[Xen-devel] VCPU migration overhead conpensation ?

[Sisu Xi <xisisu@xxxxxxxxx>]

Hi, all:

I am studying the credit2 scheduler and found it would compensate VCPU migration with 50 microseconds.

/* How much to "compensate" a vcpu for L2 migration */

#define CSCHED_MIGRATE_COMPENSATION MICROSECS(50)

Why 50us? Is this number based on some experiments? If so, could any one kindly indicate how to perform the overhead measurement?

Thanks very much!

Sisu

--
Sisu Xi, PhD Candidate

http://www.cse.wustl.edu/~xis/
Department of Computer Science and Engineering
Campus Box 1045
Washington University in St. Louis
One Brookings Drive
St. Louis, MO 63130

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