Date: Wed, 11 Mar 2015 08:14:34 +0100 (CET) From: Wojciech Puchar <wojtek@puchar.net> To: "Pokala, Ravi" <rpokala@panasas.com> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: detecting hyperthreading Message-ID: <alpine.BSF.2.11.1503110814220.866@laptop.wojtek.intra> In-Reply-To: <D12358C5.12F652%rpokala@panasas.com> References: <D12358C5.12F652%rpokala@panasas.com>
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dmesg look at "HTT" CPU capability On Mon, 9 Mar 2015, Pokala, Ravi wrote: > Hi folks, > > There used to be a sysctl, "machdep.hyperthreading_allowed", which > indicated whether or not the kernel was using hyperthreaded cores. It > looks like it was removed sometime between 8 and 9, for perfectly good > reasons (https://svnweb.freebsd.org/base?view=revision&revision=222853). > > That said, is there currently a way to tell at runtime from userland if > hyperthreading is enabled or not? > > Thanks, > > Ravi > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > >
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