Difference between revisions of "Time namespace"
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| Line 8: | Line 8: | ||
=TODO= | =TODO= | ||
==Required in RFC== | ==Required in RFC== | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
* btime in /proc/stat (used by pstools) | * btime in /proc/stat (used by pstools) | ||
* starttime in /proc/pid/stat | * starttime in /proc/pid/stat | ||
| Line 27: | Line 22: | ||
** mq_timedsend()/mq_timedreceive() | ** mq_timedsend()/mq_timedreceive() | ||
** semtimedop() | ** semtimedop() | ||
| + | ** timerfd | ||
| + | ** timer_create() | ||
| + | ** COARSE times | ||
| + | ** clock_nanosleep() | ||
* Adjtime (too complicated for PoC) | * Adjtime (too complicated for PoC) | ||
* Cpu time for thread/pid/pgid (times()) | * Cpu time for thread/pid/pgid (times()) | ||
Revision as of 00:22, 14 August 2018
Two things (for now) we want to solve with this:
- Shift timer's offsets
- Make start-time remain "unchanged" after C/R
- Continuous flow of monotonic time (CLOCK_MONOTONIC).
What about other kinds of counters like perf events and trace events?
TODO
Required in RFC
- btime in /proc/stat (used by pstools)
- starttime in /proc/pid/stat
- selftests to test all we've added
- TIME_NS iffdefery everywhere
Maybe later
- arm64/arm32/s390/power64 - add archs vvar support (nit: big/little-endianess for timespec::nsec)
- REALTIME-related:
- REALTIME offsets
- vfs modification/creation time should work
- utime()/utimes()/futimesat() (with times == NULL)
- utimensat()/futimens() - with UTIME_NOW
- mq_timedsend()/mq_timedreceive()
- semtimedop()
- timerfd
- timer_create()
- COARSE times
- clock_nanosleep()
- Adjtime (too complicated for PoC)
- Cpu time for thread/pid/pgid (times())
- /proc/stat ticks? (top uses them e.g.)
- pid creation time (probably different unrelated API)
- clock_tai - if we care about isolation from host's time