> -----Original Message----- > From: Ruifeng Wang <[email protected]> > Sent: Wednesday, September 15, 2021 4:34 PM > To: [email protected] > Cc: Xing, Beilei <[email protected]>; Zhang, Qi Z <[email protected]>; > Richardson, Bruce <[email protected]>; [email protected]; > [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; Ruifeng > Wang <[email protected]> > Subject: [PATCH v2 0/2] i40e Rx descriptor loads ordering > > On Rx path, NIC fills Rx descriptor with data pertains to received packet. > > A single descriptor consists of multiple words. Word1 has the bit that > indicates > readiness of descriptor for software to use. So word1 should be loaded before > other words. > > On architectures with weaker memory ordering, barrier is needed to ensure > the ordering of loads. > > This patch set fixed the risk on both scalar path and aarch64 vector path. > > v2: > Updated commit message. Performance impact added. (Honnappa) > > Ruifeng Wang (2): > net/i40e: fix risk in Rx descriptor read in NEON vector path > net/i40e: fix risk in Rx descriptor read in scalar path > > drivers/net/i40e/i40e_rxtx.c | 12 ++++++++++++ > drivers/net/i40e/i40e_rxtx_vec_neon.c | 8 ++++++++ > 2 files changed, 20 insertions(+) > > -- > 2.25.1 Applied to dpdk-next-net-intel. Thanks Qi
