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OneAPI (compute acceleration)

{{short description|Open standard for parallel computing}}

{{lowercase title}}

{{otheruses|OneAPI (disambiguation)}}

{{Infobox software

| name = oneAPI

| logo = OneAPI-rgb-3000.png

| logo_caption =

| latest_release_date = {{start date and age|2020|11|13}}

| operating_system = Cross-platform

| platform = Cross-platform

| genre = Open-source software specification for parallel programming

| repo = {{URL|https://github.com/oneapi-src}}

| website = {{official URL}}

}}

oneAPI is an open standard, adopted by Intel,{{sfn|Fortenberry|Tomov|2022|p=22}} for a unified application programming interface (API) intended to be used across different computing accelerator (coprocessor) architectures, including GPUs, AI accelerators and field-programmable gate arrays. It is intended to eliminate the need for developers to maintain separate code bases, multiple programming languages, tools, and workflows for each architecture.{{Cite web|url=https://www.hpcwire.com/2019/12/09/intel-expands-its-silicon-portfolio-and-oneapi-software-initiative-for-next-generation-hpc/|title=Intel Expands its Silicon Portfolio, and oneAPI Software Initiative for Next-Generation HPC|date=2019-12-09|website=HPCwire|language=en-US|access-date=2020-02-11}}{{Cite web|url=https://www.hpcwire.com/2019/11/17/intel-debuts-new-gpu-ponte-vecchio-and-outlines-aspirations-for-oneapi/|title=Intel Debuts New GPU – Ponte Vecchio – and Outlines Aspirations for oneAPI|date=2019-11-18|website=HPCwire|language=en-US|access-date=2020-02-11}}{{Cite web|url=https://www.extremetech.com/computing/302284-sc19-intel-unveils-new-gpu-stack-oneapi-development-effort|title=SC19: Intel Unveils New GPU Stack, oneAPI Development Effort - ExtremeTech|website=www.extremetech.com|access-date=2020-02-11}}{{Cite web|url=https://www.servethehome.com/intel-one-api-to-rule-them-all-is-much-needed/|title=Intel One API to Rule Them All Is Much Needed to Expand TAM|last=Kennedy|first=Patrick|date=2018-12-24|website=ServeTheHome|language=en-US|access-date=2020-02-11}}

oneAPI competes with other GPU computing stacks: CUDA by Nvidia and ROCm by AMD.

Specification

The oneAPI specification extends existing developer programming models to enable multiple hardware architectures through a data-parallel language, a set of library APIs, and a low-level hardware interface to support cross-architecture programming. It builds upon industry standards and provides an open, cross-platform developer stack.{{cite web |url=https://www.oneapi.io/spec/ |title=oneAPI Specification |last= |first= |date= |website=oneAPI |archive-url= |archive-date= |access-date=}}{{Cite web|date=2021-03-23|title=Preparing for the Arrival of Intel's Discrete High-Performance GPUs|url=https://www.hpcwire.com/2021/03/23/preparing-for-the-arrival-of-intels-discrete-high-performance-gpus/|access-date=2021-03-29|website=HPCwire|language=en-US}}

Data Parallel C++

DPC++{{Cite web|url=https://www.apress.com/gp/data-parallel-c-advanced-chapters-just-released/17382670|title=Data Parallel C++: Mastering DPC++ for Programming of Heterogeneous Systems Using C++ and SYCL|last=|first=|date=|website=Apress|archive-url=|archive-date=|access-date=}}{{Cite web|url=https://insidebigdata.com/2019/12/16/heterogeneous-computing-programming-oneapi-and-data-parallel-c/|title=Heterogeneous Computing Programming: oneAPI and Data Parallel C++|last=Team|first=Editorial|date=2019-12-16|website=insideBIGDATA|language=en-US|access-date=2020-02-11}} is a programming language implementation of oneAPI, built upon the ISO C++ and Khronos Group SYCL standards.{{Cite web|url=https://www.khronos.org/news/permalink/intels-one-api-project-incorporates-sycl|title=The Khronos Group|date=2020-02-11|website=The Khronos Group|language=en|access-date=2020-02-11}} DPC++ is an implementation of SYCL with extensions that are proposed for inclusion in future revisions of the SYCL standard, including: unified shared memory, group algorithms, and sub-groups.{{Cite web|date=2020-06-30|title=Khronos Steps Towards Widespread Deployment of SYCL with Release of SYCL 2020 Provisional Specification|url=https://www.khronos.org/news/press/khronos-releases-sycl-2020-provisional-specification|access-date=2020-07-06|website=The Khronos Group|language=en}}{{Cite web|last=staff|date=2020-06-30|title=New, Open DPC++ Extensions Complement SYCL and C++|url=https://insidehpc.com/2020/06/new-open-dpc-extensions-complement-sycl-and-c/|access-date=2020-07-06|website=insideHPC|language=en-US}}{{Cite web|date=2021-02-09|title=SYCL 2020 Launches with New Name, New Features, and High Ambition|url=https://www.hpcwire.com/2021/02/09/sycl-2020-launches-new-name-new-features/|access-date=2021-02-16|website=HPCwire|language=en-US}}

Libraries

The set of APIs spans several domains, including libraries for linear algebra, deep learning, machine learning, video processing, and others.

class="wikitable"

!Library Name

!Short

Name

!Description

oneAPI DPC++ Library

|oneDPL

|Algorithms and functions to speed DPC++ kernel programming

oneAPI Math Kernel Library

|oneMKL

|Math routines including matrix algebra, FFT, and vector math

oneAPI Data Analytics Library

|oneDAL

|Machine learning and data analytics functions

oneAPI Deep Neural Network Library

|oneDNN

|Neural networks functions for deep learning training and inference

oneAPI Collective Communications Library

|oneCCL

|Communication patterns for distributed deep learning

oneAPI Threading Building Blocks

|oneTBB

|Threading and memory management template library

oneAPI Video Processing Library

|oneVPL

|Real-time video encode, decode, transcode, and processing

The source code of parts of the above libraries is available on GitHub.{{cite web |title=oneAPI-SRC |url=https://github.com/oneapi-src |website=GitHub |language=en}}

The oneAPI documentation also lists the "Level Zero" API defining the low-level direct-to-metal interfaces and a set of ray tracing components with its own APIs.

Hardware abstraction layer

oneAPI Level Zero,{{Cite web|url=https://www.tomshardware.com/news/intel-releases-bare-metal-oneapi-level-zero-specification|title=Intel Releases Bare-Metal oneAPI Level Zero Specification|last=Verheyde 2019-12-08T16:11:19Z|first=Arne|website=Tom's Hardware|date=8 December 2019 |language=en|access-date=2020-02-11}}{{Cite web|url=https://www.phoronix.com/scan.php?page=news_item&px=Intel-oneAPI-Level-Zero|title=Intel's Compute Runtime Adds oneAPI Level Zero Support - Phoronix|website=www.phoronix.com|access-date=2020-03-10}}{{Cite web|url=https://www.phoronix.com/scan.php?page=article&item=intel-level-zero&num=1|title=Initial Benchmarks With Intel oneAPI Level Zero Performance - Phoronix|website=www.phoronix.com|access-date=2020-04-13}} the low-level hardware interface, defines a set of capabilities and services that a hardware accelerator needs to interface with compiler runtimes and other developer tools.

Implementations

Intel has released oneAPI production toolkits that implement the specification and add CUDA code migration, analysis, and debug tools.{{Cite news|date=2020-11-11|title=Intel Champions XPU Vision With oneAPI, Data Center GPUs - SDxCentral|language=en-US|work=SDxCentral|url=https://www.sdxcentral.com/articles/news/intel-champions-xpu-vision-with-oneapi-data-center-gpus/2020/11/|access-date=2020-11-11}}{{Cite web|date=2020-11-11|title=Intel Debuts oneAPI Gold and Provides More Details on GPU Roadmap|url=https://www.hpcwire.com/2020/11/11/intel-debuts-oneapi-gold-and-provides-more-details-on-gpu-roadmap/|access-date=2020-11-11|website=HPCwire|language=en-US}}{{Cite web|last=Moorhead|first=Patrick|title=Intel Announces Gold Release Of OneAPI Toolkits And New Intel Server GPU|url=https://www.forbes.com/sites/patrickmoorhead/2020/12/02/intel-announces-gold-release-of-oneapi-toolkits-and-new-intel-server-gpu/|access-date=2020-12-08|website=Forbes|language=en}} These include the Intel oneAPI DPC++/C++ Compiler,{{Cite web|title=Data Parallel C++ for Cross-Architecture Applications|url=https://www.intel.com/content/www/us/en/develop/tools/oneapi/components/dpc-compiler.html|access-date=2021-10-07|website=Intel|language=en}} Intel Fortran Compiler, Intel VTune Profiler{{Cite web|title=Fix Performance Bottlenecks with Intel® VTune™ Profiler|url=https://www.intel.com/content/www/us/en/develop/tools/oneapi/components/vtune-profiler.html|access-date=2021-10-07|website=Intel|language=en}} and multiple performance libraries.

Codeplay has released an open-source layer{{Cite web|url=https://www.hpcwire.com/2020/02/04/codeplay-open-sources-a-version-of-computecpp-for-nvidia-gpus/|title=Codeplay Open Sources a Version of DPC++ for Nvidia GPUs|date=2020-02-05|website=HPCwire|language=en-US|access-date=2020-02-12}}{{Cite web|url=https://www.phoronix.com/scan.php?page=news_item&px=Intel-oneAPI-DPC-SYCL-NVIDIA-CU|title=Intel's oneAPI / DPC++ / SYCL Will Run Atop NVIDIA GPUs With Open-Source Layer - Phoronix|website=www.phoronix.com|access-date=2019-12-06}}{{Cite web|url=https://www.codeplay.com/portal/02-03-20-codeplay-contribution-to-dpcpp-brings-sycl-support-for-nvidia-gpus|title=Codeplay - Codeplay contribution to DPC++ brings SYCL support for NVIDIA GPUs|website=www.codeplay.com|access-date=2020-02-11}} to allow oneAPI and SYCL/DPC++ to run atop Nvidia GPUs via CUDA.

University of Heidelberg has developed a SYCL/DPC++ implementation for both AMD and Nvidia GPUs.{{Cite web|last=Salter|first=Jim|date=2020-09-30|title=Intel, Heidelberg University team up to bring Radeon GPU support to AI|url=https://arstechnica.com/gadgets/2020/09/intel-heidelberg-university-team-up-to-bring-radeon-gpu-support-to-ai/|access-date=2021-10-07|website=Ars Technica|language=en-us}}

Huawei released a DPC++ compiler for their Ascend AI Chipset{{Citation|title=Extending DPC++ with Support for Huawei Ascend AI Chipset| date=27 April 2021 |url=https://www.youtube.com/watch?v=7foee4_QkbU|language=en|access-date=2021-10-07}}

Fujitsu has created an open-source ARM version of the oneAPI Deep Neural Network Library (oneDNN){{Cite web|last=fltech|date= 19 November 2020|title=A Deep Dive into a Deep Learning Library for the A64FX Fugaku CPU - The Development Story in the Developer's Own Words|url=https://blog.fltech.dev/entry/2020/11/19/fugaku-onednn-deep-dive-en|access-date=2021-02-10|website=fltech - 富士通研究所の技術ブログ|language=ja}} for their Fugaku CPU.

Unified Acceleration Foundation (UXL) and the future for oneAPI{{anchor|UXL}}

Unified Acceleration Foundation (UXL) is a new technology consortium that are working on the continuation of the OneAPI initiative, with the goal to create a new open standard accelerator software ecosystem, related open standards and specification projects through Working Groups and Special Interest Groups (SIGs). The goal will compete with Nvidia's CUDA. The main companies behind it are Intel, Google, ARM, Qualcomm, Samsung, Imagination, and VMware.{{Cite web |title=Exclusive: Behind the plot to break Nvidia's grip on AI by targeting software |website=Reuters |url=https://www.reuters.com/technology/behind-plot-break-nvidias-grip-ai-by-targeting-software-2024-03-25/ |access-date=2024-04-05}}

References

{{reflist}}

Sources

  • {{cite conference |url= https://icl.utk.edu/files/publications/2022/icl-utk-1616-2022.pdf |title=Extending MAGMA Portability with OneAPI |last1=Fortenberry |first1=Anna |last2=Tomov |first2=Stanimire |date=2022 |publisher=IEEE |book-title= |pages=22–31 |location= |conference=2022 Workshop on Accelerator Programming Using Directives (WACCPD) |id=}} .

External links

  • {{official website}}
  • {{GitHub|oneapi-src|oneAPI}}
  • [https://www.codeplay.com/portal/12-16-19-bringing-nvidia-gpu-support-to-sycl-developers Bringing Nvidia GPU support to SYCL developers]
  • {{cite book |display-authors= 1 |first1= James |last1= Reinders |first2= Ben |last2= Ashbaugh |first3= James |last3= Brodman |first4= Michael |last4= Kinsner |first5= John |last5= Pennycook |first6= Xinmin |last6= Tian |url= https://link.springer.com/book/10.1007/978-1-4842-5574-2 |title= Data Parallel C++: Mastering DPC++ for Programming of Heterogeneous Systems using C++ and SYCL |publisher= Springer |isbn= 978-1-4842-5574-2 |doi= 10.1007/978-1-4842-5574-2 |series= Open Access Book |year= 2021 |s2cid= 226231933 }}
  • [https://developer.codeplay.com/products/oneapi/nvidia/2025.1.0/guides/index oneAPI for NVIDIA GPUs 2025.1.0]
  • [https://developer.codeplay.com/products/oneapi/amd/2025.1.0/guides/index oneAPI for AMD GPUs 2025.1.0]

Category:Application programming interfaces

Category:Cross-platform software

Category:Intel software