Re: [RFC PATCH 00/32] Nohz cpusets (was: Nohz Tasks)

Paul Menage
2011-08-20T07:46:14Z

On Thu, Aug 18, 2011 at 6:25 AM, Frederic Weisbecker <fweisbec@gmail.com> wrote:
>>
>> Why not do it unconditionally?  That is, if all the conditions are
>> fulfilled, disable the tick regardless of any cpuset settings.
>
> Because I'm not sure it's a win on every workload. This involves
> some hooks here and there (syscall slow path), IPIs, etc...

I agree with Avi. I'd be inclined to investigate further to see if
there are any important workloads on which it's not a win - and then
add the extra complexity to control it from cpusets if necessary.
Unless there's really a good reason to make it configurable, it's
simpler to make it unconditional.

Paul