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SubjectRe: [PATCH 00/11] generic software counters -v2

* Peter Zijlstra <> wrote:

> This patch set improves the current software counters by
> providing sampling events for most of them.
> The clock based software counters use hrtimers to generate
> events, allowing sample based profiling without hardware
> support -- obviously this has limited functionality for kernal
> based profiling since we disable interrupts quite frequently,
> but should be good for userspace.
> Other events like pagefaults insert simple hooks into the
> actual pagefault code to generate these events.

Very nice series! Applied to tip:core/locking and
tip:perfcounters/core - thanks Peter!

Fixed a trivial !PERF_COUNTERS build failure as well.

> Future work (in-progress) will hook into the tracepoint
> infrastructure to to provide profiling events.


Especially for pagefaults we have a number of callbacks there:
kmmio, kprobes, kmemcheck, tracing, perfcounters - they could
indeed all be consolidated step by step onto a tracepoint.


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