tests: kernel: timer: behavior: pytest: Adjust max stddev

Like in C test. If MAX STDDEV is lower than single clock cycle then set it to a single clock cycle. Signed-off-by: Krzysztof Chruściński <[email protected]>
zephyrproject-rtos · Jun 26, 2024 · ebc0a71 · ebc0a71
1 parent 72bae8f
commit ebc0a71
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/tests/kernel/timer/timer_behavior/pytest/test_timer.py b/tests/kernel/timer/timer_behavior/pytest/test_timer.py
@@ -37,7 +37,10 @@ def do_analysis(test, stats, stats_count, config, sys_clock_hw_cycles_per_sec):
     max_bound = (test_period + period_max_drift * test_period +
                  expected_period_drift) / 1_000_000
 
+    cyc_us = 1000000 / sys_clock_hw_cycles_per_sec
     max_stddev = int(config['TIMER_TEST_MAX_STDDEV']) / 1_000_000
+    # Max STDDEV cannot be lower than clock single cycle
+    max_stddev = max(cyc_us, max_stddev)
 
     max_drift_ppm = int(config['TIMER_EXTERNAL_TEST_MAX_DRIFT_PPM'])
     time_diff = stats['total_time'] - seconds - expected_total_drift