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authorNamhyung Kim <namhyung.kim@lge.com>2012-04-26 09:15:20 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-05-02 22:24:14 +0400
commit770a34a38b74982724dbb099225944b415f90281 (patch)
tree84a55ee3eb28ca2319b33a982e6f61619a502dde /tools/perf
parentb809ac100e2f12ebf1b58ff522dba15651a77d27 (diff)
downloadlinux-770a34a38b74982724dbb099225944b415f90281.tar.xz
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>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/usage.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/perf/util/usage.c b/tools/perf/util/usage.c
index 0a1a885a5914..228f0a558872 100644
--- a/tools/perf/util/usage.c
+++ b/tools/perf/util/usage.c
@@ -132,4 +132,18 @@ void perf_target__validate(struct perf_target *target)
sleep(1);
target->uid_str = NULL;
}
+
+ /* UID and CPU are mutually exclusive */
+ if (target->uid_str && target->cpu_list) {
+ ui__warning("UID switch overriding CPU\n");
+ sleep(1);
+ target->cpu_list = NULL;
+ }
+
+ /* PID/UID and SYSTEM are mutually exclusive */
+ if ((target->tid || target->uid_str) && target->system_wide) {
+ ui__warning("PID/TID/UID switch overriding CPU\n");
+ sleep(1);
+ target->system_wide = false;
+ }
}