[LTP] [PATCH 1/2] lib: multiply the timeout if detect slow kconfigsD

[Petr Vorel]

> Hi!
> > I did a quick grep that some ltp-aiodio tests set it to 1800 sec, which
> > only 8/91 occupation in the LTP testcases/, I'm not sure if it's worth
> > adding a new field for those few stress tests.

> > And with the previous method, the multiple 4 max_runtime for 1800s
> > is 2hours per test up limit, I can't imagine how long we will get eventually
> > in the whole test time.

> > Maybe another way is to create a separate function in a header
> > like aio_common.h (or in high-level dir) for handling that significantly
> > larger runtime tests.

> > BTW, we have TST_UNLIMITED_RUNTIME choice or, invoke
> > tst_set_max_runtime() in somehow.

> I stil think that misusing max_runtime, which is supposed to be upper
> bound for the actual test runtime was a mistake.

Do you want to separate timeout for setup() and for actual test run?
Which one would be prolonged in case of "slow" kernels? (e.g. this patch).

Or you want to fix -iN?

Also for docs purposes it might be useful to list long running tests.
Fortunately there are just few tests which calls tst_set_max_runtime()
for dynamically set timeout.

> Maybe we should have called the max_runtime a timeout and add runtime
> for tests that needs it. That way we would have timeout compromising of
> two parts, one would be the 30s that is used for all tests and second
> part from the tst_test structure. And then the sum of these two would be
> multiplied by the timeout multipliers. Then we would have a runtime,
> which would be used only by tests that call tst_remaining_runtime().

> The overall test timeout would be then:

> (default_30s_timeout + tst_test->timeout) * TIMEOUT_MUL + tst_test->runtime * RUNTIME_MUL

> What do you think?

Timeout is for setup function, right? e.g. for ioctl_sg01? If yes, timeout is
too generic, IMHO many people will think that it's a general test timeout.
I would think about general name.

The above formula should be written in the docs in the separate description and
this section should be linked in TIMEOUT_MUL and RUNTIME_MUL description [1].

Maybe part of library README.md [2], which itself should be also moved to sphinx
docs.

Kind regards,
Petr

[1] https://linux-test-project.readthedocs.io/en/latest/users/setup_tests.html#library-environment-variables
[2] https://github.com/linux-test-project/ltp/blob/master/lib/README.md