Thank you for the reply Tom. In my case, I have been able to fix it by supplying the "decoder=ArchDecoder()" parameter to the cpu_class constructor when switch_cpus is first initialized. (Line 465 in Simulation.py)
> switch_cpus = [cpu_class(switched_out=True, cpu_id=(i), decoder=ArchDecoder()) for i in range(np)] - Gagan On Mon, Jun 13, 2022 at 3:43 AM Tom Rollet <tom.rol...@huawei.com> wrote: > Hello, > > > > I had the same problem when using kvm/o3 with repeat switch. > > > > I added a hacky fix in Simulation.py file where I assign the testsys > decoder to the other cpu that does not have the decoder: > > Repeat_switch_cpus[0].decoder = testsys.cpu[0].decoder > > > > This seems to solve the issue. But I did not look more into detail what is > the underlying problem. > > > > Tom > > > > *From:* Gagan Panwar <gaganpan...@gmail.com> > *Sent:* 13 June 2022 08:06 > *To:* gem5-users@gem5.org > *Subject:* [gem5-users] Gem5 segfaults in build/X86/cpu/o3/fetch.cc > > > > 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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