From e347acbc31111504c015531e8ad764a86d489309 Mon Sep 17 00:00:00 2001 From: Mohsin Kazmi Date: Mon, 28 Sep 2020 10:26:33 +0000 Subject: virtio: add packet buffering on tx Type: feature This patch adds packet buffering on tx for slow backend which have some jitter/delays in freeing the vrings. There are some limitations to the current design: 1) It only works in poll mode. 2) Atleast 1 rx queue of an interface (with buffering enabled) should be placed on each worker and main thread. Signed-off-by: Mohsin Kazmi Change-Id: Ib93c350298b228e80426e58ac77f3bbc93b8be27 --- src/vnet/devices/virtio/virtio_api.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'src/vnet/devices/virtio/virtio_api.c') diff --git a/src/vnet/devices/virtio/virtio_api.c b/src/vnet/devices/virtio/virtio_api.c index 9a145d94a41..d9931046083 100644 --- a/src/vnet/devices/virtio/virtio_api.c +++ b/src/vnet/devices/virtio/virtio_api.c @@ -126,15 +126,18 @@ vl_api_virtio_pci_create_v2_t_handler (vl_api_virtio_pci_create_v2_t * mp) STATIC_ASSERT (((int) VIRTIO_API_FLAG_IN_ORDER == (int) VIRTIO_FLAG_IN_ORDER), "virtio in-order api flag mismatch"); + STATIC_ASSERT (((int) VIRTIO_API_FLAG_BUFFERING == + (int) VIRTIO_FLAG_BUFFERING), + "virtio buffering api flag mismatch"); ap->virtio_flags = clib_net_to_host_u32 (mp->virtio_flags); ap->features = clib_net_to_host_u64 (mp->features); - if (ap->virtio_flags & VIRTIO_FLAG_GSO) + if (ap->virtio_flags & VIRTIO_API_FLAG_GSO) ap->gso_enabled = 1; else ap->gso_enabled = 0; - if (ap->virtio_flags & VIRTIO_FLAG_CSUM_OFFLOAD) + if (ap->virtio_flags & VIRTIO_API_FLAG_CSUM_OFFLOAD) ap->checksum_offload_enabled = 1; else ap->checksum_offload_enabled = 0; -- cgit 1.2.3-korg