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Matheos Worku wrote: > Jesper Krogh wrote: > >> Matheos Worku wrote: >> >>> Jesper Krogh wrote: >>> >>>> 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. >>> >>> >>> >>> Are you doing a TX or RX (with respect to the 10G if)? >> >> >> >> Thats a transmit.. from the NFS server to the clients. > Is MSI/MSI-X enabled on the kernel? I have noticed that it was not enabled on Gutsy-SPARC? --Matheos > > I have observed TX throughput degradation (and increased CPU > utilization) occurs with increased # of connections, when CPU count > > 4 CPUs. I don't think it is related to the driver (or HW). A while > ago I prototyped a driver which drops all UDP TX packets and the > throughput degradation (and CPU utilization increase) behavior > occurred though the driver was not doing much work. LSO/TSO seems to > help with the situation though. With LSO disabled, I have observed the > issue on several 10G nics. > > Regards > Matheos > > >> >> 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/ -- 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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