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Hi George, Tow months ago, we talked about how to reduce the scheduling latency for a specific VM which runs a mixed workload, where the boost mechanism can not works well. I have tried some methods to reduce the scheduling latency for some assumed latency-sensitive VMs and got some progress on it. Now I hope to make it on demand. That is to say, I hope to get the scheduler to determine the

Hi all, When I run the iperf benchmark to measure the TCP throughput between a physical machine and a VM, the TCP server which is a Xen VM crashed. Do you know what''s the problem of this bug? Thanks. [ 100.973027] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 100.973040] IP: [<ffffffff81455f16>] xennet_alloc_rx_buffers+0x166/0x350 [ 100.973050] PGD

Hi, Is anybody know the purpose of this method (xen_evtchn_do_upcall)? When I run a user level application involved in TCP receiving and the SoftIRQ for eth0 on the same CPU core, everything is OK. But if I run them on 2 different cores, there will be xen_evtchn_do_upcall() existing (maybe when the local_bh_disable<http://www.cs.fsu.edu/~baker/devices/lxr/http/ident?i=local_bh_disable>() or