* The overhead of VCPu migration in xen
@ 2009-11-20 7:26 michaeli.zhi
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From: michaeli.zhi @ 2009-11-20 7:26 UTC (permalink / raw)
To: xen-devel
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Hi, everyone.
I did a little study on the code of credit scheduler of xen.
I am confused on overhear of the migration of VCPU .
As I learned, the course of VCPU migration is just to return a "reasonable" VCPU of other peer PCPU
to the PCPU which is busy on other VCPU, as well as some judgments before(eg., comparision of VCPU priority, affintiy).
In a word, it is just a pointer returned.
My question is where is the overhead,
or the overhead of executing those load_balance codes is expensive,
or will the migration of VCPU introducing the somekind of cache failure?
Best regards
2009-11-20
michaeli.zhi
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