>> >> A good test is to let Windows boot and idle itself, then compare the >> process cpu time under the TIME+ column with model- 0 and model- 1. > >Will do. One that that I notice that I can't explain yet is as follows: > >When I boot windows + level-1, the point at which windows is running in 16 >bit real-mode in the very beginning (before the splashscreen comes up), we >seem to take a very large number of exits for instruction emulation. This >ends up being a little storm of activity for about 1 second or so. I am >not really sure why this happens with the new code and not with the old. >It doesnt seem to hurt anything other than extra CPU used. But its weird >nonetheless. > >> >> Since the vast majority of exits in the scenario are hitting the tpr, >> I'd be unsurprised if the time if 50% lower or so. > >Yeah, the new code essentially converts all those TPR exits to lightweight. >Nothing more, nothing less. I could be crazy, but my perception is the GUI >is *much* more responsive because of it, however. Windows draw very fast >and it actually seems usable. Whereas trunk+ACPI always feels sluggish. I >don't know of a good benchmark to run to see if there really is an >improvement, however. > - Since light exits are much faster then regular exits the performance change is noticeable :) - Don't use usb_device tablet option since it use polling and waists lots of cpu. - You can use pcmark05 benchmark.
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