From: "H. Peter Anvin" <hpa@zytor.com>
To: Bernd Eckenfels <ecki@lina.inka.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: ht CPU flag
Date: Fri, 18 May 2007 11:45:59 -0700 [thread overview]
Message-ID: <464DF467.8080108@zytor.com> (raw)
In-Reply-To: <E1Hp6er-0001aX-00@calista.eckenfels.net>
Bernd Eckenfels wrote:
> In article <Pine.LNX.4.64.0705182131030.25685@ns.armcci.am> you wrote:
>> I have Pentium D CPU, which many Windows utilities like cpuz, wcpuid,
>> everest identify as D 930 (Dual Core, 3GHz). From Intel site I find out
>> that it has no HT feature, nor Windows XP identify it as HT.
>
> the ht flag reported by the CPU and cpuinfo is not a reliable detection if
> HT is available on your CPU or your motherboard/bios.
>
>> Why do I have "ht" flag in cpuinfo?
>
> Because your CPU reports it. You will see that also in cpuz output.
>
> However, you can see ht in the sibblings value (for a single core it will be
> 2 if you have HT, I am not sure if it is 4 for a dual core CPU)
IIRC, the HT flag is also reported for multicore CPUs.
-hpa
next prev parent reply other threads:[~2007-05-18 18:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-18 16:47 ht CPU flag eugene
2007-05-18 17:54 ` Bernd Eckenfels
2007-05-18 18:45 ` H. Peter Anvin [this message]
2007-05-18 19:07 ` Siddha, Suresh B
2007-05-18 19:45 ` Bernd Eckenfels
2007-05-18 19:17 ` Chris Snook
2007-05-18 19:33 ` eugene
2007-05-18 19:51 ` Chris Snook
2007-05-19 5:18 ` eugene
2007-05-19 6:18 ` H. Peter Anvin
2007-05-19 8:33 ` eugene
2007-05-19 16:38 ` Bernd Eckenfels
2007-05-19 18:11 ` H. Peter Anvin
2007-05-19 12:13 ` eugene
2007-05-19 16:41 ` Bernd Eckenfels
2007-05-18 20:32 ` Bernd Eckenfels
2007-05-18 23:20 ` H. Peter Anvin
2007-05-19 21:07 ` eugene
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