[gem5-users] Strange Behavior of checkpoint in multicore

[Abdlerhman Abotaleb via gem5-users]

I have a program bin.riscv that is running on 4 prcoessors simulatenously. Inside riscv.bin: // some code m5_checkpoint(0,0); m5_reset_stats(0,0);   // some code I'm running GEM5 using the following commands: First gem5.opt ./configs/example/se.py -n 4 --caches --max-checkpoints 1  --cpu-type AtomicSimpleCPU --cmd 'a.riscv;a.riscv;a.riscv;a.riscv' Then gem5.opt ./configs/example/se.py -n 4 --caches --checkpoint-restore=1 --restore-with-cpu DerivO3CPU --cmd 'a.riscv;a.riscv;a.riscv;a.riscv' The statistics are different than if I run the same code (including writing checkpints and reset stats) but with the following gem5 command: gem5.opt ./configs/example/se.py -n 4 --caches --cpu-type DerivO3CPU --cmd 'a.riscv;a.riscv;a.riscv;a.riscv' It is worth mentioning that also the different CPUs don't have the same number of instructions instsIssued or numInsts (i.e committed instructions) (from GEM5 generated stats file) . Do you have explanations or any useful suggestions? Thanks.

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