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SubjectRe: [RFC PATCH perf/core v2 16/16] perf probe: Accept %sdt and %cached event name
On Wed, Jul 15, 2015 at 06:15:44PM +0900, Masami Hiramatsu wrote:
> To improbe usability, support %[PROVIDER:]SDTEVENT format to
> add new probes on SDT and cached events.

Ah, you meant we can skip the provider if the event name is unique..


>
> e.g.
> ----
> # perf probe -x /lib/libc-2.17.so %lll_lock_wait_private

Maybe we can also skip the target path (-x) too in this case.

Thanks,
Namhyung


> Added new event:
> libc:lll_lock_wait_private (on %lll_lock_wait_private in
> /usr/lib/libc-2.17.so)
>
> You can now use it in all perf tools, such as:
>
> perf record -e libc:lll_lock_wait_private -aR sleep 1
>
> # perf probe -l | more
> libc:lll_lock_wait_private (on __lll_lock_wait_private+21
> in /usr/lib/libc-2.17.so)
> ----
>
> Note that this is not only for SDT events, but also normal
> events with event-name.
>
> e.g. define "myevent" on cache (-n doesn't add the real probe)
> ----
> # perf probe -x ./perf --cache -n --add 'myevent=dso__load $params'
> ----
> Reuse the "myevent" from cache as below.
> ----
> # perf probe -x ./perf %myevent
> ----
>
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>


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