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Subject: RE: HT and idle = poll
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Nakajima, Jun" <jun.nakajima@intel.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Thu, 2003-03-06 at 21:15, Nakajima, Jun wrote:
> Linus,
> 
> That's correct. Basically mwait is similar to hlt, but you can avoid IPI to wake up the processor waiting. A write to the address specified by monitor wakes up the processor, unlike hlt.
> 
> So our plan is to use monitor/mwait in the idle loop, for example, in the kernel to lower the latency.

Thats nice. It means you've got the basis of the instructions (although not quite the same
exact functionality) as Brian Grayson proposed four years ago with Armadillo.

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