On 04.10.2012 11:43, Nilay Vaish wrote:
> There are specific comments inline. Overall, I think you need to have a > better understanding of the options that you are trying to work with. > > On Thu, 4 Oct 2012, Tao Zhang wrote: > >> Hi Nilay, Maybe I didn't make it clear. What I want is to run Multi-programmed simulation rather than multi-threaded simulation. In other words, I want 4 cores to run 4 benchmarks (though they are all same) and each core has only 1 thread. As a result, I set "np = 4 and numThreads = 1" in my configuration script. I also produced 4 identical LiveProcess() and assigned them to each core. However, the simulation immediately terminated after the cpu switching from atomic to detailed, with message "a thread reached the max instruction count". I go through the Simulation.py, src/cpu/base.cc, src/cpu/O3/commit_impl.cc but didn't find the clue that I have wrongly set the -F and -I with the same number (100000000). > > Can you clearly state how is this different from what you expect? > >> If the instruction count is based on the thread and no change during the cpu switching, why I can use -F and -I together for single-core simulation? The > > Why not? You need to better understand the meaning of those two options. It is not clear what is incorrect, hence fixing some thing is not out of question right now. The code is across two places. The CPUs put exit events on their instruction queues (http://grok.gem5.org/search?q=comInstEventQueue) and then the simulation code handles what do do when the C++ portion of the code exits (end the simulation, or restart with a different CPU; see http://grok.gem5.org/xref/gem5/configs/common/Simulation.py#461). >> another question: Even though the benchmarks are same, I assume the physical address range to accommodate each benchmark is still different since gem5 generates 4 process stacks with different address mapping. Is it correct? > > I think this is correct. > > -- > Nilay > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.orghttp://m5sim.org/cgi-bin/mailman/listinfo/gem5-users [1] Links: ------ [1] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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