• Alexey Budankov's avatar
    perf record: Encode -k clockid frequency into Perf trace · cf790516
    Alexey Budankov authored
    Store -k clockid frequency into Perf trace to enable timestamps
    derived metrics conversion into wall clock time on reporting stage.
    
    Below is the example of perf report output:
    
      tools/perf/perf record -k raw -- ../../matrix/linux/matrix.gcc
      ...
      [ perf record: Captured and wrote 31.222 MB perf.data (818054 samples) ]
    
      tools/perf/perf report --header
      # ========
      ...
      # event : name = cycles:ppp, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, enable_on_exec = 1, task = 1, precise_ip = 3, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1, use_clockid = 1, clockid = 4
      ...
      # clockid frequency: 1000 MHz
      ...
      # ========
    Signed-off-by: default avatarAlexey Budankov <alexey.budankov@linux.intel.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Link: http://lkml.kernel.org/r/23a4a1dc-b160-85a0-347d-40a2ed6d007b@linux.intel.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    cf790516
header.h 4.95 KB