2 x quad-core system is slower that 2 x dual core on FreeBSD

Bob Bishop rb at gid.co.uk
Tue Nov 20 13:09:59 PST 2007


FWIW, we are seeing 2 x quad-core 2.66GHz outperform (per core) 2 x  
dual-core 3GHz on the same type of m/b, apparently because of better  
bandwidth to memory. However, this is on a compute-intensive workload  
running 1 job per core so would be pretty insensitive to scheduler/ 
locking issues.

Bob Bishop          +44 (0)118 940 1243
rb at gid.co.uk fax +44 (0)118 940 1295

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