Speaking of which, is hyperthreading in 6.0 with ULE to the point where it actually increases performance for multi-threaded processes or parallel compilations (make -j N)? Obviously this is situation dependent. I guess the better question is whether HT is able to provide a performance increase in 6.0 like it purports to do? I've heard that it's not quite "there yet", so I'm cautious about enabled SMP support and HT support on a P4-HT system. Josh On 8/24/05, Colin Percival <cperciva_at_freebsd.org> wrote: > Justin R. Smith wrote: > > FreeBSD jsmith.org 6.0-BETA3 FreeBSD 6.0-BETA3 #0: Tue Aug 23 08:04:37 > > EDT 2005 jsmith_at_jsmith.org:/usr/obj/usr/src/sys/MYKERNEL i386 > > > > Top lists all process as being run by processor 0 > > > > The gnome system monitor lists only processor 0 as well (under gentoo > > linux it shows two). > > Hyperthreading is disabled by default for security reasons. If you want > to enable it (which is generally safe on single-user systems), you should > add the following line to /boot/loader.conf : > > machdep.hyperthreading_allowed=1 > > Colin Percival > FreeBSD Security Officer > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" >Received on Thu Aug 25 2005 - 05:35:40 UTC
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