Hi Abdelrahman, >From the get error message, it says: "This error may be caused by a too restrictive setting in the file '/proc/sys/kernel/perf_event_paranoid' The default value was changed to 2 in kernel 4.6 A value greater than 1 prevents gem5 from making the syscall to perf_event_open"
If you put `1` or `0` in /proc/sys/kernel/perf_event_paranoid it should work. Cheers, Jason On Wed, Mar 9, 2022 at 9:27 PM Abdelrahman S. Hussein < abdelrahman.sob...@gmail.com> wrote: > Hello, > > I am trying to run gem5 in FS mode using the following command (I am using > gem5 v21.2): > > gem5/build/X86/gem5.opt > gem5/configs/example/gem5_library/x86-spec-cpu2017-benchmarks.py --image > spec-2017/disk-image/spec-2017/spec-2017-image/spec-2017 --benchmark > 503.bwaves_r --size test > > However, I got the following error (There are details after the error, > please continue reading after you check the error): > > build/X86/sim/simulate.cc:194: info: Entering event queue @ 0. Starting > simulation... > build/X86/cpu/kvm/perfevent.cc:176: panic: PerfKvmCounter::attach recieved > error EACCESS > This error may be caused by a too restrictive setting > in the file '/proc/sys/kernel/perf_event_paranoid' > The default value was changed to 2 in kernel 4.6 > A value greater than 1 prevents gem5 from making > the syscall to perf_event_open > Memory Usage: 3817816 KBytes > build/X86/cpu/kvm/perfevent.ccProgram aborted at tick 0 > :176: panic: PerfKvmCounter::attach recieved error EACCESS > This error may be caused by a too restrictive setting > in the file '/proc/sys/kernel/perf_event_paranoid' > The default value was changed to 2 in kernel 4.6 > A value greater than 1 prevents gem5 from making > the syscall to perf_event_open > Memory Usage: 3817816 KBytes > ./spec_fs_run.sh: line 16: 1648681 Aborted > > I have done some checking: > > - Ran kvm-ok to make sure that KVM is working: > $kvm-ok > INFO: /dev/kvm exists > KVM acceleration can be used > > - Also, I checked the value inside /proc/sys/kernel/perf_event_paranoid > $cat /proc/sys/kernel/perf_event_paranoid > 3 > > - The SPEC17 is created by following the instructions in: > https://gem5art.readthedocs.io/en/v1.0.0/tutorials/spec2017-tutorial.html > > > Questions: > > - How to solve this error? > > - Is it safe to modify the /proc/sys/kernel/perf_event_paranoid of the > linux running on my host machine to 1, in case this solves the problem? > > - Is there a better way you can suggest using SPEC2017 in FS mode to > evaluate my system on gem5? > > > > Thanks. > > -- > > *Best,Abdelrahman Hussein* >
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