< originally sent to linux-kernel by mistake :( > Hi Folks, I'm looking at a very weird problem here, and I was hoping somebody had seen this before. A friend has a network, two XP systems and two linux boxes on a gigabit switch all with Marvell Yukon-based cards in. XP->XP, he gets ~20MB/sec ,linux to linux is the same kind of rate using the sk98lin driver under 2.6.6. Jumbo frames are out as the switch doesn't support them. Bizarrely, however, he gets 20MB/sec reads from linux to XP, but 150KB/sec writes using either ftp or samba, unless he streams from the linux box using anything else on the network, in which case the bandwidth goes up, but not to the consistent 20MB/sec. This almost working state of affairs was arrived at after disabling PMTU discovery on the XP systems, but all the systems use the same MTU which is 1500 bytes. I've upped the rmem_max and wmem_max to 256kb each, but this doesn't seem to have helped. Has anybody seen this kind of behaviour, or got any ideas? Cheers, Eamonn -- "He's an immortal small-town boxer with a passion for fast cars. She's an artistic snooty vampire with an MBA from Harvard. They fight crime!" - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
