Re: [PATCH 00/19 v3] Add timekeeping tests to kernel selftest

[Prarit Bhargava]

On 03/02/2015 04:09 PM, John Stultz wrote:
> I've hosted my timekeeping tests on github for the last few years:
> 	https://github.com/johnstultz-work/timetests
> 
> but I suspect not too many folks have actually used them.
> 
> I've been meaning to get them reworked and submitted into the
> selftest infrastructure, but haven't had much time until
> recently.
> 
> I've added both the non-desctructive and destructive tests
> (which set the time, possibly to strange values, or tries
> to trigger historical issues that could crash the machine).
> The destructive tests are run (as root, or with proper
> privledge) via:
> 	# make run_destructive_tests

I ran these across several systems including s390, powerpc, and x86 (64 bit
only).  I didn't see anything weird and AFAICT the tests work.

Tested-by: Prarit Bhargava <prarit@xxxxxxxxxx>

P.
> 
> Changes in v3:
> * Lots of -Wall build warning fixups
> * Handle the CROSS_COMPILER build variable properly
>  (Thanks to LinusW for pointing that out)
> * Integrate w/ ksft_exit_* infrastructure
> 
> Let me know if there is any further comments or feedback!
> 
> thanks
> -john
> 
> Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
> Cc: Prarit Bhargava <prarit@xxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Richard Cochran <richardcochran@xxxxxxxxx>
> 
> John Stultz (19):
>   selftests/timers: Cleanup Makefile to make it easier to add future
>     tests
>   selftests/timers: Quiet warning due to lack of return check on brk
>   selftests/timers: Add nanosleep test from timetest suite
>   selftests/timers: Add inconsistency-check test from timetests
>   selftests/timers: Add nsleep-lat test from timetest suite
>   selftests/timers: Add clock skew estimation test from timetest suite
>   selftests/timers: Add set-timer-lat test from timetest suite
>   selftests/timers: Add threaded time inconsistency test from timetest
>     suite
>   selftests/timers: Add mqueue latency test from the timetest suite
>   selftests/timers: Add adjtimex validation test from timetest suite
>   selftests/timers: Add alarmtimer-suspend test from timetests suite
>   selftests/timers: Add change_skew test from timetest suite
>   selftests/timers: Add skew_consistency test from the timetests suite
>   selftests/timers: Add clocksource-switch test from timetest suite
>   selftests/timers: Add leap-a-day test from timetest suite
>   selftests/timers: Add leapcrash test from the timetest suite
>   selftests/timers: Add set-tai from the timetest suite
>   selftests/timers: Add set-2038 test from timetest suite
>   MAINTAINERS: Add selftests/timers to the timekeeping maintainance list
> 
>  MAINTAINERS                                        |   1 +
>  tools/testing/selftests/timers/Makefile            |  37 ++-
>  .../testing/selftests/timers/alarmtimer-suspend.c  | 186 ++++++++++++
>  tools/testing/selftests/timers/change_skew.c       | 107 +++++++
>  .../testing/selftests/timers/clocksource-switch.c  | 179 ++++++++++++
>  .../testing/selftests/timers/inconsistency-check.c | 207 +++++++++++++
>  tools/testing/selftests/timers/leap-a-day.c        | 323 +++++++++++++++++++++
>  tools/testing/selftests/timers/leapcrash.c         | 120 ++++++++
>  tools/testing/selftests/timers/mqueue-lat.c        | 124 ++++++++
>  tools/testing/selftests/timers/nanosleep.c         | 174 +++++++++++
>  tools/testing/selftests/timers/nsleep-lat.c        | 190 ++++++++++++
>  tools/testing/selftests/timers/posix_timers.c      |   9 +-
>  tools/testing/selftests/timers/raw_skew.c          | 154 ++++++++++
>  tools/testing/selftests/timers/set-2038.c          | 147 ++++++++++
>  tools/testing/selftests/timers/set-tai.c           |  79 +++++
>  tools/testing/selftests/timers/set-timer-lat.c     | 210 ++++++++++++++
>  tools/testing/selftests/timers/skew_consistency.c  |  89 ++++++
>  tools/testing/selftests/timers/threadtest.c        | 202 +++++++++++++
>  tools/testing/selftests/timers/valid-adjtimex.c    | 204 +++++++++++++
>  19 files changed, 2734 insertions(+), 8 deletions(-)
>  create mode 100644 tools/testing/selftests/timers/alarmtimer-suspend.c
>  create mode 100644 tools/testing/selftests/timers/change_skew.c
>  create mode 100644 tools/testing/selftests/timers/clocksource-switch.c
>  create mode 100644 tools/testing/selftests/timers/inconsistency-check.c
>  create mode 100644 tools/testing/selftests/timers/leap-a-day.c
>  create mode 100644 tools/testing/selftests/timers/leapcrash.c
>  create mode 100644 tools/testing/selftests/timers/mqueue-lat.c
>  create mode 100644 tools/testing/selftests/timers/nanosleep.c
>  create mode 100644 tools/testing/selftests/timers/nsleep-lat.c
>  create mode 100644 tools/testing/selftests/timers/raw_skew.c
>  create mode 100644 tools/testing/selftests/timers/set-2038.c
>  create mode 100644 tools/testing/selftests/timers/set-tai.c
>  create mode 100644 tools/testing/selftests/timers/set-timer-lat.c
>  create mode 100644 tools/testing/selftests/timers/skew_consistency.c
>  create mode 100644 tools/testing/selftests/timers/threadtest.c
>  create mode 100644 tools/testing/selftests/timers/valid-adjtimex.c
> 
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