diff options
| author |   Mohsin Kazmi <sykazmi@cisco.com> | 2020-09-28 10:26:33 +0000 |
|---|---|---|
| committer |   Beno�t Ganne <bganne@cisco.com> | 2020-09-28 16:47:30 +0000 |
| commit | e347acbc31111504c015531e8ad764a86d489309 (patch) | |
| tree | 3a72d961fd97b9ce7985865d89b0c45d27cab2fc /src/vnet/devices/virtio/node.c | |
| parent | 7741afaf5c66a5d7ed1d2d76ae36a81ec24fdaaa (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.c | 11 |
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); } |