Thank you, Abhishek. I observed an unexpected behavior while fast forwarding. I fast forwarded the simulation for 1 billion instructions and then simulated for 100 million instructions (using -I). However, in the stats.txt, total simulated instructions are approx 2 billions (because 2 benchmarks are running) and simulated instruction for every cpu and switch_cpus is 0. Do you have any idea why is this happening?
Just in case if it is important, I used the following command: build/X86/gem5.opt configs/example/se.py --cmd="/home/sakshi/benchmarks/ben/mcf_base.amd64-m64-gcc43-nn;/home/sakshi/benchmarks/ben/mcf_base.amd64-m64-gcc43-nn" --options="/home/sakshi/benchmarks/ben/inp.in;/home/sakshi/benchmarks/ben/ inp.in" --cpu-type=DerivO3CPU --l1d_size=32kB --l1i_size=32kB --l2_size=256kB --caches --l2cache --l3cache --l3_size=8MB --num-cpus=2 --mem-size=8192MB --fast-forward=1000000000 -I 100000000 On Wed, Aug 22, 2018 at 6:53 PM Abhishek Singh < [email protected]> 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 <[email protected]> > 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 <[email protected]> >> 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 >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
_______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
