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Czy bylibyście tak uprzejmi i wrzucili tutaj wyniki poniższego polecenia?
$ netstat -s
Dodatkowo, prosiłbym o informacje na temat przepustowości łącza (down/up), ilości dostępnej pamięci RAM i czy macie NAT. Ponadto pokażcie wyniki:
# sysctl -a | egrep -i "rmem|wmem|tcp_mem"
Staty dobrze jest generować gdy system jest online przez co najmniej 4-6h, najlepiej 12 lub dłużej, ew. dajcie znać odnośnie uptime. Jeśli macie odpalone p2p, dobrze jest też zaznaczyć to i najlepiej przeprowadzić dwa testy -- jeden z p2p włączonym, a drugi bez p2p.
Z tego co zaobserwowałem po odpaleniu torrenta, jakoś połączeń drastycznie się obniża -- gwałtownie rośnie liczba retransmisji i nieudanych prób połączeń. Chodzi generalnie o określenie jak często takie niepożądane efekty występują i jakie wartości są do zaakceptowania. Być może da radę obniżyć liczbę błędów transmisyjnych tuningując kernel, może winny jest sprzęt albo zła konfiguracja sieci, etc. W każdym razie info z powyższych poleceń pomoże mi w ustaleniu czy mój net ssie bardziej niż u innych. xD
Ostatnio edytowany przez morfik (2014-05-19 06:11:50)
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Był tu gdzieś na forum skrypt, który wyłączał kompa, kiedy torrent kończył pobieranie, to było o tyle mądrzejsze rozwiązanie, ze czytał bezpośrednio z /proc/net/dev.
Torrent? nawet, jak mu obetniesz prędkość, to on może wykorzystać liczbę jednoczesnych połączeń do sieci, i wtedy pomimo limitu prędkości net się zacina.
W dodatku operatorzy netu obcinają torrenta jak się da, i być może te ograniczenia robiły jakieś lamy, albo sprzęt nawala, i w rezultacie sieć chodzi nie zupełnie tak, jak powinna.
Nie ma sieci idealnych.
sysctl -a | egrep -i "rmem|wmem|tcp_mem" net.core.rmem_default = 524288 net.core.rmem_max = 524288 net.core.wmem_default = 524288 net.core.wmem_max = 524288 net.ipv4.tcp_mem = 524288 524288 524288 net.ipv4.tcp_rmem = 4096 87380 524288 net.ipv4.tcp_wmem = 4096 87380 524288 net.ipv4.udp_rmem_min = 4096 net.ipv4.udp_wmem_min = 4096 net.sctp.sctp_rmem = 4096 865500 4023296 net.sctp.sctp_wmem = 4096 16384 4023296 vm.lowmem_reserve_ratio = 256 256 32
netstat -s Ip: 242297 total packets received 0 forwarded 0 incoming packets discarded 241677 incoming packets delivered 136042 requests sent out 12 outgoing packets dropped Icmp: 258 ICMP messages received 14 input ICMP message failed. ICMP input histogram: destination unreachable: 256 echo replies: 2 36 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 34 echo request: 2 IcmpMsg: InType0: 2 InType3: 256 OutType3: 34 OutType8: 2 Tcp: 723 active connections openings 5 passive connection openings 11 failed connection attempts 7 connection resets received 23 connections established 239288 segments received 133252 segments send out 140 segments retransmited 11 bad segments received. 11 resets sent Udp: 2107 packets received 24 packets to unknown port received. 0 packet receive errors 2498 packets sent 0 receive buffer errors 0 send buffer errors UdpLite: TcpExt: 256 TCP sockets finished time wait in fast timer 17932 delayed acks sent 13 delayed acks further delayed because of locked socket Quick ack mode was activated 114 times 591 packets directly queued to recvmsg prequeue. 12619 bytes directly in process context from backlog 335087 bytes directly received in process context from prequeue 91263 packet headers predicted 160 packets header predicted and directly queued to user 1415 acknowledgments not containing data payload received 1524 predicted acknowledgments 32 congestion windows recovered without slow start after partial ack 1 timeouts in loss state 69 other TCP timeouts TCPLossProbes: 59 TCPLossProbeRecovery: 59 1261 DSACKs sent for old packets 141 DSACKs sent for out of order packets 63 DSACKs received 15 connections reset due to unexpected data 6 connections reset due to early user close 7 connections aborted due to timeout TCPDSACKIgnoredNoUndo: 37 TCPSackShiftFallback: 7 IPReversePathFilter: 175 TCPRcvCoalesce: 201146 TCPOFOQueue: 70906 TCPOFOMerge: 78 TCPChallengeACK: 12 TCPSYNChallenge: 11 IpExt: OutMcastPkts: 2 InBcastPkts: 361 InOctets: 341741300 OutOctets: 7810427 OutMcastOctets: 321 InBcastOctets: 155832 InNoECTPkts: 242297
Netstat do statystyk się nadaje, jak młotek blacharski do nosa.
Lepiej poszukać jakiegoś skrypta do mrtg.
Ostatnio edytowany przez Jacekalex (2014-05-19 06:21:26)
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Był tu gdzieś na forum skrypt, który wyłączał kompa, kiedy torrent kończył pobieranie[/quote]
To chyba ma każdy klient torrenta zaimplementowane standardowo
U mnie sieć chyba działa bez zarzutu (po wdrożeniu traffic control), jednak liczba retransmisji i nieudanych prób połączeń na poziomie 0.1-1% nie jest chyba tym czego należy oczekiwać. Fakt jest, że to dotyczy głównie p2p. Jak mi liczniki trochę nabiją to zrobię zrzuty i sobie porównam.
Rzucę też okiem na ten mrtg jak będę miał chwilę.
Jacekalex mógł jeszcze powiedzieć jaki masz net i ile masz ramu i czy masz NAT?
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Połączenie pppoe, ram 4GB, na drugim końcu kabla, za iluśtam switchami stoi jakiś Juniper z softem JunosOS bazującym na FreeBSD.
NATu nie widzę, żadnego, mam publiczny IP.
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Na umowie pisze 30 Mbit, faktycznie przy 1,6 MB/s co kilkadziesiąt MB zdycha połączenie, zazwyczaj starcza restart połączenia.
W biurze ISP widzę tylko głupie miny, u mnie identycznie to działa na Gentoo i Debianie, demona pppd sobie w końcu tak ustawiłem, że robi automatyczny reconnect po kilku sekundach od rozłączenia.
Konfig:
noipdefault defaultroute hide-password lcp-echo-failure 1 lcp-echo-adaptive noauth persist lock holdoff 3 plugin rp-pppoe.so nic-net user "{username}"
Pozdro
;-)
Ostatnio edytowany przez Jacekalex (2014-05-19 07:09:51)
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Dla porownania
netstat -s Ip: 3396 total packets received 0 forwarded 0 incoming packets discarded 3394 incoming packets delivered 3554 requests sent out 24 dropped because of missing route Icmp: 0 ICMP messages received 0 input ICMP message failed. Histogramme d'entrée ICMP 0 ICMP messages sent 0 ICMP messages failed Histogramme de sortie ICMP Tcp: 279 active connections openings 0 passive connection openings 12 failed connection attempts 3 connection resets received 10 connections established 3746 segments received 3727 segments send out 268 segments retransmited 38 bad segments received. 48 resets sent Udp: 188 packets received 0 packets to unknown port received. 0 packet receive errors 145 packets sent UdpLite: TcpExt: 74 TCP sockets finished time wait in fast timer 89 delayed acks sent Quick ack mode was activated 6 times 1742 packet headers predicted 559 acknowledgments not containing data payload received 160 predicted acknowledgments 6 congestion windows recovered without slow start after partial ack 69 other TCP timeouts TCPLossProbes: 27 TCPLossProbeRecovery: 7 6 DSACKs sent for old packets 19 connections reset due to unexpected data 1 connections reset due to early user close 4 connections aborted due to timeout TCPRcvCoalesce: 770 TCPOFOQueue: 21 TCPChallengeACK: 38 TCPSYNChallenge: 38 IpExt: InNoRoutes: 2 InMcastPkts: 52 OutMcastPkts: 11 InBcastPkts: 4 InOctets: 5542068 OutOctets: 651277 InMcastOctets: 10005 OutMcastOctets: 3083 InBcastOctets: 958 InNoECTPkts: 5470
uptime
uptime 08:00:29 up 26 min, 4 users, load average: 0,21, 0,12, 0,12
Swiatlowody /fibra optyczna, ram 4GB, przepustowosc okolo 10 MB/s (download) i 2,5 MB/s (upload) czasem zwykly film 675 MB/Mo wpada do 2 minut (jak nie blokuja)
sysctl -a | egrep -i "rmem|wmem|tcp_mem" net.core.rmem_default = 212992 net.core.rmem_max = 212992 net.core.wmem_default = 212992 net.core.wmem_max = 212992 net.ipv4.tcp_mem = 93156 124210 186312 net.ipv4.tcp_rmem = 4096 87380 6291456 net.ipv4.tcp_wmem = 4096 16384 4194304 net.ipv4.udp_rmem_min = 4096 net.ipv4.udp_wmem_min = 4096 vm.lowmem_reserve_ratio = 256 256 32
Na wszelki wypadek przed chwila aktualizowalem jadro 3.14
Ostatnio edytowany przez darius (2014-05-19 08:38:56)
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Czas pracy mały bo był update
$ uptime 9:44AM up 15 days, 18:37, 1 user, load averages: 0.12, 0.17, 0.13
100/100mbps
$ netstat -s tcp: 167928 packets sent 158668 data packets (42269498 bytes) 3759 data packets (60557 bytes) retransmitted 1 data packet unnecessarily retransmitted 0 resends initiated by MTU discovery 97847 ack-only packets (0 delayed) 0 URG only packets 0 window probe packets 5750 window update packets 7982 control packets 532814 packets received 51304 acks (for 42205579 bytes) 5722 duplicate acks 0 acks for unsent data 87165 packets (97217497 bytes) received in-sequence 176 completely duplicate packets (2083 bytes) 0 old duplicate packets 0 packets with some dup. data (0 bytes duped) 79 out-of-order packets (114392 bytes) 0 packets (0 bytes) of data after window 0 window probes 15 window update packets 6 packets received after close 150 discarded for bad checksums 0 discarded for bad header offset fields 0 discarded because packet too short 0 discarded due to memory problems 1503 connection requests 6651 connection accepts 0 bad connection attempts 0 listen queue overflows 1092 ignored RSTs in the windows 6718 connections established (including accepts) 8152 connections closed (including 336 drops) 873 connections updated cached RTT on close 875 connections updated cached RTT variance on close 128 connections updated cached ssthresh on close 435 embryonic connections dropped 49374 segments updated rtt (of 34009 attempts) 3703 retransmit timeouts 17 connections dropped by rexmit timeout 0 persist timeouts 0 connections dropped by persist timeout 0 Connections (fin_wait_2) dropped because of timeout 435 keepalive timeouts 0 keepalive probes sent 435 connections dropped by keepalive 9888 correct ACK header predictions 78432 correct data packet header predictions 6709 syncache entries added 66 retransmitted 3 dupsyn 0 dropped 6651 completed 0 bucket overflow 0 cache overflow 37 reset 21 stale 0 aborted 0 badack 0 unreach 0 zone failures 6709 cookies sent 0 cookies received 34 hostcache entries added 0 bucket overflow 1 SACK recovery episode 1 segment rexmit in SACK recovery episodes 1348 byte rexmits in SACK recovery episodes 32 SACK options (SACK blocks) received 84 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: 1719448 datagrams received 0 with incomplete header 0 with bad data length field 85 with bad checksum 15 with no checksum 599050 dropped due to no socket 191898 broadcast/multicast datagrams undelivered 0 dropped due to full socket buffers 0 not for hashed pcb 928415 delivered 1568857 datagrams output 0 times multicast source filter matched sctp: 0 input packets 0 datagrams 0 packets that had data 0 input SACK chunks 0 input DATA chunks 0 duplicate DATA chunks 0 input HB chunks 0 HB-ACK chunks 0 input ECNE chunks 0 input AUTH chunks 0 chunks missing AUTH 0 invalid HMAC ids received 0 invalid secret ids received 0 auth failed 0 fast path receives all one chunk 0 fast path multi-part data 0 output packets 0 output SACKs 0 output DATA chunks 0 retransmitted DATA chunks 0 fast retransmitted DATA chunks 0 FR's that happened more than once to same chunk 0 output HB chunks 0 output ECNE chunks 0 output AUTH chunks 0 ip_output error counter Packet drop statistics: 0 from middle box 0 from end host 0 with data 0 non-data, non-endhost 0 non-endhost, bandwidth rep only 0 not enough for chunk header 0 not enough data to confirm 0 where process_chunk_drop said break 0 failed to find TSN 0 attempt reverse TSN lookup 0 e-host confirms zero-rwnd 0 midbox confirms no space 0 data did not match TSN 0 TSN's marked for Fast Retran Timeouts: 0 iterator timers fired 0 T3 data time outs 0 window probe (T3) timers fired 0 INIT timers fired 0 sack timers fired 0 shutdown timers fired 0 heartbeat timers fired 0 a cookie timeout fired 0 an endpoint changed its cookiesecret 0 PMTU timers fired 0 shutdown ack timers fired 0 shutdown guard timers fired 0 stream reset timers fired 0 early FR timers fired 0 an asconf timer fired 0 auto close timer fired 0 asoc free timers expired 0 inp free timers expired 0 packet shorter than header 0 checksum error 0 no endpoint for port 0 bad v-tag 0 bad SID 0 no memory 0 number of multiple FR in a RTT window 0 RFC813 allowed sending 0 RFC813 does not allow sending 0 times max burst prohibited sending 0 look ahead tells us no memory in interface 0 numbers of window probes sent 0 times an output error to clamp down on next user send 0 times sctp_senderrors were caused from a user 0 number of in data drops due to chunk limit reached 0 number of in data drops due to rwnd limit reached 0 times a ECN reduced the cwnd 0 used express lookup via vtag 0 collision in express lookup 0 times the sender ran dry of user data on primary 0 same for above 0 sacks the slow way 0 window update only sacks sent 0 sends with sinfo_flags !=0 0 unordered sends 0 sends with EOF flag set 0 sends with ABORT flag set 208 times protocol drain called 0 times we did a protocol drain 0 times recv was called with peek 0 cached chunks used 0 cached stream oq's used 0 unread messages abandonded by close 0 send burst avoidance, already max burst inflight to net 0 send cwnd full avoidance, already max burst inflight to net 0 number of map array over-runs via fwd-tsn's ip: 187614644 total packets received 0 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 0 fragments received 0 fragments dropped (dup or out of space) 0 fragments dropped after timeout 0 packets reassembled ok 3614327 packets for this host 98677 packets for unknown/unsupported protocol 126871467 packets forwarded (0 packets fast forwarded) 120391 packets not forwardable 0 packets received for unknown multicast group 0 redirects sent 3210089 packets sent from this host 0 packets sent with fabricated ip header 0 output packets dropped due to no bufs, etc. 0 output packets discarded due to no route 71 output datagrams fragmented 259 fragments created 0 datagrams that can't be fragmented 0 tunneling packets that can't find gif 746 datagrams with bad address in header icmp: 108468 calls to icmp_error 0 errors not generated in response to an icmp message Output histogram: echo reply: 114 destination unreachable: 108468 0 messages with bad code fields 0 messages less than the minimum length 348 messages with bad checksum 0 messages with bad length 0 multicast echo requests ignored 0 multicast timestamp requests ignored Input histogram: echo reply: 1361396 destination unreachable: 554 echo: 114 time exceeded: 1 114 message responses generated 0 invalid return addresses 0 no return routes ICMP address mask responses are disabled igmp: 90901 messages received 0 messages received with too few bytes 0 messages received with wrong TTL 0 messages received with bad checksum 90901 V1/V2 membership queries received 0 V3 membership queries received 0 membership queries received with invalid field(s) 90898 general queries received 3 group queries received 0 group-source queries received 0 group-source queries dropped 0 membership reports received 0 membership reports received with invalid field(s) 0 membership reports received for groups to which we belong 0 V3 reports received without Router Alert 0 membership reports sent ipsec: 0 inbound packets processed successfully 0 inbound packets violated process security policy 0 inbound packets with no SA available 0 invalid inbound packets 0 inbound packets failed due to insufficient memory 0 inbound packets failed getting SPI 0 inbound packets failed on AH replay check 0 inbound packets failed on ESP replay check 0 inbound packets considered authentic 0 inbound packets failed on authentication 0 outbound packets processed successfully 0 outbound packets violated process security policy 0 outbound packets with no SA available 0 invalid outbound packets 0 outbound packets failed due to insufficient memory 0 outbound packets with no route 0 SPD cache lookups 0 SPD cache misses 0 inbound packets violated process security policy 0 outbound packets violated process security policy 0 outbound packets with no SA available 0 outbound packets failed due to insufficient memory 0 outbound packets with no route available 0 invalid outbound packets 0 outbound packets with bundled SAs 0 mbufs coalesced during clone 0 clusters coalesced during clone 0 clusters copied during clone 0 mbufs inserted during makespace ah: 0 packets shorter than header shows 0 packets dropped; protocol family not supported 0 packets dropped; no TDB 0 packets dropped; bad KCR 0 packets dropped; queue full 0 packets dropped; no transform 0 replay counter wraps 0 packets dropped; bad authentication detected 0 packets dropped; bad authentication length 0 possible replay packets detected 0 packets in 0 packets out 0 packets dropped; invalid TDB 0 bytes in 0 bytes out 0 packets dropped; larger than IP_MAXPACKET 0 packets blocked due to policy 0 crypto processing failures 0 tunnel sanity check failures esp: 0 packets shorter than header shows 0 packets dropped; protocol family not supported 0 packets dropped; no TDB 0 packets dropped; bad KCR 0 packets dropped; queue full 0 packets dropped; no transform 0 packets dropped; bad ilen 0 replay counter wraps 0 packets dropped; bad encryption detected 0 packets dropped; bad authentication detected 0 possible replay packets detected 0 packets in 0 packets out 0 packets dropped; invalid TDB 0 bytes in 0 bytes out 0 packets dropped; larger than IP_MAXPACKET 0 packets blocked due to policy 0 crypto processing failures 0 tunnel sanity check failures ipcomp: 0 packets shorter than header shows 0 packets dropped; protocol family not supported 0 packets dropped; no TDB 0 packets dropped; bad KCR 0 packets dropped; queue full 0 packets dropped; no transform 0 replay counter wraps 0 packets in 0 packets out 0 packets dropped; invalid TDB 0 bytes in 0 bytes out 0 packets dropped; larger than IP_MAXPACKET 0 packets blocked due to policy 0 crypto processing failures 0 packets sent uncompressed; size < compr. algo. threshold 0 packets sent uncompressed; compression was useless pim: 0 messages received 0 bytes received 0 messages received with too few bytes 0 messages received with bad checksum 0 messages received with bad version 0 data register messages received 0 data register bytes received 0 data register messages received on wrong iif 0 bad registers received 0 data register messages sent 0 data register bytes sent carp: 0 packets received (IPv4) 0 packets received (IPv6) 0 packets discarded for wrong TTL 0 packets shorter than header 0 discarded for bad checksums 0 discarded packets with a bad version 0 discarded because packet too short 0 discarded for bad authentication 0 discarded for bad vhid 0 discarded because of a bad address list 0 packets sent (IPv4) 0 packets sent (IPv6) 0 send failed due to mbuf memory error pfsync: 0 packets received (IPv4) 0 packets received (IPv6) 0 packets discarded for bad interface 0 packets discarded for bad ttl 0 packets shorter than header 0 packets discarded for bad version 0 packets discarded for bad HMAC 0 packets discarded for bad action 0 packets discarded for short packet 0 states discarded for bad values 0 stale states 0 failed state lookup/inserts 0 packets sent (IPv4) 0 packets sent (IPv6) 0 send failed due to mbuf memory error 0 send error arp: 100999 ARP requests sent 37845 ARP replies sent 1272253 ARP requests received 801 ARP replies received 1273054 ARP packets received 122963 total packets dropped due to no ARP entry 9471 ARP entrys timed out 1 Duplicate IP seen ip6: 596 total packets received 0 with size smaller than minimum 0 with data size < data length 0 with bad options 0 with incorrect version number 0 fragments received 0 fragments dropped (dup or out of space) 0 fragments dropped after timeout 0 fragments that exceeded limit 0 packets reassembled ok 538 packets for this host 0 packets forwarded 0 packets not forwardable 0 redirects sent 8 packets sent from this host 0 packets sent with fabricated ip header 0 output packets dropped due to no bufs, etc. 19 output packets discarded due to no route 0 output datagrams fragmented 0 fragments created 0 datagrams that can't be fragmented 0 packets that violated scope rules 538 multicast packets which we don't join Input histogram: UDP: 8 ICMP6: 588 Mbuf statistics: 0 one mbuf 596 one ext mbuf 0 two or more ext mbuf 0 packets whose headers are not continuous 0 tunneling packets that can't find gif 0 packets discarded because of too many headers 0 failures of source address selection Source addresses selection rule applied: icmp6: 0 calls to icmp6_error 0 errors not generated in response to an icmp6 message 0 errors not generated because of rate limitation Output histogram: neighbor solicitation: 2 MLDv2 listener report: 6 0 messages with bad code fields 0 messages < minimum length 0 bad checksums 0 messages with bad length Input histogram: neighbor advertisement: 50 Histogram of error messages to be generated: 0 no route 0 administratively prohibited 0 beyond scope 0 address unreachable 0 port unreachable 0 packet too big 0 time exceed transit 0 time exceed reassembly 0 erroneous header field 0 unrecognized next header 0 unrecognized option 0 redirect 0 unknown 0 message responses generated 0 messages with too many ND options 0 messages with bad ND options 0 bad neighbor solicitation messages 0 bad neighbor advertisement messages 0 bad router solicitation messages 0 bad router advertisement messages 0 bad redirect messages 0 path MTU changes ipsec6: 0 inbound packets processed successfully 0 inbound packets violated process security policy 0 inbound packets with no SA available 0 invalid inbound packets 0 inbound packets failed due to insufficient memory 0 inbound packets failed getting SPI 0 inbound packets failed on AH replay check 0 inbound packets failed on ESP replay check 0 inbound packets considered authentic 0 inbound packets failed on authentication 0 outbound packets processed successfully 0 outbound packets violated process security policy 0 outbound packets with no SA available 0 invalid outbound packets 0 outbound packets failed due to insufficient memory 0 outbound packets with no route 0 SPD cache lookups 0 SPD cache misses 0 inbound packets violated process security policy 0 outbound packets violated process security policy 0 outbound packets with no SA available 0 outbound packets failed due to insufficient memory 0 outbound packets with no route available 0 invalid outbound packets 0 outbound packets with bundled SAs 0 mbufs coalesced during clone 0 clusters coalesced during clone 0 clusters copied during clone 0 mbufs inserted during makespace rip6: 0 messages received 0 checksum calculations on inbound 0 messages with bad checksum 0 messages dropped due to no socket 0 multicast messages dropped due to no socket 0 messages dropped due to full socket buffers 0 delivered 0 datagrams output pfkey: 2 requests sent from userland 32 bytes sent from userland histogram by message type: flush: 1 x_spdflush: 1 0 messages with invalid length field 0 messages with invalid version field 0 messages with invalid message type field 0 messages too short 0 messages with memory allocation failure 0 messages with duplicate extension 0 messages with invalid extension type 0 messages with invalid sa type 0 messages with invalid address extension 2 requests sent to userland 32 bytes sent to userland histogram by message type: flush: 1 x_spdflush: 1 0 messages toward single socket 0 messages toward all sockets 0 messages toward registered sockets 0 messages with memory allocation failure
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Taki jest w OpenBSD (na co wskazują też protokoły jak carp, czy pfsync)
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[quote=morfik]qluk — co ty masz za netstata, że ci inne staty pokazuje niż nam? xD[/quote]
Fajniejszego :P
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to ja też sobie wrzuce a co :P
Bez p2p, 100/100 teoretycznie ;)
[root@hera ~ ]$ uname -a OpenBSD hera.ga 5.4 GENERIC#37 amd64
[root@hera ~ ]$ uptime 3:24PM up 31 days, 14:40, 3 users, load averages: 0.08, 0.09, 0.08
[root@hera ~ ]$ netstat -s ip: 7819756 total packets received 0 bad header checksums 0 with size smaller than minimum 0 with data size < data length 0 with header length < data size 0 with data length < header length 0 with bad options 0 with incorrect version number 0 fragments received 0 fragments dropped (duplicates or out of space) 0 malformed fragments dropped 0 fragments dropped after timeout 0 packets reassembled ok 7617681 packets for this host 1236 packets for unknown/unsupported protocol 0 packets forwarded 137567 packets not forwardable 0 redirects sent 6549161 packets sent from this host 0 packets sent with fabricated ip header 0 output packets dropped due to no bufs, etc. 0 output packets discarded due to no route 0 output datagrams fragmented 0 fragments created 0 datagrams that can't be fragmented 0 fragment floods 0 packets with ip length > max ip packet size 0 tunneling packets that can't find gif 0 datagrams with bad address in header 0 input datagrams checksum-processed by hardware 0 output datagrams checksum-processed by hardware 0 multicast packets which we don't join icmp: 2637 calls to icmp_error 0 errors not generated because old message was icmp Output packet histogram: echo reply: 177 destination unreachable: 2637 time stamp reply: 1 0 messages with bad code fields 0 messages < minimum length 4 bad checksums 0 messages with bad length 0 echo requests to broadcast/multicast rejected Input packet histogram: echo reply: 41 destination unreachable: 1142 echo: 177 time exceeded: 52 time stamp: 1 time stamp reply: 1 178 message responses generated igmp: 0 messages received 0 messages received with too few bytes 0 messages received with bad checksum 0 membership queries received 0 membership queries received with invalid field(s) 0 membership reports received 0 membership reports received with invalid field(s) 0 membership reports received for groups to which we belong 0 membership reports sent ipencap: 0 total input packets 0 total output packets 0 packets shorter than header shows 0 packets dropped due to policy 0 packets with possibly spoofed local addresses 0 packets were dropped due to full output queue 0 input bytes 0 output bytes 0 protocol family mismatches 0 attempts to use tunnel with unspecified endpoint(s) tcp: 6280579 packets sent 3861605 data packets (3225729100 bytes) 66391 data packets (19704034 bytes) retransmitted 3 fast retransmitted packets 1616711 ack-only packets (2774106 delayed) 0 URG only packets 0 window probe packets 485029 window update packets 251731 control packets 0 packets hardware-checksummed 6601450 packets received 3425811 acks (for 3210197281 bytes) 322842 duplicate acks 0 acks for unsent data 0 acks for old data 3545677 packets (2627709705 bytes) received in-sequence 94496 completely duplicate packets (4860599 bytes) 20891 old duplicate packets 452 packets with some duplicate data (118053 bytes duplicated) 216598 out-of-order packets (103642023 bytes) 1 packet (1 byte) of data after window 1 window probe 30612 window update packets 219 packets received after close 63 discarded for bad checksums 0 discarded for bad header offset fields 0 discarded because packet too short 0 discarded for missing IPsec protection 0 discarded due to memory shortage 6229863 packets hardware-checksummed 0 bad/missing md5 checksums 0 good md5 checksums 24861 connection requests 204173 connection accepts 228844 connections established (including accepts) 231021 connections closed (including 784 drops) 0 connections drained 183 embryonic connections dropped 3210150 segments updated rtt (of 2788793 attempts) 63207 retransmit timeouts 128 connections dropped by rexmit timeout 1 persist timeout 26290 keepalive timeouts 13242 keepalive probes sent 46 connections dropped by keepalive 290749 correct ACK header predictions 2239942 correct data packet header predictions 427887 PCB cache misses 0 ECN connections accepted 0 ECE packets received 0 CWR packets received 0 CE packets received 0 ECT packets sent 0 ECE packets sent 0 CWR packets sent cwr by fastrecovery: 5083 cwr by timeout: 63207 cwr by ecn: 0 118 bad connection attempts 205929 SYN cache entries added 0 hash collisions 204173 completed 0 aborted (no space to build PCB) 358 timed out 0 dropped due to overflow 0 dropped due to bucket overflow 1398 dropped due to RST 0 dropped due to ICMP unreachable 3635 SYN,ACKs retransmitted 7837 duplicate SYNs received for entries already in the cache 0 SYNs dropped (no route or no space) 5080 SACK recovery episodes 10241 segment rexmits in SACK recovery episodes 14182605 byte rexmits in SACK recovery episodes 201283 SACK options received 77891 SACK options sent udp: 1016050 datagrams received 0 with incomplete header 0 with bad data length field 0 with bad checksum 735 with no checksum 0 input packets hardware-checksummed 0 output packets hardware-checksummed 2637 dropped due to no socket 773666 broadcast/multicast datagrams dropped due to no socket 0 dropped due to missing IPsec protection 0 dropped due to full socket buffers 239747 delivered 239870 datagrams output 10401 missed PCB cache esp: 0 input ESP packets 0 output ESP packets 0 packets from unsupported protocol families 0 packets shorter than header shows 0 packets dropped due to policy 0 packets for which no TDB was found 0 input packets that failed to be processed 0 packets with bad encryption received 0 packets that failed verification received 0 packets for which no XFORM was set in TDB received 0 packets were dropped due to full output queue 0 packets where counter wrapping was detected 0 possibly replayed packets received 0 packets with bad payload size or padding received 0 packets attempted to use an invalid TDB 0 packets got larger than max IP packet size 0 packets that failed crypto processing 0 input UDP encapsulated ESP packets 0 output UDP encapsulated ESP packets 0 UDP packets for non-encapsulating TDB received 0 input bytes 0 output bytes ah: 0 input AH packets 0 output AH packets 0 packets from unsupported protocol families 0 packets shorter than header shows 0 packets dropped due to policy 0 packets for which no TDB was found 0 input packets that failed to be processed 0 packets that failed verification received 0 packets for which no XFORM was set in TDB received 0 packets were dropped due to full output queue 0 packets where counter wrapping was detected 0 possibly replayed packets received 0 packets with bad authenticator length received 0 packets attempted to use an invalid TDB 0 packets got larger than max IP packet size 0 packets that failed crypto processing 0 input bytes 0 output bytes etherip: 0 packets shorter than header shows 0 packets were dropped due to full output queue 0 packets were dropped because of no interface/bridge information 0 packets dropped due to policy 0 packets dropped for other reasons 0 input ethernet-in-IP packets 0 output ethernet-in-IP packets 0 input bytes 0 output bytes ipcomp: 0 input IPCOMP packets 0 output IPCOMP packets 0 packets from unsupported protocol families 0 packets shorter than header shows 0 packets dropped due to policy 0 packets for which no TDB was found 0 input packets that failed to be processed 0 packets for which no XFORM was set in TDB received 0 packets were dropped due to full output queue 0 packets where counter wrapping was detected 0 packets attempted to use an invalid TDB 0 packets got larger than max IP packet size 0 packets that failed (de)compression processing 0 packets less than minimum compression length 0 input bytes 0 output bytes carp: 0 packets received (IPv4) 0 packets received (IPv6) 0 packets discarded for bad interface 0 packets discarded for wrong TTL 0 packets shorter than header 0 discarded for bad checksums 0 discarded packets with a bad version 0 discarded because packet too short 0 discarded for bad authentication 0 discarded for unknown vhid 0 discarded because of a bad address list 0 packets sent (IPv4) 0 packets sent (IPv6) 0 send failed due to mbuf memory error 0 transitions to master pfsync: 0 packets received (IPv4) 0 packets received (IPv6) 0 packets discarded for bad interface 0 packets discarded for bad ttl 0 packets shorter than header 0 packets discarded for bad version 0 packets discarded for bad HMAC 0 packets discarded for bad action 0 packets discarded for short packet 0 states discarded for bad values 0 stale states 0 failed state lookup/inserts 0 packets sent (IPv4) 0 packets sent (IPv6) 0 send failed due to mbuf memory error 0 send error divert: 0 total packets received 0 dropped due to no socket 0 dropped due to full socket buffers 0 packets output 0 errors pflow: 0 flows sent 0 packets sent 0 send failed due to mbuf memory error 0 send error ip6: 42472 total packets received 0 with size smaller than minimum 0 with data size < data length 0 with bad options 0 with incorrect version number 0 fragments received 0 fragments dropped (duplicates or out of space) 0 fragments dropped after timeout 0 fragments that exceeded limit 0 packets reassembled ok 0 packets for this host 0 packets forwarded 0 packets not forwardable 0 redirects sent 8 packets sent from this host 0 packets sent with fabricated ip header 0 output packets dropped due to no bufs, etc. 0 output packets discarded due to no route 0 output datagrams fragmented 0 fragments created 0 datagrams that can't be fragmented 0 packets that violated scope rules 0 multicast packets which we don't join Input packet histogram: ICMP6: 42472 Mbuf statistics: 0 one mbufs 42472 one ext mbufs 0 two or more ext mbufs 0 tunneling packets that can't find gif 0 packets discarded due to too many headers 0 failures of source address selection 0 forward cache hit 0 forward cache miss divert6: 0 total packets received 0 dropped due to no socket 0 dropped due to full socket buffers 0 packets output 0 errors icmp6: 0 calls to icmp6_error 0 errors not generated because old message was icmp6 or so 0 errors not generated because of rate limitation Output packet histogram: multicast listener report: 8 0 messages with bad code fields 0 messages < minimum length 0 bad checksums 0 messages with bad length Input packet histogram: neighbor advertisement: 41365 Histogram of error messages to be generated: 0 no route 0 administratively prohibited 0 beyond scope 0 address unreachable 0 port unreachable 0 packet too big 0 time exceed transit 0 time exceed reassembly 0 erroneous header field 0 unrecognized next header 0 unrecognized option 0 redirect 0 unknown 0 message responses generated 0 messages with too many ND options 0 messages with bad ND options 0 bad neighbor solicitation messages 4 bad neighbor advertisement messages 0 bad router solicitation messages 0 bad router advertisement messages 0 bad redirect messages 0 path MTU changes pim6: 0 messages received 0 messages received with too few bytes 0 messages received with bad checksum 0 messages received with bad version 0 registers received 0 bad registers received 0 registers sent rip6: 0 messages received 0 checksum calculations on inbound 0 messages with bad checksum 0 messages dropped due to no socket 0 multicast messages dropped due to no socket 0 messages dropped due to full socket buffers 0 delivered 0 datagrams output [root@hera ~ ]$
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Stacjonarka (bez p2p)
[winnetou@localhost ~]$ uname -a && uptime Linux localhost 3.13.6-1-ARCH #1 SMP PREEMPT Fri Mar 7 22:47:48 CET 2014 x86_64 GNU/Linux 16:57:14 up 39 days, 25 min, 10 users, load average: 1,25, 1,30, 1,10
[winnetou@localhost ~]$ netstat -s Ip: 72490738 total packets received 0 forwarded 0 incoming packets discarded 72096308 incoming packets delivered 69915493 requests sent out Icmp: 925281 ICMP messages received 433562 input ICMP message failed. ICMP input histogram: destination unreachable: 920145 timeout in transit: 967 source quenches: 12 echo replies: 4157 934500 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 787627 echo request: 146873 IcmpMsg: InType0: 4157 InType3: 920145 InType4: 12 InType11: 967 OutType3: 787627 OutType8: 146873 Tcp: 2166735 active connections openings 82 passive connection openings 352094 failed connection attempts 27778 connection resets received 78 connections established 70951237 segments received 68771003 segments send out 1846905 segments retransmited 6689 bad segments received. 79729 resets sent Udp: 140991 packets received 1334 packets to unknown port received. 0 packet receive errors 238490 packets sent 0 receive buffer errors 0 send buffer errors UdpLite: TcpExt: 10 packets pruned from receive queue because of socket buffer overrun 114 ICMP packets dropped because they were out-of-window 980618 TCP sockets finished time wait in fast timer 8527 packets rejects in established connections because of timestamp 1624730 delayed acks sent 515 delayed acks further delayed because of locked socket Quick ack mode was activated 171577 times 44962 packets directly queued to recvmsg prequeue. 1428 bytes directly in process context from backlog 45742567 bytes directly received in process context from prequeue 31753263 packet headers predicted 30240 packets header predicted and directly queued to user 7999231 acknowledgments not containing data payload received 17654019 predicted acknowledgments 2 times recovered from packet loss due to fast retransmit 11965 times recovered from packet loss by selective acknowledgements 33 bad SACK blocks received Detected reordering 11 times using FACK Detected reordering 440 times using SACK Detected reordering 1 times using reno fast retransmit Detected reordering 268 times using time stamp 71 congestion windows fully recovered without slow start 344 congestion windows partially recovered using Hoe heuristic 1771 congestion windows recovered without slow start by DSACK 16110 congestion windows recovered without slow start after partial ack TCPLostRetransmit: 153 2 timeouts after reno fast retransmit 2256 timeouts after SACK recovery 157 timeouts in loss state 17086 fast retransmits 1819 forward retransmits 1269 retransmits in slow start 903610 other TCP timeouts TCPLossProbes: 197617 TCPLossProbeRecovery: 82860 1555 SACK retransmits failed 3 times receiver scheduled too late for direct processing 1611 packets collapsed in receive queue due to low socket buffer 176084 DSACKs sent for old packets 1184 DSACKs sent for out of order packets 131538 DSACKs received 49 DSACKs for out of order packets received 11837 connections reset due to unexpected data 20968 connections reset due to early user close 3214 connections aborted due to timeout TCPSACKDiscard: 8 TCPDSACKIgnoredOld: 90 TCPDSACKIgnoredNoUndo: 47884 TCPSpuriousRTOs: 1465 TCPSackShifted: 119 TCPSackMerged: 59161 TCPSackShiftFallback: 102207 TCPRetransFail: 3221 TCPRcvCoalesce: 3986862 TCPOFOQueue: 1992704 TCPOFOMerge: 1201 TCPChallengeACK: 7148 TCPSYNChallenge: 6698 TCPSpuriousRtxHostQueues: 200822 IpExt: InTruncatedPkts: 8 OutMcastPkts: 29 InBcastPkts: 77435 InOctets: 44003287879 OutOctets: 13535788671 OutMcastOctets: 4671 InBcastOctets: 11413468 InNoECTPkts: 72606157 InECT1Pkts: 559 InECT0Pkts: 1870 InCEPkts: 11692
Virtualna, lokalna maszyna (też bez p2p)
valhalla ~ # uname -a && uptime Linux valhalla.org.pl 3.12.13-gentoo #1 SMP Sat Apr 26 19:35:08 CEST 2014 x86_64 Intel(R) Xeon(R) CPU L5520 @ 2.27GHz GenuineIntel GNU/Linux 16:58:19 up 22 days, 21:05, 3 users, load average: 0,00, 0,01, 0,05
valhalla ~ # netstat -s Ip: 73428 total packets received 0 forwarded 0 incoming packets discarded 73356 incoming packets delivered 18495 requests sent out Icmp: 8 ICMP messages received 0 input ICMP message failed. ICMP input histogram: destination unreachable: 8 0 ICMP messages sent 0 ICMP messages failed ICMP output histogram: IcmpMsg: InType3: 8 Tcp: 34 active connections openings 15 passive connection openings 0 failed connection attempts 2 connection resets received 2 connections established 26992 segments received 18213 segments send out 0 segments retransmited 0 bad segments received. 4 resets sent Udp: 73 packets received 0 packets to unknown port received. 0 packet receive errors 292 packets sent 0 receive buffer errors 0 send buffer errors UdpLite: TcpExt: 3 packets pruned from receive queue because of socket buffer overrun 29 TCP sockets finished time wait in fast timer 314 delayed acks sent Quick ack mode was activated 32 times 5066 bytes directly in process context from backlog 14132 packet headers predicted 4 packets header predicted and directly queued to user 744 acknowledgments not containing data payload received 7897 predicted acknowledgments TCPLossProbes: 1 27 packets collapsed in receive queue due to low socket buffer 32 DSACKs sent for old packets 1 DSACKs received 3 connections reset due to unexpected data TCPRcvCoalesce: 1220 TCPOFOQueue: 1282 TCPSpuriousRtxHostQueues: 1 IpExt: InNoRoutes: 2 InBcastPkts: 46283 InOctets: 28615977 OutOctets: 1836689 InBcastOctets: 6495920 InNoECTPkts: 73440
Stacjonarka natowana, CPU
[winnetou@localhost ~]$ egrep "model name|processor" /proc/cpuinfo processor : 0 model name : Intel(R) Xeon(R) CPU L5520 @ 2.27GHz processor : 1 model name : Intel(R) Xeon(R) CPU L5520 @ 2.27GHz processor : 2 model name : Intel(R) Xeon(R) CPU L5520 @ 2.27GHz processor : 3 model name : Intel(R) Xeon(R) CPU L5520 @ 2.27GHz processor : 4 model name : Intel(R) Xeon(R) CPU L5520 @ 2.27GHz processor : 5 model name : Intel(R) Xeon(R) CPU L5520 @ 2.27GHz processor : 6 model name : Intel(R) Xeon(R) CPU L5520 @ 2.27GHz processor : 7 model name : Intel(R) Xeon(R) CPU L5520 @ 2.27GHz
RAM
[winnetou@localhost ~]$ free -tom total used free shared buffers cached Mem: 12083 11819 264 382 166 4304 Swap: 0 0 0 Total: 12083 11819 264
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winnetou -- bez p2p masz: 2,166,735 połączeń z czego nieudanych 352,094? xD
Mi prąd wyłączyli i moje 12h statystyki szlag trafił. W każdym razie z tego co tam patrzyłem na te 2h przed, to miałem tam około 1mln połączeń, z czego 800-900tyś nieudanych. xD
Tak sobie wrzuciłem na watch tego netstata i widzę, że te nieudane połączenia wskakują w tempie jakimś 5/s W każdym razie zrobiłem krótki zrzut (p2p):
$ netstat -s Ip: 87537 total packets received 0 forwarded 0 incoming packets discarded 85495 incoming packets delivered 113075 requests sent out 208 outgoing packets dropped 1 dropped because of missing route 2 fragments received ok 4 fragments created Icmp: 3062 ICMP messages received 492 input ICMP message failed. ICMP input histogram: destination unreachable: 3017 timeout in transit: 44 echo replies: 1 99 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 98 echo request: 1 IcmpMsg: InType0: 1 InType3: 3017 InType11: 44 OutType3: 98 OutType8: 1 Tcp: 7880 active connections openings 180 passive connection openings 3243 failed connection attempts 261 connection resets received 19 connections established 27800 segments received 35624 segments send out 7871 segments retransmited 52 bad segments received. 584 resets sent Udp: 54583 packets received 31 packets to unknown port received. 0 packet receive errors 72947 packets sent UdpLite: TcpExt: 560 TCP sockets finished time wait in fast timer 441 delayed acks sent 2 delayed acks further delayed because of locked socket Quick ack mode was activated 177 times 68 packets directly queued to recvmsg prequeue. 1460 bytes directly in process context from backlog 13878 bytes directly received in process context from prequeue 8318 packet headers predicted 23 packets header predicted and directly queued to user 6382 acknowledgments not containing data payload received 3706 predicted acknowledgments 330 times recovered from packet loss by selective acknowledgements Detected reordering 1 times using FACK 4 congestion windows recovered without slow start by DSACK 82 congestion windows recovered without slow start after partial ack TCPLostRetransmit: 16 27 timeouts after SACK recovery 9 timeouts in loss state 455 fast retransmits 4 forward retransmits 34 retransmits in slow start 3444 other TCP timeouts TCPLossProbes: 189 TCPLossProbeRecovery: 46 25 SACK retransmits failed 145 DSACKs sent for old packets 75 DSACKs received 30 connections reset due to unexpected data 159 connections reset due to early user close 23 connections aborted due to timeout TCPDSACKIgnoredNoUndo: 45 TCPSpuriousRTOs: 34 TCPSackShifted: 2 TCPSackMerged: 659 TCPSackShiftFallback: 1255 TCPRetransFail: 428 TCPRcvCoalesce: 1794 TCPOFOQueue: 108 TCPChallengeACK: 66 TCPSYNChallenge: 61 IpExt: InMcastPkts: 1325 OutMcastPkts: 1862 InBcastPkts: 503 OutBcastPkts: 81 InOctets: 17277718 OutOctets: 70277587 InMcastOctets: 216405 OutMcastOctets: 303255 InBcastOctets: 144169 OutBcastOctets: 13365 InNoECTPkts: 87343 InECT0Pkts: 58 InCEPkts: 136
A tu dla porównania (również krótki log) bez p2p:
morfik:~$ netstat -s Ip: 71941 total packets received 0 forwarded 0 incoming packets discarded 71694 incoming packets delivered 41379 requests sent out 1 dropped because of missing route Icmp: 15 ICMP messages received 0 input ICMP message failed. ICMP input histogram: destination unreachable: 14 echo replies: 1 55 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 54 echo request: 1 IcmpMsg: InType0: 1 InType3: 14 OutType3: 54 OutType8: 1 Tcp: 510 active connections openings 72 passive connection openings 0 failed connection attempts 5 connection resets received 12 connections established 69265 segments received 38786 segments send out 95 segments retransmited 23 bad segments received. 203 resets sent Udp: 2413 packets received 1 packets to unknown port received. 0 packet receive errors 2415 packets sent UdpLite: TcpExt: 205 TCP sockets finished time wait in fast timer 251 delayed acks sent 1 delayed acks further delayed because of locked socket Quick ack mode was activated 154 times 44 packets directly queued to recvmsg prequeue. 1495 bytes directly in process context from backlog 15663 bytes directly received in process context from prequeue 58145 packet headers predicted 20 packets header predicted and directly queued to user 1227 acknowledgments not containing data payload received 577 predicted acknowledgments 3 times recovered from packet loss by selective acknowledgements 4 congestion windows recovered without slow start by DSACK 4 congestion windows recovered without slow start after partial ack 1 timeouts in loss state 3 fast retransmits 45 other TCP timeouts TCPLossProbes: 77 TCPLossProbeRecovery: 50 115 DSACKs sent for old packets 89 DSACKs received 10 connections reset due to unexpected data 3 connections reset due to early user close 2 connections aborted due to timeout TCPDSACKIgnoredNoUndo: 39 TCPSackShiftFallback: 15 TCPRetransFail: 3 TCPRcvCoalesce: 15711 TCPOFOQueue: 4249 TCPChallengeACK: 23 TCPSYNChallenge: 23 IpExt: InBcastPkts: 191 InOctets: 97616878 OutOctets: 2931945 InBcastOctets: 59210 InNoECTPkts: 71941
Jak widać liczba prób połączeń oraz retransmisji pakietów drastycznie zmalała.
Może to NAT przy torrencie tak niszczy te połączenia? Może to wina ipseta i czarnych list?
Ostatnio edytowany przez morfik (2014-05-19 18:21:21)
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Morfik - na 35di uptimu to i tak nie dużo tym bardziej, że "sporo zwiedzam" i kompa też do roboty wkorzystuje.
to daje jakieś 60tyś połączeń na dobę więc nie jest tak źle ;)
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AP jako wyjdzie na zewnątrz.
20:17:08 up 14 days, 22:45, 1 user, load average: 0,08, 0,03, 0,05
net.core.rmem_default = 163840 net.core.rmem_max = 163840 net.core.wmem_default = 163840 net.core.wmem_max = 163840 net.ipv4.tcp_mem = 10383 13847 20766 net.ipv4.tcp_rmem = 4096 87380 3545024 net.ipv4.tcp_wmem = 4096 16384 3545024 net.ipv4.udp_rmem_min = 4096 net.ipv4.udp_wmem_min = 4096 vm.lowmem_reserve_ratio = 32
Ip: 17343982 total packets received 0 forwarded 0 incoming packets discarded 17321004 incoming packets delivered 15893455 requests sent out Icmp: 1727 ICMP messages received 1550 input ICMP message failed. ICMP input histogram: destination unreachable: 1672 echo requests: 53 echo replies: 2 191 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 189 echo request: 2 IcmpMsg: InType0: 2 InType3: 1672 InType8: 53 OutType3: 189 OutType8: 2 Tcp: 23000 active connections openings 513 passive connection openings 2466 failed connection attempts 530 connection resets received 3 connections established 17225920 segments received 15781570 segments send out 54092 segments retransmited 219 bad segments received. 967 resets sent Udp: 2862238 packets received 12 packets to unknown port received. 14558 packet receive errors 1338849 packets sent UdpLite: TcpExt: 54 invalid SYN cookies received 179 resets received for embryonic SYN_RECV sockets 5479 TCP sockets finished time wait in fast timer 1264 packets rejects in established connections because of timestamp 181019 delayed acks sent 2379 delayed acks further delayed because of locked socket Quick ack mode was activated 14619 times 4 SYNs to LISTEN sockets dropped 1915 packets directly queued to recvmsg prequeue. 10151273 bytes directly in process context from backlog 15952934 bytes directly received in process context from prequeue 11106982 packet headers predicted 18028 packets header predicted and directly queued to user 338546 acknowledgments not containing data payload received 4185168 predicted acknowledgments 1215 times recovered from packet loss by selective acknowledgements 1 bad SACK blocks received Detected reordering 1 times using time stamp 1 congestion windows partially recovered using Hoe heuristic 56 congestion windows recovered without slow start by DSACK 1550 congestion windows recovered without slow start after partial ack TCPLostRetransmit: 47 233 timeouts after SACK recovery 157 timeouts in loss state 1489 fast retransmits 260 forward retransmits 858 retransmits in slow start 17121 other TCP timeouts TCPLossProbes: 8436 TCPLossProbeRecovery: 3380 416 SACK retransmits failed 18009 DSACKs sent for old packets 219 DSACKs sent for out of order packets 2774 DSACKs received 6 DSACKs for out of order packets received 403 connections reset due to unexpected data 136 connections reset due to early user close 1601 connections aborted due to timeout TCPDSACKIgnoredOld: 1 TCPDSACKIgnoredNoUndo: 1545 TCPSpuriousRTOs: 501 TCPSackShiftFallback: 9969 TCPRetransFail: 3 TCPRcvCoalesce: 4125874 TCPOFOQueue: 614179 TCPOFOMerge: 122 TCPChallengeACK: 280 TCPSYNChallenge: 224 TCPSpuriousRtxHostQueues: 37 IpExt: InMcastPkts: 2133 OutMcastPkts: 187 InBcastPkts: 40813 InOctets: -1 OutOctets: -1 InMcastOctets: 414147 OutMcastOctets: 142910 InBcastOctets: 4783158 InNoECTPkts: 17343281 InECT0Pkts: 3 InCEPkts: 699
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Wychodzi na to, że taka ilość retransmisji i błędnych połączeń to norma w p2p, taką odpowiedź dostałem z forum qb:
Peers drop connections all the time, if they have broadcast a piece request and a peer other than your client fufills that request, connections that were made as 'optimistic' can be dropped.[/quote]
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Uptime - 35 dni, 24 GB RAM, łącze -> 1 Gbps/1 Gbps
netstat -s
Ip: 844120884 total packets received 4 with invalid headers 583 with invalid addresses 332360574 forwarded 0 incoming packets discarded 510790126 incoming packets delivered 656890111 requests sent out 3102461 outgoing packets dropped 2890 fragments dropped after timeout 51688182 reassemblies required 21385808 packets reassembled ok 6211 packet reassembles failed 92026111 fragments received ok 242126359 fragments created Icmp: 6019383 ICMP messages received 5948 input ICMP message failed. ICMP input histogram: destination unreachable: 6011863 timeout in transit: 6121 source quenches: 3 redirects: 371 echo requests: 926 echo replies: 14 timestamp request: 2 4519482 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 1339654 time exceeded: 4 redirect: 3178877 echo request: 19 echo replies: 926 timestamp replies: 2 IcmpMsg: InType0: 14 InType3: 6011863 InType4: 3 InType5: 371 InType8: 926 InType11: 6121 InType13: 2 OutType0: 926 OutType3: 1339654 OutType5: 3178877 OutType8: 19 OutType11: 4 OutType14: 2 Tcp: 296149 active connections openings 1985776 passive connection openings 6629 failed connection attempts 15695 connection resets received 17 connections established 78741253 segments received 79298835 segments send out 415912 segments retransmited 8595 bad segments received. 746945 resets sent Udp: 425208109 packets received 1386052 packets to unknown port received. 956077 packet receive errors 245229813 packets sent SndbufErrors: 93 UdpLite: TcpExt: 2 SYN cookies sent 12095 invalid SYN cookies received 6613 resets received for embryonic SYN_RECV sockets 62 packets pruned from receive queue because of socket buffer overrun 1384373 TCP sockets finished time wait in fast timer 1841 packets rejects in established connections because of timestamp 513886 delayed acks sent 2421 delayed acks further delayed because of locked socket Quick ack mode was activated 29706 times 2538415 packets directly queued to recvmsg prequeue. 217341973 bytes directly in process context from backlog 852713074 bytes directly received in process context from prequeue 52716791 packet headers predicted 1256036 packets header predicted and directly queued to user 7233761 acknowledgments not containing data payload received 6749857 predicted acknowledgments 27 times recovered from packet loss due to fast retransmit 23914 times recovered from packet loss by selective acknowledgements 12 bad SACK blocks received Detected reordering 81 times using FACK Detected reordering 688 times using SACK Detected reordering 1 times using reno fast retransmit Detected reordering 461 times using time stamp 841 congestion windows fully recovered without slow start 4418 congestion windows partially recovered using Hoe heuristic 18681 congestion windows recovered without slow start by DSACK 9874 congestion windows recovered without slow start after partial ack 39275 TCP data loss events TCPLostRetransmit: 1474 20 timeouts after reno fast retransmit 2613 timeouts after SACK recovery 882 timeouts in loss state 45187 fast retransmits 17604 forward retransmits 11989 retransmits in slow start 321468 other TCP timeouts 3 classic Reno fast retransmits failed 1000 SACK retransmits failed 7331 packets collapsed in receive queue due to low socket buffer 40243 DSACKs sent for old packets 12 DSACKs sent for out of order packets 154327 DSACKs received 63 DSACKs for out of order packets received 8350 connections reset due to unexpected data 170 connections reset due to early user close 3197 connections aborted due to timeout TCPSACKDiscard: 3 TCPDSACKIgnoredOld: 349 TCPDSACKIgnoredNoUndo: 11022 TCPSpuriousRTOs: 307 TCPSackShiftFallback: 484741 TCPDeferAcceptDrop: 1866701 TCPReqQFullDoCookies: 2 TCPChallengeACK: 593 TCPSYNChallenge: 22 IpExt: InMcastPkts: 22262 InBcastPkts: 40911 InOctets: 1816944879 OutOctets: 908093156 InMcastOctets: 712384 InBcastOctets: 4386559
sysctl -a | egrep -i "rmem|wmem|tcp_mem"
vm.lowmem_reserve_ratio = 256 256 32 net.core.wmem_max = 131071 net.core.rmem_max = 131071 net.core.wmem_default = 229376 net.core.rmem_default = 229376 net.ipv4.tcp_mem = 581208 774945 1162416 net.ipv4.tcp_wmem = 4096 16384 4194304 net.ipv4.tcp_rmem = 4096 87380 6291456 net.ipv4.udp_rmem_min = 4096 net.ipv4.udp_wmem_min = 4096
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lewyx84 -- jak na 1 gbit to masz trochę dziwne ustawienia buforów i pamięci. Z tego co sobie liczę, to przy 1gbit bufor powinien być gdzieś na poziomie 5,242,880 bajtów -- tyle minimum musi być przypisane do połączenia, by mogło ono przesyłać dane z prędkością 1gbit/s, przynajmniej przy opóźnieniach rzędu 20ms -- a tam masz 4,194,304 i 6,291,456 bajtów. Jeśli opóźnienie wzrośnie (nie wiem jakie tam masz) ale spokojnie można założyć 2-3 krotnie większe, to ten bufor powinien być 3x 5,242,880bajtów, czyli koło 16M aby obsłużyć ten 1gbit. A ty tam masz 4 i 6 dla pobierania i wysyłania, także nawet przy 20ms ten net ci nie pobierze danych z prędkością 1gbit/s. xD
Te wartości środkowe też się wydają nieco zbyt małe jak 24GiB ramu, no chyba że masz tam dziesiątki tyś połączeń, wtedy alokowanie nawet tych parudziesięciu kb na połączenie może przytłoczyć.
No i przy pamięci 24GiB, to 1,162,416 bajtów na połączenia przy 1gbit łączu, biorąc pod uwagę że 1 połączenie, by osiągnąć pełną przepustowość wymaga 5-16x tyle, wydaje się trochę śmieszne. xD
lewyx84 ten net ci osiąga ten 1gbit w obie strony? Chyba, że może ja coś tu źle liczę? Jak coś to poprawcie mnie. xD
Ostatnio edytowany przez morfik (2014-05-20 07:04:30)
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[quote=morfik]lewyx84 ten net ci osiąga ten 1gbit w obie strony?[/quote]
Nie mozesz osiagnac tych predkosci w praktyce. Nawet jak masz potezny sprzet, procesor i twardy dysk (min SSD) ktory zdazy zapisywac dane wysylane z wysoka predkoscia. RAM 24 GB jest "rozpusta" w tym wypadku.
Zalezy tez w czym liczysz. ATM czy IP.
* przeplyw ATM jest to calkowity przeplyw potrzebny do przekazu danych.
* przeplyw IP jest to przeplyw do transmisji potrzebnych danych.
50 Méga w ATM odjac ~ 20% = 40 Méga w IP.
Moze z tym sie lepiej zrozumiemy => http://iperf.fr/
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[quote=darius]Nie mozesz osiagnac tych predkosci w praktyce. Nawet jak masz potezny sprzet, procesor i twardy dysk (min SSD) ktory zdazy zapisywac dane wysylane z wysoka predkoscia. RAM 24 GB jest "rozpusta" w tym wypadku.[/quote]
Nie tylko SSD, wystarczy niewielka macierz żeby wysycić łącze eth 1Gbps, ja crosslinki 2Gbps bez problemu wysycam. Tym bardziej, że 125MB/s da się na wielu HDD osiągnąć przy liniowych operacjach.
Ostatnio edytowany przez qluk (2014-05-20 10:38:02)
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Ja tam zawsze wychodzę z założenia, że ramu nigdy za dużo, nawet jak masz te 24GiB to nic z tego się chyba i tak nie zmarnuje, najwyżej cache to wypełni.
A co do liczenia. To na necie sobie znalazłem info, że istnieje coś takiego jak TCP window, które odpowiada za przesłanie jakieś tam porcji danych bez potrzeby potwierdzania ich pakietami ACK. Im większe jest takie okno tym więcej można przepchnąć danych przez łącze, zakładając, że opóźnienie jest takie samo. Im większe są opóźnienia tym większy bufor jest potrzebny, bo więcej danych jest w drodze z punktu A do B. Jeśli są małe bufory maleje też wielkość okna i co za tym idzie prędkość przesyłu, bo maszyna przetwarza max tyle danych ile jest w buforze, a jeśli ten się wypełni, to automatycznie są zmniejszane okienka by spowolnić przesył pakietów i tym samym zasygnalizować drugiej stronie by przestała słać więcej danych, przynajmniej do czasu rozładowania bufora.
Zakładając, że dysponujemy łączem 40/40mbit oraz RTT w granicach 20ms, to możemy obliczyć bufor w taki sposób:
40 Mbps to 5,242,880 bajtów/s (40/8*1024*1024)
20ms to 0.02s
5242880*0.02=104858bajtów
To by było akceptowalne gdyby dane szły tylko w jedną stronę, ale przecie trzeba czekać na potwierdzenie ACK po wysłaniu jakiejś tam porcji danych w oknie. Jako, że dane idą w obie strony z mniej więcej takim samym opóżnieniem, to się dubluje te powyższą wartość i otrzymuje bufor dla połączenia o prędkości 40mbit/s o rozmiarze nieco ponad 200k bajtów. W innym wypadku, nie da rady osiągnąć tej prędkości, musiało by ewentualnie zostać zmniejszone RTT, na co lepiej nie liczyć w dzisiejszych czasach. xD Im wyższe są opóźnienia, tym większy bufor trzeba, by zachować transfer na stałym, granicznym dla łącza poziomie.
Ja oszacowałem sobie max RTT na wartość 3*standardowe RTT, czyli było by około 600k bajtów na bufor dla tego połączenia -- to jest ta 3 wartość w tcp_wmem i tcp_rmem . Tyle, że to jest na sztywno ustawiane dla każdego gniazda TCP, czyli jakbyśmy mieli 100 połączeń to każde z nich dostanie przydział ramu w wysokości 600k ale tylko w przypadku gdyby ta wartość była tam ustawiona na każdej z tych 3 pozycji. Na szczęście po to są te 3 wartości tam by bufor się mógł skalować w oparciu o dostępną ilość pamięci ram dla wszystkich połączeń, którą określa tcp_mem. I tam też są 3 wartości z których pierwsza to minimum ram pod wszystkie połączenia. Po osiągnięciu zaś drugiej wartości, pamięć ma być powoli odchudzana, czyli bufory mają być zmniejszane. Ostatnia wartość z kolei to max ile mogą połączenia zutylizować ramu i to jest graniczna wartość, której nie można przekroczyć. Czyli jak mamy do czynienia z jednym połączeniem, to po zajęciu 600k w pamięci osiągnie ono full przepustowości łącza. W przypadku gdy tych połączeń było by dużo, to bufory zostaną im zmniejszone i tym samym zostanie ograniczony transfer per connection.
Takie jest moje rozumienie tego mechanizmu. xD
Ostatnio edytowany przez morfik (2014-05-20 10:45:00)
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[quote=qluk]Nie tylko SSD, wystarczy niewielka macierz żeby wysycić łącze eth 1Gbps, ja crosslinki 2Gbps bez problemu wysycam. Tym bardziej, że 125MB/s da się na wielu HDD osiągnąć przy liniowych operacjach.[/quote]
Panowie, mam nadzieje, ze mowimy o tym samym i nie ma pomylki 1Gbit/s = 1000 Mbit/s ? [url=http://test-debit.free.fr/]Tutaj[/url] testuje na moim starym sprzecie szybkosc przeplywu (bez obciazen) i [b]image.iso 647 M[/b] ciagne w 12 sekund a [b]1048576.rnd 1.0G[/b] w 16 sekund. czyli wedlug Was co osiagam ? Komputer stacjonarny z 2006 roku.
Ostatnio edytowany przez darius (2014-05-20 14:50:17)
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