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Line 28: − − Time spent in this routine is about 0.1 seconds on dump.
no edit summary
Written here are performance issues found
Written here are performance issues found.
Timing stats of live migration of a small container with 11 tasks is
* Total time ~3.5 seconds
* Frozen time ~3.0 seconds
** Pre-dump stages ~0.5 seconds each
** Restore time ~1.9 seconds
** Images transfer time ~0.3 seconds
Below is the list of issues found
== Dump ==
== Dump ==
== <code>parse_smaps</code> ==
== <code>parse_smaps</code> ==
This guy exploits /proc heavily. For a container with 11 tasks the syscall stats look like
Time spent in this routine is about 0.1 seconds on dump. This one exploits /proc heavily. For a container with 11 tasks the syscall stats look like
834 read
834 read
11 openat(AT_FDCWD, "/proc/$pid/map_files", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4
11 openat(AT_FDCWD, "/proc/$pid/map_files", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4
== Restore ==
== Restore ==