Re: CLOCK_MONOTONIC / CLOCK_UPTIME is not really monotonic between threads
Maxim Sobolev <[email protected]>
| Newsgroups | gmane.os.freebsd.current,gmane.os.freebsd.devel.threading,gmane.os.freebsd.questions,gmane.os.freebsd.architechture |
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| Message-ID | <CAH7qZftxd=0spJTaAVv2RctXyQmV=cd7JL-xnYnaqfMhoeX7hg@mail.gmail.com> |
a. multiple cores. b. makes no difference c. yes, I believe so kern.timecounter.tsc_shift: 1 kern.timecounter.smp_tsc_adjust: 0 kern.timecounter.smp_tsc: 1 kern.timecounter.invariant_tsc: 1 machdep.tsc_freq: 2658118740 machdep.disable_tsc_calibration: 0 machdep.disable_tsc: 0 d. no, single socket Intel Q6700. I've also seen this problem on core i7-4770 running virtualbox 5.x. I have a hints that this also happens on our bigger production boxes, but I have no specifics yet. On Thu, Jun 2, 2016 at 10:05 PM, Adrian Chadd <[email protected]> wrote: > [snip] > > a) is it on one core, or multiple cores? > b) CLOCK_MONOTONIC_FAST? > c) is it on a system that /has/ invariant-TSC ? > d) is this a multi-socket system? > > > > -adrian > > _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[email protected]"