Hi, I am trying to generate and later restore checkpoints using SimPoint, but right now I get an error about the system's memory size when restoring from the checkpoints.
This is the command I use to generate the checkpoint, after obtaining the phases and weights from the SimPoint binary: ./build/ARM/gem5.opt configs/example/se.py --take-simpoint-checkpoint=/home/tom/archsim/SimPoint.3.2/bin/simpoints,/home/tom/archsim/SimPoint.3.2/bin/weights,100000,1000 --cpu-type=NonCachingSimpleCPU --cmd="se-benchmarks/Bubblesort" The output from this looks fine: gem5 Simulator System. http://gem5.org gem5 is copyrighted software; use the --copyright option for details. gem5 version 20.1.0.4 gem5 compiled Feb 23 2021 21:47:19 gem5 started Mar 10 2021 22:47:21 gem5 executing on home, pid 21676 command line: ./build/ARM/gem5.opt configs/example/se.py --take-simpoint-checkpoint=/home/tom/archsim/SimPoint.3.2/bin/simpoints,/home/tom/archsim/SimPoint.3.2/bin/weights,100000,1000 --cpu-type=NonCachingSimpleCPU --cmd=se-benchmarks/Bubblesort warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.master is deprecated. `master` is now called `mem_side_ports` simpoint analysis file: /home/tom/archsim/SimPoint.3.2/bin/simpoints simpoint weight file: /home/tom/archsim/SimPoint.3.2/bin/weights interval length: 100000 warmup length: 1000 3 0.2 299000 1000 6 0.2 599000 1000 21 0.15 2099000 1000 22 0.225 2199000 1000 27 0.225 2699000 1000 Total # of simpoints: 5 Global frequency set at 1000000000000 ticks per second warn: No dot file generated. Please install pydot to generate the dot file and pdf. warn: DRAM device capacity (8192 Mbytes) does not match the address range assigned (512 Mbytes) 0: system.remote_gdb: listening for remote gdb on port 7000 info: Entering event queue @ 0. Starting simulation... info: Increasing stack size by one page. Writing checkpoint warn: Checkpoints for file descriptors currently do not work. Checkpoint #0 written. start inst:299000 weight:0.200000 info: Entering event queue @ 149915000. Starting simulation... Writing checkpoint warn: Checkpoints for file descriptors currently do not work. Checkpoint #1 written. start inst:599000 weight:0.200000 info: Entering event queue @ 299915000. Starting simulation... Writing checkpoint warn: Checkpoints for file descriptors currently do not work. Checkpoint #2 written. start inst:2099000 weight:0.150000 info: Entering event queue @ 1049915000. Starting simulation... Writing checkpoint warn: Checkpoints for file descriptors currently do not work. Checkpoint #3 written. start inst:2199000 weight:0.225000 info: Entering event queue @ 1099915000. Starting simulation... Writing checkpoint warn: Checkpoints for file descriptors currently do not work. Checkpoint #4 written. start inst:2699000 weight:0.225000 Exiting @ tick 1349915000 because simpoint starting point found 5 checkpoints taken Then I try to restore from a checkpoint using this command: ./build/ARM/gem5.opt configs/example/fs.py --restore-simpoint-checkpoint -r 1 --checkpoint-dir m5out --cpu-type=TimingSimpleCPU --restore-with-cpu=NonCachingSimpleCPU --disk-image=$M5_PATH/disks/expanded-linaro-minimal-aarch64.img --kernel=$M5_PATH/binaries/vmlinux.arm64 and encounter the following: gem5 Simulator System. http://gem5.org gem5 is copyrighted software; use the --copyright option for details. gem5 version 20.1.0.4 gem5 compiled Feb 23 2021 21:47:19 gem5 started Mar 10 2021 22:50:20 gem5 executing on home, pid 21819 command line: ./build/ARM/gem5.opt configs/example/fs.py --restore-simpoint-checkpoint -r 1 --checkpoint-dir m5out --cpu-type=TimingSimpleCPU --restore-with-cpu=NonCachingSimpleCPU --disk-image=/home/tflynn/archsim/gem5/../m5_binaries/disks/expanded-linaro-minimal-aarch64.img --kernel=/home/tflynn/archsim/gem5/../m5_binaries/binaries/vmlinux.arm64 warn: iobus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: bridge.master is deprecated. `master` is now called `mem_side_port` warn: membus.master is deprecated. `master` is now called `mem_side_ports` warn: bridge.slave is deprecated. `slave` is now called `cpu_side_port` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: iobus.master is deprecated. `master` is now called `mem_side_ports` warn: iobridge.slave is deprecated. `slave` is now called `cpu_side_port` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: iobridge.master is deprecated. `master` is now called `mem_side_port` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` warn: membus.master is deprecated. `master` is now called `mem_side_ports` Resuming from m5out/cpt.simpoint_00_inst_299000_weight_0.200000_interval_100000_warmup_1000 Resuming from SimPoint #0, start_inst:299000, weight:0.200000, interval:100000, warmup:1000 Global frequency set at 1000000000000 ticks per second warn: No dot file generated. Please install pydot to generate the dot file and pdf. warn: DRAM device capacity (8192 Mbytes) does not match the address range assigned (512 Mbytes) info: kernel located at: /home/tflynn/archsim/gem5/../m5_binaries/binaries/vmlinux.arm64 warn: Highest ARM exception-level set to AArch32 but the workload is for AArch64. Assuming you wanted these to match. system.vncserver: Listening for connections on port 5900 system.terminal: Listening for connections on port 3456 system.realview.uart1.device: Listening for connections on port 3457 system.realview.uart2.device: Listening for connections on port 3458 system.realview.uart3.device: Listening for connections on port 3459 0: system.remote_gdb: listening for remote gdb on port 7000 fatal: Memory range size has changed! Saw 536870912, expected 67108864 Memory Usage: 1080816 KBytes As you can see, the error 'fatal: Memory range size has changed! Saw 536870912, expected 67108864' appears. Any idea why this could happen? The disk image and kernel I am using are from the Arm RSK Gem5 tutorial ( https://github.com/arm-university/arm-gem5-rsk) Thanks, Tom
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