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authorMohsin Kazmi <sykazmi@cisco.com>2020-09-28 10:26:33 +0000
committerBeno�t Ganne <bganne@cisco.com>2020-09-28 16:47:30 +0000
commite347acbc31111504c015531e8ad764a86d489309 (patch)
tree3a72d961fd97b9ce7985865d89b0c45d27cab2fc /src/vnet/devices/virtio/node.c
parent7741afaf5c66a5d7ed1d2d76ae36a81ec24fdaaa (diff)
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 <sykazmi@cisco.com> Change-Id: Ib93c350298b228e80426e58ac77f3bbc93b8be27
Diffstat (limited to 'src/vnet/devices/virtio/node.c')
-rw-r--r--src/vnet/devices/virtio/node.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/src/vnet/devices/virtio/node.c b/src/vnet/devices/virtio/node.c
index 1c9cfd0cc03..42b2590b342 100644
--- a/src/vnet/devices/virtio/node.c
+++ b/src/vnet/devices/virtio/node.c
@@ -279,11 +279,14 @@ virtio_device_input_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
u16 last = vring->last_used_idx;
u16 n_left = vring->used->idx - last;
- if (vif->packet_coalesce
- && clib_spinlock_trylock_if_init (&txq_vring->lockp))
+ if (clib_spinlock_trylock_if_init (&txq_vring->lockp))
{
- vnet_gro_flow_table_schedule_node_on_dispatcher (vm,
- txq_vring->flow_table);
+ if (vif->packet_coalesce)
+ vnet_gro_flow_table_schedule_node_on_dispatcher (vm,
+ txq_vring->flow_table);
+ else if (vif->packet_buffering)
+ virtio_vring_buffering_schedule_node_on_dispatcher (vm,
+ txq_vring->buffering);
clib_spinlock_unlock_if_init (&txq_vring->lockp);
}