Date: Sat, 21 Aug 2010 09:32:52 -0700 From: "Jason C. Wells" <jcw@speakeasy.net> To: perryh@pluto.rain.com Cc: freebsd-questions@freebsd.org Subject: Re: Typical Network Performance Message-ID: <4C6FFFB4.5020105@speakeasy.net> In-Reply-To: <4c5f8dc6.IUSZ/egsTlgYHE/G%perryh@pluto.rain.com> References: <4C55E4B5.7000201@speakeasy.net> <8627B125-F3BB-42B2-98CF-600E21A93A2D@hiwaay.net> <AANLkTi=g%2BBGLJRQfyz7v3dSQ6k%2BxNQzVEEnSBdxpJfGF@mail.gmail.com> <5628C9CD-0F16-4C0E-8B89-B4ECCA35C933@hiwaay.net> <4C5F7141.9030203@speakeasy.net> <4c5f8dc6.IUSZ/egsTlgYHE/G%perryh@pluto.rain.com>
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On 08/08/10 22:10, perryh@pluto.rain.com wrote: > "Jason C. Wells"<jcw@speakeasy.net> wrote: > >> By process of elimination (swap cables, swap ports, try different >> host pairs) I was able to discover that a single server on my home >> LAN was getting about 1.6% performance compared to other servers >> getting 94% >> > ... > >> What would be the next step to figuring out why this host's network >> performance is slow? >> > My next step would be to check whether this host and its hub/switch > port agree on speed and duplex -- occasionally some combination > of netcard phy and switch type gets the negotiation wrong. Duplex > mismatch, in particular, can have huge performance impact. > I needed a windows utility to connect to my switch. Instead I just added a realtek NIC to my server to replace the Marvell on-board NIC. After this, network load using 'nc' to pipe 1MiB gives 98% transfer rate. Even though I don't know what the problem was, I consider the problem solved. Thanks. Jason
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