Avi Kivity wrote: > Anthony Liguori wrote: >>> >>> >>> Have a look at user/test/x86/vmexit.c, which does exactly that. >>> >>> >> >> That only gives you the combined count of a vmenter and vmexit. > > Right; furthermore it measures kvm overhead and not just instruction > latency.
True. Also, I don't know what Dan is looking to measure, but the cost of vmexits will varying depending on the reason for exit. vmexit.c uses cpuid() which I suspect is slower than vmexit or pio but faster than pf. It would be interesting to measure the individual exit reasons. Regards, Anthony Liguori ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
