ANAHEIM, Calif.--(BUSINESS WIRE)--SIGGRAPH - The Khronos™ Group today announced the ratification and public release of the OpenCL™ 2.0 provisional specification. OpenCL 2.0 is a significant evolution of the open, royalty-free standard that is designed to further simplify cross-platform, parallel programming while enabling a significantly richer range of algorithms and programming patterns to be easily accelerated. As the foundation for these increased capabilities, OpenCL 2.0 defines an enhanced execution model and a subset of the C11 and C++11 memory model, synchronization and atomic operations. The release of the specification in provisional form is to enable developers and implementers to provide feedback before specification finalization, which is expected within 6 months. The OpenCL 2.0 provisional specification and reference cards are available at www.khronos.org/opencl/.
“The OpenCL working group has combined developer feedback with emerging hardware capabilities to create a state-of–the-art parallel programming platform - OpenCL 2.0,” said Neil Trevett, chair of the OpenCL working group, president of the Khronos Group and vice president of mobile content at NVIDIA. “OpenCL continues to gather momentum on both desktop and mobile devices. In addition to enabling application developers it is providing foundational, portable acceleration for middleware libraries, engines and higher-level programming languages that need to take advantage of heterogeneous compute resources including CPUs, GPUs, DSPs and FPGAs.”
Updates and additions to OpenCL 2.0 include:
Shared Virtual Memory
Host and device kernels can directly
share complex, pointer-containing data structures such as trees and
linked lists, providing significant programming flexibility and
eliminating costly data transfers between host and devices.
Dynamic Parallelism
Device kernels can enqueue kernels to
the same device with no host interaction, enabling flexible work
scheduling paradigms and avoiding the need to transfer execution control
and data between the device and host, often significantly offloading
host processor bottlenecks.
Generic Address Space
Functions can be written without
specifying a named address space for arguments, especially useful for
those arguments that are declared to be a pointer to a type, eliminating
the need for multiple functions to be written for each named address
space used in an application.
Images
Improved image support including sRGB images and 3D
image writes, the ability for kernels to read from and write to the same
image, and the creation of OpenCL images from a mip-mapped or a
multi-sampled OpenGL texture for improved OpenGL interop.
C11 Atomics
A subset of C11 atomics and synchronization
operations to enable assignments in one work-item to be visible to other
work-items in a work-group, across work-groups executing on a device or
for sharing data between the OpenCL device and host.
Pipes
Pipes are memory objects that store data organized as
a FIFO and OpenCL 2.0 provides built-in functions for kernels to read
from or write to a pipe, providing straightforward programming of pipe
data structures that can be highly optimized by OpenCL implementers.
Android Installable Client Driver Extension
Enables OpenCL
implementations to be discovered and loaded as a shared object on
Android systems.
OpenCL SPIR 1.2 Provisional Specification
In addition, the
OpenCL Working Group also today released the OpenCL SPIR 1.2 provisional
specification for public review. ‘SPIR’ stands for Standard Portable
Intermediate Representation and is a portable non-source representation
for OpenCL 1.2 device programs. It enables application developers to
avoid shipping kernel source and to manage the proliferation of devices
and drivers from multiple vendors. OpenCL SPIR will enable consumption
of code from third party compiler front-ends for alternative languages,
such as C++, and is based on LLVM 3.2. Khronos has contributed open
source patches for Clang 3.2 to enable SPIR code generation.
Industry Support
“These 2 new OpenCL specifications will
allow software developers to accelerate a much wider variety of
applications on a greater range of devices than previously possible.
OpenCL 2.0 will allow applications to process more complex data and
algorithms in parallel than was possible in previous standards, while
OpenCL SPIR will allow a variety of different programming languages to
be compiled directly into OpenCL code for heterogeneous systems,” said
Andrew Richards, CEO of Codeplay. “These are 2 big steps forwards to
enable software developers to embrace heterogeneous platforms and
Codeplay is actively involved in developing for both already.”
“Intel has been deeply involved in shaping new OpenCL 2.0 features like Shared Virtual Memory and OpenCL SPIR,” said Jonathan Khazam, vice president and general manager of Intel's Visual & Parallel Computing Group. ”We are very excited about the improved programmability of OpenCL 2.0 and the potential to create new experiences with Intel® Iris™ Graphics Products.”
Tony King-Smith, EVP marketing for Imagination Technologies, said: “As a long-standing Promoter, Imagination is delighted to see Khronos release this major upgrade to the OpenCL API standard. We see an ever widening portfolio of markets relevant to OpenCL, from mobile and consumer multimedia-rich devices through automotive infotainment up to advanced cloud servers and supercomputers. OpenCL is gaining traction among our customers as a means to deliver high-performance compute on our widely deployed PowerVR GPUs as well as our MIPS CPUs. Indeed we have been among the first to enable OpenCL in GPUs for mobile and embedded SoC devices already in production, including some of the leading smartphones and tablets shipping today. We have also been one of the first to demonstrate the significant power saving advantages of OpenCL on GPU running alongside OpenGL ES in real applications – a benefit often overlooked by application developers today. We look forward to continued industry momentum behind OpenCL as a key enabling API for GPU compute and heterogeneous processing.”
“The ability to perform compute-intensive tasks in parallel, using virtually any processor present in the device opens the door for significant performance and functionality improvements in several industries from Automotive to SmartTVs, game consoles and the smartphones. Vivante's GPU family have been utilizing OpenCL API for long time and we continue to be in forefront to support this new major API version as it will further improve the flow of getting even more complex things done, much faster and better,” said Weijin Dai, CEO of Vivante Corp. “We’re pleased to equip our customers with our GPUs that are faster, smaller and cooler when we see OpenCL to become a significant standard in our customers' multi-core implementations."
OpenCL BOF at SIGGRAPH, Anaheim, CA July 24th
2013
There is an OpenCL BOF “Birds of a Feather” Meeting on
Wednesday July 24th at 4-5PM at the Hilton Anaheim, California Ballroom
A & B, where attendees are invited to meet OpenCL implementers and
developers and learn more about the new OpenCL 2.0 specification.
About The Khronos Group
The Khronos Group is an industry
consortium creating open standards to enable the authoring and
acceleration of parallel computing, graphics, vision, sensor processing
and dynamic media on a wide variety of platforms and devices. Khronos
standards include OpenGL®, OpenGL® ES, WebGL™,
OpenCL™, WebCL™, OpenVX™, OpenMAX™, OpenVG™, OpenSL ES™, StreamInput™
and COLLADA™. All Khronos members are able to contribute to the
development of Khronos specifications, are empowered to vote at various
stages before public deployment, and are able to accelerate the delivery
of their cutting-edge media platforms and applications through early
access to specification drafts and conformance tests. More information
is available at www.khronos.org.
Khronos, DevU, StreamInput, WebGL, WebCL, COLLADA, OpenKODE, OpenVG, OpenVX, OpenSL ES and OpenMAX are trademarks of the Khronos Group Inc. ASTC is a trademark of ARM Holdings PLC, OpenCL is a trademark of Apple Inc. and OpenGL is a registered trademark and the OpenGL ES and OpenGL SC logos are trademarks of Silicon Graphics International used under license by Khronos. All other product names, trademarks, and/or company names are used solely for identification and belong to their respective owners.
