Massimo Dal Zotto <[EMAIL PROTECTED]> writes: > When qemu runs on an i386 cpu with speedstep enabled the clock of the > guest os is not in sync with the clock on the host os because the > vm_timer used for irq 0 generates interrupts at wrong rate when > the host cpu frequency changes. > > The following patch fixes the problem by adding a new option -no-tsc for > the i386 architecture which can be used to disable rdtsc when running on > a cpu with speedstep enabled.
Unfortunately this patch, effectively replacing a single assembly instruction by a gettimeofday() call, slows some operations down to a degree that makes a WinXP guest on GNU/Linux host nearly unusable at network and file system operations (at least here). - Heike _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
