I had been running version 22, and I had also run the bootcamp 2022 example for 
demonstrating MESI_Two_Level protocol. After I upgraded to version 23.0.0.1, I 
first noticed that I had trouble compiling the example. After finding a work 
around, to generate gem5.opt, The program seems to be missing the parameter 
processor (which was not needed when I ran version 22. I can use some 
suggestions on how to run this example with the new version (What has changed?

The example where it worked in version 22, but not in version 23:

scons build/NULL_MESI_Two_Level/gem5.opt --default=NULL PROTOCOL=MESI_Two_Level 
-j16

The program gave me an error:

scons build/NULL_MESI_Two_Level/gem5.opt --default=NULL PROTOCOL=MESI_Two_Level 
-j16
scons: Reading SConscript files ...

You're missing the pre-commit/commit-msg hooks. These hook help to ensure your
code follows gem5's style rules on git commit and your commit messages follow
our commit message requirements. This script will now install these hooks in
your .git/hooks/ directory.
Press enter to continue, or ctrl-c to abort:
An unexpected error has occurred: PermissionError: [Errno 13] Permission 
denied: '/.cache'
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/error_handler.py", 
line 73, in error_handler
    yield
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/main.py", line 367, 
in main
    store = Store()
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/store.py", line 71, 
in __init__
    os.makedirs(self.directory, exist_ok=True)
  File "/usr/lib/python3.8/os.py", line 213, in makedirs
    makedirs(head, exist_ok=exist_ok)
  File "/usr/lib/python3.8/os.py", line 223, in makedirs
    mkdir(name, mode)
PermissionError: [Errno 13] Permission denied: '/.cache'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/pre-commit", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/main.py", line 433, 
in main
    raise AssertionError(
  File "/usr/lib/python3.8/contextlib.py", line 131, in __exit__
    self.gen.throw(type, value, traceback)
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/error_handler.py", 
line 81, in error_handler
    _log_and_exit(msg, ret_code, e, traceback.format_exc())
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/error_handler.py", 
line 31, in _log_and_exit
    storedir = Store().directory
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/store.py", line 71, 
in __init__
    os.makedirs(self.directory, exist_ok=True)
  File "/usr/lib/python3.8/os.py", line 213, in makedirs
    makedirs(head, exist_ok=exist_ok)
  File "/usr/lib/python3.8/os.py", line 223, in makedirs
    mkdir(name, mode)
PermissionError: [Errno 13] Permission denied: '/.cache'
It is strongly recommended you install the pre-commit hooks before working with 
gem5. Do you want to continue compilation (y/n)?
y
Error: No non-leaf 'build' dir found on target path. 
/home/nbeser1/gem5-bootcamp-env/gem5/-j16

However if I run the following:

python3 `which scons` build/NULL_MESI_Two_Level/gem5.opt --default=NULL 
PROTOCOL=MESI_Two_Level -j16

The program generates gem5.opt

Unfortunately, I also get the following error when I try to run gem5.opt:


./gem5/build/NULL_MESI_Two_Level/gem5.opt 
materials/using-gem5/04-cache-models/simple_cache_run.py 2 MESITwoLevel 512MB
gem5 Simulator System.  https://www.gem5.org
gem5 is copyrighted software; use the --copyright option for details.

gem5 version 23.0.0.1
gem5 compiled Jul 23 2023 13:29:06
gem5 started Jul 23 2023 13:34:05
gem5 executing on d8fae668e22d, pid 42880
command line: ./gem5/build/NULL_MESI_Two_Level/gem5.opt 
materials/using-gem5/04-cache-models/simple_cache_run.py 2 MESITwoLevel 512MB

TypeError: __init__() got an unexpected keyword argument 'processor'

At:
  materials/using-gem5/04-cache-models/simple_cache_run.py(96): <module>
  src/python/m5/main.py(629): main



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