Yes, I did :). -- Dr. Bobby R. Bruce Room 2235, Kemper Hall, UC Davis Davis, CA, 95616
web: https://www.bobbybruce.net On Thu, Oct 15, 2020 at 1:48 PM Gabe Black <gabebl...@google.com> wrote: > I think you mean the TimingSimpleCPU, not the AtomicTimingCPU. > > Gabe > > On Thu, Oct 15, 2020 at 1:41 PM Bobby Bruce via gem5-users < > gem5-users@gem5.org> wrote: > >> Hey Krishnan, >> >> Linux does take about 45 minutes or so to run using AtomicSimpleCPU. >> You're not doing anything wrong in this regard. I'm afraid there's no >> information I can give you on making it faster. Anything to make this >> significantly faster, would be sacrificing the accuracy of simulation. This >> a problem, across the board, for architecture simulators. >> >> KVMCPU is certainly faster but, given what else you've been saying, you >> wish to do real simulations and gather statistics. The KVMCPU is not the >> right tool for this. It doesn't simulate anything. It doesn't have timing >> information. AtomicSimpleCPU is also not suitable. I'd recommend using the >> AtomicTimingCPU, which will give you a decent simulation and stats output. >> >> Kind regards, >> Bobby >> -- >> Dr. Bobby R. Bruce >> Room 2235, >> Kemper Hall, UC Davis >> Davis, >> CA, 95616 >> >> web: https://www.bobbybruce.net >> >> >> On Thu, Oct 15, 2020 at 1:50 AM krishnan gosakan via gem5-users < >> gem5-users@gem5.org> wrote: >> >>> Hi all. >>> I hope everyone is doing good. I recently started working with gem5 >>> simulator. I am trying to do some modification to the page table walker >>> (pagetable_walker). My problem is that booting linux under full system >>> emulation is very slow. It takes nearly 30 to 40 minutes to boot. I am >>> using AtomicSimpleCPU. I just want to know if this is the normal case for >>> this cpu type. >>> >>> I also tried with X86KvmCPU and I used the following command, >>> $gem5_dir/build/X86/gem5.opt $gem5_config_dir/example/fs.py --kernel >>> $linux_dir/vmlinux --disk-image $cur_dir/qemu-image.img --caches --l2cache >>> --cpu-type X86KvmCPU --fast-forward 1000000000 >>> >>> This was faster than atomic simple cpu but the problem here is that all >>> stats are cleared up at the end. I shall attach an example stat file with >>> this email. In the stat file attached, you may see all the tlb stats >>> cleared. I wish to know the reason why stats are cleared in examples/fs.py >>> >>> I just want to know if there is any way to fasten boot up with an atomic >>> simple cpu or is this normal? My work is basically to change the kernel, >>> compile it, run under gem5 and check the stats. >>> Any kind of suggestions are most appreciated. >>> Thank you. >>> -- >>> Regards, >>> Krishnan. >>> _______________________________________________ >>> gem5-users mailing list -- gem5-users@gem5.org >>> To unsubscribe send an email to gem5-users-le...@gem5.org >>> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >> >> _______________________________________________ >> gem5-users mailing list -- gem5-users@gem5.org >> To unsubscribe send an email to gem5-users-le...@gem5.org >> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > >
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