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David Miller wrote: > From: Jesper Krogh <jesper@krogh.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@vger.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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