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Date: Tue, 25 Dec 2007 11:53:06 +0800
From: David Xu <davidxu@FreeBSD.org>
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To: Brian McGinty <brian.mcginty@gmail.com>
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Cc: arch@FreeBSD.org, Robert Watson <rwatson@FreeBSD.org>
Subject: Re: Linux compatible setaffinity.
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Brian McGinty wrote:
> On Dec 23, 2007 5:44 PM, David Xu <davidxu@freebsd.org> wrote:
>> Robert Watson wrote:
>>> On Fri, 21 Dec 2007, David Xu wrote:
>>>
>>>> I don't say no to these interfaces, but there is a need to tell user
>>>> which cpus are sharing cache, or memory distance is closest enough,
>>>> and which cpus are servicing interrupts, e.g, network interrupt and
>>>> disks etc, etc, otherwise, blindly setting cpu affinity mask only can
>>>> shoot itself in the foot.
>>> While the Mac OS X API is pretty Mach-specific, it's worth taking a look
>>> at their recently-announced affinity API:
>>>
>>> http://developer.apple.com/releasenotes/Performance/RN-AffinityAPI/index.html
>>>
>>>
>>> Robert N M Watson
>>> Computer Laboratory
>>> University of Cambridge
>>>
>>
>> I like the interfaces, it is more flexible.
> 
> I agree. May I as k what's being planned? It's Jeffs' call finally I think.
> 
> Brian.

I don't have plan. ;-) If I understand it correctly, it is a hint to
scheduler, it is better describing thread relationship, while Jeff's
interface is a hard cpu binding interface, it is still needed in some 
circumstance.

Regards,