Hi, I mostly agree with everything said, but I'd like to add some thoughts tp the pot.
I think it's important to understand that that a product that coverts clusters to virtual MP could be designed with different requirements in mind. We are working on a research project that represents cluster as a NUMA machine. This is enough for a NUMA aware OS and performace is not bad. If we were to make a regular SMP, it would probably not work as well. I am not a Mosix guy, but I would think that installing QEMU on OM will solve nothing. It will only shift problems to be addressed at a different layer. Maybe I am wrong Sincerely, Igor. > In the applications, probably very independent. In the kernel, highly > dependent: different CPUs may access shared data structures *and* protect > them with spinlocks. As Paul said in a separate mail, spinlocks are going to > be way more expensive in this sort of distributed environment. > > All that being said, a company called "Virtual Iron" has got a > fully-virtualising solution that presents an SMP to the guest OS but actually > distributes computation across a cluster. I have yet to see the product > itself - no idea when it'll be released. It also sounds *really* difficult > to make go fast but at least suggests this sort of thing can perform > reasonably for some workloads. > > Cheers, > Mark _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
