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ちょっといい感じの Ruby プロファイラがほしい (RubyKaigi 2023 follo...
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osyoyu
August 19, 2023
Technology
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ちょっといい感じの Ruby プロファイラがほしい (RubyKaigi 2023 follow up)
osyoyu
August 19, 2023
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Transcript
Daisuke Aritomo (@osyoyu) / RubyKaigi 2023 follow-up ͪΐͬͱ͍͍ײ͡ͷ Ruby ϓϩϑΝΠϥ͕΄͍͠
pp @osyoyu • /^͓͠ΐ[͏ʔ]Ώ/ • ࠷ۙͷඪ: ւۭͷ੍ • ۙگ: ٿͷ70%ΛΞϯϩοΫ͠·ͨ͠
• ۭΛͲ͏߈ུ͢Δ͔ߟ͍͑ͯ·͢ • ඈߦػ͔ɺϋϯάάϥΠμʔతͳͷ͔
Daisuke Aritomo (@osyoyu) / RubyKaigi 2023 follow-up ͪΐͬͱ͍͍ײ͡ͷ Ruby ϓϩϑΝΠϥ͕΄͍͠
l؍͕ͦ͜ɺͯ͢ͷൃݟͷ伴Ͱ͋Δɻz
$IBU(15͕Τδιϯͷͷͱͯ͠հͨ͠ɺ͓ͦΒ࣮͘ࡏ͠ͳ͍֨ݴ l؍͕ͦ͜ɺͯ͢ͷൃݟͷ伴Ͱ͋Δɻz
͓͞Β͍: Ϟνϕʔγϣϯ • ISUCON Ͱ༏উ͢ΔͨΊʹɺRuby ϓϩάϥϜͷϘτϧωοΫΛ ޮతʹ୳͔ͨͬͨ͠ • ॳݟͷʢͱ͍ͯʣWeb ΞϓϦέʔγϣϯΛ͞Εͯ
• ੍ݶ࣌ؒ8࣌ؒͰύϑΥʔϚϯενϡʔχϯά͍ͯͩ͘͠͞ • ͱ͍͏ڝٕ͕͋ͬͯɺRuby Ͱউ͍ͪͨ • ͦͷͨΊʹ Ruby ͷྑ͍ϓϩϑΝΠϥ͕΄͍͠
ͳΜ͔͔ͬͨؾʹͳΔ • Stackprof Ͱ࡞ͬͨ Flamegraph ΛݟΔ • ԣ͕͍ϝιουͷ࣮ΛݟͯΈΔ • ผʹͦΜͳʹͦ͏͡Όͳ͍……
• ͳΔ΄Ͳɺ1ճ͍͚Ͳɺͨ͘͞ΜݺΕͯΔ͚ͩͳͷ͔ʁ • Ͳ͏͢Ε͍͍Μͩʁʁ
ͳΜ͔͔ͬͨؾʹͳΔ • Flamegraph ΛݟΔ • ԣ͕͍ϝιουͷ࣮ΛݟͯΈΔ • ผʹͦΜͳʹͦ͏͡Όͳ͍…… • ͳΔ΄Ͳɺ1ճ͍͚Ͳɺͨ͘͞ΜݺΕͯΔ͚ͩͳͷ͔ʁ
• Ͳ͏͢Ε͍͍Μͩʁʁ ԿΘ͔ͬͯͳ͍ʂʂʂʂʂ
Ͳ͏͢Εྑ͘ͳΔ͔ • ϓϩϑΝΠϧࣗମ • Process/Thread ୯ҐͰऩूͯ͠ɺͦΕͧΕͷࣄͿΓΛݟ͍ͨ • CPU ΛͬͯΔ࣌ؒɺI/O ʹͬͯΔ࣌ؒΛਖ਼֬ʹѲ͍ͨ͠
• ϏδϡΞϥΠβ • ↑ ʹରԠ͍ͨ͠ • ελοΫʹݶΒͣɺҙͷΠϕϯτΛه͍ͨ͠ • HTTP ϦΫΤετͳͲ
ϓϩϑΝΠϧࣗମ • Process/Thread ୯ҐͰऩूͯ͠ɺͦΕͧΕͷࣄͿΓΛݟ͍ͨ • طଘͷ API (rb_pro fi le_frames())
GVL Λ͍࣋ͬͯΔ Thread ͷ ͜ͱ͚ͩڭ͑ͯ͘ΕΔ • ҙͷ Thread ͷใΛऔΕΔ৽ API ΛೖΕ͍ͨ (ruby/ruby#7784) • CPU ΛͬͯΔ࣌ؒɺI/O ʹͬͯΔ࣌ؒΛਖ਼֬ʹѲ͍ͨ͠ • Ruby 3.2 Ͱೖͬͨ hook (RUBY_INTERNAL_THREAD_EVENT_*) ͰͱΕΔ Ruby ʹඞཁͳػೳΛ͍ͯ͘͠
ϏδϡΞϥΠβ ڊਓͷݞʹ૬Γ͠Α͏ • ύϑΥʔϚϯεΛؤுͬͯΔਓ͕ͨͪྑ͍ͷΛ࡞͍ͬͯΔͣ • ؤுͬͯΔਓͨͪ = Firefox, Chrome ͷਓͨͪ
• ͜ΕΛ͍͍ײ͡ʹ׆༻Ͱ͖ͳ͍͔
Chrome ui.prefetto.dev
Firefox profiler.firefox.com
͍͢͝ • ϒϥβͰى͖͍ͯΔ͜ͱΛͯ͢ՄࢹԽͰ͖ΔҙࢥΛײ͡Δ • ͔͍͍ͬ͜ʂ • ศརͦ͏ʂ • ͷͰɺޓͳܗࣜͷϓϩϑΝΠϧΛ Ruby
Ͱग़ྗͰ͖ΔΑ͏ʹͨ͠
ϓϩϑΝΠϥΛࢼ࡞ͯ͠Έ͍ͯ·͢ https://github.com/osyoyu/pf2 • ඪʮใΛͰ͖Δ͚ͩूͰ͖ΔϓϩϑΝΠϥʯ • ϓϩϑΝΠϦϯά෦ rb_pro fi le_frames() API
Λͪΐͬͱ֦ு • (rb_thread_pro fi le_frames() (ruby/ruby#7784) ͕ͳ͍طଘͷ Ruby Ͱಈ͖·ͤΜ…… ͳͷͰϦϦʔεͯ͠·ͤΜ……) • ϏδϡΞϥΠβʹ Firefox Pro fi ler Λ࠾༻
ϓϩϑΝΠϥΛࢼ࡞ͯ͠Έ͍ͯ·͢ https://github.com/osyoyu/pf2 • ϓϩϑΝΠϦϯά෦ͷΞΠσΞ͕৽ͳΘ͚Ͱͳ͍ • rb_pro fi le_frames() API Λ֦ு͍ͯ͠Δ
• ϏδϡΞϥΠβʹ Firefox Pro fi ler Λ࠾༻
ྫ: Ϛϯσϧϒϩू߹Λฒྻܭࢉ • ڻҟతฒྻԽՄೳ (embarrassingly parallell) Β͍͠ • σʔλͷड͚͠ͱ͔͠ͳ͍͍ͯ͘ •
ΞϜμʔϧઌੜت • ͔͠͠ݱ࣮ • 1 thread 148.04 seconds 16 threads 147.94 seconds
ྫ: Ϛϯσϧϒϩू߹Λฒྻܭࢉ • ͦ͝·Έ͍ͨͳόʔ͕͍ͭͯΔ෦͕ Thread ͕ GVL Λ͍࣋ͬͯͯ ࣮ࡍʹܭࢉΛͰ͖͍ͯΔ෦
ྫ: Ϛϯσϧϒϩू߹Λฒྻܭࢉ ֓؍ɻࡶͳฒྻ࣮ͰɺͲͷΈͪҰ෦ͷεϨουʹܭࢉ͕ภΔ͜ͱ͕Θ͔Δ
Future work • ϦϦʔε • GitHub ʹҰԠஔ͍ͯΔ͚Ͳɺruby master ͰϏϧυͰ͖·ͤΜ •
rb_thread_pro fi le_frames() (ruby/ruby#7784) Λ Ϛʔδ·Ͱ͍͔ͬͯͳ͍ͱ͍͚ͳ͍ • ศརͳػೳͷՃ • ҙͷλΠϛϯάͰϚʔΧʔΛଧͯΔػೳ • ϒϥβͷ User Timings API (performance.mark) తͳΠϝʔδ • ͍͍ػೳืूத • Stackprof Ҏ֎ʹ༗ྗͳϓϩϑΝΠϥطʹ͍͔ͭ͋͘ΔͷͰɺ ৽͍͠ͷͱͯ͠ग़͖͔͢ߟ͍͑ͯΔ……