[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Question about Virtual NIC I/O performance
On Thu, Nov 15, 2012 at 06:03:08PM +0800, topperxin wrote: > Hi all Hello, > Now I'm studying the Virtual NIC I/O performance, I have some > questions > 1: > For 1G NIC, such as Intel 82576, if I use pv driver as the VM NIC > driver, for the best case, > I can get a good performance, maybe 900M bps > So we can say the pv driver's performance is very good. > While when I use 10G NIC, such as Intel 82599, still use the pv > driver as the VM NIC driver, > the I/O performance is very bad, there is only 2G bps, the testing > environment is simple, one vm on one host. > So, may I draw a conclusion that PV driver not suitable for 10G > NIC? > You didn't provide enough information.. What Xen version? What dom0 kernel version? What domU kernel version? What Intel NIC driver version? How did you configure/tune your system/settings? > Who can tell me the reason! ? > 2: > For 10G NIC, Intel 82599, if I open the SR-IOV function, I can get > a good performance in the vm, > it's nearly to 9.2G bps > 3: > We all know AWS's EC2 instance are based on XEN. > I launched the instance which provide the 10G performance I/O > I tested and got the best performance the 6.3G bps > I checked the driver of the VM's NIC, it's PV driver, not the > SR-IOV > How does AWS can use PV driver on 10G NIC get 6.3G bps performance? > It's very good, I think > They've probably properly optimized and tuned the settings. -- Pasi > Any discussion are welcome > Best Regards > Lixin Niu > </d! iv> > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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