On Tue, Feb 12, 2013 at 7:09 PM, Karl Rupp <rupp at mcs.anl.gov> wrote:
> Which crossover are you referring to? The CPU versus GTX285 at about 20k >> dofs, but with only very small gains for another order of magnitude? >> > > I assume it's the cross-over of Xeon Phi vs. Xeon, MIC is slower than Xeon by more than an order of magnitude at 10k dofs. > but almost all cross-overs happen in the 10k-100k region and are due to > PCI-Express latency. Why is PCI-Express latency important here? Can't the MIC code run entirely on the device? > Scaling this to large clusters, replace Xeon Phi by compute node, > PCI-Express by GB-Ethernet/Infiniband as well as change the timescale a bit > and you're probably not too far off... > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20130212/3e8570a6/attachment.html>
