Hi Gagan, The problem is that the CPU doesn't have an ISA object as a child. Most likely, the function `createThreads()` wasn't called on the CPU instance. You need to set all of this up *in the python configuration*, not in the C++ models.
Solving this problem is difficult if you're using the (soon to be) deprecated fs.py script. This script tries to do everything for everyone and ends up doing nothing well. I suggest looking into the new gem5 standard library and working to create a board which suits your needs. See https://www.gem5.org/documentation/gem5-stdlib/overview Cheers, Jason On Sun, Jun 12, 2022 at 11:11 PM Gagan Panwar <gaganpan...@gmail.com> wrote: > Hi everyone, > > I'm trying to run the latest version of Gem5 under X86 and it segfaults at > the following line: > > build/X86/cpu/o3/fetch.cc:139 > > decoder[tid] = params.decoder[tid]; > > gdb says params.decoder is a "vector of length 0". Looks like it has not > been initialized. > > Any idea how to correctly initialize this? > > Here is my command line: > > ./build/X86/gem5.opt -r -d sim_output/stride/benchmark > configs/example/fs.py --mem-size=16GB -n 4 -r 1 > --disk-image=/hdd0/newCPTs/ubuntu-server-16.04.6.img --checkpoint-dir= > /hdd0/newCPTs/bench_1 --cpu-type=DerivO3CPU --rel-max-tick=2000000000 > --l2-hwp-type=StridePrefetcher --caches --l2cache --kernel=vmlinux-5.4.49 > > I have also tried assigning decoder[tid] to a new TheISA::Decoder() object > in fetch.cc like it used to be in older versions but this leads to build > issues. > > To reiterate, I have not modified a single line of code. I was able to > take checkpoints under KVM mode successfully, however. > > Thank you, > Gagan > _______________________________________________ > gem5-users mailing list -- gem5-users@gem5.org > To unsubscribe send an email to gem5-users-le...@gem5.org >
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