[Xen-users] Dom0 CPU usage goes high if DomU is under heavy loading

[Tom Ting[丁郁庭] <tom_ting@xxxxxxxxxxx>]

Hi All

 

I’ve encounter following issue and need your advice.

 

Platform setting :

ARM64, 4 physical CPU, XEN-4.6

Dom0 :

- Network backend

- Running high wifi throughput (extremely high interrupt rate)

DomU :

- Media playback, 3D Graphic

- Video/GPU is using passthrough driver

- hooked to network via VIF

 

If Dom0 is running high network throughput and DomU is under idle state, Dom0 consumes about 140~150% observed from xentop.

Now we let DomU do some heavy workloads(ex: high-resolution-playback/3D graphic/consumes about 160%), Dom0 CPU will be affected and goes up to 190%.

I’ve tried to adjust parameters on credit-scheduler but improvement is limited.

Really appreciate for your adjustment or advice.

 

 

Thanks

Tom

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