Also, someone correct me if I'm wrong, but I think the "t" is for "ticks" (ie periods of the global clock) rather than terahertz. If you want to change a clock frequency, I think you need to use units like GHz or ghz or similar. You can probably find examples of that in the configs directory. You should also not change the settings in BaseCPU.py because you'd be changing the default value for all CPUs in the simulation. That would work if all CPUs were supposed to be the same, but really the better way would be to either subclass the base CPU in your python configuration script, or to instantiate a CPU and update its settings individually. The following link should explain how that all works. http://m5sim.org/wiki/index.php/Simulation_Scripts_Explained
Gabe Lisa Hsu wrote: > Veydan, > > the clock you are talking about refers to the global system clock. The > CPU clock setting that you noticed in fs.py is the CPU clock. The > global system clock is fast so that you can have clocks of other > components in the system (busses, etc.) set relative to the global > clock at a fine granularity. > > Lisa > > On Wed, Mar 10, 2010 at 5:07 AM, Veydan Wu <[email protected] > <mailto:[email protected]>> wrote: > > Hi, all, I found that the default simulated CPU clock frequency is > 1T, if I do not make any mistake. The running log is as followed: > > M5 executing on ubuntu > command line: build/ALPHA_FS/m5.fast configs/example/fs.py -n 4 > --caches --l2cache > Global frequency set at 1000000000000 ticks per > second (1T here) > warn: kernel located at: > > /media/Study/CPU/CPUsource/M5/m5-stable-733318abb7b1/dist/m5/system/binaries/vmlinux > > I check the src/cpu/BaseCPU.py, there is one statement here: > > clock = Param.Clock('1t', "clock speed"); > > But the Clock class in src/python/m5/param.py seems only support > "t" but not "g", how can I change that? I don't want the CPU run > so fast. Besides, in the fs.py, the CPU is set to 1GHZ, what about > this? Thank you! > > > Weidan > > _______________________________________________ > m5-users mailing list > [email protected] <mailto:[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
