On Wed, 2 Mar 2011 13:29:04 -0600, reena panda wrote:
Hi,
I am
trying to collect some statistics from m5 and I am running it in the
AtomicSimpleCPU model, ALPHA FS Mode.
What I understand from the code
is that in atomic model,
a) "staticInstPtr" holds some details about
the currently executing instructions,
b) while the "Trace::InstRecord*
traceData" can be used to collect dynamic statistics, like Effective
addresses, final data values as the instruction gets executed.
Please
correct me if I am wrong.
I also checked that "traceData" gets
initialized in the preExecute function in cpu/simple/base.cc as
follows:-
traceData = tracer->getInstRecord(curTick, tc, curStaticInst,
thread->readPC(), curMacroStaticInst,
thread->readMicroPC());
if(traceData)
printf("TraceData
Initialized");
But when I am trying to check if tracedata was allocated
after the above instruction is executed, it seems that tracedata is
still "Null".
Why is it not initialised then? I am not able to find
which getInstRecord is being referred here.
What could I do to collect
the memory reference effective addresses/data values then? Any pointers
to what I should look at?
Thanks,
Reena
I haven't actually looked
at the code, but I'm guessing it's NULL beacuse the --trace-flag=Exec
isn't on the command line. There is code in getInstRecord that just
returns null if tracing isn't enabled because it slows down the
simulator.
Ali
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