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Metal for data-parallel computations
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kotetu (kotetuco)
September 02, 2018
Programming
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1.5k
Metal for data-parallel computations
グラフィックス以外の分野でのMetalの可能性
iOSDC 2018 LT 発表資料
kotetu (kotetuco)
September 02, 2018
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Transcript
άϥϑΟοΫεҎ֎ͷ ͰͷMetalͷՄೳੑ iOSDC 2018 (2018/9/2) @kotetu
Kuriyama Toru (܀ࢁప) iOS / Android developer ɹɹɹɹɹɹɹɹat Sansan app
(iOS/Android) Twitter: @kotetuɹɹɹɹɹɹ Github, Qiita: @kotetuco
Metal • GPUΛ͏ͨΊͷFramework • ओʹ3DάϥϑΟοΫεͰ༻ • άϥϑΟοΫεͰ͔͑͠ͳ ͍Θ͚Ͱͳ͍ 3 /
14
Metalͷ༻్ “Render advanced 3D graphics and perform data-parallel computations using
the GPU.” ʮGPUΛͬͨߴͳ3DϨϯμϦϯάͱฒྻॲཧʯ https://developer.apple.com/documentation/metal 4 / 14
Metalͷ༻్ “Render advanced 3D graphics and perform data-parallel computations using
the GPU.” ʮGPUΛͬͨߴͳ3DϨϯμϦϯάͱฒྻॲཧʯ https://developer.apple.com/documentation/metal 4 / 14 3DάϥϑΟοΫεҎ֎ͷ༻్ఆ
GPUͷಛੑ • 1ίΞ͋ͨΓͷੑೳCPUͷํ͕ߴ͍͕ίΞ CPUΑΓଟ͍ • ʮCPUεϙʔπΧʔɺGPUόεʯ • ฒྻॲཧʹ͍ͨΞʔΩςΫνϟ Ҿ༻ɿiOSDC 2017ʮඈͼಓ۩Ͱͳ͍Metalʯ(@shu223͞Μ)
ൃදࢿྉ 5 / 14
ฒྻॲཧͷԸܙΛड͚ͦ͏ͳɹ • ը૾ॲཧ • ػցֶश(ਪ) • ཧγϛϡϨʔγϣϯ 6 /
14
ฒྻॲཧͷԸܙΛड͚ͦ͏ͳɹ • ը૾ॲཧ • ػցֶश(ਪ) • ཧγϛϡϨʔγϣϯ 6 /
14
ը૾ॲཧ • Core Image (Core Imageͷը૾ॲཧͷҰ෦ ෦ͰMetalΛ༻͍ͯ͠Δ) • Core Image͕αϙʔτ͍ͯ͠ͳ͍ը૾ॲཧ
OpenCVͳͲͷը૾ॲཧϥΠϒϥϦΛ͏ 7 / 14
OpenCV • ը૾ॲཧɾίϯϐϡʔλϏδϣϯϥΠϒϥϦ • PCͷGPUʹରԠ͍ͯ͠Δ͕MetalʹରԠ ͍ͯ͠ͳ͍ • iOS্ͰGPUͷԸܙΛड͚ΒΕͳ͍ 8 /
14
࣮ݧɿը૾ॲཧͷॲཧ࣌ؒɹɹ Λൺֱɹɹ • OpenCV (CPU) • Metal (GPU) • Metal
Performance Shader ɹɹɹɹɹ (MetalΛͬͨը૾ɾฒྻॲཧϥΠϒϥϦ) 9 / 14
༻ͨ͠ը૾ https://pixabay.com/photo-3599450/ ը૾αΠζɿ5984 × 3989 ϑΝΠϧαΠζɿ6.9MB (JPEG) 10 / 14
ൺֱʹ༻͍ͨը૾ॲཧ 11 / 14 1. ೋԽ (നࠇը૾ม) 2. ը૾ͷॖখ 3.
ॖখ + ΅͔͠
ݕূ༻ΞϓϦ • githubʹ͋Γ·͢(Լهࢀর) • Xcode 10 (beta 6) • iOS11+
(࣮ػ͕ඞཁ) • OpenCV 3.4.2 12 / 14 https://github.com/kotetuco/ComparisonOfMetalAndOpenCV
ݕূ݁Ռ 13 / 14 ※ ୯ҐϛϦඵɺ༻ iPhone 8 Plusɹ(iOS11.3.1)
ݕূ݁Ռ 13 / 14 ※ ୯ҐϛϦඵɺ༻ iPhone 8 Plusɹ(iOS11.3.1) Metal͕
͍
·ͱΊ • MetalΛ͑ඞͣ͘ͳΔΘ͚Ͱͳ͍ • ୯७ͳฒྻॲཧͰGPU༻ϝϞϦͷίϐʔ CPU-GPUؒ௨৴ͷ࣌ؒΛແࢹͰ͖ͳ͍ • ෳͷॲཧΛ·ͱΊͯߦ͍͍ͨ߹ʹMetal͕༗ར • Metal(GPU)ʹ͍͍ͯΔ͔Ͳ͏͔ͷݟۃΊ͕େࣄ
14 / 14