Re: [Intel-wired-lan] [PATCH iwl-next v4 0/4] igb: Add support for AF_XDP zero-copy

On Thursday, 27 June 2024, 09:07:55 CEST, Kurt Kanzenbach wrote:

Hi Sriram,

On Fri Aug 04 2023, Sriram Yagnaraman wrote:

quoted

The first couple of patches adds helper funcctions to prepare for AF_XDP
zero-copy support which comes in the last couple of patches, one each
for Rx and TX paths.

As mentioned in v1 patchset [0], I don't have access to an actual IGB
device to provide correct performance numbers. I have used Intel 82576EB
emulator in QEMU [1] to test the changes to IGB driver.

I gave this patch series a try on a recent kernel and silicon
(i210). There was one issue in igb_xmit_zc(). But other than that it
worked very nicely.

Hi Kurt and Sriram,

I recently tried the patches on a 6.1 kernel. On two different devices i210 & 
i211 I couldn't see any packets being transmitted on the wire. Perhaps caused 
by the issue in igb_xmit_zc() you mentioned, Kurt? Can you share your findings, 
please?

RX seemed to work on first sight.

It seems like it hasn't been merged yet. Do you have any plans for
continuing to work on this?

I can offer to do testing and debugging on real hardware if this helps.

Thanks,
Benjamin