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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-04-28 19:14:43 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-30 16:29:42 -0700 |
| commit | 767dd03369ac18af58efdef0383d6eb986eab426 (patch) | |
| tree | 5af8a861110676a084078a168c27fd3935d41f13 /include/net/sock.h | |
| parent | 21851264120b0bd1f953328cb131abcfa9305bc3 (diff) | |
| download | linux-767dd03369ac18af58efdef0383d6eb986eab426.tar.gz linux-767dd03369ac18af58efdef0383d6eb986eab426.tar.bz2 linux-767dd03369ac18af58efdef0383d6eb986eab426.zip | |
net: speedup sock_recv_ts_and_drops()
sock_recv_ts_and_drops() is fat and slow (~ 4% of cpu time on some
profiles)
We can test all socket flags at once to make fast path fast again.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index d361c7769fe0..e1777db5b9ab 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1635,7 +1635,24 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) sk->sk_stamp = kt; } -extern void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb); +extern void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, + struct sk_buff *skb); + +static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, + struct sk_buff *skb) +{ +#define FLAGS_TS_OR_DROPS ((1UL << SOCK_RXQ_OVFL) | \ + (1UL << SOCK_RCVTSTAMP) | \ + (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE) | \ + (1UL << SOCK_TIMESTAMPING_SOFTWARE) | \ + (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE) | \ + (1UL << SOCK_TIMESTAMPING_SYS_HARDWARE)) + + if (sk->sk_flags & FLAGS_TS_OR_DROPS) + __sock_recv_ts_and_drops(msg, sk, skb); + else + sk->sk_stamp = skb->tstamp; +} /** * sock_tx_timestamp - checks whether the outgoing packet is to be time stamped |