On Fri, Aug 29, 2014 at 07:58:26AM +0200, Niels Dettenbach (Syndicat IT&Internet) wrote: > On 29. August 2014 05:32:34 MESZ, Mayuresh <[email protected]> wrote: > >The CPU column shows only 2 CPUs. This is actually a quad core > >processor. > > hmmm, > > as far as i can read there is no anomaly. > > i read there: > > VCPU: 0-3 (4 cores) > CPU: any CPU (could run on each core) - this is usual as long as you did > not pin any cpu to dom0 or domU's explicitely.
Yes, but "any CPU" is limited to those listed in CPU column. See http://wiki.xen.org/wiki/Tuning_Xen_for_Performance#Dom0_vCPUs for example. Here CPU 0,1,2,3 appear. In my output only 0 and 3 do. Further, I have CPU bound load test scripts. If I launch 2 of them simultaneously, they get 50% CPU (not 100% which I get when I start without xen) and take real time which is double the cpu time to finish. Mayuresh.
