> > -----Original Message----- > > From: Honnappa Nagarahalli <honnappa.nagaraha...@arm.com> > > Sent: Monday, September 28, 2020 2:03 PM > > To: dev@dpdk.org; Honnappa Nagarahalli > <honnappa.nagaraha...@arm.com>; > > Phil Yang <phil.y...@arm.com>; jgraj...@cisco.com; > > ferruh.yi...@intel.com > > Cc: nd <n...@arm.com>; sta...@dpdk.org > > Subject: [PATCH v2 1/8] net/memif: do not update local copy of tail in > > tx function > > > > In the case of S2M queues, the receiver synchronizes with the sender (i.e. > > informs of the packets it has received) using ring->tail. > > Hence, the sender does not need to update last_tail. > > > > In the case of M2S queues, the receiver uses last_tail to keep track > > of the descriptors it has received. The sender is not required to update the > last_tail. > > Updating the last_tail makes it a shared variable between the > > transmitter and receiver affecting the performance.
Hi Honnappa, The patch series is looking good. Reviewed-by: Jakub Grajciar <jgraj...@cisco.com>
