• Jiri Olsa's avatar
    perf record: Add --buildid-mmap option to enable PERF_RECORD_MMAP2's build id · e29386c8
    Jiri Olsa authored
    Add --buildid-mmap option to enable build id in PERF_RECORD_MMAP2 events.
    
    It will only work if there's kernel support for that and it disables
    build id cache (implies --no-buildid).
    
    It's also possible to enable it permanently via config option in
    ~/.perfconfig file:
    
      [record]
      build-id=mmap
    
    Also added build_id bit in the verbose output for perf_event_attr:
    
      # perf record --buildid-mmap -vv
      ...
      perf_event_attr:
        type                             1
        size                             120
        ...
        build_id                         1
    
    Adding also missing text_poke bit.
    
    Committer testing:
    
      $ perf record -h build
    
       Usage: perf record [<options>] [<command>]
          or: perf record [<options>] -- <command> [<options>]
    
          -B, --no-buildid      do not collect buildids in perf.data
          -N, --no-buildid-cache
                                do not update the buildid cache
              --buildid-all     Record build-id of all DSOs regardless of hits
              --buildid-mmap    Record build-id in map events
    
      $
    
      $ perf record --buildid-mmap sleep 1
      Failed: no support to record build id in mmap events, update your kernel.
      $
    
    After adding the needed kernel bits in a test kernel:
    
      $ perf record -vv --buildid-mmap sleep 1 |& grep -m1 build
      Enabling build id in mmap2 events.
      $ perf evlist -v
      cycles:u: size: 120, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|PERIOD, read_format: ID, disabled: 1, inherit: 1, exclude_kernel: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1, build_id: 1
      $
    Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
    Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    Acked-by: default avatarIan Rogers <irogers@google.com>
    Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Alexei Budankov <abudankov@huawei.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Michael Petlan <mpetlan@redhat.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Song Liu <songliubraving@fb.com>
    Cc: Stephane Eranian <eranian@google.com>
    Link: http://lore.kernel.org/lkml/20201214105457.543111-16-jolsa@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    e29386c8
perf_event_attr_fprintf.c 4.93 KB