lkml.org 
[lkml]   [2011]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH] perf stat: tell user about unsupported events in the list
    Date
    Similar to perf-record, tell user about unsupported events
    that will not be counted if invoked in verbose mode.

    e.g.,
    perf stat -e dTLB-prefetch-misses -v -- sleep 1
    dTLB-prefetch-misses event is not supported by the kernel.
    dTLB-prefetch-misses: 0 0 0

    Performance counter stats for 'sleep 1':

    <not counted> dTLB-prefetch-misses

    1.001884783 seconds time elapsed

    Signed-off-by: David Ahern <dsahern@gmail.com>
    ---
    tools/perf/builtin-stat.c | 6 +++++-
    1 files changed, 5 insertions(+), 1 deletions(-)

    diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
    index c8b535b..602c3c9 100644
    --- a/tools/perf/builtin-stat.c
    +++ b/tools/perf/builtin-stat.c
    @@ -377,8 +377,12 @@ static int run_perf_stat(int argc __used, const char **argv)

    list_for_each_entry(counter, &evsel_list->entries, node) {
    if (create_perf_stat_counter(counter) < 0) {
    - if (errno == EINVAL || errno == ENOSYS || errno == ENOENT)
    + if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) {
    + if (verbose)
    + ui__warning("%s event is not supported by the kernel.\n",
    + event_name(counter));
    continue;
    + }

    if (errno == EPERM || errno == EACCES) {
    error("You may not have permission to collect %sstats.\n"
    --
    1.7.4.4


    \
     
     \ /
      Last update: 2011-04-30 00:07    [W:0.034 / U:30.280 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site