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| author |   Eric Dumazet <dada1@cosmosbay.com> | 2007-03-04 16:05:44 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:23:27 -0700 |
| commit | fa438ccfdfd3f6db02c13b61b21454eb81cd6a13 (patch) | |
| tree | a1759259d7543586185e2fb9db21461147944f18 /include/asm-x86_64 | |
| parent | [TCP]: FRTO undo response falls back to ratehalving one if ECEd (diff) | |
| download | linux-dev-fa438ccfdfd3f6db02c13b61b21454eb81cd6a13.tar.xz linux-dev-fa438ccfdfd3f6db02c13b61b21454eb81cd6a13.zip | |
[NET]: Keep sk_backlog near sk_lock
sk_backlog is a critical field of struct sock. (known famous words)
It is (ab)used in hot paths, in particular in release_sock(), tcp_recvmsg(),
tcp_v4_rcv(), sk_receive_skb().
It really makes sense to place it next to sk_lock, because sk_backlog is only
used after sk_lock locked (and thus memory cache line in L1 cache). This
should reduce cache misses and sk_lock acquisition time.
(In theory, we could only move the head pointer near sk_lock, and leaving tail
far away, because 'tail' is normally not so hot, but keep it simple :) )
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/asm-x86_64')
0 files changed, 0 insertions, 0 deletions