Hi Michael,
At https://www.linux-kvm.org/page/NetworkingTodo, there is an entry for
network latency saying:
---
reduce networking latency:
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
Contact: MST
---
I am trying to make some contributions to improving netperf TCP_RR.
Could you please share more ideas or plans or implemental details to
make it happen?
Thanks,
Like Xu