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    SubjectRe: [RFC][PATCH 3/9] perf: export registerred pmus via sysfs
    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.
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      Last update: 2010-05-12 10:11    [W:0.041 / U:12.720 seconds]
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