On Thursday 27 October 2005 21:42, Langsdorf, Mark wrote:
On Thursday 27 October 2005 19:42, Langsdorf, Mark wrote:
Unofficially, clock=pmtmr should at least reduce the amount of lost ticks.
I doubt it will help on 64bit kernels, which don't have this option (ok placebos are sometimes known to help on computers too clock= only exists on 32bit.
I'll defer to you, Andi, but 2.6.13.4 definitely has PM timer support for AMD64. Is there really no way to force a particular time source on AMD64?
64bit doesn't have the modular timer drivers of 32bit. There is notsc and nohpet and nopmtimer to disable specific time sources. But TSC use on UP is somewhat hardcoded and it doesn't use the decision path of the SMP version, so far it would always use TSC. As a workaround for SUSE users it might work to manually install a SMP kernel though - during the installation unselect the kernel-default kernel and manually select kernel-smp in the package selection. Then notsc and the other options should work I think.
notsc might do the trick on 64bit though. However it will only work on multi processor systems. On uniprocessor there is currently no way to force another clock.
Okay. Would a patch to change this be accepted?
Probably yes -Andi