On 12/19/18 9:21 AM, Maxime Coquelin wrote:
This series adds missing read barriers after reading avail index for split ring and desc flags for packed ring. Also, it turns out that some descriptors prefetching are either badly placed, or useless, last part of the series fixes that. With the series applied, I get between 0 and 4% gain depending on the benchmark (testpmd txonly/rxonly/io). Thanks to Jason for reporting the missing read barriers. Changes since v1: ================= - Drop volatile removal patch (Ilya) - Improve commit messages for RMB patches (Ilya) Maxime Coquelin (4): vhost: enforce avail index and desc read ordering vhost: enforce desc flags and content read ordering vhost: prefetch descriptor after the read barrier vhost: remove useless prefetch for packed ring descriptor lib/librte_vhost/virtio_net.c | 27 ++++++++++++++++++++++----- 1 file changed, 22 insertions(+), 5 deletions(-)
Applied to dpdk-next-virtio. Maxime
