From 9b5d1c29556989aa9dc1240566e78806ddefd160 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Fri, 22 May 2015 14:53:58 +0300 Subject: [PATCH] perf tools: Disallow PMU events intel_pt and intel_bts until there is support 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 Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1432295653-13989-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- 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