Date: Fri, 20 Feb 2009 13:09:46 -0500 From: Mike Tancsa <mike@sentex.net> To: martinko <gamato@users.sf.net>, freebsd-stable@freebsd.org Subject: Re: What is the real number of CPUs ? -- was: Re: Problem with new Intel DX board and i7 Processor on reboot attempt (locks) Message-ID: <200902201852.n1KIqNp5007330@lava.sentex.ca> In-Reply-To: <gnkq1s$d3i$1@ger.gmane.org> References: <499C4E8E.1020403@denninger.net> <200902182230.n1IMUg78008294@lava.sentex.ca> <gnkq1s$d3i$1@ger.gmane.org>
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At 06:30 PM 2/19/2009, martinko wrote: >Hi, > >I don't get the numbers of CPUs -- AFAIK Core i7 has 4 cores with 2 >logical CPUs per core (hyper-threading?) and that makes 8 logical >CPUs. Above I see 8 cores per package (!) _but_ 8 x 2 = 16 while >only 8 CPUs are detected and started. Could someone explain pls ? The CPU is as you said, 4 actual cores plus their new HT tech. In the tests I did, the HT did help with compile times under RELENG_7 http://lists.freebsd.org/pipermail/freebsd-performance/2008-December/003635.html ---Mike
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