This patch set replaces the two-way barriers with C11 one-way barriers for packed vring flags, when the frontend and backend are implemented in software.
By doing vhost-user + virtio-user case benchmarking, 9% performance gain in the RFC2544 test was measured on Thunderx2 platform.[1] [1]https://doc.dpdk.org/dts/test_plans/pvp_multi_paths_performance_test_plan.html PVP test with virtio 1.1 mergeable path v2: convert RFC to patch Joyce Kong (2): virtio: one way barrier for packed vring desc avail flags virtio: one way barrier for packed vring desc used flags drivers/net/virtio/virtio_rxtx.c | 38 ++++++++++++++++++------ drivers/net/virtio/virtio_user/virtio_user_dev.c | 10 +++++-- drivers/net/virtio/virtqueue.h | 7 ++++- lib/librte_vhost/vhost.h | 2 +- lib/librte_vhost/virtio_net.c | 16 +++++----- 5 files changed, 50 insertions(+), 23 deletions(-) -- 2.7.4
