Hi Timon, Thank you to point this out. On Thu, Aug 23, 2018 at 12:58 PM Timon Evenblij <evenblij.ti...@gmail.com> wrote:
> 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 > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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