Re: [PATCH v3 net-next 0/4] net: low latency Ethernet device polling

On 5/23/2013 2:06 PM, Eliezer Tamir wrote:

On 21/05/2013 16:15, Alex Rosenbaum wrote:

quoted

On 5/21/2013 3:29 PM, Eliezer Tamir wrote:

quoted

What benchmarks are you using to test poll/select/epoll?

for epoll/select latency tests we are using sockperf as performance
latency tool: https://code.google.com/p/sockperf/
It is a client-server based tool and it supported ping-pong, throughput,
and under-load test type.
For epoll, you will need to define a 'feedfile' ("-f filepathname")
which has a list of TCP and/or UDP socket and defined your IO mux type
("-F epoll").

Thank you!
This is very helpful.

With sockperf i can directly observe how poll/select/epoll are behaving.
I can see some improvement in all of them but clearly more work is needed here.

-Eliezer

I'm happy you got it working.

If you add '--timeout=0' to the sockperf epoll command line you can see non-blocking epoll application behavior and then you will get some improved latency over due to the application thread not sleeping.

This is not like a full blown LLS epoll solution but half way there.


Alex