linux.git/tools/testing/selftests/timers/Makefile, branch v4.4

timers, kselftest: Add 'adjtick' test to validate adjtimex() tick adjustments

2015-10-12T07:51:34+00:00

Recently a kernel side NTP bug was fixed via the following commit:

  2619d7e9c92d ("time: Fix timekeeping_freqadjust()'s incorrect use of abs() instead of abs64()")

When the bug was reported it was difficult to detect, except by
tweaking the adjtimex tick value, and noticing how quickly the
adjustment took:

	https://lkml.org/lkml/2015/9/1/488

Thus this patch introduces a new test which manipulates the
adjtimex tick value and validates that the results are what we
expect.

Signed-off-by: John Stultz 
Cc: Linus Torvalds 
Cc: Miroslav Lichvar 
Cc: Nuno Gonçalves 
Cc: Peter Zijlstra 
Cc: Prarit Bhargava 
Cc: Richard Cochran 
Cc: Shuah Khan 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1444094217-20258-1-git-send-email-john.stultz@linaro.org
[ Tidied up the code and the changelog a bit. ]
Signed-off-by: Ingo Molnar

Documentation, split up rtc.txt into documentation and test file

2015-03-25T04:01:58+00:00

This patch splits rtc.txt into two separate files, one for the
documentation itself, and the other for the rtctest.c file.  The rtctest
file is moved into the kernel tools/testing/selftests/timers directory.
This will make automated testing easier.  Note that the only difference in
the rtc.txt file is that the location of the rtctest.c file has changed.

Signed-off-by: Prarit Bhargava 
Acked-by: Jonathan Corbet 
Acked-by: John Stultz 
Cc: corbet@lwn.net
Cc: rtc-linux@googlegroups.com
Cc: linux-doc@vger.kernel.org
Cc: a.zummo@towertech.it
Cc: prarit@redhat.com
Cc: john.stultz@linaro.org
Cc: shuahkh@osg.samsung.com
Signed-off-by: Shuah Khan

selftests/timers: Use shared logic to run and install tests

2015-03-19T18:03:58+00:00

Change the timers Makefile to make use of shared run and install logic
in lib.mk. Destructive tests are installed but not run by default.

Add a new variable, TEST_PROGS_EXTENDED, which is a list of extra
programs to install, but which are not run by the default run_tests
logic.

Signed-off-by: Michael Ellerman 
Signed-off-by: Shuah Khan

selftests/timers: Add set-2038 test from timetest suite

2015-03-12T19:22:16+00:00

Adds the set-2038 test which sets the time to near-edge cases
like the start and end of the 32 bit epoch and checks that
time behaves properly. There is also a dangerous mode, which
lets the clock roll over past 2038 on 32bit systems, which
on some older kernels will cause system hangs.

Cc: Shuah Khan 
Cc: Prarit Bhargava 
Cc: Thomas Gleixner 
Cc: Richard Cochran 
Signed-off-by: John Stultz 
Tested-by: Prarit Bhargava 
Signed-off-by: Shuah Khan

selftests/timers: Add set-tai from the timetest suite

2015-03-12T19:22:16+00:00

This patch adds the set-tai test which ensures the tai offset
can be set properly from adjtimex.

Cc: Shuah Khan 
Cc: Prarit Bhargava 
Cc: Thomas Gleixner 
Cc: Richard Cochran 
Signed-off-by: John Stultz 
Tested-by: Prarit Bhargava 
Signed-off-by: Shuah Khan

selftests/timers: Add leapcrash test from the timetest suite

2015-03-12T19:22:16+00:00

This change adds the leapcrash test which tests to see if a
leapsecond deadlock which was observed from 2.6.26 to 3.3
is present on this system.

Cc: Shuah Khan 
Cc: Prarit Bhargava 
Cc: Thomas Gleixner 
Cc: Richard Cochran 
Signed-off-by: John Stultz 
Tested-by: Prarit Bhargava 
Signed-off-by: Shuah Khan

selftests/timers: Add leap-a-day test from timetest suite

2015-03-12T19:22:16+00:00

This change adds the leap-a-day test which sets STA_INS and
STA_DEL each day to trigger leapseconds each day. It also
has a mode to jump the time to right before the end of the
day each iteration.

Cc: Shuah Khan 
Cc: Prarit Bhargava 
Cc: Thomas Gleixner 
Cc: Richard Cochran 
Signed-off-by: John Stultz 
Tested-by: Prarit Bhargava 
Signed-off-by: Shuah Khan

selftests/timers: Add clocksource-switch test from timetest suite

2015-03-12T19:22:15+00:00

Adds the clocksource-switch tests which continually switches the
current clocksource between all the available ones, watching for
any timekeeping inconsistencies.

Cc: Shuah Khan 
Cc: Prarit Bhargava 
Cc: Thomas Gleixner 
Cc: Richard Cochran 
Signed-off-by: John Stultz 
Tested-by: Prarit Bhargava 
Signed-off-by: Shuah Khan

selftests/timers: Add skew_consistency test from the timetests suite

2015-03-12T19:22:15+00:00

This change adds the skew_consistency test, which twists the
ADJ_FREQUENCY knob back and forth and watches for timekeeping
inconsistencies.

Cc: Shuah Khan 
Cc: Prarit Bhargava 
Cc: Thomas Gleixner 
Cc: Richard Cochran 
Signed-off-by: John Stultz 
Tested-by: Prarit Bhargava 
Signed-off-by: Shuah Khan

selftests/timers: Add change_skew test from timetest suite

2015-03-12T19:22:15+00:00

This patch adds the change_skew test which validates the
adjtimex freq can be set to various values and then using
the inconsistency-check, raw_skew, and nanosleep tests
ensures time behaves properly.

Cc: Shuah Khan 
Cc: Prarit Bhargava 
Cc: Thomas Gleixner 
Cc: Richard Cochran 
Signed-off-by: John Stultz 
Tested-by: Prarit Bhargava 
Signed-off-by: Shuah Khan