The friend of my had the issue with time drifts on opteron. Here what he found
Quote: talking about old opteron issues ... First, I solved my clock problem. The issue was that the high precision timer (hpet) was not properly accessing the hardware clock, resulting in highly non-monotonous system time ... Loading rtc as module solved it apparently. End of quote > ok, first off, i'd like to say thanx for all the help and suggestions > that everybody's given me. it feels good to have a community ready and > willing to help :-D > > now, to the bad news -.- > > ok, i recompiled my kernel to the newest verision (patched it to > rc6-git7), and rebooted into it. > > i disabled lapic and my system hung at startup, happend on the new > kernel as well > > dma is enabled on my HD > > ok, with all of this said, the horrible news is that my clock is STILL > running fast even with all of this attempted -.-. > > now, i have a question, in dmesg and tail, what exactly kind of > unusual stuff am i searching for? > > sorry guys, it just doesn't seem to go away > > > > cheers, > > Matthew > > On 6/12/05, Marco Matthies <[EMAIL PROTECTED]> wrote: > > Resending as it didn't seem to have gotten through the first time: > > > > > Thanks Marco, noapic worked beautifully. now my clock is very much in > > > tune with what time should be like, however, now, my box will not > > > recieve a dhcp ip address whenever i use this option to boot my kernel. > > > any suggestions? > > > > To be honest I have no idea, as my previous suggestion already was an > > uneducated guess. That said, there is another closely related kernel > > option nolapic that you might want to try (just remember to always keep > > an extra entry in grub.conf for a kernel with working settings). By this > > I mean try both noapic and nolapic together. > > > > Maybe this is all fixed in a future kernel, so you might want to try > > Duncans advice and testdrive a new kernel. Turning on DMA on your hdd, > > as Andy suggested, will only help performance, maybe it will also clear > > out your problems - have you checked this? Use hdparm, for example > > "hdparm /dev/hda" to find out if dma is enabled. > > > > It might also be possible to find something looking at the output of: > > tail -n 100 /var/log/messages | less > > dmesg | less > > You might want to check them for anything unusual. > > > > One further note: if you're like me and get APIC and ACPI messed up all > > the time, you might want to check out (I love wikipedia!): > > http://en.wikipedia.org/wiki/Apic > > http://en.wikipedia.org/wiki/ACPI > > > > Good luck! > > > > Marco > > -- > > [email protected] mailing list > > > > > > -- > [email protected] mailing list -- Dmitri Pogosyan Department of Physics Associate Professor University of Alberta tel 1-780-492-2150 412 Avadh Bhatia Physics Labs fax 1-780-492-0714 Edmonton, AB, T6G 2J1, CANADA -- [email protected] mailing list
