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perf probe: Support multiple probes on different binaries

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Support multiple probes on different binaries with just
one command.

In the result, this example sets up the probes on icmp_rcv in
kernel, on main and set_target in perf, and on pcspkr_event
in pcspker.ko driver.
  -----
  # perf probe -a icmp_rcv -x ./perf -a main -a set_target \
   -m /lib/modules/4.0.0-rc5+/kernel/drivers/input/misc/pcspkr.ko \
   -a pcspkr_event
  Added new event:
    probe:icmp_rcv       (on icmp_rcv)

  You can now use it in all perf tools, such as:

          perf record -e probe:icmp_rcv -aR sleep 1

  Added new event:
    probe_perf:main      (on main in /home/mhiramat/ksrc/linux-3/tools/perf/perf)

  You can now use it in all perf tools, such as:

          perf record -e probe_perf:main -aR sleep 1

  Added new event:
    probe_perf:set_target (on set_target in /home/mhiramat/ksrc/linux-3/tools/perf/perf)

  You can now use it in all perf tools, such as:

          perf record -e probe_perf:set_target -aR sleep 1

  Added new event:
    probe:pcspkr_event   (on pcspkr_event in pcspkr)

  You can now use it in all perf tools, such as:

          perf record -e probe:pcspkr_event -aR sleep 1
  -----

Reported-by: Arnaldo Carvalho de Melo <acme@infradead.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150401102539.17137.46454.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu 2015-04-01 19:25:39 +09:00 • committed by Arnaldo Carvalho de Melo
parent 5e78c69b72
commit 7afb3fab39
3 changed files with 13 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

5
tools/perf/util/probe-event.c
View file

@ -1906,6 +1906,7 @@ void clear_perf_probe_event(struct perf_probe_event *pev)
free(pev->event);
free(pev->group);
free(pev->target);
clear_perf_probe_point(&pev->point);
for (i = 0; i < pev->nargs; i++) {
@ -2654,7 +2655,7 @@ struct __event_package {
};
int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
int max_tevs, const char *target, bool force_add)
int max_tevs, bool force_add)
{
int i, j, ret;
struct __event_package *pkgs;
@ -2678,7 +2679,7 @@ int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
ret = convert_to_probe_trace_events(pkgs[i].pev,
&pkgs[i].tevs,
max_tevs,
target);
pkgs[i].pev->target);
if (ret < 0)
goto end;
pkgs[i].ntevs = ret;