Le Sat, 5 Feb 2011 14:35:52 -0500 (EST) vous Ãcriviez: > No single component is < 1Gbyte/sec but when data is transferred from > hostA to hostB, then it degrades to 250MiB/s. Running 2 Supermicro H8-DIi+ with 2378 Opteron, Intel 10 GigE CX4, 3Ware RAID-6 24 drives : 550 MB/s reading sustained over NFS with 2.6.32.* (plain vanilla kernel). I know that Xeon used to suck IO wise, but this is surprising. Isn't something preventing DMA ? -- ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | <eflorac@xxxxxxxxxxxxxx> | +33 1 78 94 84 02 ------------------------------------------------------------------------ -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html