Dor Laor wrote: > On Wed, 2008-03-05 at 19:30 +0200, Avi Kivity wrote: > >> >> Playing a movie is better than any benchmark; it reflects actual user >> experience in a real and important use case. Benchmarks are substitutes >> for real use cases, not the goal of the optimization. >> >> > > I forgot to mention that the benchmark is measuring time drift in the > guest. Playing a movie in winxp changes the guest clock frequency from > 100HZ to 1000HZ, thus causing a 250HZ host to coalesce pit irqs. > > So good pic & pit combination can handle guest multimedia without drifts > while insufficient implementation just can't. >
I'll try out these patches in the next day or so. Is the expectation that Standard HAL + in-kernel APIC/PIT will have smoother playback than ACPI HAL w/o in-kernel APIC/PIT? I presume that the ACPI HAL is unaffected by in-kernel PIT? Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/kvm-devel
