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History

Eric Dumazet 7123aaa3a1 af_unix: speedup /proc/net/unix

/proc/net/unix has quadratic behavior, and can hold unix_table_lock for
a while if high number of unix sockets are alive. (90 ms for 200k
sockets...)

We already have a hash table, so its quite easy to use it.

Problem is unbound sockets are still hashed in a single hash slot
(unix_socket_table[UNIX_HASH_TABLE])

This patch also spreads unbound sockets to 256 hash slots, to speedup
both /proc/net/unix and unix_diag.

Time to read /proc/net/unix with 200k unix sockets :
(time dd if=/proc/net/unix of=/dev/null bs=4k)

before : 520 secs
after : 2 secs

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2012-06-08 14:27:23 -07:00

af_unix.c

af_unix: speedup /proc/net/unix

2012-06-08 14:27:23 -07:00

diag.c

af_unix: speedup /proc/net/unix

2012-06-08 14:27:23 -07:00

garbage.c

Allow passing O_PATH descriptors via SCM_RIGHTS datagrams

2011-03-15 02:21:45 -04:00

Kconfig

net: Default UDP and UNIX diag to 'n'.