Date: Wed, 24 Aug 2005 23:58:23 -0700 From: Colin Percival <cperciva@freebsd.org> To: "Justin R. Smith" <jsmith@drexel.edu> Cc: freebsd-current@freebsd.org Subject: Re: On a hyperthreaded system, top and gnome system monitor only report one processor Message-ID: <430D6C0F.1070909@freebsd.org> In-Reply-To: <430D68D4.50609@drexel.edu> References: <430D68D4.50609@drexel.edu>
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Justin R. Smith wrote: > FreeBSD jsmith.org 6.0-BETA3 FreeBSD 6.0-BETA3 #0: Tue Aug 23 08:04:37 > EDT 2005 jsmith@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
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