On Saturday 26 March 2005 22:45, Anthony Atkielski wrote: > [EMAIL PROTECTED] writes: > > Yes, the theory is very nice; you've done a nice > > job reading Intel's marketing garb. > > I haven't read their marketing materials. I'm simply going by the > technical descriptions I've read of the architecture. > > > However if you don't have a specific hyperthreading-aware scheduler > > and particularly well-written, threaded applications, you'll lose more > > than you'll gain. > > If that were true, then it would be equally true of systems with actual > multiple physical processors. In practice, multiple processors provide > an obvious performance gain, and hyperthreading does, too, although it's > much more modest than the gain obtained from physically independent > processors.
The situation is very different. Multiple processors can run multiple processes at the same time. A HT processor can only run two threads from the same process. And most software isn't multithreaded. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
