Hi folks,
I'm kinda new to Gem5. I'm trying to see the impact of the hardware threads number on a single-core x86 system performance. So I'm trying to use DerivO3CPU with smtNumFetchingThreads > 1 (1 is the default value). While the default value works fine, I'm getting weird errors when I set smtNumFetchingThreads=2: gem5.opt: build/X86/cpu/o3/fetch_impl.hh:683: void DefaultFetch<Impl>::finishTranslation(const Fault&, const RequestPtr&) [with Impl = O3CPUImpl; Fault = std::shared_ptr<FaultBase>; RequestPtr = std::shared_ptr<Request>]: Assertion `!finishTranslationEvent.scheduled()' failed. I think it is somehow related to the X86 ISA because on line 683 of fetch_impl.hh there is this comment: // Don't send an instruction to decode if we can't handle it. I tried both the default configuration script se.py and a simple config script I wrote myself: uild/X86/gem5.opt configs/example/se.py -c tests/test-progs/threads/bin/x86/linux/threads --cpu-type=DerivO3CPU --param="system.cpu[0].smtNumFetchingThreads=2" --caches build/X86/gem5.opt configs/smt/simple_smt.py With the DerivO3CPU instantiate like that: system.cpu = DerivO3CPU(smtNumFetchingThreads=2) Also, it failed on the same error when I tried single-threaded programs I compiled myself, but worked just fine on the original hello (tests/test_prog/hello/bin/x86/linux/hello) shipped with Gem5. Can someone help me? I appreciate any help you can provide. Manor Zvi.
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