Re: [RFC PATCH 1/2] Marker probes in futex.c

[Ingo Molnar <mingo@elte.hu>]

* Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote:

> * Ingo Molnar (mingo@elte.hu) wrote:
> > 
> > * Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> > 
> > > See, these tracer tools are my nightmare as member of an 
> > > enterprise linux team. They'll make an already hard job even 
> > > harder, no thanks!
> > 
> > i'm clearly NAK-ing all futex trace hooks until the true impact of 
> > the whole marker facility is better understood. I've tried them for 
> > the scheduler and they were a clear failure: too bloated and too 
> > persistent.
> 
> I have not seen any counter argument for the in-depth analysis of the 
> instruction cache impact of the optimized markers I've done. Arguing 
> that the markers are "bloated" based only on "size kernel/sched.o" 
> output is a bit misleading.

uhm, i'm not sure what you mean - how else would you quantify bloat than 
to look at the size of the affected subsystem?

	Ingo