• David Carrillo-Cisneros's avatar
    perf tools: Add feature header record to pipe-mode · e9def1b2
    David Carrillo-Cisneros authored
    Add header record types to pipe-mode, reusing the functions
    used in file-mode and leveraging the new struct feat_fd.
    
    For alignment, check that synthesized events don't exceed
    pagesize.
    
    Add the perf_event__synthesize_feature event call back to
    process the new header records.
    
    Before this patch:
    
      $ perf record -o - -e cycles sleep 1 | perf report --stdio --header
      [ perf record: Woken up 1 times to write data ]
      [ perf record: Captured and wrote 0.000 MB - ]
      ...
    
    After this patch:
      $ perf record -o - -e cycles sleep 1 | perf report --stdio --header
      # ========
      # captured on: Mon May 22 16:33:43 2017
      # ========
      #
      # hostname : my_hostname
      # os release : 4.11.0-dbx-up_perf
      # perf version : 4.11.rc6.g6277c80
      # arch : x86_64
      # nrcpus online : 72
      # nrcpus avail : 72
      # cpudesc : Intel(R) Xeon(R) CPU E5-2696 v3 @ 2.30GHz
      # cpuid : GenuineIntel,6,63,2
      # total memory : 263457192 kB
      # cmdline : /root/perf record -o - -e cycles -c 100000 sleep 1
      # HEADER_CPU_TOPOLOGY info available, use -I to display
      # HEADER_NUMA_TOPOLOGY info available, use -I to display
      # pmu mappings: intel_bts = 6, uncore_imc_4 = 22, uncore_sbox_1 = 47, uncore_cbox_5 = 33, uncore_ha_0 = 16, uncore_cbox
      [ perf record: Woken up 1 times to write data ]
      [ perf record: Captured and wrote 0.000 MB - ]
      ...
    
    Support added for the subcommands: report, inject, annotate and script.
    Signed-off-by: default avatarDavid Carrillo-Cisneros <davidcc@google.com>
    Acked-by: default avatarDavid Ahern <dsahern@gmail.com>
    Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: He Kuang <hekuang@huawei.com>
    Cc: Masami Hiramatsu <mhiramat@kernel.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Paul Turner <pjt@google.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Simon Que <sque@chromium.org>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Wang Nan <wangnan0@huawei.com>
    Link: http://lkml.kernel.org/r/20170718042549.145161-16-davidcc@google.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    e9def1b2
perf.data-file-format.txt 12.1 KB