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Date:      Wed, 11 Oct 2006 16:06:17 +0200
From:      Danny Braniss <danny@cs.huji.ac.il>
To:        freebsd-hackers@FreeBSD.ORG
Cc:        freebsd-net@freebsd.org
Subject:   em blues
Message-ID:  <E1GXeiv-0007hw-4u@cs1.cs.huji.ac.il>

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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.

danny





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