diff options
| author | Eric Dumazet <edumazet@google.com> | 2014-10-05 21:11:27 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-10-07 01:56:28 +0400 |
| commit | fcbeb976d7ce783fd58e63e61c196d9a8912b3be (patch) | |
| tree | c6dde6923e5316b2bfc4bdb04bd6643515cc1598 /include/linux/netdevice.h | |
| parent | 9d31a7b9f9963e97e067e72ef13492e6ace7d345 (diff) | |
| download | linux-fcbeb976d7ce783fd58e63e61c196d9a8912b3be.tar.xz | |
net: introduce netdevice gso_min_segs attribute
Some TSO engines might have a too heavy setup cost, that impacts
performance on hosts sending small bursts (2 MSS per packet).
This patch adds a device gso_min_segs, allowing drivers to set
a minimum segment size for TSO packets, according to the NIC
performance.
Tested on a mlx4 NIC, this allows to get a ~110% increase of
throughput when sending 2 MSS per packet.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 22d54b9b700d..2df86f50261c 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1416,6 +1416,8 @@ enum netdev_priv_flags { * @gso_max_size: Maximum size of generic segmentation offload * @gso_max_segs: Maximum number of segments that can be passed to the * NIC for GSO + * @gso_min_segs: Minimum number of segments that can be passed to the + * NIC for GSO * * @dcbnl_ops: Data Center Bridging netlink ops * @num_tc: Number of traffic classes in the net device @@ -1666,7 +1668,7 @@ struct net_device { unsigned int gso_max_size; #define GSO_MAX_SEGS 65535 u16 gso_max_segs; - + u16 gso_min_segs; #ifdef CONFIG_DCB const struct dcbnl_rtnl_ops *dcbnl_ops; #endif |