[tulip-bug] Very slow performance with FA310TX
Sun, 24 Sep 2000 16:04:39 GMT
I am having problems with a Netgear FA310TX card. Transfer rates to/from the
machine using this card are abysmally slow.
My configuration is as follows: 2.2.17 kernel with tulip.o module, machine
is a dual-pentium SMP machine and I'm running the SMP kernel. The test
machine is connected to a Netgear FS105 switching hub (10/100). Other
machines connected to the hub include two Win98 and another Linux machine.
The hub indicates that the 310TX link is 100BT full duplex.
I tried the on-board AMD PCNet32 (10BT) ethernet controller and can ftp
to/from the test machine at about 850K/sec. I tried a 3Com 3C509 and get the
same result. With the FA310TX, I only get 50-300K/sec and the transfers
sometimes have long stalls before they resume. Everything *works* but it's
I don't think there is a hardware problem because I can pull the card and
put it in one of the Win98 machines and get about 5MB/sec with it on Windows
Networking. I don't think it's a limitation in the test machine because it
can consistently get ~800K/sec with a 10BT card, so it should be able to do
at least as well with a 100BT card.
I'm not even sure where to start looking for a problem since everything
works. The only hint that something might be wrong is under heavy load, the
310TX starts throwing a lot of frame errors:
eth1 Link encap:Ethernet HWaddr 00:A0:CC:39:B1:F9
inet addr:10.0.0.3 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:530996 errors:0 dropped:0 overruns:0 frame:5735
TX packets:495731 errors:1 dropped:0 overruns:1 carrier:0
Interrupt:10 Base address:0xfe00
Under light load, no frame errors.
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