lkml.org 
[lkml]   [2003]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRE: [PATCH] idle using PNI monitor/mwait
Date
From
Alan,
Mwait is not dependent directly on the processor and any bus master
write will wake up the mwait. So, your example will also work.
Thanks,
Asit


> -----Original Message-----
> From: Alan Cox [mailto:alan@lxorguk.ukuu.org.uk]
> Sent: Wednesday, July 09, 2003 4:00 AM
> To: Nakajima, Jun
> Cc: Linus Torvalds; Linux Kernel Mailing List; Saxena, Sunil;
> Mallick, Asit K; Pallipadi, Venkatesh
> Subject: Re: [PATCH] idle using PNI monitor/mwait
>
>
> On Maw, 2003-07-08 at 22:23, Nakajima, Jun wrote:
> > Hi Linus,
> >
> > Attached is a patch that enables PNI (Prescott New Instructions)
> > monitor/mwait in kernel idle (opcodes are now public).
> Basically MWAIT
> > is similar to hlt, but you can avoid IPI to wake up the processor
> > waiting. A write (by another processor) to the address
> range specified
> > by MONITOR would wake up the processor waiting on MWAIT.
>
> Is mwait dependant on cached cpu memory and the cache
> exclusivity logic
> or directly on the processor. In other words can I use mwait in future
> to wait for DMA to hit a given location ? - Im mostly thinking about
> debugging uses
>
>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:46    [W:0.031 / U:0.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site