Messages in this thread | | | Date | Mon, 18 Jan 2010 17:22:12 +0100 | From | Frederic Weisbecker <> | Subject | Re: [PATCH] perf_events: improve x86 event scheduling (v5) |
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On Mon, Jan 18, 2010 at 03:59:58PM +0100, Peter Zijlstra wrote: > On Mon, 2010-01-18 at 15:53 +0100, Frederic Weisbecker wrote: > > > Not sure what you both mean by this core VS uncore thing :) > > Is it about hardware counters that apply to single hardware threads > > or shared among them inside a same core? > > Yeah intel has two PMUs, one per logical cpu and one per socket/node. We > currently don't support the node one yet. > > So the thing with these socket wide things is is that they are not able > to tell where the event originated, so relating that back to a task is > only possible when there's only one task running. >
Ah ok.
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