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Optimizing Ruby with JIT
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Takashi Kokubun
August 30, 2019
Programming
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14k
Optimizing Ruby with JIT
Builderscon 2019
http://builderscon.io/builderscon/tokyo/2019
Takashi Kokubun
August 30, 2019
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Transcript
Optimizing Ruby with JIT Builderscon 2019 / Takashi Kokubun ࠷ͷݴޠΛࢦͯ͠
None
Ruby 2.6 ͔ΒJITΛ։ൃ
Γ·ͨ͠ [Misc #16094]
None
(࠷దԽࢹͰͷ) Rubyͷಛ
1. ϝιουఆ࠶ఆٛ͠์ 1 + 1 #=> 100
1. ϝιουఆ࠶ఆٛ͠์ 1 + 1 #=> 100
1. ϝιουఆ࠶ఆٛ͠์ 1 + 1 #=> 100
2. ߦ͕ਐΉͱҙͷ͜ͱ͕ى͖Δ a = 1 + 1
2. ߦ͕ਐΉͱҙͷ͜ͱ͕ى͖Δ a = 1 + 1 a #=> 2
2. ߦ͕ਐΉͱҙͷ͜ͱ͕ى͖Δ a = 1 + 1 a #=> 2
a #=> 100 !?
2. ߦ͕ਐΉͱҙͷ͜ͱ͕ى͖Δ
2. ߦ͕ਐΉͱҙͷ͜ͱ͕ى͖Δ ʮ3ߦʹୡͨ͠Β a = 100ʯ
3. ଞʹָ͍͠ػೳ͕͍ͬͺ͍ • eval • ଋറڥͷΦϒδΣΫτԽ (binding, Proc) • ҙΦϒδΣΫτͷྻڍػೳ
(ObjectSpace) • Φʔόʔϑϩʔ͢Δͱܕ͕มΘΔ • ΞυϨεมΘΓ์ͷώʔϓྖҬ (GC.compact)
ຊͷΰʔϧ ͜ͷ࠷దԽ͕ࠔͳݴޠΛ ݶք·ͰߴԽ͢Δ ָ͠͞Λମݧ͍ͯͨͩ͘͠
RubyΠϯλϓϦλͷ͘͠Έ
1. RubyͷίʔυΛಡΈࠐΉ
2. ύʔεͯ͠ߏจʹ͢Δ EFGUXP
3. ίϯύΠϧ໋ͯ͠ྩྻʹ͢Δ EFGUXP UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF
4. VMͰ໋ྩྻΛ࣮ߦ͢Δ EFGUXP UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF
7JSUVBM.BDIJOF ελοΫ
4. VMͰ໋ྩྻΛ࣮ߦ͢Δ EFGUXP UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF
7JSUVBM.BDIJOF ελοΫ
4. VMͰ໋ྩྻΛ࣮ߦ͢Δ EFGUXP UXP QVUPCKFDU TFOE MFBWF 7JSUVBM.BDIJOF
ελοΫ
4. VMͰ໋ྩྻΛ࣮ߦ͢Δ EFGUXP UXP TFOE MFBWF 7JSUVBM.BDIJOF ελοΫ
4. VMͰ໋ྩྻΛ࣮ߦ͢Δ EFGUXP UXP MFBWF 7JSUVBM.BDIJOF ελοΫ
͜ͷϑΣʔζͷڍಈΛ͍ͨ͘͠ EFGUXP UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF 7JSUVBM.BDIJOF
ελοΫ
5. JIT ίϯύΠϥͰߴԽ͢Δ UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF 7JSUVBM.BDIJOF ελοΫ
+*5
5. JIT ίϯύΠϥͰߴԽ͢Δ UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF 7JSUVBM.BDIJOF ελοΫ
+*5 ࠓͷͱ͜Ζ *OUFHFS ࠶ఆٛ͞Εͯͳ͍ͳ
5. JIT ίϯύΠϥͰߴԽ͢Δ UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF 7JSUVBM.BDIJOF ελοΫ
+*5 ͳͷͰ
5. JIT ίϯύΠϥͰߴԽ͢Δ UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF 7JSUVBM.BDIJOF ελοΫ
+*5 ͍ɺ ͕࠶ఆٛ ͞ΕͨΒ͔
5. JIT ίϯύΠϥͰߴԽ͢Δ UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF 7JSUVBM.BDIJOF ελοΫ
+*5
5. JIT ίϯύΠϥͰߴԽ͢Δ UXP QVUPCKFDU QVUPCKFDU TFOE MFBWF 7JSUVBM.BDIJOF ελοΫ
+*5
JITͰͲͷ͘Β͍͘ͳΔͷ͔
JITʹ͓͚Δੑೳ্ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 34.2 Details: https://gist.github.com/k0kubun/0337e1f40b146b2cae7b7c8e6a79973a 1.0x Version
JITʹ͓͚Δੑೳ্ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.0 2.1 2.2 2.3 0.0 0.0 0.0 0.0 39.1 37.9 37.8 34.2 Details: https://gist.github.com/k0kubun/0337e1f40b146b2cae7b7c8e6a79973a 1.1x Version
JITʹ͓͚Δੑೳ্ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.0 2.1 2.2 2.3 2.4 2.5 0.0 0.0 49.0 46.2 39.1 37.9 37.8 34.2 Details: https://gist.github.com/k0kubun/0337e1f40b146b2cae7b7c8e6a79973a 1.4x Version
JITʹ͓͚Δੑೳ্ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.0 2.1 2.2 2.3 2.4 2.5 2.6 0.0 55.9 49.0 46.2 39.1 37.9 37.8 34.2 Details: https://gist.github.com/k0kubun/0337e1f40b146b2cae7b7c8e6a79973a 1.6x Version
JITʹ͓͚Δੑೳ্ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.6 JIT 85.8 55.9 49.0 46.2 39.1 37.9 37.8 34.2 Details: https://gist.github.com/k0kubun/0337e1f40b146b2cae7b7c8e6a79973a 2.5x Version
͜ͷ͕ࠩग़Δཧ༝Λݟ͍͖ͯ·͢ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.6 2.6 JIT 85.8 55.9 0.0 0.0 0.0 0.0 0.0 0.0 Details: https://gist.github.com/k0kubun/0337e1f40b146b2cae7b7c8e6a79973a Version
JITίϯύΠϥͲͷΑ͏ʹ ߴԽΛ͢Δ͔?
JITͷجૅ0 ػցޠʹ͚ͨͩ͠Ͱ ͘ͳΒͳ͍
VM࣮ߦ → ػցޠ ͰͷੑೳมԽ NES emulator: github.com/mame/optcarrot fps 0 23
46 69 92 2.6 native 2.6 JIT 85.8 55.9 ? (-O3 w/ VM໋ྩΠϯϥΠϯԽͳ͠)
VM࣮ߦ → ػցޠ ͰͷੑೳมԽ NES emulator: github.com/mame/optcarrot fps 0 23
46 69 92 2.6 native 2.6 JIT 85.8 56.2 55.9 (-O3 w/ VM໋ྩΠϯϥΠϯԽͳ͠)
ػցޠʹ͚ͨͩ͠Ͱ͘ͳΒͳ͍ • VMͷ࣮͕ͦͦػցޠͰಈ͍͍ͯΔ • VMͰ࣮͞Ε͍ͯΔෳࡶͳॲཧΛ؆ུԽͰ͖ͳ ͚Ε͘ͳΒͳ͍
VMͷதͰԿ͕ى͖͍ͯΔ͔ (Ͳ͕͘͜Ͱ͖ͦ͏Ͱ͠ΐ͏͔?)
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RubyͷJITCίϯύΠϥΛ͏ • ࣮ߦ࣌ʹCίϯύΠϥΛ࣮ߦͯ͠ಈతϥΠϒϥϦ Λੜɺಈతϩʔυ • ϝϦοτ: Ҡ২ੑͷ୲อ͕ͦΕͳΓʹָɺෳ ͷ࠷దԽόοΫΤϯυΛ͑Δ • σϝϦοτ:
JITίϯύΠϧத·͋·͋Ϧιʔε Λ͏ɺϓϩηεγάφϧͷѻ͍͕ࡶʹͳ Δ
RubyͷJITCίϯύΠϥΛ͏ • CίϯύΠϥී௨ͷCͷίʔυͰ࠷దԽͰ͖Δൣ ғ͔͠࠷దԽͰ͖ͳ͍ • Rubyಛ༗ͷಛผͳॲཧΛऔΓআ͘ͷେମࣗ Ͱ࣮͢Δ͔͠ͳ͍
ίϯύΠϥͷ࠷దԽʹΑΔߴԽ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.6 native com piler 2.6 JIT 85.8 62.5 56.2 55.9 (-O3 w/ VM໋ྩΠϯϥΠϯԽ͋Γ)
JITͷجૅ1 ϓϩάϥϜΧϯλͷ࠷దԽ
None
ϓϩάϥϜΧϯλͷ࠷దԽ • VMͷϓϩάϥϜΧϯλͷҙٛͷҰͭVM໋ྩ σΟεύον͕ͩɺ͜Εෆཁʹͳ͍ͬͯΔ • ͰɺϓϩάϥϜΧϯλಈ͔͞ͳ͍͍͔ͯ͘?
ϓϩάϥϜΧϯλͷ࠷దԽ • ଞͷϓϩάϥϜΧϯλͷ༻్: • ྫ֎ͷΩϟονςʔϒϧʹΘΕΔ • ྫ֎͕ͳ͘ͱߦ൪߸ͷܭࢉʹΘΕΔ
None
None
ϓϩάϥϜΧϯλͷ࠷దԽ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.6 native com piler pc 2.6 JIT 85.8 62.7 62.5 56.2 55.9
JITͷجૅ2 ελοΫϙΠϯλͷ࠷దԽ
None
ελοΫϙΠϯλͷ࠷దԽ • VMͷελοΫϙΠϯλͷҙٛVMͷελοΫͷ ૢ࡞ʹ͋Δ • ωΠςΟϒͳελοΫϨδελͰಉ͡ૢ࡞Λ࣮ ݱͯ͠ελοΫϙΠϯλΛΊΒΕͳ͍͔?
ελοΫϙΠϯλͷ࠷దԽ • ϝιουݺͼग़͢͠ΔࡍʹVMͷελοΫʹ ͞ͳ͍ͱݺͼग़ͨ͠ϝιου͔ΒࢀরͰ͖ͳ͍ • େҬग़ޙʹΘΕΔ
None
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ελοΫϙΠϯλͷ࠷దԽ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.6 native com piler pc sp 2.6 JIT 85.8 66.4 62.7 62.5 56.2 55.9
·͔ͩͳΓ͕ࠩ͋Δ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.6 native com piler pc sp 2.6 JIT 85.8 66.4 62.7 62.5 56.2 55.9
Ͳ͏ͨ͠Βߋʹ͘ͳΔͷ͔? • PC/SPͷૢ࡞ผʹϘτϧωοΫͰͳ͍ͷͰ͜ ΕͰ͘ͳΒͳ͍ • Ή͠ΖRubyͷಈతͳಛੑͷαϙʔτͷͨΊʹ͠ ͘ͳ͍ͬͯΔ࠷దԽΛ࣮ݱ͢Δํ͕ॏཁ
JITͷڧΈΛੜ͔ͨ͠࠷దԽ
JITͷԠ༻1 ϝιουΠϯϥΠϯԽ
None
ϝιουΠϯϥΠϯԽ • 1+1Λܭࢉ͢ΔΑΓRubyͷϝιουݺͼग़͠ॲ ཧͷํ͕ෳࡶ • ϝιουݺͼग़͠ͷΦʔόʔϔουΛແʹͰ͖ ͳ͍͔? => ΠϯϥΠϯԽ
ϝιουΠϯϥΠϯԽ • ΠϯϥΠϯԽ͢ΔͱɺίʔϧελοΫͷૢ࡞͕ͳ ͘ͳΔ͚ͩͰͳ͘ɺϝιουݺͼग़͠Λӽ͑ͯ࠷ దԽ͕ޮ͘ • ͔͠͠ΠϯϥΠϯԽͨ͠ޙਖ਼͍͠ڍಈʹదʹ෮ ؼͰ͖Δඞཁ͕͋Δ • “Deoptimization”
ͱ͍͏
Rubyͷϝιουݺͼग़͠ͷ͘͠Έ • άϩʔόϧϝιουΩϟογϡͱΠϯϥΠϯϝ ιουΩϟογϡ͕͋Δ • ΠϯϥΠϯϝιουΩϟογϡશͯͷcall siteʹ ରͯ͠ଘࡏ͢Δ • ͜ΕΛDeoptimizationʹ͏
ϝιουΠϯϥΠϯԽ • ΠϯϥΠϯԽ͢ΔϝιουͰߦ൪߸Λऔಘͨ͠ Γྫ֎͕ඈΜͩΓ͠ͳ͍͜ͱΛอূ͠ͳ͍ͱ͍͚ ͳ͍ • VM໋ྩͷϝλσʔλΛ༻ҙ͓ͯ͘͠
ϝιουΠϯϥΠϯԽ
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ϝιουΠϯϥΠϯԽ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.6 native com piler pc sp inline 2.6 JIT 85.8 72.4 66.4 62.7 62.5 56.2 55.9
JITͷԠ༻2 Πϯελϯεมͷ࠷దԽ
Πϯελϯεมͷ࠷దԽ • ΠϯελϯεมΛಡΉʹԿ͔ϝϞϦͷϩʔ υΛ͠ͳ͍ͱ͍͚ͳ͍ => ͍ • ຊདྷϩʔυ͠ͳ͍ͱ͍͚ͳ͍ΛJITੜίʔυ ͰଈʹͰ͖ͳ͍͔?
RubyͷΠϯελϯεมͷ͘͠Έ • Ϋϥε͝ͱʹɺ͋ΔΠϯελϯεม͕֨ೲ͞Ε ͍ͯΔΠϯσοΫε͕ҟͳΔ • ܧঝͯ͠ಉ໋͡ྩྻ͕ڞ༗͞Ε͍ͯΔͱյΕΔ
Πϯελϯεมͷ࠷దԽ • ϝιουΠϯϥΠϯԽͱಉ༷ͷํ๏Ͱ Deoptimization͢Δ • Ճ͑ͯɺ༨ܭͳϒϥϯνΛΔ͜ͱͰίϯύΠϥ ͷ࠷దԽ͕ޮ͖͘͢͢Δ
Πϯελϯεมͷ࠷దԽ
Πϯελϯεมͷ࠷దԽ NES emulator: github.com/mame/optcarrot fps 0 23 46 69 92
2.6 native com piler pc sp inline ivar 2.6 JIT 85.8 85.8 72.4 66.4 62.7 62.5 56.2 55.9
Ruby·ͩਐԽΛ͍ͯ͠Δ (TruffleRuby 170fps ग़Δ)
·ͱΊ • Ruby࠷ͷݴޠͱͳΓಘΔ͔ʁ • ଞͷݴޠͰॻ͚ΔίʔυɺେͦΕ૬ ʹ࠷దԽͰ͖Δ • Rubyಛ༗ͬΆ͍ݴޠػೳઅͷ͋Δར༻Λ