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kselftests: timers: freq-step: Update maximum acceptable precision and errors 

PTI has a significant impact on precision of the MONOTONIC_RAW clock,
which prevents a lot of computers from running the freq-step test.
Increase the maximum acceptable precision for the test to not be skipped
to 500 nanoseconds.

After commit 78b98e3c5a ("timekeeping/ntp: Determine the multiplier
directly from NTP tick length") the frequency and time errors should be
much smaller. Reduce the maximum acceptable values for the test to pass
to 0.02 ppm and 50 nanoseconds respectively.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Link: https://lkml.kernel.org/r/20190618160612.21957-1-mlichvar@redhat.com
This commit is contained in:
Miroslav Lichvar 2019-06-18 18:06:12 +02:00 committed by Thomas Gleixner
parent d897a4ab11
commit d21e43f2ef
1 changed files with 3 additions and 3 deletions
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6
tools/testing/selftests/timers/freq-step.c
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@ -21,9 +21,9 @@
#define SAMPLE_READINGS 10
#define MEAN_SAMPLE_INTERVAL 0.1
#define STEP_INTERVAL 1.0
#define MAX_PRECISION 100e-9
#define MAX_FREQ_ERROR 10e-6
#define MAX_STDDEV 1000e-9
#define MAX_PRECISION 500e-9
#define MAX_FREQ_ERROR 0.02e-6
#define MAX_STDDEV 50e-9
#ifndef ADJ_SETOFFSET
#define ADJ_SETOFFSET 0x0100