tg3 (netgear 302t) performance numbers
After placing my Netgear 302t NICs into my SS50 P-IV (1.8Ghz) machine, they seem to work fine. (They had various problems in my AMD machines, but that could all just be coincidence and other, non-related, problems)
My test-bed has two of these NICs connected to each other via a cross-over cable. Both NICs are in the same machine...
Here are some performance numbers I see:
tcp/ip send + receive in user-space:
112Mbps on each port (does not count any packet over-head,
and my generator/receiver is not the fastest thing around)
pktgen (kernel pkt generator module):
60-byte packets, sending 1kpps in one direction, and maximum possible in the other. Was able to generate 122,000 packets-per-second. (A tulip 10/100 NIC can do 140kpps in this configuration) Average Latency: 22 micro-seconds.
0 dropped packets over 10+ minute run.
1514-byte packets, sending 1kpps in one direction, max possible in the other. 25.8kpps (310Mbps) in the fast direction.
Average Latency: 17 miliseconds (127 micro-seconds for the 1kpps direction) 2000 dropped pkts, 5.8 million sent during this test.
So, not too bad, probably the 32/33 PCI bus is most of the bottle-neck. The good part is, no errors or other strangnesses were seen with the driver.
Enjoy,
Ben
Signature · 3 lines
Ben Greear <[email protected]> <Ben_Greear AT excite.com> President of Candela Technologies Inc http://www.candelatech.com ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear
Quoted 6 lines · Ben Greear
pktgen (kernel pkt generator module):
60-byte packets, sending 1kpps in one direction, and maximum possible in the other. Was able to generate 122,000 packets-per-second. (A tulip 10/100 NIC can do 140kpps in this configuration) Average Latency: 22 micro-seconds.
0 dropped packets over 10+ minute run.
An update to this. This previous test, I was allocating a new skbuf each time. For pure pkt crunching (ie sending the same pkt over and over again), the throughput was more like 170kpps.
Signature · 3 lines
Ben Greear <[email protected]> <Ben_Greear AT excite.com> President of Candela Technologies Inc http://www.candelatech.com ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear