Question

I m 试图使用--prof 选项,编号:js。因此,我收到以下报告:

 [Shared libraries]:
   ticks  total  nonlib   name
  20736   94.8%    0.0%  b78a5000-b78a6000
    574    2.6%    0.0%  /usr/lib/libv8.so.3.4.14.21
    117    0.5%    0.0%  /usr/bin/node
     62    0.3%    0.0%  /lib/i386-linux-gnu/i686/cmov/libc-2.13.so
      1    0.0%    0.0%  /lib/i386-linux-gnu/ld-2.13.so

 [JavaScript]:
   ticks  total  nonlib   name
      3    0.0%    0.8%  Stub: StringAddStub
      3    0.0%    0.8%  Builtin: A builtin from the snapshot {1}

 ...

   ticks parent  name
  20736   94.8%  b78a5000-b78a6000

    574    2.6%  /usr/lib/libv8.so.3.4.14.21
     94   16.4%    Function: ~QueryCommand.toBinary /storage/hoc/nodejs/lib/mongodb/commands/query_command.js:37
     94  100.0%      Function: ~Connection.send /storage/hoc/nodejs/lib/mongodb/connection.js:353
     94  100.0%        Function: ~Db.executeCommand /storage/hoc/nodejs/lib/mongodb/db.js:629

 ...

The What is the b78a5000-b78a6000? 每一行的数字有所不同。

What do columns total, nonlib, parent mean? I can t find docs on it.

Answer 1

我猜想这个问题现已过时。我也有兴趣了解我的申请,但已不再有<条码>---prof的开关(似乎可以找到任何渠道的粗略信息)。

Look for dtrace and flamegraph if you use Unix (such as Solaris). Very detailed profiling. Unfortunately, I cannot use it because I run Linux (Ubuntu) and the original dtrace is not properly ported yet.

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