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Introduction to GPU Programming in Python
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Yuki Ishikawa
April 21, 2018
Technology
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140
Introduction to GPU Programming in Python
PyData.Okinawa Meetup #34
https://pydataokinawa.connpass.com/event/82009/
Yuki Ishikawa
April 21, 2018
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Transcript
Introduction to GPU Programming in Python 2018.04.21 PyData.Okinawa #34 @hoto17296
None
None
@hoto17296 • ͪΎΒσʔλגࣜձࣾ • σʔλੳϚϯ • JavaScript / Python /
AWS • IPv6 ͕Θ͔Βͳ͍ࠓ͜ͷ͝Ζ
Ͳͷ͝Ոఉʹ͋Δ GPU Ϛγϯ
͍͜ͳͯ͠·͔͢ʁʁʁ
ࣗͷ GPU ͷΠϝʔδ Λ͘ಈ͔ͤΔͭʂ
͍ͬͨͳ͍
GPU Λ͍ͨ͢Ίʹ CUDA Λ৮ͬͯΈΑ͏
GPU ͱ • Graphics Processing Unit • άϥϑΟοΫॲཧͷͨΊͷϓϩηοα • ୯७ͳॲཧΛฒྻԋࢉͰ͖Δ
• άϥϑΟοΫҎ֎ʹ׆༻͞ΕΔ (GPGPU) • σΟʔϓϥʔχϯάͱ͔
(NVIDIA) GPU ͷத ετϦʔϛϯά Ϛϧνϓϩηοα ଞʹϝϞϦͱ͔ Ωϟογϡͱ͔ ৭ʑ͋Δ͚Ͳলུ CUDA ίΞ
CUDA ͱ • Compute Unified Device Architecture • NVIDIA GPU
ΛͬͯฒྻܭࢉΛ͢ΔͨΊͷ ϓϩάϥϛϯάϞσϧ
CUDA ༻ޠ • ϗετͱσόΠε • CPU ଆΛϗετ, GPU ଆΛσόΠε ͱݺͿ
• Χʔωϧؔ • GPU ଆͰ࣮ߦ͢ΔॲཧΛهड़ͨؔ͠
CUDA ϓϩάϥϛϯάϞσϧ • ฒྻ͕େʹͳΔ • εϨου, ϒϩοΫ, άϦου ͱ͍͏ ·ͱ·ΓͰฒྻॲཧΛߦ͏
ग़యɿ http://www.nvidia.co.jp/object/cuda_education_jp_old.html
CUDA ϓϩάϥϛϯάϞσϧ • ฒྻ = εϨου x ϒϩοΫ x άϦου
• 1ϒϩοΫ͋ͨΓ࠷େ 512 εϨου • 1άϦου͋ͨΓ࠷େ 65536^2 ϒϩοΫ 1GPU ͋ͨΓ࠷େ 2 ஹ ฒྻʂʂʂ ✌('ω'✌ )ࡾ✌('ω')✌ࡾ( ✌’ω')✌
CUDA ϓϩάϥϛϯά Γͨ͘ͳ͖ͬͯ·ͨ͠Ͷ ʁʁʁ
CUDA ϓϩάϥϛϯάͷํ๏ • C Έ͍ͨͳݴޠͰΧʔωϧؔΛ࣮ͯ͠ nvcc ͱ͍͏ίϯύΠϥͰίϯύΠϧ͢Δ • μϧ͍ •
GPU Λར༻ͨ͠ฒྻॲཧΛॻ͍ͯΈ͍͕ͨ C ͕ॻ͖͍ͨΘ͚Ͱͳ͍ • Python Ͱॻ͔ͤͯ͘Ε
Numba • JIT ίϯύΠϧͯ͠ Python ΛߴԽͰ͖Δͭ • GPU ར༻Ͱ͖Δ (Numba
CUDA)
Χʔωϧؔͷ ఆٛ σίϨʔλΛࢦఆ͢Δ͜ͱͰ Χʔωϧؔͱͯ͠ఆٛ ͜ͷΧʔωϧ͕ؔ ฒྻ࣮ߦ͞ΕΔ ݱࡏͲͷҐஔ (ʁ) ͷεϨουͰ ࣮ߦ͍ͯ͠Δ͔औಘͰ͖Δ
εϨουͷҐஔใ͔Β ॲཧ͢Δରཁૉͷ࠲ඪΛܭࢉ͢Δ ߦྻͷରཁૉʹରͯ͠ॲཧΛߦ͏
Χʔωϧؔͷ࣮ߦ ฒྻ (griddim, blockdim) Λࢦఆ͔ͯ͠Β࣮ߦ͢Δ
͏গ͠ෳࡶͳྫɿ ΈࠐΈԋࢉ ग़యɿ http://tecmemo.wpblog.jp/category/machine-learning/deep-learning/page/2/
ϥϓϥγΞϯϑΟϧλ • ΈࠐΈԋࢉͰը૾ͷΤοδݕग़Λߦ͏ख๏ • ը૾ͷ৭ͷඍʹ૬͢Δ • ͜ͷߦྻΛϑΟϧλͱͯ͠ ΈࠐΈԋࢉΛߦ͏ 1 1
1 1 -8 1 1 1 1
ΈࠐΈԋࢉΛߦ͏ ΧʔωϧؔΛ ࣮
None
ೖྗը૾ ϑΟϧλ݁Ռ
·ͱΊ • Python Ͱ GPU ϓϩάϥϛϯάͰ͖Δ • GPU Ͱ༡Ϳͷͨͷ͍͠ ✌('ω'✌
)ࡾ✌('ω')✌ࡾ( ✌’ω')✌