Performance Issues on ccNuma-System

Christoph Statz christoph.statz at
Tue Oct 14 02:06:06 CDT 2008

>   The sparse matrix is MUCH to big for the cache so has to stream  
> through from memory,
> thus the huge number of "cache misses". This same performance issue  
> occurs on
> all modern systems.

Yes, of course. But on most modern systems i don't have the "problem"  
that the cache is held coherent which causes a bunch of extra cycles  
I don't have performance problems on our Clusters. It is just the  
"big" machine.


Christoph Statz

Institut für Nachrichtentechnik
Technische Universität Dresden
01062 Dresden

Email:  christoph.statz at
Phone: +49 351 463 32287

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