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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 <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>
This commit is contained in:
Adrian Hunter 2015-05-22 14:53:58 +03:00 committed by Arnaldo Carvalho de Melo
parent 2f80dd4488
commit 9b5d1c2955
1 changed files with 4 additions and 0 deletions
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4
tools/perf/util/pmu.c
View File

@ -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