gem-5 installation error: Can't find a working Python installation

[Harsh Vardhan Kumar]

System description:

Ubuntu 16.04

Python 3.8.5

scons 4.1.0

gcc 9.3.0

Followed all the instructions given at here .

(base) harsh@isaac:~/gem5$ scons build/X86/gem5.opt -j 65

scons: Reading SConscript files ...

Checking for linker -Wl,--as-needed support... yes

Checking for pkg-config package protobuf... yes

Checking for compiler -gz support... yes

Checking for linker -gz support... yes

Info: Using Python config: python3-config

Checking for C header file Python.h... yes

Checking for C library python3.8... yes

Checking for C library crypt... yes

Checking for C library pthread... yes

Checking for C library dl... yes

Checking for C library util... yes

Checking for C library rt... yes

Checking for C library m... yes

Checking Python version... no

Error: Can't find a working Python installation

Any help would be appreciated. Thank you!

Harsh

[Jason Lowe-Power]

Hi Harsh,

This error is because python3-config is not in your path. This could be because you haven't installed the python-dev package or your python3-config binary path is different than normal. You can specify the python config binary with PYTHON_CONFIG=<path> on the same line as the scons command (e.g., ` scons build/X86/gem5.fast PYTHON_CONFIG=/usr/bin/python3-config`)

Cheers,

Jason

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[Harsh Vardhan Kumar]

Hi,

I'm afraid, there is an error in the build process.

cc1plus: out of memory allocating 8168 bytes after a total of 55078912 bytes
scons: *** [build/X86/arch/x86/generated/inst-constrs.o] Error 1
scons: building terminated because of errors.

The installation was tried on a cloud machine (Intel DevCloud). I checked the memory usage. Only 8.5 GB out of 15GB is used. Such is the case with swap file. I checked for potential solutions, this solution by Intel  talks about windows machine. The cloud machine I'm working on, is ubuntu 18.04

Please let me know if any fixes are needed?

Regards,

Harsh

[Jason Lowe-Power]

Hi Harsh,

You're running out of memory. There isn't exactly a solution. You can do a few things to try to get around this issue:

1. Run on a machine with more memory.

2. Compile with less concurrency (e.g., -j1 instead of -j4)

3. Disable LTO (--no-lto, IIRC)

Cheers,

Jason

To view this discussion on the web visit https://groups.google.com/d/msgid/gem5-gpu-dev/b99233d6-98c5-46a6-8731-48f9dbc01cccn%40googlegroups.com.

[Harsh Vardhan Kumar]

Hey, thanks again. I moved to another system and the installation was successful.

However, I was wondering whether a python script can be provided in the gem5.opt --cmd option (where we provide pre-compiled binaries). I tried doing --cmd=/usr/bin/python3 -o script.py, however, it did not produce any stats.

Harsh