[PATCH V3 0/6] Generalise ARM perf-events backend for oprofile

[Matt Fleming]

On Mon, Sep 13, 2010 at 10:51:37AM +0200, Ingo Molnar wrote:
> 
> * Matt Fleming <matt at console-pimps.org> wrote:
> 
> > On Mon, Sep 13, 2010 at 09:13:32AM +0200, Marc Titinger wrote:
> > > 
> > > Hi, 
> > > 
> > > I'm just being curious : do these patches change the way those chips 
> > > should be supported, that do not have a PMU-like IP, but implement 
> > > PC-sampling thanks to a general purpose timer (not the system timer) 
> > > ?
> > 
> > CPUs that do not have a PMU are not required to use the perf-events 
> > oprofile backend, it is entirely optional. The pc-sampling timer in 
> > oprofile is not affected by this series.
> 
> It should still work fine though: a generalized oprofile backend should 
> simply use hrtimer based events. That also has a chance to be higher 
> quality than the system time fallback, on PMU-less (but high-res-timer 
> capable) systems.

Yeah, that's a good point. It would make a nice addition to this patch
series. I may get chance to take a look at it at some point.