Hello, I've perceived that there is a performance issue when running netperf against 4 e1000 links connected end-to-end to another machine with 4 e1000 interfaces.
I have 2 4-port interfaces on my machine, but the test is just considering 2 port for each interfaces card. When I run netperf in just one interface, I get 940.95 * 10^6 bits/sec of transfer rate. If I run 4 netperf against 4 different interfaces, I get around 720 * 10^6 bits/sec. If I run the same test against 2 interfaces I get a 940 * 10^6 bits/sec transfer rate also, and if I run it against 3 interfaces I get around 850 * 10^6 bits/sec performance. I got this results using the upstream netdev-2.6 branch kernel plus David Miller's 7 NAPI patches set[1]. In the kernel 2.6.23.12 the result is a bit worse, and the the transfer rate was around 600 * 10^6 bits/sec. [1] http://marc.info/?l=linux-netdev&m=119977075917488&w=2 PS: I am not using a switch in the middle of interfaces (they are end-to-end) and the connections are independents. -- Breno Leitao <[EMAIL PROTECTED]> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
