On Mon, Dec 01, 2014 at 17:33, MichaÅ Koc wrote: >> Hi All, >> >> I've got a OpenBSD installation on Microsoft Hyper-V, and there is a >> strange issue related to time. >> Actually the clock seems to be running fine, but all of the sleep >> operations expire 2 times too fast. >> cpu0 at mainbus0: apid 0 (boot processor) >> mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges >> cpu0: apic clock running at 105MHz > The clock that determines how long a second is the apic clock, which > we attempt to measure at boot time. However, sometimes the reading is > done wrong which usually results in a multple of the actual frequency. > Actually, it usually results in clocks running at 1/2 or 1/3 speed, > not double speed. But it's the same problem. Your apic clock is > apparently really running at 200MHz. > > There was a fix made to the code quite some time ago which resolved > the issue on real hardware. I haven't seen it since. But Hyper-V is > obviously different. > > There is no fix or change you can make to change the frequency once > determined, but maybe if Hyper-V has some setting for "optimized clock > ticks" or whatever, you can fiddle with it. > > > Hi Ted,
thank You for a quick response. Unfortunately I'm not in position to do any changes in the settings. But I've set this value manually in lapic_gettick, and the machine seems to be running fine for now. I know that's not a best possible solution :) Best regards -- MichaÅ Koc
