Re: [Qemu-devel] [RFC 1/3] icount: base rt_clock on icount.

[Paolo Bonzini <pbonzini@redhat.com>]

Il 18/07/2013 18:23, Frederic Konrad ha scritto:
> On 18/07/2013 17:36, Paolo Bonzini wrote:
>> Il 18/07/2013 17:02, fred.konrad@greensocs.com ha scritto:
>>> From: KONRAD Frederic <fred.konrad@greensocs.com>
>>>
>>> This bases rt_clock on icount, as vm_clock.
>>> So vm_clock = rt_clock.
>>>
>>> Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
>>> ---
>>>   qemu-timer.c | 6 +++++-
>>>   1 file changed, 5 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/qemu-timer.c b/qemu-timer.c
>>> index b2d95e2..6c607e5 100644
>>> --- a/qemu-timer.c
>>> +++ b/qemu-timer.c
>>> @@ -401,7 +401,11 @@ int64_t qemu_get_clock_ns(QEMUClock *clock)
>>>         switch(clock->type) {
>>>       case QEMU_CLOCK_REALTIME:
>>> -        return get_clock();
>>> +        if (use_icount) {
>>> +            return cpu_get_icount();
>>> +        } else {
>>> +            return get_clock();
>>> +        }
>>>       default:
>>>       case QEMU_CLOCK_VIRTUAL:
>>>           if (use_icount) {
>>>
>> rt_clock is very little used in general.  You should use "-rtc clock=vm"
>> if you want to base the RTC on vm_clock.
>>
>> Paolo
> 
> True but it seems used in some place:
> 
> For example: ui/console.c:
> ds->gui_timer = qemu_new_timer_ms(rt_clock, gui_update, ds);
> 
> Maybe it can cause trouble no?

In theory it is only used in places where it shouldn't cause trouble
(those that do should use the similarly named rtc_clock variable).

Paolo