LTP realtime tests

LTP realtime tests

[Petr Vorel]

Hi RT folks,

looking into LTP realtime tests (testcases/realtime/ [1]),
the code certainly deserves cleanup.

Looking at [2], it does not mention these tests at all.
Can anyone comment on relevance of these tests to current RT?
Does anyone use these tests?

Thanks for feedback.

Kind regards,
Petr

[1] https://github.com/linux-test-project/ltp/tree/master/testcases/realtime
[2] https://elinux.org/Realtime_Testing_Best_Practices#Test_programs

Re: [LTP] LTP realtime tests

[Joerg Vehlow]

Hi Petr,

we are running these tests and from what I've seen the quality is very poor.
We had to make changes to a lot of them to make them pass reliably:
most of the tests: Missing checks of return value for pthread function 
and resulting deadlock
prio-wake and prio-preempt: Bound to a single cpu core
sched_football: Needs a sleep to run reliable (I send a mail some time 
ago to this mailing list
regarding the validity of the test, which got forwarded to lkml by 
cyril, but no reply)

Some tests do not return the correct result e.g.:
testpi-5, testpi-6, sched_jitter, gtod_latency

I haven't really looked into most of these tests.

Jörg

Am 05.12.2019 um 14:50 schrieb Petr Vorel:
> Hi RT folks,
>
> looking into LTP realtime tests (testcases/realtime/ [1]),
> the code certainly deserves cleanup.
>
> Looking at [2], it does not mention these tests at all.
> Can anyone comment on relevance of these tests to current RT?
> Does anyone use these tests?
>
> Thanks for feedback.
>
> Kind regards,
> Petr
>
> [1] https://github.com/linux-test-project/ltp/tree/master/testcases/realtime
> [2] https://elinux.org/Realtime_Testing_Best_Practices#Test_programs
>

Re: [LTP] LTP realtime tests

[Grygorii Strashko]

CC:

On 06/12/2019 08:13, Joerg Vehlow wrote:
> Hi Petr,
> 
> we are running these tests and from what I've seen the quality is very poor.
> We had to make changes to a lot of them to make them pass reliably:
> most of the tests: Missing checks of return value for pthread function and resulting deadlock
> prio-wake and prio-preempt: Bound to a single cpu core
> sched_football: Needs a sleep to run reliable (I send a mail some time ago to this mailing list
> regarding the validity of the test, which got forwarded to lkml by cyril, but no reply)
> 
> Some tests do not return the correct result e.g.:
> testpi-5, testpi-6, sched_jitter, gtod_latency
> 
> I haven't really looked into most of these tests.
> 
> Jörg
> 
> Am 05.12.2019 um 14:50 schrieb Petr Vorel:
>> Hi RT folks,
>>
>> looking into LTP realtime tests (testcases/realtime/ [1]),
>> the code certainly deserves cleanup.
>>
>> Looking at [2], it does not mention these tests at all.
>> Can anyone comment on relevance of these tests to current RT?
>> Does anyone use these tests?
>>
>> Thanks for feedback.
>>
>> Kind regards,
>> Petr
>>
>> [1] https://github.com/linux-test-project/ltp/tree/master/testcases/realtime
>> [2] https://elinux.org/Realtime_Testing_Best_Practices#Test_programs
>>
> 

-- 
Best regards,
grygorii