On Mon, Aug 29, 2005 at 10:01:39AM +0700, Mulyadi Santosa wrote: > Hello... > > > It simply > > replaces the virtual timer mechanism based on CPU tick count (which > > is totally messed up in a SpeedStep setting) with calls to the > > realtime clock. It should work even when emulation is stopped > > intermittently, I hope, since the built in "virtual clock stop" > > mechanism ist left unchanged. > > Hm..... hard choice.....correctness traded for perfomance.... But > anyway....IMHO this hack is needed for every speed-step enabled > machine. Perhaps...the other workaround is via cpufreqd? I don't have > any Pentium M based PC/laptop around, so this is just a pure guess >
The other patch for this just used a constant to increment the time iirc (based on some value in /proc). > BTW, your patch seems reversed....if you really mean you want to fetch > realtime clock, you should use "rdtsc", right? But the patch seems > replaced "rdtsc" with get_clock().... > The values returned by rdtsc seem to vary depending on cpu frequency when speedstep is enabled. get_clock() is actually more accurate (tho i think less precise), at least from the user land POV. -- Infinite complexity begets infinite beauty. Infinite precision begets infinite perfection. _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
