Date: Sat, 08 Oct 2005 01:31:19 -0700 From: Paul Saab <ps@freebsd.org> To: Joseph Koshy <joseph.koshy@gmail.com>, arch@freebsd.org Subject: Re: Determining CPU topology on multi-core CPUs Message-ID: <434783D7.4030701@freebsd.org> In-Reply-To: <84dead720510072043x45a2181ch5eea8cbfe9ea50cb@mail.gmail.com> References: <84dead720510072043x45a2181ch5eea8cbfe9ea50cb@mail.gmail.com>
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you want hyperthreading_cpus_mask Joseph Koshy wrote: > On multi-core P4/HTT CPU packages I need to distinguish between > physically distinct CPUs in separate cores from HT CPU > (a.k.a., 'threads') pairs. > > What is the best way a driver can obtain the CPU topology > of a system? > > The bits in 'logical_cpus_mask' do not distinguish between > multi-core and HT cpus. > > -- > FreeBSD Volunteer, http://people.freebsd.org/~jkoshy > _______________________________________________ > freebsd-arch@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arch > To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org" > >
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