ClusterMonkey - Comment on article

Name: Galen Arnold

Comment:
strace -c can do some great profiling work for you as well, helping to answer questions like: is my program spending more time reading or writing?

example with unix find command:

bash-3.1$ strace -c find . -print > /dev/null
Process 17304 detached
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
79.96 0.075300 28 2654 getdents64
9.73 0.009163 7 1301 lstat64
4.51 0.004246 2 2599 fchdir
3.80 0.003580 1 3917 8 open
1.15 0.001082 0 3909 close
0.53 0.000497 0 1300 fcntl64
0.29 0.000275 0 1303 3 stat64
0.03 0.000031 0 1311 fstat64
0.00 0.000000 0 9 read
0.00 0.000000 0 211 write
0.00 0.000000 0 1 execve
0.00 0.000000 0 1 time
0.00 0.000000 0 2 1 access
0.00 0.000000 0 3 brk
0.00 0.000000 0 3 2 ioctl
0.00 0.000000 0 6 munmap
0.00 0.000000 0 1 uname
0.00 0.000000 0 3 mprotect
0.00 0.000000 0 20 mmap2
0.00 0.000000 0 1 set_thread_area
------ ----------- ----------- --------- --------- ----------------
100.00 0.094174 18555 14 total
bash-3.1$

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