Hi PMM, I agree we cannot predict real world performance based on performance on ARM fast models but if system A is performing better than system B no ARM fast model or QEMU then in real world system A will perform better than system B. Of-course in real world scale of difference in performance between system A and system B will differ. The previous announcement only proves that Xvisor ARM is relatively better than KVM ARM. Regards, --Anup On Sat, May 5, 2012 at 3:36 PM, Peter Maydell <peter.maydell at linaro.org>wrote: > 2012/5/5 Anup Patel <anup at brainfault.org>: > > This announcement is to show an apple to apple performance comparison > > between Xvisor ARM and KVM ARM running on VExpress-A15 Fast Model. > > I would strongly caution against trying to do any performance/timing > type tests if you're still running on the ARM Fast Model -- they are > not representative of performance characteristics on hardware > and you really can't draw any conclusions about real world > performance by timing things on a model. It's quite easy to get > into a situation where all you're measuring is "does my code happen > to do a lot of some perfectly reasonable operation which happens > to be hard and slow to implement for the model?". > > (Also, KVM for ARM is still under development and we haven't > yet made several of the obvious performance improvements like > in-kernel irqchip and timer support, so it's not really a very > useful thing to compare against yet.) > > -- PMM > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://lists.cs.columbia.edu/pipermail/android-virt/attachments/20120505/1c4c090c/attachment.html
