linux-kernel - Re: ht CPU flag

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Message-ID: <Pine.LNX.4.64.0705190023420.25685@ns.armcci.am>
Date:	Sat, 19 May 2007 00:33:44 +0500 (AMST)
From:	eugene@...armcci.am
To:	Chris Snook <csnook@...hat.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: ht CPU flag

On Fri, 18 May 2007, Chris Snook wrote:

> eugene@...armcci.am 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.
>>
>>  Why do I have "ht" flag in cpuinfo?
>>  -----------------------------------
>
> The "ht" flag merely means "I know how to report hyperthreaded logical 
> processors if I have them."  My Woodcrest Xeon 5110 and my Athlon64 X2 both 
> have the "ht" flag, and correctly report the zero hyperthreaded logical 
> processors they each have.
>
> 	-- Chris
>
>

Thanks, Chris.

Am I right that is chipset on mainboard, who is saying - "I know....", not 
CPU itself? Is it better to switch off HT support in BIOS?
Is it possible to generate CPU name as: "Pentium D 930" in /proc/cpuinfo?
On the other server I have some 2GHz HT Xeons which can't be identified on 
Intel site because of strange naming pattern.
I tried to find any utility for Linux to solve this, but it looks like 
everybody are using /pros/cpuinfo, which is not enough :)

Regards, Eugene.
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