Re: [PATCH] tracing/filters: allow event filters to be set only whennot tracing

From: Steven Rostedt
Date: Fri Apr 03 2009 - 12:43:44 EST



On Fri, 3 Apr 2009, Ingo Molnar wrote:
> >
> > My kneejerk reaction is "why would anyone want to trace the idle
> > loop?"
>
> heh :-)
>
> Idle enter/exit events are useful to tune power use for example. The
> more events we have there, the more we prevent the CPU from slowly
> going into deep sleep mode.

I can say I use it a lot. I'm still needing a way to set the function pid
recorder to 0 since the conversion to the pid structure. There are times
I only want to trace the interrupts that happen in the idle loop.

-- Steve

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