Simulate the posit testsuite Always waiting

[wwwuxy]

when i run ‘LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libstdc++.so.6 make sim elf-bin=$RISCV/riscv64-unknown-elf/bin/pk target-options=posit_testsuite_llvm.elf batch-mode=1’，I have been stuck in “# Time: 250 ns while running the test Iteration: 2 Instances:/ariane_tb/dut/i'ariane/iucva6/ex_stage_i/pa_gen/pa_top_i/pa_gen/genblk3/genblk3/paul64_st_i/PositEncoder " Here，and operated for 12 hours，i think is something wrong. my chip is R7-9700X.

[davidmallasen]

Try running without batch-mode=1. That way the questasim GUI will open and you can debug better. Check the compiler/compiled code to see if there is a missmatch with the PERCIVAL/Big-PERCIVAL versions. With Big-PERCIVAL, if you are using posit64 you will need to run the posit64_testsuite_llvm instead of posit_testsuite_llvm.

[wwwuxy]

Can you tell me the relevant configuration(compiler/compiled) requirements ? I couldn't find them in the readme. Thank you very much~ And I successfully ran it on Ubuntu 20.04 before, but now it fails on 22.04. Is there any correlation?

[davidmallasen]

If it worked before, then the compiler should be the same. RV64 from here: https://github.com/artecs-group/llvm-xposit
Then with Big-PERCIVAL you have either posit32 or posit64. You can select that here:

PERCIVAL/core/include/ariane_pkg.sv

Line 189 in fd1d154

localparam POSLEN = 64;

For posit64 you have to compile and run posit64_testsuite_llvm and for posit32 you have to compile and run posit32_testsuite_llvm.

Have you tried running without batch-mode=1 and debugged using the questasim GUI?
I am not aware if there have to be any changes when using this in Ubuntu 22.04 instead of 20.04. If you find any, please let me know so I can update in the README.

[wwwuxy]

thanks,i compile and run posit64_testsuite_llvm,and get this fault, can you give me some suggestions? thank you very much~
!

[davidmallasen]

What was the previous error that you solved?

For this, what version of questasim are you using? Also, you may want to try updating the riscv-dbg subrepo. It doesn't seem to be an issue with the posit part of PERCIVAL.

[wwwuxy]

Thanks for your reply~ my Questasim version is 23.1.1，the download URL is https://www.intel.com/content/www/us/en/software-kit/825244/intel-quartus-prime-standard-edition-design-software-version-23-1-1-for-linux.html，the previous error is issu #5

[davidmallasen]

Thanks for opening the other issue, please do that when you encounter a problem and find the solution so I can update the README.

I haven't tried that version of Questasim (I have an older one). I would try updating the riscv-dbg subrepo and meanwhile I ping some of my colleagues to see if they encountered the same issue @albertodbg @MarioInf-UCM

[wwwuxy]

thanks，I use questasim2021 to run make sim elf-bin=posit64_testsuite_llvm.elf QUESTASIM_FLAGS="-novopt -suppress 12110" batch-mode=1，then meet the same fault, I think the version is no matter

[albertodbg]

I have not experienced such an error. I am using Questasim 2023.4, but it is Siemens Questasim, not Intel's. BTW, could it be that your license does not allow to run more than 10^7 cycles? I remember in the past that somehting similar happened with the student versions of Modelsim.

[wwwuxy]

Thanks for your reply, I get license fromhttps://licensing.intel.com/psg/s/sales-signup-evaluationlicenses?language=en_US, In fact, I am a student now，if i run make sim elf-bin=$RISCV/riscv64-unknown-elf/bin/pk target-options=posit64_testsuite_llvm.elf batch-mode=1, it will operated for 12 hours...As the picture of the title shows

[davidmallasen]

Have you tried updating the riscv-dbg subrepo as I suggested? The error seems to be there, not in PERCIVAL/CVA6

[wwwuxy]

yean，I updating the riscv-dbg，but meet other 4 faults..

[davidmallasen]

Maybe some more things have to be adapted, I'm not sure about that. For now, we haven't replicated this using our setup. I can point you to a similar issue that occurred some time ago:
openhwgroup/cva6#842
openhwgroup/cva6#800
pulp-platform/riscv-dbg#102