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    perf script: Move filter_cpu() earlier · 9300041c
    Adrian Hunter 提交于
    Generally, it should be more efficient if filter_cpu() comes before
    machine__resolve() because filter_cpu() is much less code than
    machine__resolve().
    
    Example:
    
     $ perf record --sample-cpu -- make -C tools/perf >/dev/null
    
    Before:
    
     $ perf stat -- perf script -C 0 >/dev/null
    
      Performance counter stats for 'perf script -C 0':
    
                116.94 msec task-clock                #    0.992 CPUs utilized
                     2      context-switches          #   17.103 /sec
                     0      cpu-migrations            #    0.000 /sec
                 8,187      page-faults               #   70.011 K/sec
           478,351,812      cycles                    #    4.091 GHz
           564,785,464      instructions              #    1.18  insn per cycle
           114,341,105      branches                  #  977.789 M/sec
             2,615,495      branch-misses             #    2.29% of all branches
    
           0.117840576 seconds time elapsed
    
           0.085040000 seconds user
           0.032396000 seconds sys
    
    After:
    
     $ perf stat -- perf script -C 0 >/dev/null
    
      Performance counter stats for 'perf script -C 0':
    
                107.45 msec task-clock                #    0.992 CPUs utilized
                     3      context-switches          #   27.919 /sec
                     0      cpu-migrations            #    0.000 /sec
                 7,964      page-faults               #   74.117 K/sec
           438,417,260      cycles                    #    4.080 GHz
           522,571,855      instructions              #    1.19  insn per cycle
           105,187,488      branches                  #  978.921 M/sec
             2,356,261      branch-misses             #    2.24% of all branches
    
           0.108282546 seconds time elapsed
    
           0.095935000 seconds user
           0.011991000 seconds sys
    Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Kan Liang <kan.liang@linux.intel.com>
    Cc: Leo Yan <leo.yan@linaro.org>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Link: http://lore.kernel.org/lkml/20210621150514.32159-2-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
    9300041c
builtin-script.c 106.6 KB