[petsc-users] RE : RE : How to get bandwidth peak out of PETSc log ?

Karl Rupp rupp at mcs.anl.gov
Fri Jun 21 08:13:01 CDT 2013


Hi Franck,

 > It seems performance are always the same whatever the number of threads.

As Jed already noted, this is pretty common on such machines.
Also, the recent Sandy Bridge CPUs from Intel can pretty much saturate 
the memory link with a single process/thread already, while former 
architectures often needed a second thread. Thus, if you have a Core 
i{3,5,7}-{2,3}xyz-CPU from Intel in your laptop, that's exactly what you 
observe.

Best regards,
Karli



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