Re: [Qemu-devel] [PATCH 2/2] [RFC] time: refactor QEMU timer to use GHRTimer

[Paolo Bonzini <pbonzini@redhat.com>]

On 08/22/2011 09:21 PM, Anthony Liguori wrote:
> -        ticks = cpu_get_real_ticks();
> -        if (timers_state.cpu_ticks_prev > ticks) {
> -            /* Note: non increasing ticks may happen if the host uses
> -               software suspend */
> -            timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks;
> -        }
> +        ticks = get_clock();
>
> [...]
>
> -static inline int64_t cpu_get_real_ticks(void)
> -{
> -    int64_t val;
> -    asm volatile ("rdtsc" : "=A" (val));
> -    return val;
> -}
> -

cpu_get_ticks is used also to emulate the guest TSC, are you sure you 
want to change that uniformly to a 1 GHz rate?

I had some more cleanups in this area, I'll try to get them tested and 
submitted but I have little time for this right now.

Paolo