path: root/include/net
diff options
authorEric Dumazet <edumazet@google.com>2018-11-27 14:42:03 -0800
committerDavid S. Miller <davem@davemloft.net>2018-11-30 13:26:54 -0800
commit4f693b55c3d2d2239b8a0094b518a1e533cf75d5 (patch)
tree3b70704dbf9f7cf27ec16d9321f7c1956b81c3a5 /include/net
parenttcp: make tcp_space() aware of socket backlog (diff)
tcp: implement coalescing on backlog queue
In case GRO is not as efficient as it should be or disabled, we might have a user thread trapped in __release_sock() while softirq handler flood packets up to the point we have to drop. This patch balances work done from user thread and softirq, to give more chances to __release_sock() to complete its work before new packets are added the the backlog. This also helps if we receive many ACK packets, since GRO does not aggregate them. This patch brings ~60% throughput increase on a receiver without GRO, but the spectacular gain is really on 1000x release_sock() latency reduction I have measured. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions