Hello Taeklim, your problem sounds to me the same as the one I keep having. In my case, I searches a bit more and then I found that as you said instruction count does not increase because execution falls into an infinite loop of the same page fault (Microcode_ROM related.) I give you here the link to the thread of my emails when I first asked about the problem : [ https://www.mail-archive.com/gem5-users@gem5.org/msg16145.html | https://www.mail-archive.com/gem5-users@gem5.org/msg16145.html ] Unfortunately, I do not have the solution , but it would be very nice if you could also just use the flags I mention (--debug-flags=Exec,LocalApic,Faults) to see if the problem is related with the same issue. Looking forward for any feedback.
Regards, -- Kleovoulos Kalaitzidis Doctorant - Équipe PACAP Centre de recherche INRIA Rennes - Bretagne Atlantique Bâtiment 12E, Bureau E321, Campus de Beaulieu, 35042 Rennes Cedex, France > From: "Taeklim Kim" <taek...@uci.edu> > To: "gem5 users mailing list" <gem5-users@gem5.org> > Sent: Thursday, December 20, 2018 1:12:38 AM > Subject: [gem5-users] Problem on restoring checkpoint while using O3CPU in > Full > System mode > Hi all, > I'm currently using X86 Full system mode. > Firstly, I tried to make a checkpoint while running SPEC CPU by > AtomicSimpleCPU, > and I got it. After that, I did restoring checkpoint by adding an option > '--cpu-type=DerivO3CPU', and also added the cache option. > However, if I run(restoring) by O3CPU, the simulation didn't keep running, it > just hanged and nothing changed. I also added some 'printf()' at > 'src/cpu/o3/cpu.cc', 'FullO3CPU<Impl>::instDone()' to check the count of > instruction, nothing changed. > I'm also tried just restoring to Atomic, not O3, but in this case, the > simulation works fine. I'm not sure why this is hanging when I restore O3. > Below is the command line that I used for restoring O3. > /home/workspace/gem5_fs/build/X86/gem5.opt > /home/workspace/gem5_fs/configs/example/fs.py -n 1 > --disk-image=/home/workspace/fs_image/disks/ubuntu-16.04-v3.6.img > --kernel=/home/taeklim/workspace/fs_image/binaries/vmlinux-4.14.53-prof > --sys-clock=1GHz --cpu-clock=4GHz --mem-size=4096MB --mem-type=DDR3_1600_8x8 > --restore-with-cpu=DerivO3CPU --cpu-type=DerivO3CPU --caches > --checkpoint-dir=/home/workspace/gem5_fs/m5out/ --at-instruction -r > 977530554357000 > Your help will be appreciated. > Best, > Taeklim > ᐧ > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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