diff options
| author | Ingo Molnar | 2011-03-30 09:08:20 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2011-03-30 09:08:39 +0200 |
| commit | 652d78fd7a9ebd881290d6bbbc85925c06b907b4 (patch) | |
| tree | 5ddef0bcae62e7b95fb8702e4e946d4b5d4e9dc6 /tools/perf/util | |
| parent | 9f644c4ba86b76159d36747fda7da496f72a1872 (diff) | |
| parent | ca6a42586fae639ff9e5285d9bdc550fcb1b8d41 (diff) | |
Merge commits 'ca6a42586fae' and 'c286c419c784' into perf/urgent
Pick up these two commits from Arnaldo's perf/core tree:
ca6a42586fae: perf tools: Emit clearer message for sys_perf_event_open ENOENT return
c286c419c784: perf tools: Fixup exit path when not able to open events
As they are really fixes we want to have sooner than laer.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/debug.c | 10 | ||||
| -rw-r--r-- | tools/perf/util/debug.h | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c index d4536a9e0d8c..155749d74350 100644 --- a/tools/perf/util/debug.c +++ b/tools/perf/util/debug.c @@ -57,6 +57,16 @@ void ui__warning(const char *format, ...) } #endif +void ui__warning_paranoid(void) +{ + ui__warning("Permission error - are you root?\n" + "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n" + " -1 - Not paranoid at all\n" + " 0 - Disallow raw tracepoint access for unpriv\n" + " 1 - Disallow cpu events for unpriv\n" + " 2 - Disallow kernel profiling for unpriv\n"); +} + void trace_event(union perf_event *event) { unsigned char *raw_event = (void *)event; diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h index 93516cf4682c..fd53db47e3de 100644 --- a/tools/perf/util/debug.h +++ b/tools/perf/util/debug.h @@ -36,5 +36,6 @@ int ui_helpline__show_help(const char *format, va_list ap); #endif void ui__warning(const char *format, ...) __attribute__((format(printf, 1, 2))); +void ui__warning_paranoid(void); #endif /* __PERF_DEBUG_H */ |