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

From: Eliezer Tamir
Date: Wed May 22 2013 - 05:35:34 EST

On 21/05/2013 21:15, Ben Hutchings wrote:
On Tue, 2013-05-21 at 15:29 +0300, Eliezer Tamir wrote:
Many of the questions you asked are covered in our RFC cover letter, but
I will touch them briefly

On 21/05/2013 15:06, Alex Rosenbaum wrote:
1. It seem this patch does not cover epoll/select and such IO muxing APIs?

We are thinking about how to implement epoll support as one of the next

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

I raised this issue back at Plumbers and I thought Jesse said poll() was
covered. It's likely to be a bit of a toy without that. Also, UDP?

The current patchset covers poll/select for UDP.
Adding poll/select for TCP should be simple, I will try to include it in the next version.

Epoll should see a gain from the above in the case where all the polled file descriptors are associated to the same device queue.
A fuller implementation, in the epoll itself would be needed to cover multiple queues/devices.

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