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Merged
crcrpar merged 4 commits into from
Feb 25, 2025
Merged

build extensions in parallel #1882

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f0df092
build extensions in parallel
yuantailing Feb 20, 2025
d9c3507
fix: setup.py develop supports --parallel
yuantailing Feb 21, 2025
f1ee5b1
update README.md
yuantailing Feb 21, 2025
fd28caf
Update README.md: Remove an `export` command
yuantailing Feb 24, 2025
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update README.md
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@yuantailing
yuantailing committed Feb 21, 2025
commit f1ee5b189f4fad4c4eae219a1d37b033808167ab
9 changes: 8 additions & 1 deletion README.md
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Expand Up @@ -130,11 +130,18 @@ CUDA and C++ extensions via
git clone https://github.com/NVIDIA/apex
cd apex
# if pip >= 23.1 (ref: https://pip.pypa.io/en/stable/news/#v23-1) which supports multiple `--config-settings` with the same key...
pip install -v --disable-pip-version-check --no-cache-dir --no-build-isolation --config-settings "--build-option=--cpp_ext --cuda_ext --parallel 4" ./
pip install -v --disable-pip-version-check --no-cache-dir --no-build-isolation --config-settings "--build-option=--cpp_ext" --config-settings "--build-option=--cuda_ext" ./
# otherwise
pip install -v --disable-pip-version-check --no-cache-dir --no-build-isolation --global-option="--cpp_ext" --global-option="--cuda_ext" ./
```

To reduce the build time of APEX, parallel building can be enhanced via
```bash
export NVCC_APPEND_FLAGS="--threads 4"
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@alpha0422 alpha0422 Feb 24, 2025

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I'd suggest not exporting this env, it affects nvcc globally.

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@yuantailing yuantailing Feb 24, 2025

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Moved it to Temporary Environment Scope

pip install -v --disable-pip-version-check --no-cache-dir --no-build-isolation --config-settings "--build-option=--cpp_ext --cuda_ext --parallel 8" ./
```
When CPU cores or memory are limited, the `--parallel` option is generally preferred over `--threads`. See [pull#1882](https://github.com/NVIDIA/apex/pull/1882) for more details.

APEX also supports a Python-only build via
```bash
pip install -v --disable-pip-version-check --no-build-isolation --no-cache-dir ./
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