Messages in this thread | | | Date | Sun, 19 Sep 1999 04:42:52 +0000 | From | "Stephen D. WIlliams" <> | Subject | 1000ms delay in networking stack or driver, new bug? |
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I periodically notice that all or most network traffic is taking exactly 1000 ms. No matter where I check traffic, most roundtrips seem to take 1000ms. This includes pings, traceroutes, and apparently TCP traffic since connections are running very slowly. Downing/upping the interface cures the problem.
Note that I checked both remote and local servers. Local systems are on a hub. Remote servers are reached via an ISDN router, a ACC Congo Voice/data router, that performs NAT and dhcp server.
I notice this most clearly on my laptop but I believe I may have seen symtoms of this on other servers.
The laptop is a PII 266, Enpower ENP-802 (Chicony OEM).
Ethernet/pcmcia log:
Sep 18 15:48:45 sdwlap cardmgr[695]: socket 1: D-Link DMF560TX Ethernet/Modem Sep 18 15:48:45 sdwlap cardmgr[695]: executing: 'insmod /lib/modules/2.2.13pre6/net/8390.o' Sep 18 15:48:45 sdwlap cardmgr[695]: executing: 'insmod /lib/modules/2.2.13pre6/pcmcia/pcnet_cs.o mem_speed=600' Sep 18 15:48:46 sdwlap cardmgr[695]: executing: 'insmod /lib/modules/2.2.13pre6/pcmcia/serial_cs.o' Sep 18 15:48:46 sdwlap kernel: eth0: NE2000 Compatible: io 0x320, irq 3, hw_addr 00:E0:98:17:3D:B5 Sep 18 15:48:46 sdwlap kernel: tty02 at 0x03e8 (irq = 3) is a 8250
Kernel 2.2.13pre6 obviously with only my ARP send filter patch.
eth0 Link encap:Ethernet HWaddr 00:E0:98:17:3D:B5 inet addr:208.213.203.10 Bcast:208.213.203.255 Mask:255.255.255.0 UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1 RX packets:10084 errors:0 dropped:0 overruns:0 frame:0 TX packets:7824 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 Interrupt:3 Base address:0x320 Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 208.213.203.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 0.0.0.0 208.213.203.33 0.0.0.0 UG 0 0 0 eth0
Symtoms:traceroute to lig.net (204.248.145.100), 30 hops max, 40 byte packets 1 * * 207.172.77.5 871.977 ms 2 10.65.18.11 2998.584 ms 931.269 ms 2998.004 ms 3 * * * 4 * * * 5 207.172.0.4 4529.751 ms * 207.172.0.132 1000.583 ms 6 207.172.9.250 999.863 ms 207.172.19.26 1000.424 ms 207.172.9.42 999.178 ms 7 207.172.9.222 999.905 ms 207.172.9.226 999.888 ms 207.172.9.222 999.792 ms 8 209.8.128.13 1000.270 ms 999.429 ms 1000.110 ms 9 209.8.159.42 999.657 ms 999.800 ms 999.982 ms 10 * * * 11 * 144.232.7.185 1000.278 ms * 12 144.232.8.205 1010.583 ms * * 13 144.232.9.150 2240.618 ms * * 14 144.232.10.158 1709.202 ms 1001.218 ms 999.952 ms 15 144.228.50.9 1009.911 ms 999.803 ms 1001.173 ms 16 144.228.59.6 1008.917 ms * 1000.069 ms 17 * * * ifconfig eth0 down ifconfig eth0 up route add -net default gw 208.213.203.33
[root@sdwlap /root]# traceroute -n lig.net traceroute: Warning: lig.net has multiple addresses; using 204.248.145.1 traceroute to lig.net (204.248.145.1), 30 hops max, 40 byte packets 1 207.172.77.5 37.178 ms 40.772 ms 37.632 ms 2 10.65.18.11 37.395 ms 32.712 ms 32.651 ms 3 10.65.18.1 35.721 ms 34.343 ms 32.651 ms 4 10.2.3.42 43.974 ms 52.421 ms 44.080 ms 5 207.172.0.9 47.284 ms 207.172.0.4 42.462 ms 207.172.0.137 65.451 ms 6 207.172.9.250 70.239 ms 47.614 ms 207.172.19.26 53.798 ms 7 207.172.9.222 46.258 ms 207.172.9.226 48.392 ms 207.172.9.222 45.808 ms 8 209.8.128.13 45.638 ms 47.446 ms 47.476 ms 9 209.8.159.42 55.506 ms 50.730 ms 47.489 ms 10 144.228.128.5 52.198 ms 49.107 ms 50.757 ms 11 144.232.7.185 48.945 ms 50.728 ms 52.410 ms 12 144.232.8.205 52.204 ms 54.040 ms 52.380 ms 13 144.232.9.150 71.928 ms 71.044 ms 68.203 ms 14 144.232.10.158 81.769 ms 72.051 ms 75.447 ms 15 144.228.50.9 78.464 ms 75.352 ms 70.502 ms 16 144.228.59.6 176.991 ms 168.879 ms 80.306 ms 17 204.248.145.1 85.049 ms 83.562 ms 93.464 ms
sdw
-- OptimaLogic - Finding Optimal Solutions Web/Crypto/OO/Unix/Comm/Video/DBMS sdw@lig.net Stephen D. Williams Senior Consultant/Architect http://sdw.st 43392 Wayside Cir,Ashburn,VA 20147-4622 703-724-0118W 703-995-0407Fax 5Jan1999
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