diff options
Diffstat (limited to 'test/timer_calib.py')
| -rw-r--r-- | test/timer_calib.py | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/test/timer_calib.py b/test/timer_calib.py deleted file mode 100644 index 2a625d80c7..0000000000 --- a/test/timer_calib.py +++ /dev/null @@ -1,54 +0,0 @@ -# Copyright 2011 The Chromium OS Authors. All rights reserved. -# Use of this source code is governed by a BSD-style license that can be -# found in the LICENSE file. -# -# Check timers behavior -# - -import time - -def one_pass(helper): - helper.wait_output("=== Timer calibration ===") - res = helper.wait_output("back-to-back get_time : (?P<lat>[0-9]+) us", - use_re=True)["lat"] - minlat = int(res) - helper.trace("get_time latency %d us\n" % minlat) - - helper.wait_output("sleep 1s") - t0 = time.time() - second = helper.wait_output("done. delay = (?P<second>[0-9]+) us", - use_re=True)["second"] - t1 = time.time() - secondreal = t1 - t0 - secondlat = int(second) - 1000000 - helper.trace("1s timer latency %d us / real time %f s\n" % (secondlat, - secondreal)) - - - us = {} - for pow2 in range(7): - delay = 1 << (7-pow2) - us[delay] = helper.wait_output("%d us => (?P<us>[0-9]+) us" % delay, - use_re=True)["us"] - helper.wait_output("Done.") - - return minlat, secondlat, secondreal - - -def test(helper): - one_pass(helper) - - helper.ec_command("reboot") - helper.wait_output("--- UART initialized") - - # get the timing results on the second pass - # to avoid binary translation overhead - minlat, secondlat, secondreal = one_pass(helper) - - # check that the timings somewhat make sense - if minlat > 220 or secondlat > 500 or abs(secondreal-1.0) > 0.200: - helper.fail("imprecise timings " + - "(get_time %d us sleep %d us / real time %.3f s)" % - (minlat, secondlat, secondreal)) - - return True # PASS ! |