On 6/30/08, David Allen <[EMAIL PROTECTED]> wrote: > I've been seeing errors like the following appearing: > > Jun 30 03:13:57 ford kernel: calcru: runtime went backwards from 261 > usec to 258 usec for pid 516 (devd) [...] > Jun 30 03:13:57 ford kernel: calcru: runtime went backwards from 486 > usec to 481 usec for pid 0 (swapper) > > and narrowed down the cause to openntpd. > > Do these errors fall into the Mostly Harmless category?
It's probably just an annoyance, unless it is happening so often it causes other problems. The FreeBSD FAQ used to have a nice explanation of this, but it has been replaced by a discussion that simply assumes the problem is caused by the Intel SpeedStep implementation on your motherboard: http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/troubleshoot.html#Q5.24. But in general, this error can be caused by several things, including a device that is slow to respond to interrupts. One thing that often helps on SMP systems is to make sure your timecounter isn't using TSC: $ sysctl kern.timecounter kern.timecounter.tick: 1 kern.timecounter.choice: TSC(-100) HPET(900) ACPI-fast(1000) i8254(0) dummy(-1000000) kern.timecounter.hardware: ACPI-fast [...] - Bob _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"