You could always give the “caching” patch from the sniper team a spin:
http://snipersim.org/w/McPAT
Andreas
From: Fernando Endo <[email protected]<mailto:[email protected]>>
Reply-To: gem5 users mailing list
<[email protected]<mailto:[email protected]>>
Date: Tuesday, 26 November 2013 10:47
To: gem5 users mailing list <[email protected]<mailto:[email protected]>>
Subject: Re: [gem5-users] Integrating gem5 with Mcpat
Hello,
It seems that one can divide mcpat execution in two or three parts:
1) chip modeling => estimates the energy cost per access
2) multiply accesses by energy costs
3) estimate the peak power of components
So if you want to run mcpat faster, the step 1 can be done only once per gem5
simulation, this step seems to be the slower one.
If you find a way to separate these, for example dumping the internal chip
model in a file and read every time, could you please send us a patch?
Regards,
--
Fernando A. Endo, PhD student and researcher
Université de Grenoble, UJF
France
2013/11/26 Sudarshan <[email protected]<mailto:[email protected]>>
Thanks Lluis..Only problem with this is that i need to dump stats at very low
instruction grnaulairty like every 5000 retired instruction and the above
approach makes the stats file huge(since i dump stats every 5000 committed). I
have already tried the above approach and its too slow.
Thanks
Sudarshan
Graduate student
Electrical Engineering
Univ of Massachusetts Amherst
On Tue, Nov 26, 2013 at 10:55 AM, Lluís Vilanova
<[email protected]<mailto:[email protected]>> wrote:
Sudarshan writes:
> Hi,
> I would like to integrate gem5 into McPAT since i would like to monitor the
> dynamic power dissipated at a particular instruction granularity(example: for
> every 5000 committed instructions). So i would need to call McPAT from gem5
> continuously throughout the program execution. Any pointers on this would be
> helpful.I would also like to know if there is patch already available for
> this.
The simplest way is to dump the gem5 statistics every N cycles (e.g., using
'dumpresetstats' [1]), and then process those to get numbers from mcpat.
[1] http://www.m5sim.org/M5ops
Lluis
--
"And it's much the same thing with knowledge, for whenever you learn
something new, the whole world becomes that much richer."
-- The Princess of Pure Reason, as told by Norton Juster in The Phantom
Tollbooth
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