Hi George:
We have observed abnormal CPU utilization behavior on our HVMS.
There are two same physical hosts, with exactly same Xen and dom0 kernel installed,
The host owns 24G memory and 16 CPUS.
On each of the host, a HVM is running.
(WIN2008, 16G MEM, 8VCPUS, derive from same base VHD image)
That is we have same HVMA, HVMB on different host.
Some days after, HVMA behaves quite abnormal, every time I start an application inside VM,
its CPU utilization grows and drops very quickly(up to 80%), so it feels that the system is very lag.
While, HVMB works fine.
So it makes me to guess that processes on HVMA consume more CPU than HVMB.
Later, I run superPI tests on both HVMS, calculate 320million PI.
Here is the result.
HVMA HVMB
End of initialization. Time: 2min, 54 Sec. 12sec
1st time completion: 5min, 05 Sec 49 sec
2nd time completion: 6min, 14 Sec 1min, 32sec
3rd time completion: 7min, 17Sec 2min 14 sec
4th time completion : 8min 22, sec 2min 57
5th time completion : 9min , 48 sec 3min 40
……. …… ……
24th time completion 29min 52 16min 59
From the data above, the initialization time of superPI for HVMA is much slower than HVMB.
And every calculation of PI for HVMA is a bit slower than HVMB.
How could this happen, could you enlighten me some?
Many thanks.
