Date: Wed, 11 Mar 2015 00:52:58 +0000 From: "Pokala, Ravi" <rpokala@panasas.com> To: "lokadamus@gmx.de" <lokadamus@gmx.de>, Rui Paulo <rpaulo@me.com> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: detecting hyperthreading Message-ID: <D124DF75.12F8C8%rpokala@panasas.com> In-Reply-To: <54FF1743.8080205@gmx.de> References: <D12358C5.12F652%rpokala@panasas.com> <9F2E1411-B517-4BC8-AF61-BB15EE35083C@me.com> <D123957A.12F6CA%rpokala@panasas.com> <54FF1343.1020705@gmx.de> <D1246191.12F7D6%rpokala@panasas.com> <54FF1743.8080205@gmx.de>
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-----Original Message----- From: "lokadamus@gmx.de" <lokadamus@gmx.de> Date: 2015-03-10, Tuesday at 09:09 To: Ravi Pokala <rpokala@panasas.com>, Rui Paulo <rpaulo@me.com> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: detecting hyperthreading >Well, i don't know, how a new system is showing the following sequence: >dmesg | grep FreeBSD/SMP | grep HTT >Answer: FreeBSD/SMP: 1 package(s) x 1 core(s) x 2 HTT threads > >Value $? is zero, but i will not reboot my system to look how it will >change, when HTT is disabled. > >I make a portupgrade and this will need some hour. ;) :-) I could probably use the machdep.hyperthreading_allowed *tunable* in loader.conf to get a system running w/ HT disabled and see what the kernel reports there, but all the suitable systems are shared, so I need to coordinate w/ others. -Ravi
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