diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2006-06-30 16:37:03 -0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-06-30 17:12:10 -0400 |
| commit | f83ef8c0b58dac17211a4c0b6df0e2b1bd6637b1 (patch) | |
| tree | 61661a587df97cb2a9f73b5d0d1cf30f09644051 /include/net/tcp_ecn.h | |
| parent | bcd76111178ebccedd46a9b3eaff65c78e5a70af (diff) | |
[IPV6]: Added GSO support for TCPv6
This patch adds GSO support for IPv6 and TCPv6. This is based on a patch
by Ananda Raju <Ananda.Raju@neterion.com>. His original description is:
This patch enables TSO over IPv6. Currently Linux network stacks
restricts TSO over IPv6 by clearing of the NETIF_F_TSO bit from
"dev->features". This patch will remove this restriction.
This patch will introduce a new flag NETIF_F_TSO6 which will be used
to check whether device supports TSO over IPv6. If device support TSO
over IPv6 then we don't clear of NETIF_F_TSO and which will make the
TCP layer to create TSO packets. Any device supporting TSO over IPv6
will set NETIF_F_TSO6 flag in "dev->features" along with NETIF_F_TSO.
In case when user disables TSO using ethtool, NETIF_F_TSO will get
cleared from "dev->features". So even if we have NETIF_F_TSO6 we don't
get TSO packets created by TCP layer.
SKB_GSO_TCPV4 renamed to SKB_GSO_TCP to make it generic GSO packet.
SKB_GSO_UDPV4 renamed to SKB_GSO_UDP as UFO is not a IPv4 feature.
UFO is supported over IPv6 also
The following table shows there is significant improvement in
throughput with normal frames and CPU usage for both normal and jumbo.
--------------------------------------------------
| | 1500 | 9600 |
| ------------------|-------------------|
| | thru CPU | thru CPU |
--------------------------------------------------
| TSO OFF | 2.00 5.5% id | 5.66 20.0% id |
--------------------------------------------------
| TSO ON | 2.63 78.0 id | 5.67 39.0% id |
--------------------------------------------------
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tcp_ecn.h')
| -rw-r--r-- | include/net/tcp_ecn.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/include/net/tcp_ecn.h b/include/net/tcp_ecn.h index 7bb366f70934..4629d77173f2 100644 --- a/include/net/tcp_ecn.h +++ b/include/net/tcp_ecn.h | |||
| @@ -55,9 +55,7 @@ static inline void TCP_ECN_send(struct sock *sk, struct tcp_sock *tp, | |||
| 55 | if (tp->ecn_flags&TCP_ECN_QUEUE_CWR) { | 55 | if (tp->ecn_flags&TCP_ECN_QUEUE_CWR) { |
| 56 | tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR; | 56 | tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR; |
| 57 | skb->h.th->cwr = 1; | 57 | skb->h.th->cwr = 1; |
| 58 | if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) | 58 | skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN; |
| 59 | skb_shinfo(skb)->gso_type |= | ||
| 60 | SKB_GSO_TCPV4_ECN; | ||
| 61 | } | 59 | } |
| 62 | } else { | 60 | } else { |
| 63 | /* ACK or retransmitted segment: clear ECT|CE */ | 61 | /* ACK or retransmitted segment: clear ECT|CE */ |