Date: Sat, 1 Feb 2020 18:11:12 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: David Wolfskill <david@catwhisker.org>, freebsd-hackers@freebsd.org Subject: Re: HT detetct Message-ID: <20200201151112.GA8012@zxy.spb.ru> In-Reply-To: <20200201143141.GL1270@albert.catwhisker.org> References: <20200201142613.GA8028@zxy.spb.ru> <20200201143141.GL1270@albert.catwhisker.org>
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On Sat, Feb 01, 2020 at 06:31:41AM -0800, David Wolfskill wrote: > On Sat, Feb 01, 2020 at 05:26:14PM +0300, Slawa Olhovchenkov wrote: > > No other way to detect HT CPU but from kvm get cpu_apic_ids and from > > kvm get cpu_present[] and check .cpu_hyperthread? > > .... > > Not sure what context you have here (driver? shell script? other?). kvm in driver or shell script? c/c++ program. > But the output of "sysctl kern.smp.threads_per_core" may be of interest > or use in some of those contexts. # sysctl kern.smp.threads_per_core sysctl: unknown oid 'kern.smp.threads_per_core' # sysctl kern.smp.threads_per_core kern.smp.threads_per_core: 2 Hmm, like 12.1 and up. OK, thanks!
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