Author: Robert Hyatt
Date: 12:26:01 12/17/02
Go up one level in this thread
On December 17, 2002 at 14:38:22, Gian-Carlo Pascutto wrote: >On December 17, 2002 at 12:50:48, Matt Taylor wrote: > >>Actually it doesn't work like that. The CPU has an existing bandwidth of 3 >>micro-ops/cycle. > >I was under the impression the P4 was much more limited than that >(don't remember the details though). > >>Now, I am no parallel researcher, but even my parallel code doesn't suffer >>overheads so large that it can't gain from HT. > >Depends on what the problem is. > >>You never said what "2 processes" was. Is it one physical CPU with HT or two >>physical CPUs without HT? > >2 physical CPUS with hyperthreading enabled running 2 processes > >(The case that breaks the scheduler) > >-- >GCP What makes that case so interesting? It is going to be fixed soon. It is already fixed in windows.net and apparently in XP server...
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