Difference between revisions of "Performance research"
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(Created page with "Written here are performance issues found == <code>parse_smaps</code> == This guy exploits /proc heavily. For a container with 11 tasks the syscall stats look like 834 ...") |
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Revision as of 20:51, 30 January 2014
Written here are performance issues found
parse_smaps
This guy exploits /proc heavily. For a container with 11 tasks the syscall stats look like
834 read 1451 fstat 1462 close 1642 openat
while opens and stats happen on
193 openat(4, "map-symlink", O_RDONLY) = -1 ENOENT (No such file or directory)
1438 openat(4, "map-symlink", O_RDONLY) = 5
11 openat(AT_FDCWD, "/proc/$pid/map_files", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4
Time spent in this routine is about 0.1 seconds on dump.