Messages in this thread | | | Subject | Re: [RFC][PATCH 3/9] perf: export registerred pmus via sysfs | From | Peter Zijlstra <> | Date | Tue, 11 May 2010 08:34:54 +0200 |
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On Mon, 2010-05-10 at 21:25 +0100, Will Deacon wrote: > Another interesting ARM-ism is the vast potential for uncore event > sources in SoC devices. The `node' terminology seems a bit confusing > here, as there may be counters situated at various points of a bus > hierarchy which monitor various types of transactions for example. I > suppose these could live under /sys/devices/system/bus/... ?
Right there are more such systems, and yes hooking them into the appropriate machine topology like PCI busses is exactly the intent.
I already mentioned the GPU PMUs living in the appropriate PCI device. But yes, there are far more exotic configurations out there.
> I would > expect these kind of counters to be controlled via raw events because > having a list of discrete events doesn't really make sense [for example, > if I want to count all bursts of a given size, I can encode the burst > size into the event number].
Raw is fine, its only once these things start to converge and show common traits that adding a 'generic' event class becomes useful, and this is something that can always be done later. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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