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5 to 30% Speed Improvement

5 to 30% Speed Improvement

Posted May 26, 2005 13:34 UTC (Thu) by MarkWilliamson (subscriber, #30166)
In reply to: 5 to 30% Speed Improvement by ksmathers
Parent article: Is hyperthreading dangerous?

HT doesn't provide extra functional units but it may enable better use of
the functional units available, as well as allowing the CPU to continue
working in the event one thread stalls.

Unfortunately, with cache contention (and the different mix of functional
units required by different threads), the performance benefits can be
highly variable - scheduling-wise it's a whole new can of worms!!!


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