On Thu, Mar 06, 2008 at 08:00:00PM -0700, John J. Foster wrote: > On Wed, Mar 05, 2008 at 08:25:59PM -0700, John J. Foster wrote: > > Hi all - it's been awhile > > > > This past week I've set up Gentoo running in a VM built by > > http://www.easyvmx.com/ under a XP host. Installation and configuration > > went fine. I normally leave the VM running when I walk away from the > > machine, but when I return, time is way off. Shutting down Gentoo & the > > VM & rebooting solvles the problem, as vmplayer must initially get the > > date and time from the host, but it sure doesn't keep it right after > > that. I tried openntpd, but it kept setting the time further and further > > off. I live in Fort Collins, Co and my locatime is set correctly > > (America/Denver). This is my 1st time playing with VM's. Is this common? > > Is there any way around it? I'm not really sure why openntpd didn't > > work. > > > > Any and all help appreciated. > > > I need to explain this a little further, me thinks. My Gentoo VM is > losing right around 20 seconds every minute! This is not a problem that > ntp in any of its incarnations is designed to solve. A couple other > thing I have tried are > > clock=pit noapic > > appended to the kernel command line. I tried these together and > separately with no luck. Right now I'm trying another suggestion I > found, which is to change the kernel frequency timer from 1000Hz to > 250Hz. I'm recompiling now and will let you know. > Switching to 250Hz looks like it has solved the problem. No time lost for a little over an hour now, and ntp is syncing properly, I think. But my reading of the help on this setting led me to believe that 1000Hz was right for a desktop system.
Can any explain what this setting actually does, and why it works now?
***** from make menuconfig help *****
CONFIG_HZ_1000:
1000 Hz is the preferred choice for desktop systems and other
systems requiring fast interactive responses to events.
Symbol: HZ_1000 [=n]
Prompt: 1000 HZ
Defined at kernel/Kconfig.hz:42
Depends on: <choice>
Location:
-> Processor type and features
-> Timer frequency (<choice> [=y])
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