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SubjectRe: [PATCH v9 4/4] perf probe: Support SDT markers having reference counter (semaphore)

Arnaldo,

I'm going to be playing with some of the probe code which may conflict
with these patches, so I would like to pull these in my tree. But this
patch requires an Acked-by from you before I can pull it in.

You OK with this?

Thanks!

-- Steve


On Mon, 20 Aug 2018 10:12:50 +0530
Ravi Bangoria <ravi.bangoria@linux.ibm.com> wrote:

> With this, perf buildid-cache will save SDT markers with reference
> counter in probe cache. Perf probe will be able to probe markers
> having reference counter. Ex,
>
> # readelf -n /tmp/tick | grep -A1 loop2
> Name: loop2
> ... Semaphore: 0x0000000010020036
>
> # ./perf buildid-cache --add /tmp/tick
> # ./perf probe sdt_tick:loop2
> # ./perf stat -e sdt_tick:loop2 /tmp/tick
> hi: 0
> hi: 1
> hi: 2
> ^C
> Performance counter stats for '/tmp/tick':
> 3 sdt_tick:loop2
> 2.561851452 seconds time elapsed
>
> Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
> Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>

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