summaryrefslogtreecommitdiffstats
path: root/tools/perf/pmu-events/metric_test.py
blob: ee22ff43ddd7e92c1f223809757c5c00e7768138 (plain)
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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
#!/usr/bin/env python3
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
import unittest
from metric import Constant
from metric import Event
from metric import Expression
from metric import ParsePerfJson
from metric import RewriteMetricsInTermsOfOthers


class TestMetricExpressions(unittest.TestCase):

  def test_Operators(self):
    a = Event('a')
    b = Event('b')
    self.assertEqual((a | b).ToPerfJson(), 'a | b')
    self.assertEqual((a ^ b).ToPerfJson(), 'a ^ b')
    self.assertEqual((a & b).ToPerfJson(), 'a & b')
    self.assertEqual((a < b).ToPerfJson(), 'a < b')
    self.assertEqual((a > b).ToPerfJson(), 'a > b')
    self.assertEqual((a + b).ToPerfJson(), 'a + b')
    self.assertEqual((a - b).ToPerfJson(), 'a - b')
    self.assertEqual((a * b).ToPerfJson(), 'a * b')
    self.assertEqual((a / b).ToPerfJson(), 'a / b')
    self.assertEqual((a % b).ToPerfJson(), 'a % b')
    one = Constant(1)
    self.assertEqual((a + one).ToPerfJson(), 'a + 1')

  def test_Brackets(self):
    a = Event('a')
    b = Event('b')
    c = Event('c')
    self.assertEqual((a * b + c).ToPerfJson(), 'a * b + c')
    self.assertEqual((a + b * c).ToPerfJson(), 'a + b * c')
    self.assertEqual(((a + a) + a).ToPerfJson(), 'a + a + a')
    self.assertEqual(((a + b) * c).ToPerfJson(), '(a + b) * c')
    self.assertEqual((a + (b * c)).ToPerfJson(), 'a + b * c')
    self.assertEqual(((a / b) * c).ToPerfJson(), 'a / b * c')
    self.assertEqual((a / (b * c)).ToPerfJson(), 'a / (b * c)')

  def test_ParsePerfJson(self):
    # Based on an example of a real metric.
    before = '(a + b + c + d) / (2 * e)'
    after = before
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

    # Parsing should handle events with '-' in their name. Note, in
    # the json file the '\' are doubled to '\\'.
    before = r'topdown\-fe\-bound / topdown\-slots - 1'
    after = before
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

    # Parsing should handle escaped modifiers. Note, in the json file
    # the '\' are doubled to '\\'.
    before = r'arb@event\=0x81\,umask\=0x1@ + arb@event\=0x84\,umask\=0x1@'
    after = before
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

    # Parsing should handle exponents in numbers.
    before = r'a + 1e12 + b'
    after = before
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

  def test_IfElseTests(self):
    # if-else needs rewriting to Select and back.
    before = r'Event1 if #smt_on else Event2'
    after = f'({before})'
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

    before = r'Event1 if 0 else Event2'
    after = f'({before})'
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

    before = r'Event1 if 1 else Event2'
    after = f'({before})'
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

    # Ensure the select is evaluate last.
    before = r'Event1 + 1 if Event2 < 2 else Event3 + 3'
    after = (r'Select(Event(r"Event1") + Constant(1), Event(r"Event2") < '
             r'Constant(2), Event(r"Event3") + Constant(3))')
    self.assertEqual(ParsePerfJson(before).ToPython(), after)

    before = r'Event1 > 1 if Event2 < 2 else Event3 > 3'
    after = (r'Select(Event(r"Event1") > Constant(1), Event(r"Event2") < '
             r'Constant(2), Event(r"Event3") > Constant(3))')
    self.assertEqual(ParsePerfJson(before).ToPython(), after)

    before = r'min(a + b if c > 1 else c + d, e + f)'
    after = r'min((a + b if c > 1 else c + d), e + f)'
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

    before = r'a if b else c if d else e'
    after = r'(a if b else (c if d else e))'
    self.assertEqual(ParsePerfJson(before).ToPerfJson(), after)

  def test_ToPython(self):
    # pylint: disable=eval-used
    # Based on an example of a real metric.
    before = '(a + b + c + d) / (2 * e)'
    py = ParsePerfJson(before).ToPython()
    after = eval(py).ToPerfJson()
    self.assertEqual(before, after)

  def test_Simplify(self):
    before = '1 + 2 + 3'
    after = '6'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = 'a + 0'
    after = 'a'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = '0 + a'
    after = 'a'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = 'a | 0'
    after = 'a'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = '0 | a'
    after = 'a'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = 'a * 0'
    after = '0'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = '0 * a'
    after = '0'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = 'a * 1'
    after = 'a'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = '1 * a'
    after = 'a'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = 'a if 0 else b'
    after = 'b'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = 'a if 1 else b'
    after = 'a'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    before = 'a if b else a'
    after = 'a'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

    # Pattern used to add a slots event to metrics that require it.
    before = '0 * SLOTS'
    after = '0 * SLOTS'
    self.assertEqual(ParsePerfJson(before).Simplify().ToPerfJson(), after)

  def test_RewriteMetricsInTermsOfOthers(self):
    Expression.__eq__ = lambda e1, e2: e1.Equals(e2)
    before = [('cpu', 'm1', ParsePerfJson('a + b + c + d')),
              ('cpu', 'm2', ParsePerfJson('a + b + c'))]
    after = {('cpu', 'm1'): ParsePerfJson('m2 + d')}
    self.assertEqual(RewriteMetricsInTermsOfOthers(before), after)
    Expression.__eq__ = None

if __name__ == '__main__':
  unittest.main()