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JITをたどるとそこはYARVの中
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Tsukasa OISHI
June 21, 2019
Technology
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JITをたどるとそこはYARVの中
Tsukasa OISHI
June 21, 2019
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Transcript
+*5ΛͨͲΔͱ ͦ͜:"37ͷத
͓͓͍͔ͭ͠͞
ruby --jit
def fib(num) if num < 2 num else fib(num -
2) + fib(num - 1) end end
fib(35)
$ time ruby fib.rb real 0m1.636s user 0m1.520s sys 0m0.050s
$ time ruby —jit fib.rb real 0m0.786s user 0m1.280s sys
0m0.050s
Ͳ͏ͯ͘͠ͳΔͷʁ
ϝιουͷόΠτίʔυΛ $ʹมͯ͠ίϯύΠϧ͠ ͯTPϑΝΠϧΛ࡞ͯ͠ EMTZNͯ͠खʹೖΕͨؔ ϙΠϯλΛͬͯϚγϯޠ
1IPUPCZ"MFYJT#SPXOPO6OTQMBTI ͍ͭ͜ɺͳʹݴͬͯΜͩʁ
7.Α͘Βͳ͍͚Ͳ ͍ͬͯΔΑ͏ͳإ ͠ͱ͜͏ 1IPUPCZ$BMMVN8BMFPO6OTQMBTI
None
:"37 3VCZ7. ΛΕ+*5 Θ͔Δ ͣ
͋ͱͰ3VCZ,BJHJ ͷ+*5ͷηογϣϯ͕ Θ͔ΔΑ͏ʹͳΓ·͢ ͣ
ίϯϐϡʔλ
None
ిࢠܭࢉػ
2 * 3 + 4 * 5
2 3 * 4 5 * +
2 3 * 4 5 * + ελοΫ
2 3 * 4 5 * + ελοΫ 2 PUSH
2
2 3 * 4 5 * + ελοΫ 2 3
PUSH 2 PUSH 3
2 3 * 4 5 * + ελοΫ 6 PUSH
2 PUSH 3 MUL
2 3 * 4 5 * + ελοΫ 6 4
PUSH 2 PUSH 3 MUL PUSH 4
2 3 * 4 5 * + ελοΫ 6 4
5 PUSH 2 PUSH 3 MUL PUSH 4 PUSH 5
2 3 * 4 5 * + ελοΫ 6 20
PUSH 2 PUSH 3 MUL PUSH 4 PUSH 5 MUL
2 3 * 4 5 * + ελοΫ 26 PUSH
2 PUSH 3 MUL PUSH 4 PUSH 5 MUL ADD
3VCZ͚͕ͩಈ͘ઐ༻ͷίϯϐϡʔλ
2 * 3 + 4 * 5
2 3 * 4 5 * +
2 3 * 4 5 * + ελοΫ
2 3 * 4 5 * + ελοΫ 2 putobject
2
2 3 * 4 5 * + ελοΫ 2 3
putobject 2 putobject 3
2 3 * 4 5 * + ελοΫ 6 putobject
2 putobject 3 opt_mult mid:*, argc:1
2 3 * 4 5 * + ελοΫ 6 4
putobject 2 putobject 3 opt_mult mid:*, argc:1 putobject 4
2 3 * 4 5 * + ελοΫ 6 4
5 putobject 2 putobject 3 opt_mult mid:*, argc:1 putobject 4 putobject 5
2 3 * 4 5 * + ελοΫ 6 20
putobject 2 putobject 3 opt_mult mid:*, argc:1 putobject 4 putobject 5 opt_mult mid:*, argc:1
2 3 * 4 5 * + ελοΫ 26 putobject
2 putobject 3 opt_mult mid:*, argc:1 putobject 4 putobject 5 opt_mult mid:*, argc:1 opt_plus mid:+, argc:1
2 3 * 4 5 * + ελοΫ 26 putobject
2 putobject 3 opt_mult mid:*, argc:1 putobject 4 putobject 5 opt_mult mid:*, argc:1 opt_plus mid:+, argc:1 όΠτίʔυ
ϝιουͷόΠτίʔυΛ $ʹมͯ͠ίϯύΠϧ͠ ͯTPϑΝΠϧΛ࡞ͯ͠ EMTZNͯ͠खʹೖΕͨؔ ϙΠϯλΛͬͯϚγϯޠ
putobject 2 putobject 3 opt_mult mid:*, argc:1 putobject 4 putobject
5 opt_mult mid:*, argc:1 opt_plus mid:+, argc:1 όΠτίʔυ :"37 3VCZ7.
putobject 2 putobject 3 opt_mult mid:*, argc:1 putobject 4 putobject
5 opt_mult mid:*, argc:1 opt_plus mid:+, argc:1 όΠτίʔυ :"37 3VCZ7.
putobject 2 putobject 3 opt_mult mid:*, argc:1 putobject 4 putobject
5 opt_mult mid:*, argc:1 opt_plus mid:+, argc:1 όΠτίʔυ :"37 3VCZ7. ϋʔυΣΞͰͳ͘ ιϑτΣΞͰԾతʹ࡞ΒΕͨܭࢉػ
+VTU*O5JNF $PNQJMFS
ͳΜͷͨΊʹʁ 1IPUPCZ+F[5JNNTPO6OTQMBTI
ͬͱ͘
putobject 2 putobject 3 opt_mult mid:*, argc:1 :"37 3VCZ7.
putobject 2 putobject 3 opt_mult mid:*, argc:1 :"37 3VCZ7. όΠτίʔυΛCʹมͯ͠
ίϯύΠϧͯ͠࡞ͨ͠ .soϑΝΠϧ
putobject 2 putobject 3 opt_mult mid:*, argc:1 :"37 3VCZ7. όΠτίʔυΛCʹมͯ͠
ίϯύΠϧͯ͠࡞ͨ͠ .soϑΝΠϧ
3VCZͷ+*5
ݺͼग़͠ճͷ ଟ͍ϝιουΛ +*5͢Δ
+*5ͯ͠ϦϯΫ ͢Δϝιου ʹ্ݶ͕͋Δ
3VCZͷ+*5
--jit-max-cache=num Max number of methods to be JIT-ed in a
cache (default: 1000) --jit-min-calls=num Number of calls to trigger JIT (for testing, default: 5)
3VCZQSFWJFX ͷ+*5
--jit-max-cache=num Max number of methods to be JIT-ed in a
cache (default: 100) --jit-min-calls=num Number of calls to trigger JIT (for testing, default: 10000)
3VCZ,BJHJͷ+*5ͷ ηογϣϯΛ:PV5VCFͰݟΑ͏