Hello, I have measured bandwidth between domU guest os and normal Linux which are connected using direct cable. Pentium D 930 (dual core) is used for Xen and Pentium 4 3.0Ghz is used for the Linux box. Also broadcom BCM5701 PCI-based gigabit Ethernet card is attached to Pentium D. When I enable TSO in netfront, I got 624 Mbps over TCP connection. But when I disable TSO, I got 651 Mbps. Repeated measurements shows the similar results. During the experiment, I see the CPU utilization using xentop. TSO off -> 60.1/34.8 (dom0/domU) TSO on -> 47.5/22.2 (dom0/domU) Is it possible to get this number? And is there any reasons for this situation? Thanks, Jae-Wan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel