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[Xen-ia64-devel] SMP and VCPU migration.

from [Tristan Gingold] [Permanent Link][Original]
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-ia64-devel] SMP and VCPU migration.
From: Tristan Gingold <Tristan.Gingold@xxxxxxxx>
Date: Mon, 17 Oct 2005 17:20:25 +0200
Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
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Hi,

I am working on SMP for xen-ia64.  The first step was to be able to use all 
the cpus but without considering VCPUs migration ie VCPU must be pinned to 
one CPU.

Is it the same policy on x86 ?

The migration cost is rather high on ia64 and may require a lot of inter-CPU 
traffic for coherency (TLB and cache management at least).  What about x86 ?
How is the wbinvd instruction paravirualized/virtualized ?

Thank you for your comments.
Tristan.


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