On Tue, 2008-02-19 at 17:14 -0500, Tony Battersby wrote: > > Update: when I revert Herbert's patch in addition to applying your > patch, the iSCSI performance goes back up to 115 MB/s again in both > directions. So it looks like turning off SG for TX didn't itself cause > the performance drop, but rather that the performance drop is just > another manifestation of whatever bug is causing the data corruption. > > I do not regularly use wireshark or look at network packet dumps, so I > am not really sure what to look for. Given the above information, do > you still believe that there is value in examining the packet dump? >
Can you confirm whether you're getting TCP checksum errors on the other side that is receiving packets from the 5701? You can just check statistics using netstat -s. I suspect that after we turn off SG, checksum is no longer offloaded and we are getting lots of TCP checksum errors instead that are slowing the performance. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
