problem with net subsystem
Eugen Konkov
kes-kes at yandex.ru
Thu Oct 14 17:44:53 UTC 2010
Hi
#top -SI
last pid: 67653; load averages: 1.23, 1.12, 1.24 up 1+09:46:14 20:22:34
94 processes: 3 running, 76 sleeping, 15 waiting
CPU: 0.0% user, 0.0% nice, 33.3% system, 66.7% interrupt, 0.0% idle
Mem: 54M Active, 226M Inact, 103M Wired, 59M Buf, 103M Free
Swap: 2048M Total, 2048M Free
PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND
13 root 1 106 - 0K 8K RUN 251:36 49.02% ng_queue
11 root 1 171 ki31 0K 8K RUN 21.5H 35.60% idle
12 root 15 -44 - 0K 120K WAIT 31:04 12.06% intr
0 root 9 -68 0 0K 64K - 18:13 0.49% kernel
67618 root 1 44 0 10020K 2312K ttyin 0:00 0.34% systat
18710 root 2 44 0 84660K 62868K select 16:11 0.29% mpd5
67653 root 1 44 0 9944K 2020K RUN 0:00 0.15% top
there are no queues nor pipes in ipfw.
#systat -v
users Load
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act count
All pages
Proc: Interrupts
r p d s w Csw Trp Sys Int Sof Flt cow total
zfod
ozfod
. %Sys . %Intr . %User . %Nice . %Idle %ozfod
| | | | | | | | | | | daefr
prcfr
dtbuf totfr
Namei Name-cache Dir-cache desvn react
Calls hits % hits % numvn pdwak
frevn pdpgs
intrn
Disks ad0 wire
KB/t act
tps inact
MB/s cache
%busy free
# vmstat -i
interrupt total rate
irq1: atkbd0 1203 0
irq14: ata0 139502 1
irq15: ata1 35 0
irq19: sis0 0 0
cpu0:timer 258485585 2124
Total 783059828 6436
# ifconfig sis0
sis0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=82048<VLAN_MTU,POLLING,WOL_MAGIC,LINKSTATE>
ether 00:0b:6a:a6:0c:f0
inet 10.11.8.18 netmask 0xffffff00 broadcast 10.11.8.255
inet6 fe80::20b:6aff:fea6:cf0%sis0 prefixlen 64 scopeid 0x1
inet R.E.A.L netmask 0xfffffffc broadcast X.X.X.X
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
#netstat -s
tcp:
205416 packets sent
124715 data packets (8022081 bytes)
1425 data packets (99472 bytes) retransmitted
38 data packets unnecessarily retransmitted
0 resends initiated by MTU discovery
75509 ack-only packets (64514 delayed)
0 URG only packets
0 window probe packets
0 window update packets
3824 control packets
1653273 packets received
115656 acks (for 8017539 bytes)
1967 duplicate acks
0 acks for unsent data
104386 packets (4886466 bytes) received in-sequence
62 completely duplicate packets (1512 bytes)
0 old duplicate packets
0 packets with some dup. data (0 bytes duped)
4 out-of-order packets (112 bytes)
0 packets (0 bytes) of data after window
0 window probes
3 window update packets
1 packet received after close
4 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
0 discarded due to memory problems
1441 connection requests
1091 connection accepts
0 bad connection attempts
6726 listen queue overflows
25 ignored RSTs in the windows
2530 connections established (including accepts)
111289 connections closed (including 214 drops)
2185 connections updated cached RTT on close
2267 connections updated cached RTT variance on close
1516 connections updated cached ssthresh on close
2 embryonic connections dropped
107299 segments updated rtt (of 107034 attempts)
1434 retransmit timeouts
68 connections dropped by rexmit timeout
0 persist timeouts
0 connections dropped by persist timeout
0 Connections (fin_wait_2) dropped because of timeout
0 keepalive timeouts
0 keepalive probes sent
0 connections dropped by keepalive
554 correct ACK header predictions
19107 correct data packet header predictions
6278 syncache entries added
4 retransmitted
0 dupsyn
5 dropped
1091 completed
0 bucket overflow
0 cache overflow
1 reset
0 stale
6726 aborted
0 badack
0 unreach
0 zone failures
6283 cookies sent
1540 cookies received
19 SACK recovery episodes
40 segment rexmits in SACK recovery episodes
18640 byte rexmits in SACK recovery episodes
298 SACK options (SACK blocks) received
2 SACK options (SACK blocks) sent
0 SACK scoreboard overflow
0 packets with ECN CE bit set
0 packets with ECN ECT(0) bit set
0 packets with ECN ECT(1) bit set
0 successful ECN handshakes
0 times ECN reduced the congestion window
udp:
2633751 datagrams received
0 with incomplete header
1 with bad data length field
79 with bad checksum
31975 with no checksum
2172028 dropped due to no socket
158299 broadcast/multicast datagrams undelivered
0 dropped due to full socket buffers
0 not for hashed pcb
303344 delivered
316572 datagrams output
0 times multicast source filter matched
sctp:
.......
ip:
617221119 total packets received
99 bad header checksums
0 with size smaller than minimum
0 with data size < data length
0 with ip length > max ip packet size
0 with header length < data size
0 with data length < header length
0 with bad options
0 with incorrect version number
66 fragments received
0 fragments dropped (dup or out of space)
0 fragments dropped after timeout
33 packets reassembled ok
188676089 packets for this host
46175 packets for unknown/unsupported protocol
428113078 packets forwarded (0 packets fast forwarded)
366167 packets not forwardable
0 packets received for unknown multicast group
0 redirects sent
356645899 packets sent from this host
10295 packets sent with fabricated ip header
514772 output packets dropped due to no bufs, etc.
0 output packets discarded due to no route
88839756 output datagrams fragmented
177696236 fragments created
304600 datagrams that can't be fragmented
0 tunneling packets that can't find gif
0 datagrams with bad address in header
icmp:
2347631 calls to icmp_error
31 errors not generated in response to an icmp message
Output histogram:
echo reply: 2129
destination unreachable: 2346451
time exceeded: 49
0 messages with bad code fields
0 messages less than the minimum length
0 messages with bad checksum
0 messages with bad length
0 multicast echo requests ignored
0 multicast timestamp requests ignored
Input histogram:
echo reply: 8242
destination unreachable: 4417
routing redirect: 37388
echo: 2129
time exceeded: 7414
2129 message responses generated
0 invalid return addresses
0 no return routes
ICMP address mask responses are disabled
igmp:
.....
arp:
825 ARP requests sent
26292 ARP replies sent
246041 ARP requests received
761 ARP replies received
246802 ARP packets received
29 total packets dropped due to no ARP entry
373 ARP entrys timed out
0 Duplicate IPs seen
*6:
.... all values are zero (no ipv6)
pings from client machine to inet (tunnel over pptp):
Ответ от 93.158.134.3: число байт=32 время=64мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=64мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=90мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=60мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=55мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=56мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=64мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=98мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=187мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=137мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=249мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=73мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=159мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=106мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=75мс TTL=55
Ответ от 93.158.134.3: число байт=32 время=58мс TTL=55
# netstat -w 1 -h -d -I sis0
9.8K 0 0 7.7M 12K 0 7.9M 0 0
9.3K 0 0 7.4M 12K 0 7.6M 0 0
7.2K 0 0 5.5M 9.1K 0 5.7M 0 0
7.5K 0 0 5.7M 8.9K 0 5.8M 0 0
8.4K 0 0 6.6M 11K 0 6.8M 0 0
8.9K 0 0 7.1M 11K 0 7.3M 0 0
8.4K 0 0 6.8M 11K 0 7.0M 0 0
input (sis0) output
packets errs idrops bytes packets errs bytes colls drops
8.5K 0 0 6.8M 11K 0 7.0M 0 0
9.3K 0 0 7.4M 12K 0 7.6M 0 0
8.0K 0 0 6.4M 10K 0 6.5M 0 0
7.2K 0 0 5.6M 9.3K 0 5.8M 0 187
8.4K 0 0 6.8M 11K 0 6.9M 0 0
7.9K 0 0 6.0M 9.6K 0 6.1M 0 0
8.2K 0 0 6.4M 9.9K 0 6.5M 0 0
8.5K 0 0 6.7M 10K 0 6.8M 0 0
8.0K 0 0 6.5M 9.9K 0 6.7M 0 0
as you notice there are somitimes drops
Uplink is 75Mbit/s wide.
Where can be a trouble?
--
Eugen Konkov mailto:kes-kes at yandex.ru
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