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(parent: 117632e) | patch
tcp: tcp_sendmsg() page recycling
authorEric Dumazet <eric.dumazet@gmail.com>
Sun, 4 Dec 2011 07:05:17 +0000 (07:05 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 4 Dec 2011 18:20:40 +0000 (13:20 -0500)
commit761965eab38d2cbc59c36e355c59609e3a04705a
tree53bc45ee752f8d31323962e5af2e0451376c3b35tree | snapshot
parent117632e64d2a5f464e491fe221d7169a3814a77bcommit | diff
tcp: tcp_sendmsg() page recycling

If our TCP_PAGE(sk) is not shared (page_count() == 1), we can set page
offset to 0.

This permits better filling of the pages on small to medium tcp writes.

"tbench 16" results on my dev server (2x4x2 machine) :

Before : 3072 MB/s
After  : 3146 MB/s  (2.4 % gain)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp.c diff | blob | history
Linux kernel for KaRo TX COM modules