Failing to generate wavefrom

[StyleDiablo]

The problem i am experiencing is that everytime I compile the hardware with the command trace=1 to generate waveform traces the program compiles but after that when I run the simulation with a random binary loaded the program crashes with the message make: *** [Makefile:208: simv] Segmentation fault (core dumped) . If I dont use the trace=1 the program runs fine. I also have a problem generating the vector trace. I am not sure what exact command am i supposed to use. The insrtuctions say to compile a program like this make bin/${program}.ideal but I cant figure out what the "{program}" is supposed to be. Is it a binary like rv64uv-ara-vxor or something else? Can anyone please help with these problems? Thank you.

[mp-17]

Hello @StyleDiablo, also other users reported a similar problem. What we saw is that the version of Verilator can be determinant. Which version are you using now, the default one of the repo? Have you already tried to compile the latest verilator version? I will try as well and let you know!

Best, Matteo

[A-Eren]

Have same problem with Verilator 4.214 2021-10-17 rev v4.214

[mp-17]

I will soon bump Verilator to version 5, this should solve the problem.

If you want to go ahead and try, here's the commit (you will need help2man to install it): https://github.com/pulp-platform/ara/pull/235/commits/384dbb3be226854f8860cccdafddee006dcd1c7c

[mp-17]

We merged the commit with Verilator 5 in main. Any luck with it?

[quswarabid]

Encountering the similar problem on latest ARA:main

Got advised to change the optimization flag and it fixes the problem but now the simulation is taking forever to finish (Related Issue #260)

[quswarabid]

I found this update of no good use. I bumped the verilator version back to v4.214 and it worked out for me.

[llhe110]

Dear @StyleDiablo, I also encountered this problem, how do you deal with it now?

llhe@llhe-virtual-machine:~/rscratch/workspace/ara/ara/hardware$ app=hello_world make simv trace=1
Makefile:84: "Specified QuestaSim version (questa-2021.2) not found in PATH /home/llhe/rscratch/cadtools/QuestaSim2021.2.1Linux/install/questasim/RUVM_2021.2:/home/llhe/rscratch/cadtools/QuestaSim2021.2.1Linux/install/questasim/linux_x86_64:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/llhe/rscratch/cadtools/interlijIDEA/idea-IC-232.10227.8/bin"
build/verilator/Vara_tb_verilator -t -l ram,/home/llhe/rscratch/workspace/ara/ara/apps/bin/hello_world,elf
Program header number 0 in `/home/llhe/rscratch/workspace/ara/ara/apps/bin/hello_world' low is 80000000
Program header number 0 in `/home/llhe/rscratch/workspace/ara/ara/apps/bin/hello_world' high is 80000fbd
Program header number 1 in `/home/llhe/rscratch/workspace/ara/ara/apps/bin/hello_world' high is 8000139f
Program header number 2 in `/home/llhe/rscratch/workspace/ara/ara/apps/bin/hello_world' high is 800013c7
Program header number 3 in `/home/llhe/rscratch/workspace/ara/ara/apps/bin/hello_world' is not of type PT_LOAD; ignoring.
Set `ram TOP.ara_tb_verilator.dut.i_ara_soc.i_dram 10 0x80000000 0x100000 write with offset: 0x0 write with size: 0x13c8
Simulation of Ara
=================

Tracing can be toggled by sending SIGUSR1 to this process:
$ kill -USR1 15d8
make: *** [Makefile:232: simv]

[quswarabid]

@llhe110 I bumped the verilator version back to v4.214 and it worked out for me. To do that, edit VERIL_VERSION in ara/Makefile. Then run make verilator in ara/ to build verilator, and make clean && make verilate trace=1 in ara/hardware again.

[DuzaBF]

Have the same issue with getting traces with Verilator on commit 8fc5ebd17d04a8e4608a987834884985d27dea2b . Was able to resolve it by verilating without optimization, changing the -O3 to -O0 in the hardware/Makefile

diff --git a/hardware/Makefile b/hardware/Makefile
index 1f1c8c76..5619f803 100644
--- a/hardware/Makefile
+++ b/hardware/Makefile
@@ -189,7 +189,7 @@ $(veril_library)/V$(veril_top): $(config_file) Makefile ../Bender.yml $(shell fi
        $(veril_path)/verilator -f $(veril_library)/bender_script_$(config)           \
   -GNrLanes=$(nr_lanes)                                                         \
   -GVLEN=$(vlen)                                                                \
-  -O3                                                                           \
+  -O0                                                                          \
   --hierarchical \
   -Wno-fatal                                                                    \
   -Wno-PINCONNECTEMPTY                                                          \

[haipnh]

I was on commit a6436df6, used Verilator v5.012, applied the patch, changed -O3 to -O0 in hardware/Makefile, and was able to dump the waveform into .fst file. Another test that I've made is any optimization flag different than -O0 will cause Segmentation fault (core dumped).