Virtual Machines: Down the Rabbit Hole

Talk given at the Ruby User Group meeting in Berlin.

Transcript

1. Virtual Machines DOWN THE RABBIT HOLE Ruby USER GROUP BERLIN 6. JUNE 2013
2. TXUSTICE
4. POLITICAL SCIENCE DROPOUT
5. DON'T TRUST A WORDI SAY
6. BARCELONA / BERLIN =>
7. PROCESS VIRTUAL MACHINES
8. WHY oh why
9. WHY oh why Portability
10. WHY oh why Portability PERFORMANCE
11. WHY oh why PELICAN
12. wat
13. SOURCE CODE puts "hello world"
14. SOURCE CODE puts "hello world" AST send self puts hello world
15. SOURCE CODE puts "hello world" AST send self puts hello world BYTECODE PUSH_SELF PUSH "puts" PUSH "hello world" CALL 1
16. COMPALER
17. COMPILER
18. BUT HOW DOES A VM LOOK LIKE?
19. HUGE-ASS CASE STATEMENT
20. STACK PUSH 2 PUSH 3 ADD PROGRAM IP 2 * 3
21. 2 STACK PUSH 2 PUSH 3 ADD PROGRAM IP 2 * 3
22. 3 2 STACK PUSH 2 PUSH 3 ADD PROGRAM IP 2 * 3
23. 5 STACK PUSH 2 PUSH 3 ADD PROGRAM IP 2 * 3
24. STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LIT 2 CALL 2 PROGRAM IP puts "hello world", 42 "puts" "hello world" 42 LITERALS
25. <SELF> STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LIT 2 CALL 2 PROGRAM IP puts "hello world", 42 "puts" "hello world" 42 LITERALS
26. "puts" <SELF> STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LIT 2 CALL 2 PROGRAM IP puts "hello world", 42 "puts" "hello world" 42 LITERALS
27. BABY DUCK
28. "hello world" "puts" <SELF> STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LIT 2 CALL 2 PROGRAM IP puts "hello world", 42 "puts" "hello world" 42 LITERALS
29. 42 "hello world" "puts" <SELF> STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LIT 2 CALL 2 PROGRAM IP puts "hello world", 42 "puts" "hello world" 42 LITERALS
30. nil STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LIT 2 CALL 2 PROGRAM IP puts "hello world", 42 "puts" "hello world" 42 LITERALS
31. IT PRINTED "HELLO WORLD" HEH
32. EVER SEEN A FUNCTION? def greet(name) puts "Hello, ", name end
33. STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LOCAL 0 CALL 2 PROGRAM IP def greet(name) puts "Hello, ", name end "puts" "Hello, " LITERALS name: "John" LOCALS
34. <SELF> STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LOCAL 0 CALL 2 PROGRAM IP def greet(name) puts "Hello, ", name end "puts" "Hello, " LITERALS name: "John" LOCALS
35. "puts" <SELF> STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LOCAL 0 CALL 2 PROGRAM IP def greet(name) puts "Hello, ", name end "puts" "Hello, " LITERALS name: "John" LOCALS
36. "Hello, " "puts" <SELF> STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LOCAL 0 CALL 2 PROGRAM IP def greet(name) puts "Hello, ", name end "puts" "Hello, " LITERALS name: "John" LOCALS
37. "John" "Hello, " "puts" <SELF> STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LOCAL 0 CALL 2 PROGRAM IP def greet(name) puts "Hello, ", name end "puts" "Hello, " LITERALS name: "John" LOCALS
38. nil STACK PUSH_SELF PUSH_LIT 0 PUSH_LIT 1 PUSH_LOCAL 0 CALL 2 PROGRAM IP def greet(name) puts "Hello, ", name end "puts" "Hello, " LITERALS name: "John" LOCALS
39. GARBAGE COLLECTION
40. THE ALLOCATOR
41. WHAT'S THE OPPOSITE OF AN ALLIGATOR?
42. REFERENCE COUNTING object.refcount++ WHEN WE PUSH AN OBJECT TO THE STACK object.refcount-- WHEN WE POP AN OBJECT FROM THE STACK BROUGHT TO YOU BY NAIVETY
43. COOLER ALGORITHMS GENERATIONAL BAKER'S TREADMILL BROUGHT TO YOU BY COMPUTER SCIENCE MASTERMINDS REAL-TIME INCREMENTAL NON-MOVING NON-COPYING MOVING COPYING CONCURRENT BITMAP MARKING TRICOLOR STOP-THE-WORLD MARK & SWEEP BACON-FLAVOURED SENTIMENTAL KEBAP
44. JUST IN TIME
45. JUST IN TIME COMPILING VM Bytecode MACHINE CODE x86 x86_64 arm
46. CHECK THIS OUT breaux: even cooler cool IF THIS TOPIC IS RELEVANT TO YOUR INTERESTS
47. THANKS! txustice txus QUESTIONS?