38 lines
1.0 KiB
Plaintext
38 lines
1.0 KiB
Plaintext
NAME = 'monotonic_time'
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AUTHOR = 'Michael Davidson <md@google.com>'
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TIME = 'MEDIUM'
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TEST_CLASS = 'Kernel'
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TEST_CATEGORY = 'Functional'
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TEST_TYPE = 'client'
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DOC = """
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monotonic_time checks various time interfaces:
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gettimeofday()
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clock_gettime(CLOCK_MONTONIC)
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TSC
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for monotonicity.
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Based on time-warp-test.c by Ingo Molnar.
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"""
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#
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# Test gettimeofday(), TSC, and clock_gettime(CLOCK_MONOTONIC)
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#
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# Tests run for 'duration' seconds and check that the selected
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# time interface does not go backwards by more than 'threshold'.
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#
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# Note that the threshold value has the same resolution as the
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# clock source:
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# gettimeofday() - microseconds
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# clock_gettime(CLOCK_MONOTONIC) - nanoseconds
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# TSC - CPU clock cycles
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#
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#
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job.run_test('monotonic_time', tag='gtod', test_type='gtod',
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duration=300, threshold=0)
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job.run_test('monotonic_time', tag='clock', test_type='clock',
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duration=300, threshold=0)
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job.run_test('monotonic_time', tag='tsc', test_type='tsc',
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duration=300, threshold=0)
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