> > -----Original Message----- > > From: dev <dev-boun...@dpdk.org> On Behalf Of Phil Yang > > Sent: Monday, August 26, 2019 7:00 PM > > To: jgraj...@cisco.com; dev@dpdk.org > > Cc: tho...@monjalon.net; jer...@marvell.com; Honnappa Nagarahalli > > <honnappa.nagaraha...@arm.com>; damar...@cisco.com; nd > <n...@arm.com> > > Subject: [dpdk-dev] [PATCH v1] net/memif: optimized with one-way > > barrier > > > > Using 'rte_mb' to synchronize the shared ring head/tail between > > producer and consumer will stall the pipeline and damage performance > > on the weak memory model platforms, such like aarch64. Meanwhile > > update the shared ring head and tail are observable and ordered between > CPUs on IA. > > > > Optimized this full barrier with the one-way barrier can improve the > > throughput. On aarch64 n1sdp server this patch make testpmd throughput > > boost 2.1%. On Intel E5-2640, testpmd got 3.98% performance gain. > > > > Signed-off-by: Phil Yang <phil.y...@arm.com> > > Reviewed-by: Gavin Hu <gavin...@arm.com>
The patch is looking good, but 'MEMIF_VERSION_MAJOR' in memif.h needs to be set to 3 as ring pointers are no longer volatile.
