Date: Wed, 11 Oct 2006 10:51:33 -0700 From: "Jack Vogel" <jfvogel@gmail.com> To: "Danny Braniss" <danny@cs.huji.ac.il> Cc: freebsd-hackers@freebsd.org, freebsd-net@freebsd.org Subject: Re: em blues Message-ID: <2a41acea0610111051r36ad7200gef868593e34c9331@mail.gmail.com> In-Reply-To: <E1GXeiv-0007hw-4u@cs1.cs.huji.ac.il> References: <E1GXeiv-0007hw-4u@cs1.cs.huji.ac.il>
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On 10/11/06, Danny Braniss <danny@cs.huji.ac.il> 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. You arent measuring em, you're measuring RELEASES on your hardware, is this a surprise on a P3, no. I still do 930ish Mb/s on a P4 with a PCI-E or PCI-X adaptors running 6.1, in fact can do that with a 4 port adaptor I believe. Regards, Jack
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