PERF_SAMPLE_IP            1 << 0
PERF_SAMPLE_TID           1 << 1
PERF_SAMPLE_TIME          1 << 2
PERF_SAMPLE_ADDR          1 << 3
PERF_SAMPLE_READ          1 << 4
PERF_SAMPLE_CALLCHAIN     1 << 5
PERF_SAMPLE_ID            1 << 6
PERF_SAMPLE_CPU           1 << 7
PERF_SAMPLE_PERIOD        1 << 8
PERF_SAMPLE_STREAM_ID     1 << 9
PERF_SAMPLE_RAW           1 << 10
PERF_SAMPLE_BRANCH_STACK  1 << 11
PERF_SAMPLE_REGS_USER     1 << 12
PERF_SAMPLE_STACK_USER    1 << 13
PERF_SAMPLE_WEIGHT        1 << 14
PERF_SAMPLE_DATA_SRC      1 << 15
PERF_SAMPLE_IDENTIFIER    1 << 16
PERF_SAMPLE_TRANSACTION   1 << 17
PERF_SAMPLE_REGS_INTR     1 << 18