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Version: v0.1.9

Command Line Tool

Author: Shenggui Li



Colossal-AI provides command-line utilities for the user. The current command line tools support the following features.

  • verify Colossal-AI build
  • launch distributed jobs
  • tensor parallel micro-benchmarking

Check Installation​

To verify whether your Colossal-AI is built correctly, you can use the command colossalai check -i. This command will inform you information regarding the version compatibility and cuda extension.

Check Installation Demo


To launch distributed jobs on single or multiple nodes, the command colossalai run can be used for process launching. You may refer to Launch Colossal-AI for more details.

Tensor Parallel Micro-Benchmarking​

As Colossal-AI provides an array of tensor parallelism methods, it is not intuitive to choose one for your hardware and model. Therefore, we provide a simple benchmarking to evaluate the performance of various tensor parallelisms on your system. This benchmarking is run on a simple MLP model where the input data is of the shape (batch_size, seq_length, hidden_size). Based on the number of GPUs, the CLI will look for all possible tensor parallel configurations and display the benchmarking results. You can customize the benchmarking configurations by checking out colossalai benchmark --help.

# run on 4 GPUs
colossalai benchmark --gpus 4

# run on 8 GPUs
colossalai benchmark --gpus 8

Only single-node benchmarking is supported currently.