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deps: backport 9da3ab6 from V8 upstream #3609

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Commits on Nov 5, 2015

  1. deps: backport 9da3ab6 from V8 upstream

    This patch exposes a new flag perf_basic_prof_only_functions (disabled by
    default) that can be useful for the use-case of running always-on profiling on
    long running production jobs.
    
    Original commit
    v8/v8@9da3ab6
      New flag --perf_basic_prof_only_functions
      Restricts linux perf-event code range reporting to functions only (i.e. on
      stubs.) While this makes the gathered ticks less accurate, it reduces the
      growth of the /tmp/perf-${pid}.map file.
    
      BUG=v8:3453
      R=hablich@chromium.org,danno@chromium.org
      LOG=N
    
      Review URL: https://codereview.chromium.org/1292743002
    
      Cr-Commit-Position: refs/heads/master@{nodejs#30179}
    ofrobots committed Nov 5, 2015
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