Messages in this thread | | | Date | Sun, 22 Jun 2008 09:35:41 +0200 | From | Michael Kerrisk <> | Subject | nanosleep() uses CLOCK_MONOTONIC, should be CLOCK_REALTIME? |
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Thomas,
(I gues you are the right target for this?)
The POSIX.1 specification of nanosleep() says:
But, except for the case of being interrupted by a signal, the suspension time shall not be less than the time specified by rqtp, as measured by the system clock CLOCK_REALTIME.
However, reading kernel/hrtimer.c:sys_nanosleep(), it appears that CLOCK_MONOTONIC is used.
return hrtimer_nanosleep(&tu, rmtp, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
Is there a reason to use CLOCK_MONOTONIC, instead of CLOCK_REALTIME? Is it intentional? If yes, then I should document this in the man-pages. If not, then it should be fixed.
Cheers,
Michael
-- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ man-pages onlne: http://www.kernel.org/doc/man-pages/online_pages.html Found a bug? http://www.kernel.org/doc/man-pages/reporting_bugs.html
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