Re: [Xen-devel] Test results on Unisys ES7000 64x 256gb using unstablec/s 16693 on 3.2.0 Release Candidate

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 30/1/08 16:20, "Bill Burns" <bburns@xxxxxxxxxx> wrote:

> Until we get to scrubing free ram:
> 
> (XEN) Initrd len 0x894600, start at 0xffffffff80702000
> (XEN) Scrubbing Free RAM: ---0: 80000000 498c0b61 -2
> (XEN) .done.

That error factor (0x80000000) is as bad as it possibly can be. This means
that local_stime is running at least one second ahead of master_stime.
Probably the platform timer (which is used to compute master_stime) has gone
mad. In this case of course the platform timer is the ACPI PM timer.

I suggest instrumenting read_pmtimer_count() to see what value is getting
returned from there, to ensure it is monotonically increasing at about the
right rate. And also that it *is* actually getting invoked!

 -- Keir



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