[RFC PATCH] perf: Store relevant events in a hlist

[Frederic Weisbecker]

On Fri, Mar 05, 2010 at 10:39:29AM +0100, Peter Zijlstra wrote:
> On Fri, 2010-03-05 at 08:00 +0100, Frederic Weisbecker wrote:
> > Each time a trace event triggers, we walk through the entire
> > list of events from the active contexts to find the perf events
> > that match the current one.
> > 
> > This is wasteful. To solve this, we maintain a per cpu list of
> > the active perf events for each running trace events and we
> > directly commit to these.
> 
> Right, so this seems a little trace specific. I once thought about using
> a hash table to do this for all software events. It also keeps it all
> nicely inside perf_event.[ch].


What do you think about this version?
It builds but crashes on runtime and doesn't handle
cpu hotplug yet. Before spending more time in debugging/fixing,
I'd like to know your opinion about the general architecture.

Thanks.

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