> code (a) : for (int i = 0; i< 100; i++) c[i] = a[i] * b[i];
>
> code (b) : for (int i = 0; i< 1000; i++) for(int j = 0; j < b[i]; j++)
> c[i] += a[i];
>
> code (c) : for (int i = 0; i< 1000; i++) c[i] = HW_MUL(a[i], b[i]);
>
> I'm sure that code (b) will execute much longer that code (a) ins
En/na Paul Brook ha escrit:
> On Monday 16 April 2007 15:41, Marius Monton wrote:
>
>>> Any benchmark/performance measurements you make inside qemu are
>>> meaningless. qemu performance bears no relation whatsoever to the
>>> performance characteristics of real hardware.
>>>
>> That's t
Hi,
I just tried with cpu_disable_ticks() and cpu_enable_ticks(). It seems to
work partially: at least now system date and time are out of sync..
Maybe a more accurate way to do this is mimicking "stop" and "continue"
monitor commands:
vm_stop(EXCP_INTERRUPT);
[SystemC simulation]
vm_start()
On Monday 16 April 2007 15:41, Marius Monton wrote:
> > Any benchmark/performance measurements you make inside qemu are
> > meaningless. qemu performance bears no relation whatsoever to the
> > performance characteristics of real hardware.
>
> That's true, and I don't care about it. I'd like to get
That's true, and I don't care about it. I'd like to get a method to
stop/start time inside qemu in order to simulate execution of large
pieces of hw out of qemu (look at qemu-systemc project).
If qemu is freeze meanwhile a systemc simulation is in progress
(simulating a HW device of system), time
Hi,
Paul Brook wrote:
qemu is not cycle accurate or even deterministic.
Is there anything that's cycle accurate at all?
Regards
Markus
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On Friday 29 December 2006 17:53, Màrius Montón wrote:
> Hi,
>
> As I understand, OSes running inside qemu "have" notion of time: (its
> date and time works, time(1) command works, etc.).
> My question is about how qemu manages time. I need to stop and start
> again this "virtual-time".
qemu doesn
Hi,
As I understand, OSes running inside qemu "have" notion of time: (its
date and time works, time(1) command works, etc.).
My question is about how qemu manages time. I need to stop and start
again this "virtual-time".
I just tried with cpu_disable_ticks() and cpu_enable_ticks(). It seems
to wo
On Friday 29 December 2006 16:22, Màrius Montón wrote:
> Hi,
>
> For my work on QEMU-SC, I need to stop time inside qemu.
> I need it in order to simulate HW modules with SystemC simulator, and
> meanwhile stop qemu time.
> In this way, applications running on qem should see its time freeze, and
>
