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Message-ID: <4824C936.9000103@krogh.cc> Date: Fri, 09 May 2008 23:59:18 +0200 From: Jesper Krogh <jesper@...gh.cc> To: David Miller <davem@...emloft.net> CC: yhlu.kernel@...il.com, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: NIU - Sun Neptune 10g - Transmit timed out reset (2.6.24) David Miller wrote: > From: Jesper Krogh <jesper@...gh.cc> > Date: Fri, 09 May 2008 20:32:53 +0200 > >> When it works I doesnt seem to be able to get it pass 500MB/s. > > With this card you really need multiple cpus and multiple threads > sending data through the card in order to fill the 10Gb pipe. > > Single connections will not fill the pipe. The server is a Sun X4600 with 8 x dual-core CPU's, setup with 64 NFS-threads. The other end of the fiber goes into a switch with gigabit ports connected to 48 dual-core cpus. The test was done doing a dd on a 4.5GB file from the server to /dev/null on the clients. The number of contextswitches seems enourmous.. over 120.000 sometimes. When transmitting around the same amount of data (4xgigabit bonded with 802.3ad) 4x110MB/s the amount of contextswitches only reaches 3-4.000. I have no idea if this has any relevance. Should this setup not be able to fill the pipe? -- Jesper -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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