Messages in this thread |  | | From | Ricardo Ferreira <> | Subject | Poor 8139 network card performance when sharing IRQ | Date | Sun, 30 Sep 2001 17:05:25 +0100 |
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I have a dual p3-1Ghz on a Abit VP6 board. Everything is working well except the network card. I have some nfs mounts and i'm using 4096 wsize and rsize for performance. However when eth0 and any other card are sharing an IRQ the result of a ping to the server with a packetsize of 4096 is this:
$ ping -s 4096 fs PING loki.internal (192.168.0.40): 4096 data bytes 4104 bytes from 192.168.0.40: icmp_seq=0 ttl=255 time=1.6 ms 4104 bytes from 192.168.0.40: icmp_seq=1 ttl=255 time=283.5 ms 4104 bytes from 192.168.0.40: icmp_seq=2 ttl=255 time=755.3 ms 4104 bytes from 192.168.0.40: icmp_seq=3 ttl=255 time=2.1 ms 4104 bytes from 192.168.0.40: icmp_seq=4 ttl=255 time=1.6 ms 4104 bytes from 192.168.0.40: icmp_seq=5 ttl=255 time=2.1 ms 4104 bytes from 192.168.0.40: icmp_seq=6 ttl=255 time=1.8 ms 4104 bytes from 192.168.0.40: icmp_seq=7 ttl=255 time=284.1 ms 4104 bytes from 192.168.0.40: icmp_seq=8 ttl=255 time=2.0 ms 4104 bytes from 192.168.0.40: icmp_seq=9 ttl=255 time=284.4 ms 4104 bytes from 192.168.0.40: icmp_seq=10 ttl=255 time=2.0 ms 4104 bytes from 192.168.0.40: icmp_seq=11 ttl=255 time=2.2 ms 4104 bytes from 192.168.0.40: icmp_seq=12 ttl=255 time=754.9 ms 4104 bytes from 192.168.0.40: icmp_seq=13 ttl=255 time=283.7 ms 4104 bytes from 192.168.0.40: icmp_seq=14 ttl=255 time=391.9 ms
--- loki.internal ping statistics --- 15 packets transmitted, 15 packets received, 0% packet loss round-trip min/avg/max = 1.6/203.5/755.3 ms
... but if i remove the other card (in this case a Miro Video TV Card) the ping times all drop to about 2ms.
Is this drop in performance normal or is it a bug ? As an aside, anything lower than 1024 packetsize doesn't slowdown.
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