Re: wrapping (some) ipis in arch/x86/

["Cherry G. Mathew" <cherry.g.mathew%gmail.com@localhost>]

On 13 August 2011 11:45, Christos Zoulas <christos%astron.com@localhost> wrote:
> In article 
> <CAEmhiu7cetkMHgK=F1fzt2R9KTb8q0csyEA=1-m+-VWEJDnMFA%mail.gmail.com@localhost>,
> Cherry G. Mathew <cherry.g.mathew%gmail.com@localhost> wrote:
>>On 13 August 2011 11:26, Christos Zoulas <christos%astron.com@localhost> 
>>wrote:
>>> In article <8762m4qlm8.fsf%zyx.in@localhost>, Cherry G. Mathew 
>>>  <cherry%zyx.in@localhost> wrote:
>>>>ftp://ftp.netbsd.org/pub/NetBSD/misc/cherry/tmp/wrap_ipi.diff
>>>>
>>>>Hi,
>>>>
>>>>I'd like to ask peoples' opinions about the above patch. This would
>>>>remove a couple of #ifdef XEN/#endif pairs I had to introduce
>>>>lately.
>>>
>>> If those are performance critical, perhaps they should be inlined?
>>
>>
>>I don't think they are - the first is a HALT ipi and the second
>>"kicks" other sleeping CPUS via cpu_needs_resched()
>
> So the first one isn't, but how often is the second one called?
>

Once per tick at worst.

-- 
~Cherry