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
>>
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