Vulkan (API)
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Vulkan API

Vulkan is a low-overhead, cross-platform 3D graphics and computing API. Vulkan targets high-performance realtime 3D graphics applications such as video games and interactive media across all platforms. Compared to OpenGL, Direct3D and Metal, Vulkan is intended to offer higher performance and more balanced CPU/GPU usage. Other major differences from Direct3D 11 and OpenGL are Vulkan being a considerably lower-level API and offering parallel tasking. In addition to its lower CPU usage, Vulkan is designed to allow developers to better distribute work among multiple CPU cores.[12]

Vulkan was first announced by the non-profit Khronos Group at GDC 2015.[10][13][14] The Vulkan API was initially referred to as the "next generation OpenGL initiative", or "OpenGL next"[15] by Khronos, but use of those names was discontinued when Vulkan was announced.[16] Vulkan is derived from and built upon components of AMD's Mantle API, which was donated by AMD to Khronos with the intent of giving Khronos a foundation on which to begin developing a low-level API that they could standardize across the industry.[10]

Features

OpenGL and Vulkan are both rendering APIs. In both cases, the GPU executes shaders, while the CPU executes everything else.

Vulkan is intended to provide a variety of advantages over other APIs as well as its predecessor, OpenGL. Vulkan offers lower overhead, more direct control over the GPU, and lower CPU usage.[14] The overall concept and feature set of Vulkan is similar to Mantle later adopted by Microsoft with Direct3D 12 and Apple with Metal.

Intended advantages of Vulkan over previous-generation APIs include:

  • A single API for both desktop and mobile graphics devices, whereas previously these were split between OpenGL and OpenGL ES respectively.
  • Availability on multiple modern operating systems in contrast to Direct3D 12; like OpenGL, the Vulkan API is not locked to a single OS or device form factor. As of release, Vulkan runs on Android, Linux, Tizen, Windows 7, Windows 8, and Windows 10 (MoltenVK provides freely-licensed[17][18][19] third-party support for iOS and macOS based on Metal[20])
  • Reduced driver overhead, reducing CPU workloads.[21]
  • Reduced load on CPUs through the use of batching,[definition needed] leaving the CPU free to do more computation or rendering than otherwise.[22]
  • Better scaling on multi-core CPUs. Direct3D 11 and OpenGL 4 were initially designed for use with single-core CPUs and only received augmentation to be executed on multi-cores. Even when application developers use the augmentations, the API regularly does not scale well on multi-cores.[23]
  • OpenGL uses the high-level language GLSL for writing shaders which forces each OpenGL driver to implement its own compiler for GLSL that executes at application runtime to translate the program's shaders into the GPU's machine code. Instead, Vulkan drivers are supposed to ingest shaders already translated into an intermediate binary format called SPIR-V (Standard Portable Intermediate Representation), analogous to the binary format that HLSL shaders are compiled into in Direct3D. By allowing shader pre-compilation, application initialization speed is improved and a larger variety of shaders can be used per scene. A Vulkan driver only needs to do GPU specific optimization and code generation, resulting in easier driver maintenance, and eventually smaller driver packages (currently GPU vendors still have to include OpenGL/CL).[24]
  • Unified management of compute kernels and graphical shaders, eliminating the need to use a separate compute API in conjunction with a graphics API.
OpenGL Vulkan[25]
One single global state machine Object-based with no global state
State is tied to a single context All state concepts are localized to a command buffer
Operations can only be executed sequentially Multi-threaded programming is possible
GPU memory and synchronization are usually hidden Explicit control over memory management and synchronization
Extensive error checking Vulkan drivers do no error checking at runtime;
there is a validation layer for developers

NVIDIA notes that OpenGL is still a great option for a lot of use cases, as it comes at a much lower complexity and maintenance burden than Vulkan, while in many cases still providing great overall performance.[26]

AMD says that Vulkan supports close-to-metal control, enabling faster performance and better image quality across Windows 7, Windows 8.1, Windows 10, and Linux. No other graphics API offers the same powerful combination of OS compatibility, rendering features, and hardware efficiency.[27]

Vulkan 1.1

At SIGGRAPH 2016, Khronos announced that Vulkan would be getting support for automatic multi-GPU features, similar to what is offered by Direct3D 12.[28] Multi-GPU support included in-API removes the need for SLI or Crossfire which requires graphics cards to be of the same model. API multi-GPU instead allows the API to intelligently split the workload among two or more completely different GPUs.[29] For example, integrated GPUs included on the CPU can be used in conjunction with a high-end dedicated GPU for a slight performance boost.

On March 7, 2018, Vulkan 1.1 was released by the Khronos Group.[30] This first major update to the API standardized several extensions, such as multi-view, device groups, cross-process and cross-API sharing, advanced compute functionality, HLSL support, and YCbCr support.[31] At the same time, it also brought better compatibility with DirectX 12, explicit multi-GPU support, ray tracing support,[32][33] and laid the groundwork for the next generation of GPUs.[34] Alongside Vulkan 1.1, SPIR-V was updated to version 1.3.[31]

Vulkan 1.2

On January 15, 2020, Vulkan 1.2 was released by the Khronos Group.[35] This second major update to the API integrates 23 additional commonly-used proven Vulkan extensions into the base Vulkan standard. Some of the most important features are "timeline semaphores for easily managed synchronization", "a formal memory model to precisely define the semantics of synchronization and memory operations in different threads", and "descriptor indexing to enable reuse of descriptor layouts by multiple shaders". The additional features of Vulkan 1.2 improve its flexibility when it comes to implementing other graphics APIs on top of Vulkan, including "uniform buffer standard layout", "scalar block layout", and "separate stencil usage".[36]

Planned features

When releasing OpenCL 2.2, the Khronos Group announced that OpenCL would converge where possible with Vulkan to enable OpenCL software deployment flexibility over both APIs.[37][38] This has been now demonstrated by Adobe's Premiere Rush using the clspv[39] open source compiler to compile significant amounts of OpenCL C kernel code to run on a Vulkan runtime for deployment on Android.[40]

History

The Khronos Group began a project to create a next generation graphics API in July 2014 with a kickoff meeting at Valve.[41] At SIGGRAPH 2014, the project was publicly announced with a call for participants.[10]

According to the US Patent and Trademark Office, the trademark for Vulkan was filed on February 19, 2015.[42]

Vulkan was formally named and announced at Game Developers Conference 2015, although speculation and rumors centered around a new API existed beforehand and referred to it as "glNext".[43]

2015

In early 2015, LunarG (funded by Valve) developed and showcased a Linux driver for Intel which enabled Vulkan compatibility on the HD 4000 series integrated graphics, despite the open-source Mesa drivers not being fully compatible with OpenGL 4.0 until later that year.[44][45] There is still the possibility[46] of Sandy Bridge support, since it supports compute through Direct3D11.

On August 10, 2015, Google announced that future versions of Android would support Vulkan.[47]Android 7.x "Nougat" launched support for Vulkan on August 22, 2016. Android 8.0 "Oreo" has full support.

On December 18, 2015, the Khronos Group announced that the 1.0 version of the Vulkan specification was nearly complete and would be released when conforming drivers were available.[14]

2016

The specification and the open-source Vulkan SDK were released on February 16, 2016.[1]

2018

On February 26, 2018, Khronos Group announced that the Vulkan API became available to all on macOS and iOS through the MoltenVK library, which enables Vulkan to run on top of Metal.[48] Other new developments were shown at SIGGRAPH 2018.[49] Previously MoltenVK was a proprietary and commercially licensed solution, but Valve made an arrangement with developer Brenwill Workshop Ltd to open-source MoltenVK under the Apache 2.0 license and as a result the library is now available on GitHub. Valve also announced that Dota 2 can as of 26 February 2018 run on macOS using the Vulkan API, which is based on MoltenVK.[50]

2019

On Feb 25, 2019, the Vulkan Safety Critical (SC) Working Group was announced to bring Vulkan GPU acceleration to safety critical industries.[51]

Google's Stadia streaming cloud gaming service uses Vulkan on Linux based servers with AMD GPUs.[52]

2020

On January 15, 2020, Vulkan 1.2 was released.

Alongside the Vulkan 1.2 release, the Khronos Group posted a blog post which considered that HLSL support in Vulkan had reached "production ready" status, given the improvements in Microsoft's DXC compiler and Khronos's glslang compiler, and new features in Vulkan 1.2 which enhance HLSL support.[53]

On February 3, 2020, the Raspberry Pi Foundation announced that it was working on an open source Vulkan driver for their Raspberry Pi, a popular single board computer.[54] On June 20, 2020, a graphics engineer revealed that he had created one after two years of work that was capable of running VkQuake3 at over 100FPS on the small computer.[55]

On March 17, 2020, Khronos Group released the Ray Tracing extensions by adopting previously existing Nvidia implementation with some minor changes.[56][57]

Hardware

Initial specifications stated that Vulkan will work on hardware that currently supports OpenGL ES 3.1 or OpenGL 4.x and up.[58] As Vulkan support requires new graphics drivers, this does not necessarily imply that every existing device that supports OpenGL ES 3.1 or OpenGL 4.x will have Vulkan drivers available.

Vulkan 1.1 with higher efforts is supported by the newer lines in Hardware like Intel Skylake and higher, AMD GCN 3rd and higher, Nvidia Kepler and higher. AMD, Arm, Imagination Technologies, Intel, Nvidia and Qualcomm supports actual hardware since second half of 2018 Vulkan 1.1 with own drivers. Mesa 18.1 supports with RADV and ANVIL driver AMD and Intel hardware. Actual state in Mesa 3D of RADV and ANVIL see Mesamatrix.[59]

Android 7.0 Nougat supports Vulkan 1.0.[60] The software was released in August 2016.[61] Vulkan 1.1 is supported in Android 9.0 Pie.[62] Vulkan 1.1 support is mandatory for 64-bit devices running Android 10.[63]

Vulkan support for iOS and macOS has not been announced by Apple, but an open-source library exists which provides a Vulkan implementation that runs on top of Metal on iOS and macOS devices.[20]

Hardware support
Company Hardware Software support: Vulkan 1.0
Microarchitecture Available since GPUs (chips) Graphic cards / SoCs Android[a] Linux Microsoft Windows[b]
AMD
RDNA 1.0 July 2019 Navi 10, Navi 12, Navi 14 Radeon RX 5000 series N/A 1.0 and 1.1: AMDGPU PRO (Ubuntu & RHEL)[65][66]
& RADV in Mesa[67]
1.0 (1.1 and 1.2 GCN 2nd and higher) Radeon Software[68]
GCN 5th August 2017 Vega 10, Raven Ridge, Picasso Radeon RX Vega series,
GCN 4th June 2016 Polaris 10, Polaris 11, Polaris 12 Radeon RX 400 series, Radeon RX 500 series
GCN 3rd August 2014 Tonga, Fiji, Carrizo Radeon R9 Series and more
GCN 2nd March 2013 Bonaire, Hawaii, Kaveri, Kabini, Temash, Mullins, Beema, Carrizo-L Radeon HD 7790 and more, PlayStation 4, Xbox One Stable}} 1.1-1.2 </ref>
GCN 1st January 2012 Oland, Cape Verde, Pitcairn, Tahiti Radeon HD 77xx-7900 Series
TeraScale 3 December 2010 Cayman, Trinity/Richland Radeon HD 69xx Series, Radeon HD 7xxx-76xx Series not supported
TeraScale 2 September 2009 Cedar, Cypress, Juniper, Redwood, Palm, Sumo Radeon HD 5000 Series, Radeon HD 6350, Radeon HD 64xx-68xx Series
TeraScale 1 May 2007 R600, RV630, RV610, RV790, RV770, ... Radeon HD 2000 Series, HD 3000, HD 4000
Nvidia
Ampere September 2020 GA10x GeForce 30 series 1.2: Nvidia GeForce driver 1.2: Nvidia GeForce driver
Turing September 2018 TU10x, TU11x GeForce 20 series, GeForce 16 series 1.1 and 1.2: Nvidia GeForce driver 1.1 and 1.2: Nvidia GeForce driver
Volta December 2017 GV10x Nvidia Titan V 1.0, 1.1 and 1.2: Nvidia GeForce driver 1.0, 1.1 and 1.2: Nvidia GeForce driver
Pascal May 2016 GP10x GeForce 10 series, Tegra X2 Yes 1.0, 1.1 and 1.2: Nvidia GeForce driver[69][70] 1.0, 1.1 and 1.2: Nvidia GeForce driver[70]
Maxwell February 2014 GM10x, GM20x GeForce GTX 750 Ti, GTX 750, GTX 860M, GeForce 900 series, Tegra X1
Kepler March 2012 GK10x, GK110, GK208 GeForce 600 series, GeForce 700 series, Tegra K1
Fermi March 2010 GF10x, GF11x GeForce 400 series, GeForce 500 series not supported
Tesla November 2006 G8x, G9x, GT20x, GT21x GeForce 8 series, GeForce 9 series, GeForce 100 series, GeForce 200 series, GeForce 300 series
Intel Tiger Lake September 2020 Core i3-/i5-/i7-11xxGx, Yes Yes Yes
1.2: Intel Graphics driver[71]
Ice Lake August 2019 Core i3-/i5-/i7-10xxGx, Yes Yes Yes
Comet Lake August 2019 Core i3-/i5-/i7-10000, Yes Yes Yes
Coffee Lake October 2017 Core i3-/i5-/i7-8000, Yes 1.0 and 1.1: Anvil in Mesa 18.1 Yes
Kaby Lake September 2016 Core i3-/i5-/i7-7000, Pentium xyz, Celeron xyz 1.0 Anvil in Mesa 17.1, 1.1 in Mesa 18.1[72] 1.0: Anvil in Mesa[73][74], 1.1 in Mesa 18.1 Intel Graphics driver[75]
Skylake August 2015 Core i3-/i5-/i7-6000, Core m3-/m5-/m7-6Yxx, Pentium G4xxx, Celeron G39xx
Broadwell September 2014 Core i3-/i5-/i7-5000, Core M-5Yxx 1.0 Anvil in Mesa 17.1[72] 1.0: Anvil in Mesa[73][74] not supported
Haswell June 2013 Core i3-/i5-/i7-4000, Pentium G3xxx, Celeron G18xx
Ivy Bridge April 2012 Core i3-/i5-/i7-3000, Pentium G2xxx, Celeron G16xx
Sandy Bridge January 2011 Core i3-/i5-/i7-2000, Pentium Gxxx, Celeron Gxxx not supported not supported
Westmere January 2010 Core i3-/i5-/i7-xxx, Pentium G69xx, Celeron G1101
Imagination Technologies
PowerVR Series 8 February 2016 GE8200, GE8300 PowerVR Graphics SDK v4.1[76]
PowerVR Series 7 November 2014 GE7400, GE7800, GT7200, GT7400, GT7600, GT7800, GT7900 Apple A9, A9X, A10 Fusion, Helio X30 (MT6799)
PowerVR Series 6 January 2012 G6100, G6200, G6230, G6400, G6430, G6630, RK3368, G6050, G6060, G6100 (XE), G6110, GX6240, GX6250, GX6450, GX6650 Apple A7, A8, A8X, MediaTek MT8173, MT8176, MediaTek MT6595M, MT6595T, MT6595M, MT6795, MT8135, Helio X10 (MT6795), LG H13, Atom Z3460, Z3480, Z3530, Z3560, Z3570, Z3580
PowerVR Series 5 January 2009 SGX543, SGX544, SGX554 Apple S1, A5, A5X, A6, A6X, NovaThor L8540, L8580, L9540, TI OMAP 4470, 5430, 5432, MediaTek MT5327, MT6589M, MT6589T, MT6589, MT8117, MT8121, MT8125, MT8389, Atom Z2460, Z2520, Z2560, Z2580, Z2760, Exynos 5410 not supported
Qualcomm
Adreno 600 series Adreno 616, 620, 630, 640, 650 Snapdragon 710, 712, 720, 730, 765, 845, 855, 865 1.1
Adreno 500 series Adreno 510, 512, 530, 540 Snapdragon 430, 625, 650, 652, 660,820, 821, 835 1.0[77]
Adreno 400 series Adreno 418, 420, 430 Snapdragon 415, 615, 616, 617, 805, 808, 810 1.0(Adreno 418,430)[78]
Adreno 300 series Snapdragon 200, 208, 210, 212, 400, 410, 412, 600, 800, 801 not supported
ARM
Bifrost[79] June 2016 Mali-G71, ... Kirin 960, 970, Exynos 8895, MediaTek Helio P23 (MT6763T), Helio P30 1.0[80]
Midgard 4th Q4 2015 Mali-T860, Mali-T830, Mali-T880 Exynos 8890, Exynos 7880, Exynos 7870, Kirin 950, 955, MediaTek MT6738, MT6750, Helio X20 (MT6797), X25 (MT6797T), P10 (MT6755), P20 (MT6757)
Midgard 3rd October 2013 Mali-T760, ... Exynos 7420, Exynos 5433, MT6752, MT6732, RK3288
Midgard 2nd August 2012 Mali-T600 series, T720 Exynos 5250, 5260, 5410, 5420, 5422, 5430, 5800, 7580, Mediatek MT6735, MT6753, Kirin 920, 925, 930, 935 not supported

See also

  • Direct3D 12 - main competitor of Vulkan
  • OpenGL - another graphics API by the Khronos Group
  • OpenCL - a heterogeneous computing framework by the Khronos Group
  • Mantle - a low-level graphics and compute API from AMD, the foundation of Vulkan
  • Metal - a low-level graphics and compute API for iOS and macOS
  • AMDGPU - AMD's fully open-source unified graphics driver for Linux

Notes

  1. ^ For Android Nougat and later.[64]
  2. ^ Drivers so far have supported Windows 7 and later.

References

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Further reading

  • Vulkan Programming Guide: The Official Guide to Learning Vulkan (OpenGL), Nov 10, 2016, by Graham Sellers and John Kessenich ISBN 978-0-1344-64541
  • Introduction to Computer Graphics and the Vulkan API, Jul 1, 2017, by Kenwright ISBN 978-1-5486-16175
  • Vulkan Cookbook, Apr 28, 2017, by Pawel Lapinski ISBN 978-1-7864-68154

External links


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

Vulkan_(API)
 



 



 
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