Thanks Gabe and Steve for your suggestions. What I am trying to do is integrated wattch in M5 beta 5, using Rick Strong's basic code.
It consists of a lot of counters integrated into various O3 implementation files (*_impl.hh), mem/cache/cache_impl.hh and calling the power calculations routines from power.c in simulate.cc He used a separate definitions files in which he defined the constants used for simulation (say numcpus or memory size), since his code did not have any hooks to get the information from python. for example: I would need to access to various system parameters - say the value of numcpus supplied at runtime, the value of memory size, etc. These are specified by the user using the config script and I assume some SimObject is created for the at runtime. Some other things like lsq_size are defined in O3CPU.py and I would need to access it. Currently the values are obtained by using a #include<> (in each of those files above) to include the file which has these parameters defined. So everytime we change a simulation parameter, this file has to be edited manually. So what would be the best way of going about this? Secondly, is this the best way of integrating wattch into M5? (modifying all the files I mentioned above). Or can you suggest a more cleaner approach that would work for all CPU models. Thanks, 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 >>> [email protected] <mailto:[email protected]> >>> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >>> >>> >>> >>> >>> -- >>> Regards, >>> Ravi Prakash M >>> >>> ------------------------------------------------------------------------ >>> _______________________________________________ >>> m5-users mailing list >>> [email protected] >>> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >>> >>> ------------------------------------------------------------------------ >>> >>> _______________________________________________ >>> m5-users mailing list >>> [email protected] >>> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >> >> _______________________________________________ >> m5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >> > _______________________________________________ > m5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users > _______________________________________________ m5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
