The failure in ci/iol-x86_64-unit-testing on this patch seems to be unrelated to the patch.
> -----Original Message----- > From: Kathleen Capella <kathleen.cape...@arm.com> > Sent: Friday, February 4, 2022 6:26 PM > Cc: dev@dpdk.org; nd <n...@arm.com>; Dharmik Thakkar > <dharmik.thak...@arm.com>; Honnappa Nagarahalli > <honnappa.nagaraha...@arm.com>; Kathleen Capella > <kathleen.cape...@arm.com> > Subject: [PATCH 0/2] Add logic to IAVF to count continuous DD bits for Arm > > This patchset introduces a fix for Arm platforms to the IAVF driver that was > added to the i40e driver in a previous patchset [1]. > > The driver determines which descriptors in the HW ring reference packets > that are ready to be received by counting those descriptors whose DD bit is > set to 1. On Arm, the reading of descriptors can be reordered. The CPU may > be reading descriptors as the NIC is updating them. Tt is possbile that the DD > bit for a descriptor earlier in the queue is read as not set while the DD bit > for > a descriptor later in the queue is read as set. This patchset ensures only > contiguous DD bits set to 1 are counted. > > The first patch in this series adds this logic to the bulk Rx path. > The second patch adds this same logic to the function which reads flexible Rx > descriptors. > > No performance drop was observed when running l3fwd on N1SDP with a > single core. > > [1] > https://patches.dpdk.org/project/dpdk/patch/20210706065404.25137-2- > joyce.k...@arm.com/ > > Kathleen Capella (2): > net/iavf: count continuous DD bits for Arm > net/iavf: count continuous DD bits for Arm in flex Rx > > drivers/net/iavf/iavf_rxtx.c | 52 ++++++++++++++++++++++++++++++------ > 1 file changed, 44 insertions(+), 8 deletions(-) > > -- > 2.17.1
