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| 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/virtio.h | |
| 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/virtio.h')
| -rw-r--r-- | src/vnet/devices/virtio/virtio.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/virtio.h b/src/vnet/devices/virtio/virtio.h index b00e1eceb85..acefc387549 100644 --- a/src/vnet/devices/virtio/virtio.h +++ b/src/vnet/devices/virtio/virtio.h @@ -20,6 +20,7 @@ #include <vnet/devices/virtio/virtio_std.h> #include <vnet/devices/virtio/vhost_std.h> +#include <vnet/devices/virtio/virtio_buffering.h> #include <vnet/gso/gro.h> #define foreach_virtio_if_flag \ @@ -76,6 +77,7 @@ typedef struct u16 last_used_idx; u16 last_kick_avail_idx; u32 call_file_index; + virtio_vring_buffering_t *buffering; gro_flow_table_t *flow_table; } virtio_vring_t; @@ -123,6 +125,7 @@ typedef struct CLIB_CACHE_LINE_ALIGN_MARK (cacheline1); int packet_coalesce; + int packet_buffering; u32 dev_instance; u32 numa_node; u64 remote_features; @@ -203,6 +206,7 @@ extern void virtio_set_net_hdr_size (virtio_if_t * vif); extern void virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type); extern void virtio_set_packet_coalesce (virtio_if_t * vif); +clib_error_t *virtio_set_packet_buffering (virtio_if_t * vif, u16 size); extern void virtio_pci_legacy_notify_queue (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id); extern void virtio_pci_modern_notify_queue (vlib_main_t * vm, |