[Xen-devel] Performances compare between PV domU & HVM domU & PV-on-HVM domU

[topperxin <topperxin@xxxxxxx>]

hi all

    As we all know, xen currently support these three types domU mode, and every mode has it's own features, such as:

        Advantages                 Disadvantages

   PV:  Good I/O performance        Have to modify the domU kernel

        Hardware Independent        Can't support windows

   

HVM: no need to modify kernel    not good at I/O performance

        support various OS include  Hardware dependent(VT)  

        linux, windows      

PV-on-HVM: Optimize the I/O           Have to transplant the pv               performance with pv drivers   drivers between various kernel           support various OS include    versions

        linux, windows                              

        1.Are the compare right? Or where can I get the more detailed performance compare given by the government? Specially, what about I/O performance between PV & PV-on-HVM???

         2.When I choose domU mode, what conditions should I care for?

         3.Is PV can use VT hardware technology?

         4.In future, which modes will become the main direction?

        Any reply will be appreciated, thanks a lot.                             

        

                             

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