perf tools: Print lost samples due to BPF filter

Print the actual dropped sample count in the event stat.

  $ sudo perf record -o- -e cycles --filter 'period < 10000' \
      -e instructions --filter 'ip > 0x8000000000000000' perf test -w noploop | \
      perf report --stat -i-
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.058 MB - ]

  Aggregated stats:
                 TOTAL events:        469
                  MMAP events:        268  (57.1%)
                  COMM events:          2  ( 0.4%)
                  EXIT events:          1  ( 0.2%)
                SAMPLE events:         16  ( 3.4%)
                 MMAP2 events:         22  ( 4.7%)
          LOST_SAMPLES events:          2  ( 0.4%)
               KSYMBOL events:         89  (19.0%)
             BPF_EVENT events:         39  ( 8.3%)
                  ATTR events:          2  ( 0.4%)
        FINISHED_ROUND events:          1  ( 0.2%)
              ID_INDEX events:          1  ( 0.2%)
            THREAD_MAP events:          1  ( 0.2%)
               CPU_MAP events:          1  ( 0.2%)
          EVENT_UPDATE events:          2  ( 0.4%)
             TIME_CONV events:          1  ( 0.2%)
               FEATURE events:         20  ( 4.3%)
         FINISHED_INIT events:          1  ( 0.2%)
  cycles stats:
                SAMPLE events:          2
    LOST_SAMPLES (BPF) events:       4010
  instructions stats:
                SAMPLE events:         14
    LOST_SAMPLES (BPF) events:       3990

Signed-off-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: KP Singh <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Song Liu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions