Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 23/25] perf tools: Disallow PMU events intel_pt and intel_bts until there is support | Date | Wed, 27 May 2015 12:39:08 -0300 |
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From: Adrian Hunter <adrian.hunter@intel.com>
Disallow PMU events intel_pt and intel_bts until the tools support them.
By default any PMU is selectable as an event but until the tools have intel_pt and intel_bts support using them would result in no data being recorded without any indication as to why.
Before the change:
$ perf record -e intel_bts// sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.008 MB perf.data ] $ perf report --stdio Error: The perf.data file has no samples!
After the change:
$ perf record -e intel_bts// sleep 1 invalid or unsupported event: 'intel_bts//' Run 'perf list' for a list of valid events
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1432295653-13989-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/pmu.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 244c66f89891..5d3ab7c8ceaf 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -442,6 +442,10 @@ static struct perf_pmu *pmu_lookup(const char *name) LIST_HEAD(aliases); __u32 type; + /* No support for intel_bts or intel_pt so disallow them */ + if (!strcmp(name, "intel_bts") || !strcmp(name, "intel_pt")) + return NULL; + /* * The pmu data we store & need consists of the pmu * type value and format definitions. Load both right -- 2.1.0
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