[BUG]deepspeed/ops/transformer/inference/triton/matmul_ext.py -> df: /root/.triton/autotune: No such file or directory

[joe0731]

Describe the bug
When executing operations related to deepspeed/ops/transformer/inference/triton/matmul_ext.py (e.g., running grep is_nfs_path on this file) or launching DeepSpeed-based tasks, an error is thrown: df: /root/.triton/autotune: No such file or directory. This suggests the script is attempting to check the existence or properties of the /root/.triton/autotune path, but the directory does not exist, causing a failure in the file system check (likely via df command).

To Reproduce
Steps to reproduce the behavior:

1. Navigate to the DeepSpeed installation directory, e.g., cd /usr/local/lib/python3.12/dist-packages/deepspeed/ops/transformer/inference/triton/
2. Run grep is_nfs_path matmul_ext.py to search for the relevant code
3. Alternatively, launch a DeepSpeed inference task that triggers the matmul_ext.py module (e.g., using Triton-based matrix multiplication)
4. Observe the error message: df: /root/.triton/autotune: No such file or directory

Expected behavior
The operation (either grep or the DeepSpeed task) should complete without errors. If the /root/.triton/autotune directory is required for Triton's autotuning functionality, the script should either automatically create it or handle its absence gracefully without throwing a df command error.

ds_report output

[Please run `ds_report` and paste the output here. Example:  
--------------------------------------------------  
DeepSpeed C++/CUDA extension op report  
--------------------------------------------------  
NOTE: Ops not installed will be just-in-time (JIT) compiled at runtime if needed.  
--------------------------------------------------  
DeepSpeed general environment info:  
torch version ............... 2.1.0+cu118  
torch cuda version ........... 11.8  
torch hip version ............ None  
nvcc version ................. 11.8  
deepspeed version ............ 0.10.0  
deepspeed wheel compiled w. ... torch 2.1, cuda 11.8  
--------------------------------------------------  
...  
]  

Screenshots
No screenshots applicable; the error is text-based as described.

System info (please complete the following information):

• OS: Ubuntu 22.04 (or relevant version)
• GPU count and types: [e.g., 1x NVIDIA A100, or specify your GPU model]
• Interconnects (if applicable): None (single machine)
• Python version: 3.12.x
• Additional info: DeepSpeed installed via pip in a system-wide Python 3.12 environment.

Launcher context
Launching experiments with the deepspeed launcher (e.g., deepspeed --num_gpus=1 my_script.py).

Docker context
Not using Docker; running directly on the host system. (If using Docker, specify the image: e.g., nvcr.io/nvidia/pytorch:23.10-py3)

Additional context
The error appears to stem from code in matmul_ext.py that checks if /root/.triton/autotune is on an NFS filesystem (via df command), but the directory does not exist. Manually creating the directory (mkdir -p /root/.triton/autotune) temporarily resolves the error, suggesting the script assumes this path exists but does not create it.