Profiling System Calls

• The strace -c flag counts calls and reports time
• The results typically follow a Pareto distribution

$ strace -c find . -name test
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 66.06    0.367503         584       629           getdents64
 26.31    0.146389          80      1826           lstat64
  2.27    0.012621          40       313           fcntl64
  1.83    0.010168          31       326        10 open
  1.78    0.009894          16       625           chdir
  1.23    0.006846          22       316           fstat64
[...]

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 Last change: Tuesday, August 22, 2006 10:37 pm
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