1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
extension Processor {
#if PROCESSOR_MEASUREMENTS_ENABLED
struct ProcessorMetrics {
var instructionCounts: [Instruction.OpCode: Int] = [:]
var backtracks: Int = 0
var resets: Int = 0
var cycleCount: Int = 0
var isTracingEnabled: Bool = false
var shouldMeasureMetrics: Bool = false
init(isTracingEnabled: Bool, shouldMeasureMetrics: Bool) {
self.isTracingEnabled = isTracingEnabled
self.shouldMeasureMetrics = shouldMeasureMetrics
}
}
#else
struct ProcessorMetrics {
var isTracingEnabled: Bool { false }
var shouldMeasureMetrics: Bool { false }
var cycleCount: Int { 0 }
init(isTracingEnabled: Bool, shouldMeasureMetrics: Bool) { }
}
#endif
}
extension Processor {
mutating func startCycleMetrics() {
#if PROCESSOR_MEASUREMENTS_ENABLED
if metrics.cycleCount == 0 {
trace()
measureMetrics()
}
#endif
}
mutating func endCycleMetrics() {
#if PROCESSOR_MEASUREMENTS_ENABLED
metrics.cycleCount += 1
trace()
measureMetrics()
_checkInvariants()
#endif
}
}
extension Processor.ProcessorMetrics {
mutating func addReset() {
#if PROCESSOR_MEASUREMENTS_ENABLED
self.resets += 1
#endif
}
mutating func addBacktrack() {
#if PROCESSOR_MEASUREMENTS_ENABLED
self.backtracks += 1
#endif
}
}
extension Processor {
#if PROCESSOR_MEASUREMENTS_ENABLED
func printMetrics() {
print("===")
print("Total cycle count: \(metrics.cycleCount)")
print("Backtracks: \(metrics.backtracks)")
print("Resets: \(metrics.resets)")
print("Instructions:")
let sorted = metrics.instructionCounts
.filter({$0.1 != 0})
.sorted(by: { (a,b) in a.1 > b.1 })
for (opcode, count) in sorted {
print("> \(opcode): \(count)")
}
print("===")
}
mutating func measure() {
let (opcode, _) = fetch()
if metrics.instructionCounts.keys.contains(opcode) {
metrics.instructionCounts[opcode]! += 1
} else {
metrics.instructionCounts.updateValue(1, forKey: opcode)
}
}
mutating func measureMetrics() {
if metrics.shouldMeasureMetrics {
measure()
}
}
#endif
}
|
