Hi Steve,
I want to use the getNumCPUs() method in simulate.cc. I tried doing
this:
add to simulate.cc:
#include "system.hh"
...
within the simulate() function:
n=system->getNumCPUs();
but this does not work since the "system" object has not been defined here.
How do I acess the global system object. In other files where they use
getNumCPUs, the system object has been derived from a
Params *p
argument passed to that function.
But the simulate() gets no such argument.
- Sujay
----- Original Message -----
From: "Steve Reinhardt" <[EMAIL PROTECTED]>
To: "M5 users mailing list" <[email protected]>
Sent: Sunday, June 22, 2008 7:36 PM
Subject: Re: [m5-users] get python values into c files
> The real question is: what do you want to access and why?
>
> The SimObject parameters that you specify in python are handed off to
> the corresponding objects in C++, so they are already there. For
> example, the C++ L2 cache object knows its size. Some of the things
> that aren't specifically passed as SimObject parameters are known in
> C++ as well. For example, the System object knows how may CPUs are in
> the system it represents, and you can access that through the
> getNumCPUs() method.
>
> That said, the first thing you want to be sure of is that you really
> need to access the variable from C++; it may be that it's easier to do
> what you want to do in python anyway. If you can be more specific
> about your end goal then we can probably provide better advice.
>
> Steve
>
> On Sun, Jun 22, 2008 at 4:25 PM, Gabe Black <[EMAIL PROTECTED]> wrote:
>> You could also create a new SimObject which has all the information you
>> want stored in it. SimObjects are how components of a simulation, both
>> concrete and abstract, are represented in python and at a higher level
>> in C++. The C++ representation of a SimObject is populated using the
>> values in the python representation, so you can store the values you're
>> interested in in the python SimObject before starting up the simulation.
>> Then have your C++ code refer to it's copy to get the values back out.
>> There are lots of examples of SimObjects in M5 which should get you
>> started. If you look around the source tree, the files which define the
>> python version of SimObjects are .py files mixed in with the .ccs and
>> .hhs. Unfortunately I don't think there's any documentation specifically
>> about how to make you're own SimObjects (someone please correct me if
>> I'm wrong), but it's more straightforward than it used to be so you
>> hopefully won't have too much trouble. To see what basic types of
>> parameters there are you should look in src/python/m5/params.py.
>>
>> Gabe
>>
>> Sujay Phadke wrote:
>>> Sure, but I was wondering is there an easier way to connect between
>>> the dynamic python parameters and the c++ code?
>>>
>>> ----- Original Message -----
>>> *From:* Ravi Prakash M <mailto:[EMAIL PROTECTED]>
>>> *To:* M5 users mailing list <mailto:[email protected]>
>>> *Sent:* Sunday, June 22, 2008 6:11 PM
>>> *Subject:* Re: [m5-users] get python values into c files
>>>
>>> Hi Sujay,
>>>
>>> U can use file I/O operation , put the comments next to numcpus
>>> definition and also add some keyword , and then search for that
>>> keyword read the lines using readline() and extract the information
>>> ,
>>> u need .
>>>
>>> Regards,
>>> Ravi
>>>
>>> On Sun, Jun 22, 2008 at 4:45 PM, Sujay Phadke
>>> <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>> wrote:
>>>
>>> Hello,
>>> I am trying to get the dynamic values of the system
>>> configuration and use it in a custom .cc file in M5. For
>>> example, I would like to get the numcpus, or L2 size, etc.
>>> which is either in the .py files or specified in the config
>>> files. How do I get these values and use it in my files?
>>>
>>> Thanks,
>>> Sujay
>>>
>>>
>>> _______________________________________________
>>> m5-users mailing list
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>>>
>>>
>>>
>>>
>>> --
>>> Regards,
>>> Ravi Prakash M
>>>
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