Re: [Xen-devel] RE: [Xen-users] Xen in a 32 way system

[Ryan Harper <ryanh@xxxxxxxxxx>]

* Puthiyaparambil, Aravindh <aravindh.puthiyaparambil@xxxxxxxxxx> [2006-05-31 
09:00]:
> What kind of 32-way system is this? I have been able to run Xen 3.0.2 on
> a 64-way Unisys ES7000 without any issues. I am cross-posting on the
> xen-devel list in case it is an IBM machine. Could you please send more
> serial console output? 
> 
>  
> 
> Thanks,
> 
> Aravindh
> 
>  
> 
> ________________________________
> 
> From: Pablo Montesinos [mailto:pablomontesinos@xxxxxxxxx] 
> Sent: Tuesday, May 30, 2006 5:06 PM
> To: Uros Trebec; xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] Xen in a 32 way system
> 
>  
> 
> Actually, there is some skew in all the processors.
> Pablo
> 
> On 5/30/06, Uros Trebec <uros.trebec@xxxxxxxxx > wrote:
> 
> On 5/30/06, Pablo Montesinos < pablomontesinos@xxxxxxxxx
> <mailto:pablomontesinos@xxxxxxxxx> > wrote:
> > yes
> >
> > (XEN) CPU#31 had -112556 usecs TSC skew, fixed it up

AFAIK, this is harmless.  Our x460 32-way spits out the same
information.  This is part of the TSC synchronization code in Xen during
boot.

(XEN) checking TSC synchronization across 32 CPUs:
(XEN) CPU#0 had -125003 usecs TSC skew, fixed it up.
(XEN) CPU#1 had -125001 usecs TSC skew, fixed it up.
(XEN) CPU#2 had -124997 usecs TSC skew, fixed it up.
(XEN) CPU#3 had -125001 usecs TSC skew, fixed it up.
(XEN) CPU#4 had -125000 usecs TSC skew, fixed it up.
(XEN) CPU#5 had -125000 usecs TSC skew, fixed it up.
(XEN) CPU#6 had -124992 usecs TSC skew, fixed it up.
(XEN) CPU#7 had -124976 usecs TSC skew, fixed it up.
(XEN) CPU#8 had -125022 usecs TSC skew, fixed it up.
(XEN) CPU#9 had -125022 usecs TSC skew, fixed it up.
(XEN) CPU#10 had -125022 usecs TSC skew, fixed it up.
(XEN) CPU#11 had -125022 usecs TSC skew, fixed it up.
(XEN) CPU#12 had -125020 usecs TSC skew, fixed it up.
(XEN) CPU#13 had -125020 usecs TSC skew, fixed it up.
(XEN) CPU#14 had -125019 usecs TSC skew, fixed it up.
(XEN) CPU#15 had -125019 usecs TSC skew, fixed it up.
(XEN) CPU#16 had -124498 usecs TSC skew, fixed it up.
(XEN) CPU#17 had -124498 usecs TSC skew, fixed it up.
(XEN) CPU#18 had -124498 usecs TSC skew, fixed it up.
(XEN) CPU#19 had -124498 usecs TSC skew, fixed it up.
(XEN) CPU#20 had -124498 usecs TSC skew, fixed it up.
(XEN) CPU#21 had -124498 usecs TSC skew, fixed it up.
(XEN) CPU#22 had -124496 usecs TSC skew, fixed it up.
(XEN) CPU#23 had -124496 usecs TSC skew, fixed it up.
(XEN) CPU#24 had 374521 usecs TSC skew, fixed it up.
(XEN) CPU#25 had 374520 usecs TSC skew, fixed it up.
(XEN) CPU#26 had 374511 usecs TSC skew, fixed it up.
(XEN) CPU#27 had 374511 usecs TSC skew, fixed it up.
(XEN) CPU#28 had 374511 usecs TSC skew, fixed it up.
(XEN) CPU#29 had 374511 usecs TSC skew, fixed it up.
(XEN) CPU#30 had 374521 usecs TSC skew, fixed it up.
(XEN) CPU#31 had 374520 usecs TSC skew, fixed it up.

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253
ryanh@xxxxxxxxxx

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