Performance research
Jump to navigation
Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
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.