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Re: [PATCH RFC 3/3] x86: use mwait for trigger API

From:  Arjan van de Ven <>
To:  Jeremy Fitzhardinge <>
Subject:  Re: [PATCH RFC 3/3] x86: use mwait for trigger API
Date:  Sat, 16 Aug 2008 10:44:04 -0700
Message-ID:  <>
Cc:  Ingo Molnar <>, Jens Axboe <>, Peter Zijlstra <>, Christian Borntraeger <>, Linux Kernel Mailing List <>, Rusty Russell <>
Archive-link:  Article

On Sat, 16 Aug 2008 09:34:26 -0700
Jeremy Fitzhardinge <> wrote:

> If the cpu implements monitor/mwait, use it for the trigger API.
> TODO: work out if any mwait hints are going to be useful here.

monitor/mwait is rather really expensive.. are we really sure we want
to use this?
(from an Intel cpu perspective the answer is very likely no; but I don't
know what AMD does here)

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