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cpm at okinawa
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Shoichi Kaji
August 27, 2016
Programming
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cpm at okinawa
2016.08.27 okinawa.pm
Shoichi Kaji
August 27, 2016
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Transcript
cpm Shoichi Kaji
About me • Shoichi Kaji • Born in 1984 •
Born in Kanagawa, live in Tokyo • Work for Yahoo JAPAN • pause/github: skaji • perl5: cpm, Mojo::SlackRTM • perl6: mi6, frinfon
cpm fast CPAN module installer
None
None
cpm is 3x faster than cpanm
ࠓ͍ͨ͜͠ͱ • ͳͥcpmΛͭ͘Ζ͏ͱࢥ͔ͬͨ • ͞Λ࣮ݱ͢ΔͨΊͷ࣮Ҋ • CPAN moduleΠϯετʔϧฒྻԽԿ͕໘͔ • ͦͷ໘͞Λ͍͔ʹγϯϓϧʹଊ͔͑ͨ
• ࣮ͷΩʔϙΠϯτ • ݱঢ়ͷ࣮ • ࠓޙ
ͳͥcpmΛͭ͘Ζ͏ͱࢥ͔ͬͨ • CPAN moduleΛ͍͍ͭͬͯͨ (ͪΖΜࠓ) • ͬͱ͘ΠϯετʔϧͰ͖Εͳɺͱ͍ͭࢥͬ ͍ͯͨ • CPAN
moduleΠϯετʔϧ͋ΔछϒϥοΫϘο Ϋεͱͳ͍ͬͯͯखΛग़͢ਓඇৗʹݶΒΕ͍ͯͨ • ͷࢼ͠ɺͬͯΈΑ͏
ͳͥcpmΛͭ͘Ζ͏ͱࢥ͔ͬͨ • ͍ͨ͘͠ͱ͍͏ࢥ͍͕CPAN clientʹ࣮ࡍʹखΛग़ ͖͔͚ͬ͢Ͱ͋Δ͜ͱؒҧ͍ͳ͍͕ɺͦΕҎ֎ʹ • CPANʹ·ͭΘΔऔΓܾΊΛͬͱγϯϓϧʹͰ͖ ͳ͍͔ɻͦ͏ͳΕɺࣗΛؚΊͯΈΜͳͬͱ؆ ୯ʹCPANΛhackͰ͖ΔΑ͏ʹͳΓָͦ͠͏ •
ͱ͍͏ࢥ͍͕͋ͬͨɻͦͷ࣮ྫͱͳΔΛ͔ͨͬ͠ ͨɻ
͞Λ࣮ݱ͢ΔͨΊͷ࣮Ҋ • cpanm"ྻ"ʹCPAN moduleΛΠϯετʔϧ͍ͯͨ͘͠Ί ͋·Γ͘ͳ͍ɻͲ͏͢Δ͔ɻ(perl5Ͱ"͞"ΛٻΊΔͱ͢Ε event driven or fork(2)ͱ͍͏͜ͱʹͳΔɻ) •
(Ҋ1) event driven Ͱ͖ΔݶΓcpanmͷίʔυΛ࠶ར༻͔ͨͬͨ͠ɻevent drivenͷίʔυͷதͰcpanmΛ͏ͷͪΐͬͱແཧɻ • (Ҋ2) forkΛ͏ ·͋ͪ͜ΒͰɻ
CPAN moduleฒྻԽ Կ͕໘͔ • ࣄલʹͯ͢ͷtask͕ܾ·͍ͬͯͳ͍ɻ ྫ͑ PlackΛΠϯετʔϧ͠Α͏ͱ͢Δͱ͖ • ࠷ॳ"PlackΠϯετʔϧ"ͱ͍͏task͚͕ͩͩ •
ͦΕͷmetadataΛfetchͨ͠ஈ֊ͰॳΊͯ File::ShareDir::InstallͷΠϯετʔϧඞཁͩͱൃ֮͢Δɻ • ͞ΒʹFSDIͷmetadataΛfetch͢ΔͱModule::Build::Tiny ඞཁͩͱൃ֮͢Δɻblah blah blah…
ͦͷ໘͞Λ͍͔ʹ γϯϓϧʹଊ͔͑ͨ • (1) "CPAN moduleΠϯετʔϧ"Λɺ ಠཱͰ࣮ߦՄೳͳࡉ͔͍taskʹ͚Δɻ(ࠓճ ͜ͷઆ໌লུ) • (2)
ͦͷtaskΛworkerʹৼΓɺ݁ՌΛऩूͯ͠ɺ ͞Βʹ৽ͨͳtask͕ੜ·ΕΕɺ࠶ͼworkerʹ ৼΔɻ͜ΕΛtask͕ͳ͘ͳΔ·Ͱ܁Γฦ͢ɻ
(2)ͷ࣮ΩʔϙΠϯτ • (point1) workerʹtaskΛৼΔɺͦͯͦ͠ͷ݁Ռ Λऩू͢ΔͨΊʹɺԿ͔͠ΒͷIPC͕ඞཁ • (point2) ৽ͨͳtask͕ੜ·Εͨͱ͖ɺfinished/ readyͳworkerΛૉૣ͘ݕͦ͠ͷworkerʹ taskΛৼΔΈ͕ඞཁ
ૉૣ͘ͱ͍͏ͱ͜Ζ͕ॏཁͰɺ͜Ε͕͍ͱ༡Μ Ͱ͍Δ͕࣌ؒ૿͑ͯશ͘͞ʹͭͳ͕Βͳ͍
• ͡ΊIPCͱͯ͠ϑΝΠϧΛ͍ɺwoker͔Βͷ ݁Ռͷฦ٫ϑΝΠϧʹͦΕΛॻ͘͜ͱͰ࣮ݱ ͠Α͏ͱͨ͠ɻ(ۮવkarupa͞Μͱ͔Ϳͬͨw) • ͦͯ͠filesystemͷchange notifyʹΑͬͯ workerͷfinishedΛݕ͠Α͏ͱͨ͠ɻ • …
͗ͯ͢ෆ࠾༻ɻ
ݱঢ়ͷ࣮ • ݁ہɺIPCͱͯ͠pipe(2)Λ͏͜ͱʹͨ͠ɻworkerͱ ͷؒʹ2ຊͷpipeΛ௨ͯ͠ํͰ௨৴Ͱ͖ΔΑ͏ʹɻ • finishedͳworkerݕselect(2)Λ͏ɻ • ظ௨Γͷ͞ͰfinishedΛݕͰ͖ͨ • ݁Ռɺcpanm
3xͷ͞ͰCPAN moduleΛΠϯετʔ ϧͰ͖ΔΑ͏ʹͳͬͨ
worker worker worker worker main process Parallel::Pipes pipes pipes pipes
pipes ݱঢ়ͷ࣮ (Πϝʔδ)
ࠓޙ • cpm is a fast CPAN module installer •
cpmΛsandboxͱͯ͠CPANͷ͋Δ͖࢟Λࡧͨ͠ ͍ • Ͱɺcpanmʹ͍͍ͱ͜ΖΛؐݩ͢Δʂ • cpmͷparallelͷ෦Parallel::Pipesͱͯ͠Ϟδϡʔ ϧʹͤͨ͞ɻଞʹԠ༻Մೳͩͱࢥ͍ͬͯΔͷͰɺ ୭͔ʹͬͯΒ͍͍ͨ :-)