perf tools: Check more combinations of PID/TID, UID and CPU switches
authorNamhyung Kim <namhyung.kim@lge.com>
Thu, 26 Apr 2012 05:15:20 +0000 (14:15 +0900)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 2 May 2012 18:24:14 +0000 (15:24 -0300)
commit770a34a38b74982724dbb099225944b415f90281
tree84a55ee3eb28ca2319b33a982e6f61619a502dde
parentb809ac100e2f12ebf1b58ff522dba15651a77d27
perf tools: Check more combinations of PID/TID, UID and CPU switches

There were some combinations of these switches that are not so
appropriate IMHO.

Since there are implicit priorities between them and they worked well
anyway, but it ends up opening useless duplicated events.

For example, 'perf stat -t <pid> -a' will open multiple events for the
thread instead of one.

Add explicit checks and warn user in perf_target__validate().

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1335417327-11796-7-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/usage.c