That's quite odd that it works in SE mode but not FS mode! I would suggest running with --debug-flags=Exec for both and then perform a diff to see how they differ.
Cheers, Jason On Tue, Sep 20, 2022 at 2:45 PM Νικόλαος Ταμπουρατζής < ntampourat...@ece.auth.gr> wrote: > Dear Bobby, > > In QEMU I get the same (correct) results that I get in SE mode > simulation. I get invalid results in FS simulation (in both > riscv-fs.py and riscv-ubuntu-run.py). I cannot access real RISCV > hardware at this moment, however, if you want you may execute my xhpcg > binary (http://kition.mhl.tuc.gr:8000/f/4ca25fdd3c/) with the > following configuration: > > ./xhpcg --nx=16 --ny=16 --nz=16 --npx=1 --npy=1 --npz=1 --rt=0.1 > > Please let me know if you have any updates! > > Best regards, > Nikos > > > Quoting Jason Lowe-Power <ja...@lowepower.com>: > > > Hi Nikos, > > > > I notice you said the following in your original email: > > > > In addition, I used the RISCV Ubuntu image > >> (https://github.com/gem5/gem5-resources/tree/stable/src/riscv-ubuntu), > >> I installed the gcc compiler, compile it (through qemu) and I get > >> wrong results too. > > > > > > Is this saying you get the wrong results is QEMU? If so, the bug is in > GCC > > or the HPCG workload, not in gem5. If not, I would test in QEMU to make > > sure the binary works there. Another way you could test to see if the > > problem is your binary or gem5 would be to run it on real hardware. We > have > > access to some RISC-V hardware here at UC Davis, if you don't have access > > to it. > > > > Cheers, > > Jason > > > > On Tue, Sep 20, 2022 at 12:58 AM Νικόλαος Ταμπουρατζής < > > ntampourat...@ece.auth.gr> wrote: > > > >> Dear Bobby, > >> > >> 1) I use the original riscv-fs.py which is provided in the latest gem5 > >> release. > >> I run the gem5 once (./build/RISCV/gem5.fast -d ./HPCG_FS_results > >> ./configs/example/gem5_library/riscv-fs.py) in order to download the > >> riscv-bootloader-vmlinux-5.10 and riscv-disk-img. > >> After this I mount the riscv-disk-img (sudo mount -o loop > >> riscv-disk-img /mnt), put the xhpcg executable and I do the following > >> changes in riscv-fs.py to boot the riscv-disk-img with executable: > >> > >> image = CustomDiskImageResource( > >> local_path = "/home/cossim/.cache/gem5/riscv-disk-img", > >> ) > >> > >> # Set the Full System workload. > >> board.set_kernel_disk_workload( > >> kernel=Resource("riscv-bootloader-vmlinux-5.10"), > >> disk_image=image, > >> ) > >> > >> Finally, in the gem5/src/python/gem5/components/boards/riscv_board.py > >> I change the last line to "return ["console=ttyS0", > >> "root={root_value}", "rw"]" in order to allow the write permissions in > >> the image. > >> > >> > >> 2) The HPCG benchmark after some iterations calculates if the results > >> are valid or not valid. In the case of FS it gives invalid results. As > >> I see from the results, one (at least) problem is that produces > >> different results in each HPCG execution (with the same configuration). > >> > >> Here is the HPCG output and riscv-fs.py > >> (http://kition.mhl.tuc.gr:8000/d/68d82f3533/). You may reproduce the > >> results in the video if you use the xhpcg executable > >> (http://kition.mhl.tuc.gr:8000/f/4ca25fdd3c/) > >> > >> Please help me in order to solve it! > >> > >> Finally, I get invalid results in the HPL benchmark in FS mode too. > >> > >> Best regards, > >> Nikos > >> > >> > >> Quoting Bobby Bruce <bbr...@ucdavis.edu>: > >> > >> > I'm going to need a bit more information to help: > >> > > >> > 1. In what way have you modified > >> > ./configs/example/gem5_library/riscv-fs.py? Can you attach the script > >> here? > >> > 2. What error are you getting or in what way are the results invalid? > >> > > >> > - > >> > Dr. Bobby R. Bruce > >> > Room 3050, > >> > Kemper Hall, UC Davis > >> > Davis, > >> > CA, 95616 > >> > > >> > web: https://www.bobbybruce.net > >> > > >> > > >> > On Mon, Sep 19, 2022 at 1:43 PM Νικόλαος Ταμπουρατζής < > >> > ntampourat...@ece.auth.gr> wrote: > >> > > >> >> > >> >> Dear gem5 community, > >> >> > >> >> I have successfully cross-compile the HPCG benchmark for RISCV > (Serial > >> >> version, without MPI and OpenMP). While it working properly in gem5 > SE > >> >> mode (./build/RISCV/gem5.fast -d ./HPCG_SE_results > >> >> ./configs/example/se.py -c xhpcg --options '--nx=16 --ny=16 --nz=16 > >> >> --npx=1 --npy=1 --npz=1 --rt=0.1'), I get invalid results in FS > >> >> simulation using "./build/RISCV/gem5.fast -d ./HPCG_FS_results > >> >> ./configs/example/gem5_library/riscv-fs.py" (I mount the riscv image > >> >> and put it). > >> >> > >> >> Can you help me please? > >> >> > >> >> In addition, I used the RISCV Ubuntu image > >> >> (https://github.com/gem5/gem5-resources/tree/stable/src/riscv-ubuntu > ), > >> >> I installed the gcc compiler, compile it (through qemu) and I get > >> >> wrong results too. > >> >> > >> >> Here is the Makefile which I use, the hpcg executable for RISCV > >> >> (xhpcg), and a video that shows the results > >> >> (http://kition.mhl.tuc.gr:8000/f/4ca25fdd3c/). > >> >> > >> >> P.S. I use the latest gem5 version. > >> >> > >> >> Thank you in advance! :) > >> >> > >> >> Best regards, > >> >> Nikos > >> >> _______________________________________________ > >> >> gem5-users mailing list -- gem5-users@gem5.org > >> >> To unsubscribe send an email to gem5-users-le...@gem5.org > >> >> > >> > >> > >> _______________________________________________ > >> gem5-users mailing list -- gem5-users@gem5.org > >> To unsubscribe send an email to gem5-users-le...@gem5.org > >> > > > _______________________________________________ > gem5-users mailing list -- gem5-users@gem5.org > To unsubscribe send an email to gem5-users-le...@gem5.org >
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