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f406c8b969
sctp: Add buffer utilization fields to /proc/net/sctp/assocs
This patch adds the following fields to /proc/net/sctp/assocs output:
- sk->sk_wmem_alloc as "wmema" (transmit queue bytes committed)
- sk->sk_wmem_queued as "wmemq" (persistent queue size)
- sk->sk_sndbuf as "sndbuf" (size of send buffer in bytes)
- sk->sk_rcvbuf as "rcvbuf" (size of receive buffer in bytes)
When small DATA chunks containing 136 bytes data are sent the TX_QUEUE
(assoc->sndbuf_used) reaches a maximum of 40.9% of sk_sndbuf value when
peer.rwnd = 0. This was diagnosed from sk_wmem_alloc value reaching maximum
value of sk_sndbuf.
TX_QUEUE (assoc->sndbuf_used), sk_wmem_alloc and sk_wmem_queued values are
incremented in sctp_set_owner_w() for outgoing data chunks. Having access to
the above values in /proc/net/sctp/assocs will provide a better understanding
of SCTP buffer management.
With patch applied, example output when peer.rwnd = 0
where:
ASSOC ffff880132298000 is sender
ffff880125343000 is receiver
ASSOC SOCK STY SST ST HBKT ASSOC-ID TX_QUEUE RX_QUEUE \
ffff880132298000 ffff880124a0a0c0 2 1 3 29325 1 214656 0 \
ffff880125343000 ffff8801237d7700 2 1 3 36210 2 0 524520 \
UID INODE LPORT RPORT LADDRS <-> RADDRS HBINT INS OUTS \
0 25108 3455 3456 *10.4.8.3 <-> *10.5.8.3 7500 2 2 \
0 27819 3456 3455 *10.5.8.3 <-> *10.4.8.3 7500 2 2 \
MAXRT T1X T2X RTXC wmema wmemq sndbuf rcvbuf
4 0 0 72 525633 440320 524288 524288
4 0 0 0 1 0 524288 524288
Signed-off-by: Dilip Daya <dilip.daya@hp.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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| .. | ||
| associola.c | ||
| auth.c | ||
| bind_addr.c | ||
| chunk.c | ||
| command.c | ||
| debug.c | ||
| endpointola.c | ||
| input.c | ||
| inqueue.c | ||
| ipv6.c | ||
| Kconfig | ||
| Makefile | ||
| objcnt.c | ||
| output.c | ||
| outqueue.c | ||
| primitive.c | ||
| probe.c | ||
| proc.c | ||
| protocol.c | ||
| sm_make_chunk.c | ||
| sm_sideeffect.c | ||
| sm_statefuns.c | ||
| sm_statetable.c | ||
| socket.c | ||
| ssnmap.c | ||
| sysctl.c | ||
| transport.c | ||
| tsnmap.c | ||
| ulpevent.c | ||
| ulpqueue.c | ||