[PATCH v2] net/ice: add NEON-optimised Rx/Tx vector paths

[Jay Wang]

Hi Bruce,

> Unfortunately, I've had to back this patch out again as it has caused errors in the CI over the weekend e.g. [1]. No errors were reported with the patch before I merged it, but I see now that not all tests were successfully run on it. Can you please take a look at the CI errors reported and submit a new version of this patch.

Thanks for reporting the issue!
I didn't realise that some of the intrinsics, such as vzip1q/vzip2q, are only supported on AArch64. This explains the compilation errors we're seeing on AArch32 when cross-building DPDK for the AArch32 unit tests.
I'll address this in the next revision by using vzip intrinsics to ensure compatibility across both AArch64 and AArch32.

Best Regards,
Jay Wang

-----Original Message-----
From: Bruce Richardson <bruce.richardson at intel.com> 
Sent: Tuesday, April 7, 2026 11:47 AM
To: Jay Wang <Jay.Wang2 at arm.com>
Cc: thomas at monjalon.net; Anatoly Burakov <anatoly.burakov at intel.com>; dev at dpdk.org; nd <nd at arm.com>
Subject: Re: [PATCH v2] net/ice: add NEON-optimised Rx/Tx vector paths

On Fri, Apr 03, 2026 at 03:33:35PM +0100, Bruce Richardson wrote:
> On Tue, Mar 24, 2026 at 04:25:24PM +0000, Jay Wang wrote:
> > This patch adds the NEON-optimised Rx and Tx paths to the ice driver.
> > 
> > Tested on Ampere One platform with Intel E810-C NIC and 100G connection.
> > Tested with a single core and testpmd io forwarding mode. Observed 
> > ~30% performance boost in the above test compared to the default 
> > scalar path.
> > 
> > Signed-off-by: Jay Wang <jay.wang2 at arm.com>
> > ---
> >  .mailmap                                  |   1 +
> >  drivers/net/intel/ice/ice_ethdev.h        |   3 +
> >  drivers/net/intel/ice/ice_rxtx.c          |  53 +-
> >  drivers/net/intel/ice/ice_rxtx.h          |   6 +
> >  drivers/net/intel/ice/ice_rxtx_vec_neon.c | 761 ++++++++++++++++++++++
> >  drivers/net/intel/ice/meson.build         |   2 +
> >  6 files changed, 824 insertions(+), 2 deletions(-)  create mode 
> > 100644 drivers/net/intel/ice/ice_rxtx_vec_neon.c
> > 
> Acked-by: Bruce Richardson <bruce.richardson at intel.com>
> 
> Applied to dpdk-next-net-intel
> 
Unfortunately, I've had to back this patch out again as it has caused errors in the CI over the weekend e.g. [1]. No errors were reported with the patch before I merged it, but I see now that not all tests were successfully run on it. Can you please take a look at the CI errors reported and submit a new version of this patch.

Thanks,
/Bruce


[1] https://lab.dpdk.org/results/dashboard/testruns/logs/1985291/