Need Optimization in CPU Intensive Scenarios

[hnes]

Is your feature request related to a problem? Please describe.

In CPU intensive scenarios, Netpoll performs a little worse than go native net:

CPU usage of RPC servers:

NetPoll:

Go Native Net:

netpoll-benchmark sources used to benchmark

The commit to cpu-intensive-fy the benchmark

Describe the solution you'd like

Maybe we need some optimizations for NetPoll when it is running in CPU-intensive scenarios?

Describe alternatives you've considered

No idea.

[joway]

@hnes
When you are using concurrent 1000 that means there are too many goroutines exist and everyone occupied P(processor) long time. That makes netpoll's poller cannot take the P timely.

But in real-time services, most of the time, it will not fill all CPUs(tanks to autoscaling or others) so the situation will not be so bad.

If you still want to use Netpoll in this scenario, you may adjust the poller event loop number.

[hnes]

@joway Thanks a lot.