Hi, thank you for your reply. Yes, the CPU is in 1GHz. The trace indicates that the tick stride is always 1000 for CPU execution. Thank you very much!
Weidan 2010/3/10 Gabe Black <[email protected]> > 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 > -- 吴为丹 中科院计算所 微处理器中心0853 北京海淀区科学院南路6号 100190 (86-10)6260-0853 (86-10)8268-3196 (86)138-112-10636 [email protected]
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