Link
Embed
Share
Beginning
This slide
Copy link URL
Copy link URL
Copy iframe embed code
Copy iframe embed code
Copy javascript embed code
Copy javascript embed code
Share
Tweet
Share
Tweet
Slide 1
Slide 1 text
@Scalone Concurrency in the imperative and functional world
Slide 2
Slide 2 text
Thiago Scalone thiago@scalone.com.br @scalone
Slide 3
Slide 3 text
No content
Slide 4
Slide 4 text
No content
Slide 5
Slide 5 text
No content
Slide 6
Slide 6 text
… nothing new … DISCLAIMER
Slide 7
Slide 7 text
If you don't understand concurrency… it isn’t problem if doesn't make part of your day. DISCLAIMER
Slide 8
Slide 8 text
Context 1
Slide 9
Slide 9 text
No content
Slide 10
Slide 10 text
No content
Slide 11
Slide 11 text
No content
Slide 12
Slide 12 text
No content
Slide 13
Slide 13 text
No content
Slide 14
Slide 14 text
Context 2
Slide 15
Slide 15 text
No content
Slide 16
Slide 16 text
Concurrency
Slide 17
Slide 17 text
Concurrency Parallelism
Slide 18
Slide 18 text
“Dealing a lot of things at once Rob Pike about Concurrency
Slide 19
Slide 19 text
“Doing a lot of things at once Rob Pike about Parallelism
Slide 20
Slide 20 text
@Scalone
Slide 21
Slide 21 text
@Scalone
Slide 22
Slide 22 text
@Scalone
Slide 23
Slide 23 text
@Scalone
Slide 24
Slide 24 text
@Scalone
Slide 25
Slide 25 text
@Scalone
Slide 26
Slide 26 text
@Scalone
Slide 27
Slide 27 text
Context 3
Slide 28
Slide 28 text
Imperative
Slide 29
Slide 29 text
Imperative
Slide 30
Slide 30 text
Imperative defines computation as statements that change a program state
Slide 31
Slide 31 text
Imperative defines computation as action that change a program state
Slide 32
Slide 32 text
Imperative
Slide 33
Slide 33 text
Imperative
Slide 34
Slide 34 text
Imperative
Slide 35
Slide 35 text
Imperative
Slide 36
Slide 36 text
Imperative Share Memory
Slide 37
Slide 37 text
Imperative Share Memory Side effects
Slide 38
Slide 38 text
Imperative Share Memory Nondeterministic Side effects
Slide 39
Slide 39 text
Functional
Slide 40
Slide 40 text
Functional treats computation as the evaluation of mathematical functions and avoids state and mutable data
Slide 41
Slide 41 text
Functional treats computation as the evaluation of mathematical functions and avoids state and mutable data
Slide 42
Slide 42 text
Functional treats computation as the evaluation of mathematical functions and avoids state and mutable data
Slide 43
Slide 43 text
Functional
Slide 44
Slide 44 text
Functional
Slide 45
Slide 45 text
Functional
Slide 46
Slide 46 text
Functional
Slide 47
Slide 47 text
Functional
Slide 48
Slide 48 text
Functional
Slide 49
Slide 49 text
No content
Slide 50
Slide 50 text
Determinism
Slide 51
Slide 51 text
Determinism - Same In => Same out f(x) -> y
Slide 52
Slide 52 text
Determinism - Same In => Same out no disk I/O f(x) -> y
Slide 53
Slide 53 text
Determinism - Same In => Same out no disk I/O no random() f(x) -> y
Slide 54
Slide 54 text
Determinism - Same In => Same out no disk I/O no side effects no random() f(x) -> y
Slide 55
Slide 55 text
Determinism - Same In => Same out no disk I/O no side effects no random() always the same result f(x) -> y
Slide 56
Slide 56 text
Functional - Bound/Unbound Variable
Slide 57
Slide 57 text
Functional - Bound/Unbound Variable
Slide 58
Slide 58 text
Functional - Bound/Unbound Variable
Slide 59
Slide 59 text
Functional - Bound/Unbound Variable
Slide 60
Slide 60 text
Functional - Bound/Unbound Variable
Slide 61
Slide 61 text
Determinism 24
Slide 62
Slide 62 text
Determinism 24
Slide 63
Slide 63 text
Determinism
Slide 64
Slide 64 text
Concurrency
Slide 65
Slide 65 text
Imperative
Slide 66
Slide 66 text
Threads and Locks
Slide 67
Slide 67 text
Threads and Locks shared memory
Slide 68
Slide 68 text
Thread and Locks
Slide 69
Slide 69 text
Thread and Locks
Slide 70
Slide 70 text
Thread and Locks
Slide 71
Slide 71 text
Thread and Locks
Slide 72
Slide 72 text
Thread and Locks
Slide 73
Slide 73 text
Threads and Locks dataflow variable
Slide 74
Slide 74 text
Threads and Locks dataflow variable functional
Slide 75
Slide 75 text
Thread and Locks
Slide 76
Slide 76 text
Thread and Locks
Slide 77
Slide 77 text
Thread and Locks
Slide 78
Slide 78 text
Thread and Locks Unbound
Slide 79
Slide 79 text
Thread and Locks Unbound
Slide 80
Slide 80 text
Thread and Locks Unbound Bound
Slide 81
Slide 81 text
Determinism
Slide 82
Slide 82 text
Java = Imperative
Slide 83
Slide 83 text
Thread and Locks
Slide 84
Slide 84 text
Thread and Locks
Slide 85
Slide 85 text
Thread and Locks
Slide 86
Slide 86 text
Thread and Locks
Slide 87
Slide 87 text
Thread and Locks
Slide 88
Slide 88 text
Thread and Locks
Slide 89
Slide 89 text
Thread and Locks
Slide 90
Slide 90 text
Thread and Locks
Slide 91
Slide 91 text
Thread and Locks The meaning of life is: ?
Slide 92
Slide 92 text
Thread and Locks The meaning of life is: 0
Slide 93
Slide 93 text
No content
Slide 94
Slide 94 text
Thread and Locks The meaning of life is: 0
Slide 95
Slide 95 text
Thread and Locks Mutable State
Slide 96
Slide 96 text
Thread and Locks Race condition
Slide 97
Slide 97 text
Race Condition the output is dependent on the sequence or timing of other uncontrollable events
Slide 98
Slide 98 text
Thread and Locks Optimization
Slide 99
Slide 99 text
Optimization the compiler is allowed to statically optimize your code by reordering things
Slide 100
Slide 100 text
Optimization the compiler is allowed to statically optimize your code by reordering things
Slide 101
Slide 101 text
Optimization the JVM is allowed to dynamically optimize your code by reordering things
Slide 102
Slide 102 text
Optimization the JVM is allowed to dynamically optimize your code by reordering things
Slide 103
Slide 103 text
Optimization the hardware you’re running on is allowed to optimize performance by reordering things
Slide 104
Slide 104 text
Optimization the hardware you’re running on is allowed to optimize performance by reordering things
Slide 105
Slide 105 text
Thread and Locks synchronize
Slide 106
Slide 106 text
Trade-off + Common + Lock control
Slide 107
Slide 107 text
Trade-off - Lock Control - Mutual Exclusion, dead lock… - Excessive Contention
Slide 108
Slide 108 text
Functional
Slide 109
Slide 109 text
Actor
Slide 110
Slide 110 text
Actor message-passing
Slide 111
Slide 111 text
Actor
Slide 112
Slide 112 text
Actor An object which encapsulates state and communicates with other actors by exchaging messages
Slide 113
Slide 113 text
Actor
Slide 114
Slide 114 text
Actor
Slide 115
Slide 115 text
Goroutines and Channels message-passing
Slide 116
Slide 116 text
Goroutines and Channels
Slide 117
Slide 117 text
Microthreads with a internal scheduler Goroutines and Channels
Slide 118
Slide 118 text
Goroutines and Channels
Slide 119
Slide 119 text
Goroutines and Channels
Slide 120
Slide 120 text
Goroutines and Channels
Slide 121
Slide 121 text
Goroutines and Channels
Slide 122
Slide 122 text
Goroutines and Channels
Slide 123
Slide 123 text
Goroutines and Channels
Slide 124
Slide 124 text
Goroutines and Channels
Slide 125
Slide 125 text
Goroutines and Channels
Slide 126
Slide 126 text
Trade-off + No Sinc + Distribution
Slide 127
Slide 127 text
Trade-off + Incommon + Complex
Slide 128
Slide 128 text
References
Slide 129
Slide 129 text
References
Slide 130
Slide 130 text
References
Slide 131
Slide 131 text
The design and characteristics of a programming language are defined by the creator, based in his problems, at the creation moment @Scalone
Slide 132
Slide 132 text
THANK YOU! @Scalone