[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Xen 3.2.2 - Timer ISR/0: Time went backwards
What sort of hardware? -- Keir On 4/8/08 19:51, "Christopher S. Aker" <caker@xxxxxxxxxxxx> wrote: > Hardware: > Xen: 3.2.1-rc2 64bit > dom0: 2.6.18.8 at changeset 622, PAE > > # xm dmesg | grep -e sync -e timer > (XEN) checking TSC synchronization across 8 CPUs: passed. > (XEN) Platform timer overflows in 234 jiffies. > (XEN) Platform timer is 3.579MHz ACPI PM Timer > (XEN) Machine check exception polling timer started. > > Spools one of these to console every few seconds: > > Timer ISR/0: Time went backwards: delta=-4270576170971 > delta_cpu=254829029 shadow=2037844042151244163 off=261710497 > processed=2037848312989081849 cpu_processed=2037844042158081849 > 0: 2037844042158081849 > 1: 2037828468354081849 > 2: 2037848312989081849 > 3: 2037837726866081849 > 4: 2037842059197081849 > 5: 2037840075526081849 > 6: 2037845844663081849 > 7: 2037841593777081849 > > A few t's into Xen's console: > > (XEN) *** Serial input -> Xen (type 'CTRL-a' three times to switch input > to DOM0) > (XEN) Min = 2037829427350793281 ; Max = 2037848310626701146 ; Diff = > 18883275907865 (18883275907 microseconds) > (XEN) Min = 2037829428349256182 ; Max = 2037848311625163843 ; Diff = > 18883275907661 (18883275907 microseconds) > (XEN) Min = 2037829428565188930 ; Max = 2037848311841096807 ; Diff = > 18883275907877 (18883275907 microseconds) > > This particular box does this with 3.2.0 - 3.2.2-rc2. I have another > box doing the same thing, except the delta is more sane (0 - 2 > microseconds), however eventually dom0 freezes. > > -Chris > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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