Hi, I''ve got 2 completly different machines serving as my dom0 machines: one VIA C3 machine (0.5GB RAM, 1GHz C3) and one P3 machine (1GB RAM, 800MHz, dual CPU). Each is connected to a shared firewire disk, the C3 via 1394a, the P3 via 1394b. On the dom0 in each machine I get about 20 resp. 45MB/s read performance which is what I expect from 1394a/b. In a domU which directly mounts the exported partitions I get the same values. So far so good. The problem starts when I have 2 domU running, one exporting a filesystem and the other one mounting it. dom0 is not involved in any way here, at least not directly. In the C3 case, I get about 10MB/s read performance. Which is a bit on the low side, but that''s not unexpected. However on the dual P3, where each domU can use one CPU for itself, I get 11MB/s. Now that is unexplainably slow. I get higher performance when I split both domU on one computer each (12MB/s resp. 16MB/s, interconnected via GBit Ethernet). Why is it that slow when running on one physical computer, even when that one has 2 CPUs and is capable of moving 45MB/s easily? I''m not using any iptables rules, no JumboFrames. Any idea why it''s that slow? Harald _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users