developed by Marcel Köster
A modern, lightweight & fast GPU compiler for high-performance .Net programs
ILGPU is a new JIT (just-in-time) compiler for high-performance GPU programs (also known as kernels) written in .Net-based languages.
ILGPU is completely written in C# without any native dependencies which allows you to write GPU programs that are truly portable.
It combines the convenience of C++ AMP with the high performance of CUDA.
Functions in the scope of kernels do not have to be annotated (e.g. default C# functions) and are allowed to work on value types.
All kernels (including all hardware features like shared memory, atomics and warp shuffles) can be executed and debugged on the CPU using the integrated multi-threaded CPU accelerator.
And the best feature: it's free! ILGPU is released under the University of Illinois/NCSA Open Source License.
ILGPU is a free and non-sponsored project. It is being developed by a professional and passionate compiler, GPU and computer graphics developer. Support the project with contributions or some small donations in order to speed up the development process and to keep the project alive.
A new major release of the ILGPU compiler is available.
The new stable version offers significant performance improvements of the generated kernel programs and contains critical resource deallocation fixes. It is strongly recommended to upgrade to this version as soon as possible to avoid resource and GC related deallocation issues. For more information, please refer to the change log for more information.
For a more detailed list of changes and updates refer to the release notes.
Special thanks to MoFtZ, Ruberik and jgiannuzzi for contributing to this release.
Special thanks to the whole ILGPU community for providing feedback, submitting issues and new feature requests.
The ILGPU community will try to provide immediate help, feedback and suggestions via Discord ASAP. Log on to the server and you can get started right away. Alternatively, you can always send an email via the contact page.
There will be a weekly talk-to-the-dev(s) meeting on the Discord server every Thursday from 11-12pm Berlin Time, 7-8am Canberra Time (+1 day), 5-6pm New York Time, 2-3pm California Time. Tthe first meeting using the updated time slot will take place on August 6th 2020. Don't hesitate to join the meeting if you have any questions or suggestions or just want to talk to one of the developers (including me).
Starting in February 2021, an updated ILGPU version will be available every 6-8 weeks. As the community grows, new features will be explicitly tracked on the GitHub issues page and are linked to their appropriate milestone to which they belong. Each new feature found on this page and is marked with a specific difficulty level (beginner, intermediate and advanced). At the beginning, we strongly recommend that you a closer look at the beginner issues if you plan to contribute to the ILGPU project.
A new public Discord server has been created.
I've just created a new Discord server to simplify communication: https://discord.gg/KTvqYZP. For general questions or feature requests, I recommend using the new Discord server.
High performance kernel compilation, dispatch and execution times. Furthermore, type-safe kernel delegates avoid boxing.
Use the power of C# or VB.Net to write high-level kernels and execute them on the GPU. No need to program C++, Cuda or OpenCL.
Single- or multi-threaded execution of kernels on the CPU. This is also useful for debugging or emulation of specific target platforms.
High-level kernel debugging using your favorite .Net debugger. Furthermore, the single-threaded execution feature allows to focus on the algorithm instead of the parallelism.
Functions do not have to be annotated in order to use them in the scope of kernels.
Compile your applications for any cpu. ILGPU will automatically adjust everything else for X86 or X64 platforms.
Focus on the algorithm and not on the details. Implicitly grouped kernels let you implement high-level kernels without paying attention to low-level index computations or tiling.
Multi-dimensional index types simplify address computations and kernel writing.
No pointer arithmetic and dramatically simplified index computations due to views to memory regions.
Support for shared (scratch-pad) memory in kernels via array views. Static or dynamic allocation of shared memory is supported.
Easy access to atomic functions and low-level-intrinsics like warp shuffles. All functions are supported during CPU debugging.
Default math functions and operations are mapped to high-performance math functions. Furthermore, there is support for fast math and forced 32bit math to avoid doubles.
Exceptions require support for exception handlers and a limited support for reference types. Changes of the "intended" control flow (which can be caused by exceptions) are currently not supported. However, there might be a conversion phase in the future that converts several exceptions into debug assertions.
Debug assertions are supported on all accelerators and can be enabled via one of the Context flags.
Reference types are currently not supported. However, a limited support for reference types will be added in the future. This will also allow the implementation of delegates.
Lambda functions (or delegates in general) are currently not supported since they require a limited support for reference types and custom code-transformation passes. Support for lambda functions will be added in the future.
There is basic support for hardware-based kernel debugging and profiling. However, CPU-based kernel debugging is recommended in all cases due to the advanced debugging and testing capabilities.
The new ILGPU version supports .Net 4.7 and .Net Standard 2.1 (e.g. .Net Core 3.1/.Net 5.0).
ILGPU supports .Net Core, which allows writing portable .Net applications. Since ILGPU is written in C# and does not rely on native libraries in the current version, kernels can be run on all .Net Core/.Net 5 compatible platforms. This allows you to compile your application (including GPU code) only once.