From: Mark Watts <m.watts@mrw.demon.co.uk>
To: linux-kernel@vger.kernel.org
Subject: Re: Xeon processors &&Hyper-Threading
Date: Sat, 14 Jun 2003 14:50:11 +0100 [thread overview]
Message-ID: <200306141450.11804.m.watts@mrw.demon.co.uk> (raw)
In-Reply-To: <Pine.LNX.4.53.0306131241330.5894@chaos>
> You recompile the kernel for SMP as well as P4. If the motherboard
> hasn't disabled HT capabilities, you will take full advantage of
> the processor under Linux. Whatever "full advantage" means, is
> not absolute, but whatever it is, will be used to its fullest.
> Basically, if the code is I/O bound, you'll not see any difference.
> If the code is compute-intensive, you will.
I discovered that you need the 'CPU Enumeration' part of ACPI to be enabled
otherwise the kernel only sees physical processors, not sibling HT processors
- shouldnt this be selected automatically when you select SMP ?
next prev parent reply other threads:[~2003-06-14 13:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-13 16:38 Xeon processors &&Hyper-Threading Joe
2003-06-13 16:39 ` Chris Friesen
2003-06-13 16:45 ` Richard B. Johnson
2003-06-14 13:50 ` Mark Watts [this message]
2003-06-16 21:49 ` James Cleverdon
2003-06-14 18:32 ` Joe
2003-06-14 19:08 ` Joe
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