Re: timekeeping regression?

[Greg Troxel <gdt%lexort.com@localhost>]

"Greg A. Woods" <woods%planix.ca@localhost> writes:

> I cannot imagine why having only one vCPU in dom0 helps.  It makes no
> sense given what (little) I know about how the Xen kernel timecounters
> and dom0 timecounters should interact.

I don't claim to understand it, but it did help, for me and my hardware.

cpu0: highest basic info 0000000d
  cpu0: highest extended info 80000008
  cpu0: "Pentium(R) Dual-Core  CPU      E5700  @ 3.00GHz"
  cpu0: Intel Xeon 31xx, 33xx, 52xx, 54xx, Core 2 Quad 8xxx and 9xxx (686-class)
  cpu0: family 0x6 model 0x17 stepping 0xa (id 0x1067a)
  cpu0: features 0x1fc9cbf5<FPU,DE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MCA,CMOV,PAT>
  cpu0: features 0x1fc9cbf5<CLFSH,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT>
  cpu0: features1 0x4002201<SSE3,SSSE3,CX16,XSAVE>
  cpu0: features2 0x20100800<SYSCALL/SYSRET,XD,EM64T>
  cpu0: features3 0x1<LAHF>

Yes, that's old.