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| author | David S. Miller <davem@davemloft.net> | 2021-11-16 14:10:35 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-11-16 14:10:35 +0100 |
| commit | 6fcc06205c15bf1bb90896efdf5967028c154aba (patch) | |
| tree | 9485fbb54c44a7933e5e7904aaebaedbe0f82907 /include/net/ip6_checksum.h | |
| parent | net: macb: Fix several edge cases in validate (diff) | |
| parent | net: move early demux fields close to sk_refcnt (diff) | |
| download | linux-6fcc06205c15bf1bb90896efdf5967028c154aba.tar.xz linux-6fcc06205c15bf1bb90896efdf5967028c154aba.zip | |
Merge branch 'tcp-optimizations'
Eric Dumazet says:
====================
tcp: optimizations for linux-5.17
Mostly small improvements in this series.
The notable change is in "defer skb freeing after
socket lock is released" in recvmsg() (and RX zerocopy)
The idea is to try to let skb freeing to BH handler,
whenever possible, or at least perform the freeing
outside of the socket lock section, for much improved
performance. This idea can probably be extended
to other protocols.
Tests on a 100Gbit NIC
Max throughput for one TCP_STREAM flow, over 10 runs.
MTU : 1500 (1428 bytes of TCP payload per MSS)
Before: 55 Gbit
After: 66 Gbit
MTU : 4096+ (4096 bytes of TCP payload, plus TCP/IPv6 headers)
Before: 82 Gbit
After: 95 Gbit
====================
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip6_checksum.h')
| -rw-r--r-- | include/net/ip6_checksum.h | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/include/net/ip6_checksum.h b/include/net/ip6_checksum.h index b3f4eaa88672..ea681910b7a3 100644 --- a/include/net/ip6_checksum.h +++ b/include/net/ip6_checksum.h @@ -65,15 +65,9 @@ static inline void __tcp_v6_send_check(struct sk_buff *skb, { struct tcphdr *th = tcp_hdr(skb); - if (skb->ip_summed == CHECKSUM_PARTIAL) { - th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0); - skb->csum_start = skb_transport_header(skb) - skb->head; - skb->csum_offset = offsetof(struct tcphdr, check); - } else { - th->check = tcp_v6_check(skb->len, saddr, daddr, - csum_partial(th, th->doff << 2, - skb->csum)); - } + th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0); + skb->csum_start = skb_transport_header(skb) - skb->head; + skb->csum_offset = offsetof(struct tcphdr, check); } static inline void tcp_v6_gso_csum_prep(struct sk_buff *skb) |