Re: many lost ticks, clock drifts problems also with debian smp kernel?
On 01:22 Sat 10 Dec , Andrew Sharp wrote:
> On Fri, Dec 09, 2005 at 06:39:26AM -0500, mikepolniak wrote:
> > On 10:36 Fri 09 Dec , remi.delmas.3000@free.fr wrote:
> > > ---------------
> > >
> > > I have tried the pci=routeirq, acpi=off, noapic, nolapic, no_timer_check,
> > > no_tsc... bootparams without any real succes, my system clock keeps on drifting
> > > away faster and faster after the system has been up for some time.
> > >
> > > My question to the list is :
> > >
> > > Are the debian amd64-k8-smp kernels also subject to this problem?
> > >
> > This is a kernel problem with SMP having unsynced TSC's running at
> > different freqs, supposedly fixed in kernel 2.6.14. Before 2.6.14 i
> > needed to boot with pci=noacpi and clock=pmtmr to solve the 'lost
> > 'ticks'.
> >
> > A Debian kernel won't change anything. assuming you have a similar config
> > (e.g. HPET_TIMER=y PM_TIMER=y). You may want to post this on the LKML.
>
> This must be specific to some chipsets as I do not have this problem on
> my SMP system running Debian kernel 2.6.12-whatever.
This shows up when running dual cpu's under heavy load (compiling,
encoding etc) for an extended time.
Reply to: