Hi Sakshi, I did not check completely, but at first sight you are misinterpreting the --restore-with-cpu option. https://stackoverflow.com/questions/49011096/how-to-switch-cpu-models-in-gem5-after-restoring-a-checkpoint-and-then-observe-t has information on what it does: use --restore-with-cpu only if you made a checkpoint with a non-atomic cpu model. Otherwise, don't use this option and just say cpu-type=detailed or whatever model you want to use after resuming the checkpoint.
The reasoning is that gem5 needs to know the exact model which the checkpoint was made with (normally this is the atomic model). It will resume the checkpoint using the --restore-with-cpu option (atomic by default) to set all the state correctly. After setting up the state, it will switch to the model specified with the regular --cpu-type option, to do the intended simulation. I have to admit it is a bit confusing, but hopefully you understand it now. Regards Timon On Wed, Aug 22, 2018 at 3:23 PM Abhishek Singh < abhishek.singh199...@gmail.com> wrote: > You can also use simpoints else just fast forward the start up instruction > and run for some instruction using -I > > On Wed, Aug 22, 2018 at 8:54 AM Sakshi Tiwari <sakshi.bo...@gmail.com> > wrote: > >> Can someone please reply to the query above? It will be really helpful. >> >> Regards, >> Sakshi >> >> >> On Fri, Aug 10, 2018 at 12:53 AM Sakshi Tiwari <sakshi.bo...@gmail.com> >> wrote: >> >>> Hi, >>> >>> I am running gem5 in se mode and I am using SPEC2006 test suite for my >>> experiments. To run the representative section of each of the SPEC >>> benchmark I created simpoints. I have a few questions now: >>> >>> 1) Is it necessary to create checkpoints? Or is there any other way to >>> simply fast forward the simulation on a multi-core system? >>> >>> 2) If it is necessary to create checkpoints then can someone please >>> confirm if the following commands are correct. I am able to follow step (a) >>> and (b) but most of the SPEC benchmarks are failing when I run step (c). >>> (a) Create checkpoint for each of the simpoint: >>> build/X86/gem5.opt configs/example/se.py >>> --take-simpoint-checkpoint=m5out/simpoints/libq/libq.simpoint,m5out/simpoints/libq/libq.weight,3000000,10000000 >>> --cmd="benchmarks/ben/libquantum_base.amd64-m64-gcc43-nn" --options="1397 >>> 8" --cpu-type=DerivO3CPU --l1d_size=32kB --l1i_size=32kB --l2_size=256kB >>> --caches --l2cache --l3cache --l3_size=8MB --num-cpus=1 --mem-size=8192MB >>> (b) Run checkpoint_aggregator script to aggregate the checkpoints which >>> would run on 4 different cores (I am running the same checkpoint on all the >>> 4 cores): >>> python util/checkpoint_aggregator.py -o >>> /home/sakshi/workspace2/gem5-63325e5b0a9d-modified/m5out/libq_cpt/cpt.None.4 >>> -c --cpts >>> /home/sakshi/workspace2/gem5-63325e5b0a9d-modified/m5out/libq_cpt/cpt.simpoint_03_inst_1100000000_weight_0.069900_interval_3000000_warmup_10000000/ >>> /home/sakshi/workspace2/gem5-63325e5b0a9d-modified/m5out/libq_cpt/cpt.simpoint_03_inst_1100000000_weight_0.069900_interval_3000000_warmup_10000000/ >>> /home/sakshi/workspace2/gem5-63325e5b0a9d-modified/m5out/libq_cpt/cpt.simpoint_03_inst_1100000000_weight_0.069900_interval_3000000_warmup_10000000/ >>> /home/sakshi/workspace2/gem5-63325e5b0a9d-modified/m5out/libq_cpt/cpt.simpoint_03_inst_1100000000_weight_0.069900_interval_3000000_warmup_10000000/ >>> --memory-size 8589934592 >>> (c) Run the simulation in atomic mode and restore it to the normal mode >>> (i.e. Timing+O3) from the aggregated checkpoint: >>> build/X86/gem5.opt configs/example/se.py --at-instruction >>> --checkpoint-restore=4 --restore-with-cpu=detailed --checkpoint-dir >>> /home/sakshi/workspace2/gem5-63325e5b0a9d-modified/m5out/libq_cpt/ >>> --cmd="benchmarks/ben/libquantum_base.amd64-m64-gcc43-nn;benchmarks/ben/libquantum_base.amd64-m64-gcc43-nn;benchmarks/ben/libquantum_base.amd64-m64-gcc43-nn;benchmarks/ben/libquantum_base.amd64-m64-gcc43-nn" >>> --options="1397 8;1397 8;1397 8;1397 8" --cpu-type=DerivO3CPU >>> --l1d_size=32kB --l1i_size=32kB --l2_size=256kB --caches --l2cache >>> --l3cache --l3_size=8MB --num-cpus=4 --mem-size=8192MB -I 100000000 >>> >>> Regards, >>> Sakshi >>> >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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