>>> On Sun, May 13, 2007 at 8:38 AM, in message <[EMAIL PROTECTED]>, Avi Kivity <[EMAIL PROTECTED]> wrote: > Gregory Haskins wrote: >> The load- average on my system is about 1 while XP is idling. qemu seems to > be mostly at "0%" but will bounce up to 1% on occasion. Here is the output > of "top - b - p <qemu- pid>" over a few seconds: >> >> top - 09:17:45 up 16:58, 3 users, load average: 1.02, 0.86, 0.42 >> Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie >> Cpu(s): 0.1%us, 0.2%sy, 0.0%ni, 99.5%id, 0.1%wa, 0.0%hi, 0.1%si, > 0.0%st >> Mem: 3994704k total, 2018980k used, 1975724k free, 70996k buffers >> Swap: 2104472k total, 0k used, 2104472k free, 1148284k cached >> >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > >> 10359 ghaskins 15 0 598m 83m 75m S 0 2.1 1:37.87 qemu- system- >> x86 > >> > > 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. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
