > CUDA Error in file 'devicemanagement.cu' on line 46 : all > > > CUDA-capable devices are busy or unavailable. > > > Linux rietveld 2.6.18-194.26.1.el5 #1 SMP Tue Nov 9 12:54:20 EST > > > 2010 x86_64 x86_64 x86_64 GNU/Linux > > None of the code I've written (which includes devicemanagement.cu) > imposes limitations - I actually often run more than one GPU job at once > on the card. The driver software timeslices the entire card between > processes. However, the cards themselves might be set so that only one > process can use them at a time (using the nvidia-smi tool) - that's > entirely up to the system administrator. > > I would not recommend running more than one CUDA process per card > routinely - especially not on a low end card like that - since the > memory allocations might end up failing, killing the job. > > Regards, > > Richard > > > _______________________________________________ > Freesurfer mailing list > [email protected] > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > The information in this e-mail is intended only for the person to whom it > is > addressed. If you believe this e-mail was sent to you in error and the > e-mail > contains patient information, please contact the Partners Compliance > HelpLine at > http://www.partners.org/complianceline . If the e-mail was sent to you in > error > but does not contain patient information, please contact the sender and > properly > dispose of the e-mail. > >
_______________________________________________ Freesurfer mailing list [email protected] https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
