em blues

[Mike Tancsa]

On Wed, 11 Oct 2006 16:06:17 +0200, in sentex.lists.freebsd.net you
wrote:

>the box is a bit old (Intel Pentium III (933.07-MHz 686-class CPU)
>dual cpu.
>
>running iperf -c (receiving):
>
>freebsd-4.10	0.0-10.0 sec    936 MBytes    785 Mbits/sec
>freebsd-5.4	0.0-10.0 sec    413 MBytes    346 Mbits/sec
>freebsd.6.1	0.0-10.0 sec    366 MBytes    307 Mbits/sec
>freebsd-6.2	0.0-10.0 sec    344 MBytes    289 Mbits/sec
>
>btw, iperf -s (xmitting) is slightly better
>freebsd-4.10	0.0-10.0 sec    664 MBytes    558 Mbits/sec
>freebsd-5.4	0.0-10.0 sec    390 MBytes    327 Mbits/sec
>freebsd-6.1	0.0-10.0 sec    495 MBytes    415 Mbits/sec
>freebsd-6.2	0.0-10.0 sec    487 MBytes    408 Mbits/sec
>
>so, it seems that as the release number increases, the em
>throughput gets worse - or iperf is.

Hi,
	What is your setup for testing ?  For me, with a couple of em
NICs back to back I get

 iperf -c 1.1.1.2
------------------------------------------------------------
Client connecting to 1.1.1.2, TCP port 5001
TCP window size: 32.5 KByte (default)
------------------------------------------------------------
[  3] local 1.1.1.1 port 57584 connected with 1.1.1.2 port 5001
[  3]  0.0-10.0 sec  1.06 GBytes    914 Mbits/sec

6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #0: Mon Oct  9 23:22:10 EDT 2006

One is a Pentium(R) 4 CPU 3.00GHz and the other an AMD 3800 X2

Going the other way is about the same (900Mb)

	---Mike

>
>danny
>
>
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--------------------------------------------------------
Mike Tancsa, Sentex communications http://www.sentex.net
Providing Internet Access since 1994
mike at sentex.net, (http://www.tancsa.com)