Hi All,
I found this interesting project from KVM TODO website:
allow handling short packets from softirq or VCPU context
Plan:
We are going through the scheduler 3 times
(could be up to 5 if softirqd is involved)
Consider RX: host irq -> io thread -> VCPU thread ->
guest irq -> guest thread.
This adds a lot of latency.
We can cut it by some 1.5x if we do a bit of work
either in the VCPU or softirq context.
Testing: netperf TCP RR - should be improved drastically
netperf TCP STREAM guest to host - no regression
Developer: MST
I am also tuning the vCPU scheduling of KVM. If someone would like to
say some details about the work either in the vCPU or softirq context,
I will be very appreciated. BTW, how to get the evaluation results
that the shortcut can improve the performance by up to 1.5X?
Thanks a lot!
Regards,
Cong
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