Boris,
You have found exactly what my issue is!
I'm running out of a python3 virtual environment created / activated with:
"/tools/Python/python3.9.6/bin/python3 -m venv ~/pyenv396"
"source ~/pyenv396/bin/activate"
The issue is that the virtual environment created in this way does not contain
"python3-config".
prompt> ls ~/pyenv396/bin/python3-config
ls: cannot access /home/avose/pyenv396/bin/python3-config: No such file or
directory
So, the system's version of python3-config is used instead:
prompt> which python3-config
/bin/python3-config
So, it seems creating and using a python virtual environment in the usual way
is not enough for building Gem5. I need to find some other way to get a Python
environment setup that has the needed "python3-config" along with all the
include / header files and libraries needed by Gem5.
Thanks much,
~Aaron Vose
-----Original Message-----
From: Boris Shingarov <shinga...@labware.com>
Sent: Wednesday, June 28, 2023 3:05 AM
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.
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
>>>
>>>
>>> _______________________________________________
>>> gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send
>>> an email to gem5-users-le...@gem5.org
>>
>
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