Re: [Qemu-devel] emulation cycle number implementation

[Sergey Smolov <smolov@ispras.ru>]

On 07.09.2017 19:37, Peter Maydell wrote:
> On 7 September 2017 at 17:30, Sergey Smolov <smolov@ispras.ru> wrote:
>> I'm running MIPS assembler programs on QEMU. I need to log some events that
>> happen through emulation (writes to some registers, for example). When an
>> event happens, I need to print not only the event-related information, but
>> an "emulation cycle number" also. This number should be an integer
>> increasing value that is similar to real hardware clock.
>>
>> How to implement this in QEMU? May QEMU timers be helpful in solving such a
>> problem?
> You can use cpu_get_ticks(), though if we're not in icount mode
> you may find it doesn't behave quite as helpfully as you might like
> (in that case it roughly tracks host hardware cycles.)
>
> thanks
> -- PMM

Thank you, Peter!

But what if I like to track guest hardware cycles? I run the same 
program on QEMU and RTL model of MIPS microprocessor, and I want to 
compare simulation traces. I expect, that emulation will start from 0 
tick in both cases, at least.

-- 
Sincerely yours,
Sergey Smolov