Thanks.
Would be enough to change a bit the lookupAndUpdateNextPC() function such
that the return is always false ?
I mean changing the:
if (!inst->isControl()) {
TheISA::advancePC(nextPC, inst->staticInst);
inst->setPredTarg(nextPC);
inst->setPredTaken(false);
return false;
}
to
// if (!inst->isControl()) {
TheISA::advancePC(nextPC, inst->staticInst);
inst->setPredTarg(nextPC);
inst->setPredTaken(false);
return false;
// }
?
On Tue, Oct 23, 2012 at 10:02 AM, Mitch Hayenga <
mitch.hayenga+g...@gmail.com> wrote:
> Since gem5 the O3 cpu model actually executes instructions @ execute (not
> fetch/decode) a perfect branch predictor is a bit tricky. Assuming you are
> running a single-threaded app in SE mode (so you don't have
> OS/multi-threaded time variance issues), you could simply run the
> application twice. Save the branch outcomes from the first run. Then
> re-run the app, with a "predictor" that just uses the branch results from
> the first time you ran the application.
>
> On Mon, Oct 22, 2012 at 8:43 PM, mihai pricopi <mihai.pric...@gmail.com>wrote:
>
>> Hi,
>>
>> I am using arm_detailed SE mode.
>> Is there a simple way to force the branch predictor to do perfect
>> prediction ?
>>
>> Thanks
>>
>> _______________________________________________
>> gem5-users mailing list
>> gem5-users@gem5.org
>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
>>
>
>
> _______________________________________________
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>
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