Hello, Do you get an error after running the first command? ($ build/X86/gem5.opt configs/example/fs.py --script=configs/boot/hack_back_ckpt.rcS). The output should say something like "Checkpointing simulation...". This command should create a folder starting with "cpt" in your m5out folder. And then you should be able to use it with "-r 1 --script=[your script]".
If you are using "hack_back_ckpt.rcS" you don't need to use "m5 checkpoint". Otherwise you can use it in a script file (to be loaded with --script=[path/to/file/checkpoint.rcS]) for instance: $ cat runscripts/checkpoint.rcS m5 checkpoint m5 exit This will create a checkpoint and exit. But be aware that when you use a script like this, this same script will be loaded to your system and it will just exit when you restore from this checkpoint (this was my mistake when I first used checkpoints). So you need to put the commands you want to simulate between the last two commands: m5 checkpoint ./test.sh m5 exit Kind regards Serhat ________________________________________ From: gem5-users [gem5-users-boun...@gem5.org] on behalf of Yunxia Zhu [emilia...@gmail.com] Sent: 28 August 2018 10:28 To: gem5 users mailing list Subject: Re: [gem5-users] Create Checkpoint Hello Serhat Gesoglu, I used m5 commands but I still failed to create checkpoint. Here it is details: Create checkpoint: gem5 $ build/X86/gem5.opt configs/example/fs.py --script=configs/boot/hack_back_ckpt.rcS Restore checkpoint: gem5 $ build/X86/gem5.opt configs/example/fs.py -r 1 Then it shows "checkpoint 1 not found" And I am also confused where to add "m5 checkpoint". Could you show me the command? Thank you very much. with best regards Yunxia Zhu On Tue, 21 Aug 2018 at 17:05, Serhat Gesoglu <serhat.geso...@manchester.ac.uk<mailto:serhat.geso...@manchester.ac.uk>> wrote: Hello, gem5-gpu is the combination of gem5 and gpgpu-sim. You may find more information here: https://gem5-gpu.cs.wisc.edu/wiki/ If you are not planning to simulate gpus sticking to gem5 might be a better idea. To create checkpoints you have two options. One is the command line option "--checkpoint-at-end". This will create a checkpoint when your simulation ends. The second way is to use use m5 commands (which I think the easier way). There is a script file: "configs/boot/hack_back_ckpt.rcS" to see more on this. You need to run the simulation with this script first. It creates a checkpoint and stops. The second time (when restored from a checkpoint), you use your own script. Kind regards Serhat Gesoglu ________________________________________ From: gem5-users [gem5-users-boun...@gem5.org<mailto:gem5-users-boun...@gem5.org>] on behalf of Yunxia Zhu [emilia...@gmail.com<mailto:emilia...@gmail.com>] Sent: 21 August 2018 15:45 To: gem5 users mailing list Subject: [gem5-users] Create Checkpoint Hello everyone, I want to create a checkpoint to speed up startup of the gem5 OS, but I have some doubts. 1. When I search it online, someone use gem5.gpu to create checkpoint. What is the difference between gem5 and gem5-gpu? In my opinion they are different simulators. 2. After checking some document I still have no idea about the checkpoint. I don't know how to start to create it. Could anyone give me any idea to do it? Thanks for your time and reply. with best regards Yunxia Zhu _______________________________________________ gem5-users mailing list gem5-users@gem5.org<mailto: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
