Hi Freesurfers, What Operating System are you using?
I'm using CentOS 5.5 but with CUDA 3.2 and I have some problems with the nvidia.ko kernel module. Every time that I reboot the computer I have to make a modprobe and test with some CUDA SDK example... Other problems appear when I run multiple recon-all, often the processes crash with a kernel panic or simply with an abort. I don't know if the OS is interfering in the execution... Any idea will be apreciated... Thank you! 2011/4/5 Ian Malone <ian.mal...@drc.ion.ucl.ac.uk> > On 05/04/11 16:55, Richard G. Edgar wrote: > > > > On Tue, 2011-04-05 at 16:30 +0100, Ian Malone wrote: > >> Richard G. Edgar wrote: > > >>> On the standard test case we use here, a full recon-all run takes 8 > >>> hours on a 3.2 GHz Nehalem core, and about 4 hours 20 mins when using > >>> the Tesla C2050. > >>> > >>> > >> > >> Would I be right in concluding that a 4-core Nehalem (e.g. i7) has > >> more throughput than the C2050 then? > > > > Yes, but less than having 3 CPU jobs, and one GPU one. I did test once, > > and there isn't much penalty to running one recon-all job per core on a > > Nehalem system. > > > > Right now, the CPU still does most of the work in the recon-all stream - > > it's something of a game of Amdahl's Law Wac-A-Mole. You could always > > try starting 4 GPU jobs at once.... I've not done the testing, but a > > C2050 would probably have enough RAM, and in any given recon-all run, > > the GPU does spend a lot of time idle. Hence, it would end up being > > divvied up between the four jobs. > > > > Thanks, that's interesting to know. > > -- > imalone > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > 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. > > -- Jordi Delgado Mengual PIC (Port d'Informació Científica) Campus UAB, Edifici D E-08193 Bellaterra, Barcelona Tel: +34 93 586 82 32 Fax: +34 93 581 41 10 http://www.pic.es Avis - Aviso - Legal Notice: http://www.ifae.es/legal.html
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