tools/perf/pmu-events/metric_test.py

Source file repositories/reference/linux-study-clean/tools/perf/pmu-events/metric_test.py

File Facts

System
Linux kernel
Corpus path
tools/perf/pmu-events/metric_test.py
Extension
.py
Size
6127 bytes
Lines
173
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/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)

    before = r'a + 3e-12 + 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'

Annotation

Implementation Notes