Hi guys, I did not use gem5 for a long time and I try to get back at it. I am also new to full system simulations. I am facing a problem when I try to copy files on on my gem5 image disk and access them through my gem5 simulation.
I have an ubuntu 16 img for ARM 64bits that boots and I can checkpoint and simulate and everythings looks OK. But when I try to add new files to it, the new files are not visible within my gem5 simulation or sometimes they appears but are truncated To add new files, I mount it on a loop device on the host computer which is not ARM, it is a RHEL7 with x86_64 architecture like this sudo mount -o loop,offset=65536 gem5-ubuntu16.04-aarch64-20190523.img <my mountpoint> When I open my simulation in interactive mode, and stat my copied file: root@aarch64-gem5:/home/test# stat ./stream_armclang_sve.exe stat ./stream_armclang_sve.exe File: './stream_armclang_sve.exe' Size: 5 Blocks: 8 IO Block: 4096 regular file Device: 801h/2049d Inode: 405148 Links: 1 And when I do the same operation on my host computer: File: './stream_armclang_sve.exe' Size: 3790000 Blocks: 7392 IO Block: 4096 regular file Device: 702h/1794d Inode: 405148 Links: 1 Inode is the same but the size of the file is different, and I get a strange error while trying to execute it. It looks like there is a difference between the host OS and the simulated OS in gem5 in the way they read/write the disk image that I am not sure how to solve My command to launch is as follow, I am starting from a checkpoint: ./build/ARM/gem5.opt \ --outdir=m5out/stream_sve_16core_HBM2 \ configs/example/fs.py \ -r 1 \ --checkpoint-dir=<my chpk dir> \ --cpu-type=AtomicCPU \ --restore-with-cpu= AtomicCPU \ --arm-iset=aarch64 \ --machine-type=VExpress_GEM5_V1 \ --kernel=linuximage/vmlinux \ --disk=<my img disk> --machine-type=VExpress_GEM5_V1 \ --num-cpus=16 \ --num-dirs=8 \ ... I was wondering what is your best practices to transfer files to the img disk and any help is welcome ! Thanks for your patience =) Gregory .V
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