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| author | Jan Scheurich <jan.scheurich@ericsson.com> | 2018-04-19 19:40:44 +0200 |
|---|---|---|
| committer | Ian Stokes <ian.stokes@intel.com> | 2018-05-11 08:08:24 +0100 |
| commit | 8492adc270fd9b1774683064764cdf56df995b99 (patch) | |
| tree | 903ac545e94ff87e3457b9953b9473e70a60a77c /lib/netdev.h | |
| parent | 65a87968f4cfd9cf7a433a3156d98118078f9e4e (diff) | |
| download | openvswitch-8492adc270fd9b1774683064764cdf56df995b99.tar.gz | |
netdev: Add optional qfill output parameter to rxq_recv()
If the caller provides a non-NULL qfill pointer and the netdev
implemementation supports reading the rx queue fill level, the rxq_recv()
function returns the remaining number of packets in the rx queue after
reception of the packet burst to the caller. If the implementation does
not support this, it returns -ENOTSUP instead. Reading the remaining queue
fill level should not substantilly slow down the recv() operation.
A first implementation is provided for ethernet and vhostuser DPDK ports
in netdev-dpdk.c.
This output parameter will be used in the upcoming commit for PMD
performance metrics to supervise the rx queue fill level for DPDK
vhostuser ports.
Signed-off-by: Jan Scheurich <jan.scheurich@ericsson.com>
Acked-by: Billy O'Mahony <billy.o.mahony@intel.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
Diffstat (limited to 'lib/netdev.h')
| -rw-r--r-- | lib/netdev.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/netdev.h b/lib/netdev.h index 441e53dae..bd6f45abb 100644 --- a/lib/netdev.h +++ b/lib/netdev.h @@ -175,7 +175,8 @@ void netdev_rxq_close(struct netdev_rxq *); const char *netdev_rxq_get_name(const struct netdev_rxq *); int netdev_rxq_get_queue_id(const struct netdev_rxq *); -int netdev_rxq_recv(struct netdev_rxq *rx, struct dp_packet_batch *); +int netdev_rxq_recv(struct netdev_rxq *rx, struct dp_packet_batch *, + int *qfill); void netdev_rxq_wait(struct netdev_rxq *); int netdev_rxq_drain(struct netdev_rxq *); |