Messages in this thread | | | Date | Mon, 19 Mar 2007 01:59:32 -0400 | From | Robin Humble <> | Subject | Re: [E1000-devel] 1000xf bus problem |
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On Mon, Mar 19, 2007 at 06:31:51AM +0100, Willy Tarreau wrote: >On Sun, Mar 18, 2007 at 11:20:09PM -0600, Robert Hancock wrote: >> Greg.Chandler@wellsfargo.com wrote: >> >lspci -v shows the message below, and I am moving files between systems, >> >{from RAMdisk to RAMdisk} on idle machines. >> >The transfer rate is concurrent with just under the max throughput >> >capable on a 64-bit/66Mhz PCI socket. >> >> I think you miscalculate, that bus can transfer 532 MB/sec, Gigabit >> Ethernet tops out at 125 MB/sec at absolute maximum and it's difficult >> to achieve that in practice. > >On TCP payload, you should achieve 118.66 * 10^6 bytes/s ~= 113 MB/s.
times 2 for full duplex. so a 32bit/33MHz bus = 132MB/s isn't enough for fdx, but anything more (64bit or 66MHz or both) should be fine.
cheers, robin
>This is what you should observe with FTP or netcat for instance. On >local networks, it is perfectly attainable, I do this every day. If you >are far from this, check both sides link status with ethtool, and ensure >that you do not have wiring problems. It is usually very easy to fill the >wire with an e1000. > >Also, it would be interesting to check the other side. What card does it >have, what bus, what driver ? And what software or tests are you using >to conclude that you're limited by the bus ? > >Regards, >Willy > > >------------------------------------------------------------------------- >Take Surveys. Earn Cash. Influence the Future of IT >Join SourceForge.net's Techsay panel and you'll get the chance to share your >opinions on IT & business topics through brief surveys-and earn cash >http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >_______________________________________________ >E1000-devel mailing list >E1000-devel@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/e1000-devel - 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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