1. 03 5月, 2009 1 次提交
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      perf_counter: some simple userspace profiling · de9ac07b
      Peter Zijlstra 提交于
      # perf-record make -j4 kernel/
       # perf-report | tail -15
      
        0.39              cc1 [kernel] lock_acquired
        0.42              cc1 [kernel] lock_acquire
        0.51              cc1 [ user ] /lib64/libc-2.8.90.so: _int_free
        0.51               as [kernel] clear_page_c
        0.53              cc1 [ user ] /lib64/libc-2.8.90.so: memcpy
        0.56              cc1 [ user ] /lib64/libc-2.8.90.so: _IO_vfprintf
        0.63              cc1 [kernel] lock_release
        0.67              cc1 [ user ] /lib64/libc-2.8.90.so: strlen
        0.68              cc1 [kernel] debug_smp_processor_id
        1.38              cc1 [ user ] /lib64/libc-2.8.90.so: _int_malloc
        1.55              cc1 [ user ] /lib64/libc-2.8.90.so: memset
        1.77              cc1 [kernel] __lock_acquire
        1.88              cc1 [kernel] clear_page_c
        3.61               as [ user ] /usr/bin/as: <unknown>
       59.16              cc1 [ user ] /usr/libexec/gcc/x86_64-redhat-linux/4.3.2/cc1: <unknown>
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
      LKML-Reference: <20090408130409.220518450@chello.nl>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      de9ac07b