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a687a26f42
- xtimer_usleep(timeout) should sleep for at least timeout us. Negative offset, i.e. sleeping less than the specified time is incorrect.
62 lines
2.2 KiB
Python
Executable File
62 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# vim:fenc=utf-8
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# Copyright (C) 2017 Francisco Acosta <francisco.acosta@inria.fr>
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# 2017 Freie Universität Berlin
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#
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# This file is subject to the terms and conditions of the GNU Lesser
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# General Public License v2.1. See the file LICENSE in the top level
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# directory for more details.
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import sys
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import time
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from testrunner import run
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US_PER_SEC = 1000000
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INTERNAL_JITTER = 0.05
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EXTERNAL_JITTER = 0.15
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class InvalidTimeout(Exception):
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pass
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def testfunc(child):
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child.expect(u"Running test (\\d+) times with (\\d+) distinct sleep times")
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RUNS = int(child.match.group(1))
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SLEEP_TIMES_NUMOF = int(child.match.group(2))
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try:
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child.expect_exact(u"Please hit any key and then ENTER to continue")
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child.sendline(u"a")
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start_test = time.time()
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for m in range(RUNS):
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for n in range(SLEEP_TIMES_NUMOF):
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child.expect(u"Slept for (\\d+) us \\(expected: (\\d+) us\\) Offset: (-?\\d+) us")
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sleep_time = int(child.match.group(1))
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exp = int(child.match.group(2))
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upper_bound = exp + (exp * INTERNAL_JITTER)
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if not (exp < sleep_time < upper_bound):
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delta = (upper_bound-exp)
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error = min(upper_bound-sleep_time, sleep_time-exp)
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raise InvalidTimeout("Invalid timeout %d, expected %d < timeout < %d"
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"\nHost max error\t%d\nerror\t\t%d" %
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(sleep_time, exp, upper_bound,
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delta, error))
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testtime = (time.time() - start_test) * US_PER_SEC
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child.expect(u"Test ran for (\\d+) us")
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exp = int(child.match.group(1))
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lower_bound = exp - (exp * EXTERNAL_JITTER)
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upper_bound = exp + (exp * EXTERNAL_JITTER)
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if not (lower_bound < testtime < upper_bound):
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raise InvalidTimeout("Host timer measured %d us (client measured %d us)" %
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(testtime, exp))
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except InvalidTimeout as e:
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print(e)
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sys.exit(1)
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if __name__ == "__main__":
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sys.exit(run(testfunc))
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