spconv 2.1.2

spatial sparse convolution

SpConv: Spatially Sparse Convolution Library

spconv is a project that provide heavily-optimized sparse convolution implementation with tensor core support.

Spconv 1.x code. We won't provide any support for spconv 1.x since it's deprecated. use spconv 2.x if possible.

Breaking changes in Spconv 2.x

Spconv 1.x users NEED READ THIS before using spconv 2.x.

Spconv 2.1 vs Spconv 1.x

• spconv now can be installed by pip. see install section in readme for more details.
• Microsoft Windows support (only windows 10 has been tested).
• fp32 (not tf32) training/inference speed is increased (+50~80%)
• fp16 training/inference speed is greatly increased when your layer support tensor core (channel size must be multiple of 8).
• int8 op is ready, but we still need some time to figure out how to run int8 in pytorch.
• doesn't depend on pytorch binary.
• since spconv 2.x doesn't depend on pytorch binary (never in future), it's impossible to support torch.jit/libtorch inference.

Spconv 2.1 vs 1.x speed:

	1080Ti Spconv 1.x F32	1080Ti Spconv 2.0 F32	3080M* Spconv 2.1 F16
27x128x128 Fwd	11ms	5.4ms	1.4ms

* 3080M (Laptop) ~= 3070 Desktop

Usage

Firstly you need to use import spconv.pytorch as spconv in spconv 2.x.

Then see this.

Don't forget to check performance guide.

Install

You need to install python >= 3.7 first to use spconv 2.x.

You need to install CUDA toolkit first before using prebuilt binaries or build from source.

You need at least CUDA 10.2 to build and run spconv 2.x. We won't offer any support for CUDA < 10.2.

Prebuilt

We offer python 3.7-3.10 and cuda 10.2/11.1/11.3/11.4 prebuilt binaries for linux (manylinux) and windows 10/11.

We will provide prebuilts for CUDA versions supported by latest pytorch release. For example, pytorch 1.10 provide cuda 10.2 and 11.3 prebuilts, so we provide them too.

For Linux users, you need to install pip >= 20.3 first to install prebuilt.

CUDA 11.1 will be removed in spconv 2.2 because pytorch 1.10 don't provide prebuilts for it.

pip install spconv for CPU only (Linux Only). you should only use this for debug usage, the performance isn't optimized due to manylinux limit (no omp support).

pip install spconv-cu102 for CUDA 10.2

pip install spconv-cu111 for CUDA 11.1

pip install spconv-cu113 for CUDA 11.3 (Linux Only)

pip install spconv-cu114 for CUDA 11.4

NOTE It's safe to have different minor cuda version between system and conda (pytorch) in Linux. for example, you can use spconv-cu114 with anaconda version of pytorch cuda 11.1 in a OS with CUDA 11.2 installed.

Build from source for development (JIT, recommend)

The c++ code will be built automatically when you change c++ code in project.

For NVIDIA Embedded Platforms, you need to specify cuda arch before build: export CUMM_CUDA_ARCH_LIST="7.2" for xavier.

Linux

0. uninstall spconv and cumm installed by pip
1. install build-essential, install CUDA
2. git clone https://github.com/FindDefinition/cumm, cd ./cumm, pip install -e .
3. git clone https://github.com/traveller59/spconv, cd ./spconv, pip install -e .
4. in python, import spconv and wait for build finish.

Windows

0. uninstall spconv and cumm installed by pip
1. install visual studio 2019 or newer. make sure C++ development component is installed. install CUDA
2. set powershell script execution policy
3. start a new powershell, run tools/msvc_setup.ps1
4. git clone https://github.com/FindDefinition/cumm, cd ./cumm, pip install -e .
5. git clone https://github.com/traveller59/spconv, cd ./spconv, pip install -e .
6. in python, import spconv and wait for build finish.

Build wheel from source (not recommend, this is done in CI.)

You need to rebuild cumm first if you are build along a CUDA version that not provided in prebuilts.

Linux

1. install build-essential, install CUDA
2. run export SPCONV_DISABLE_JIT="1"
3. run pip install pccm cumm wheel
4. run python setup.py bdist_wheel+pip install dists/xxx.whl

Windows

1. install visual studio 2019 or newer. make sure C++ development component is installed. install CUDA
2. set powershell script execution policy
3. start a new powershell, run tools/msvc_setup.ps1
4. run $Env:SPCONV_DISABLE_JIT = "1"
5. run pip install pccm cumm wheel
6. run python setup.py bdist_wheel+pip install dists/xxx.whl

Roadmap for Spconv 2.2-2.3:

• TensorFormat32 support for faster fp32 training when you use NVIDIA Geforce RTX 30x0/Tesla A100/Quadro RTX Ax000 (2.2)
• change implicit gemm weight layout from KRSC to RSKC to make sure we can use native algorithm with implicit gemm weight. (2.2)
• documents (2.2)
• Ampere feature support (2.3)
• pytorch int8 inference, and QAT support (2.3)

TODO in Spconv 2.x

• Ampere (A100 / RTX 3000 series) feature support (work in progress)
• torch QAT support (work in progress)
• TensorRT (torch.fx based)
• Build C++ only package
• JIT compilation for CUDA kernels
• Document (low priority)

Note

The work is done when the author is an employee at Tusimple.

LICENSE

Apache 2.0