List of xm commands
http://www.centos.org/docs/5/html/Virtualization-en-US/virt-task-xm-managing.html

A discussion on VCPUs and CPU affinity
http://markmail.org/message/mlbmog4xdvqfcki3?q=how+to+get+info+about+the+cpus+for+using+xm+vcpu-pin+command&page=1&refer=63bw5tbz6mhwzxzx

Using vcpu-pin command
http://book.xen.prgmr.com/mediawiki/index.php/Scheduling

started experiments.
Review of reports.