Which Python interpreter to embed is a compile-time decision,
generally controlled by python3-config / python-config. What does
python3-config --ldflags
say? Also, what does 'ldd -r gem5.opt' say about libpython?
You may also want to search for PYTHON_CONFIG in SConstruct to
understand how scons selects the libpython to link to.
On 6/27/23 19:40, Aaron Vose wrote:
It does look like the python environment doesn't seem to contain "pydot"; this
is from running gem5:
*** ModuleNotFoundError: No module named 'pydot'
(Pdb) import sys
(Pdb) sys.version_info
sys.version_info(major=3, minor=6, micro=8, releaselevel='final', serial=0)
It seems like the Python environment that Gem5 is using above doesn't match the Python
environment I see from running "python3" manually on the command line:
import sys
sys.version_info
sys.version_info(major=3, minor=9, micro=6, releaselevel='final', serial=0)
When I'm building Gem5, I attempt to specify a python version by running the
following:
python3 `which scons` build/RISCV/gem5.opt -j 16
In this environment, python3 says (python3 --version): "Python 3.9.6". That's
what I want, and that one has pydot available.
Maybe my SCons version is influencing things and forcing Python v3.6.8 somehow?
Cheers,
~Aaron Vose
-----Original Message-----
From: Aaron Vose
Sent: Tuesday, June 27, 2023 7:19 PM
To: Boris Shingarov <shinga...@labware.com>; The gem5 Users mailing list
<gem5-users@gem5.org>
Subject: RE: [gem5-users] Gem5 with pydot
Have you rebuilt gem5?
After rebuilding Gem5, the changes to the "dot_writer.py" are activated. I'll
poke around here and see what I can find.. not sure what's wrong with it yet.
Thanks much,
~Aaron Vose
-----Original Message-----
From: Aaron Vose
Sent: Tuesday, June 27, 2023 7:01 PM
To: Boris Shingarov <shinga...@labware.com>; The gem5 Users mailing list
<gem5-users@gem5.org>
Subject: RE: [gem5-users] Gem5 with pydot
Have you rebuilt gem5?
I have rebuilt after installing pydot, but I don't remember if I did after changing the
"dot_writer.py" file.
I will rebuild again just to be sure.
Thanks much for your help with this.
Cheers,
~Aaron Vose
-----Original Message-----
From: Boris Shingarov <shinga...@labware.com>
Sent: Tuesday, June 27, 2023 6:58 PM
To: Aaron Vose <av...@maxlinear.com>; The gem5 Users mailing list
<gem5-users@gem5.org>
Subject: Re: [gem5-users] Gem5 with pydot
This email was sent from outside of MaxLinear.
Have you rebuilt gem5?
On 6/27/23 18:52, Aaron Vose wrote:
Boris,
Thanks much for your suggestion! It's very interesting, because I've done as you
suggested, and it doesn't seem to drop me into a debug shell at all. I even changed those
lines in "dot_writer.py" to be the following, and I don't see any of the print
messages I added. It doesn't print any of my new additions at all:
try:
import pydot
print("!!avose: Have PyDot!");
except:
print("!!avose: Miss PyDot!");
pydot = False
I wonder if support for pydot is somehow disabled elsewhere? When I try the above code in a new
file called "test_pydot.py", I do see what I would expect: "!!avose: Have
PyDot!".
Thanks again,
~Aaron Vose
-----Original Message-----
From: Boris Shingarov <shinga...@labware.com>
Sent: Monday, June 26, 2023 3:22 PM
To: The gem5 Users mailing list <gem5-users@gem5.org>
Cc: Aaron Vose <av...@maxlinear.com>
Subject: Re: [gem5-users] Gem5 with pydot
This email was sent from outside of MaxLinear.
I would debug it like this:
Near the beginning of dot_writer.py, there is:
try:
import pydot
except:
pydot = False
Replace the "pydot = False" with "import pdb; pdb.set_trace()".
This will drop you into a debug shell where you can investigate why "import
pydot" failed.
On 6/26/23 14:30, Aaron Vose via gem5-users wrote:
All my runs (and many, many examples I see online) have the following
warning message:
“warn: No dot file generated. Please install pydot to generate the
dot file and pdf.”
However, I know I have pydot installed; see the following:
prompt> pip install pydot
Requirement already satisfied: pydot in
/home/avose/pyenv396/lib/python3.9/site-packages (1.4.2)
Requirement already satisfied: pyparsing>=2.1.4 in
/home/avose/pyenv396/lib/python3.9/site-packages (from pydot) (3.1.0)
I even went back and rebuilt the entire Gem5 again from scratch after
I made sure pydot was installed. I made sure I built Gem5 using the
same environment (/home/avose/pyenv396) in which I installed pydot,
and I still see this warning, and I don’t get any dot output.
Does anyone else have a similar problem or any advice on how to fix this?
Thanks much,
~Aaron Vose
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