Hello, Thank you for your reply. I will try the patch. I think the command line is deterministic. I realized that when I set the number of cpu to 1 or 2, the simulation runs normally but from 3 it freezes in line *"brought up x cpu"*.
kind regards, Armel. -- *JEATSA TOULEPI Armel* Étudiant En Génie Informatique Tel: +237 650771894 / 655296800 Le jeu. 18 juil. 2019 à 23:35, Jason Lowe-Power <ja...@lowepower.com> a écrit : > Hmm... that's strange. I would expect that command line to be completely > deterministic. > > However, Brandon just submitted a patch that fixes an undefined behavior > error for x86. It should be merged soon, but if you'd like to try it now > see https://gem5-review.googlesource.com/c/public/gem5/+/19568 > > Cheers, > Jason > > On Thu, Jul 18, 2019 at 11:55 AM Armel Jeatsa <toulepiar...@gmail.com> > wrote: > >> Hello, >> I use the command : *build/X86/gem5.opt configs/example/fs.py >> --disk-image=$(pwd)/full-system-images/disks/linux-x86.img >> --kernel=$(pwd)/full-system-images/binaries/x86_64-vmlinux-2.6.22.9.smp >> --cpu-type=TimingSimpleCPU -n 4 --caches --l1i_size=8kB --l1d_size=8kB >> --l2cache --l2_size=256kB* >> and it seems to freeze at line : *"Brought up 4 CPUs"* >> >> kind regards, >> Armel >> -- >> *JEATSA TOULEPI Armel* >> Étudiant En Génie Informatique >> Tel: +237 650771894 / 655296800 >> >> >> Le lun. 15 juil. 2019 à 17:22, Jason Lowe-Power <ja...@lowepower.com> a >> écrit : >> >>> Hi Armel, >>> >>> It's unlikely the performance of the host machine. gem5 should be >>> deterministic, and the underlying host machine shouldn't make a difference. >>> >>> Since you're seeing non-deterministic behavior, you should ask "what >>> about the simulation is changing?". Is it some configuration options (e.g., >>> size of caches)? Is it the CPU pipeline design (e.g., size of ROB)? This >>> might give a hint as to the problem. >>> >>> If you could give us details about your configuration (e.g., Ruby vs >>> classic caches, what CPU model, etc.) we may be able to help more. >>> >>> Cheers, >>> Jason >>> >>> On Mon, Jul 15, 2019 at 1:39 AM Armel Jeatsa <toulepiar...@gmail.com> >>> wrote: >>> >>>> Hello everyone, >>>> >>>> Sometimes when i launch full system simulation, the process seems to be >>>> freezing at line "*Brought up 2 CPUs*" or at line "*Freeing unused >>>> kernel memory: 248k freed*", and other times it launches well and show >>>> the m5 terminal. What can be the cause of the problem?? could it be >>>> related to the performance of my machine? >>>> >>>> Kind regards, >>>> Armel. >>>> -- >>>> *JEATSA TOULEPI Armel* >>>> Étudiant En Génie Informatique >>>> Tel: +237 650771894 / 655296800 >>>> _______________________________________________ >>>> gem5-users mailing list >>>> gem5-users@gem5.org >>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>> >>> _______________________________________________ >>> gem5-users mailing list >>> gem5-users@gem5.org >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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