Fw: Re: ticket #3889

[Joel Sherrill]

On Sat, Mar 27, 2021, 3:52 PM zack_on_the_speed_chanel <
zack_on_the_speed_chanel at protonmail.ch> wrote:

>
> I found a part of the assembly that says that the path is not called.
>
> if ( ( flags & POSIX_CONDITION_VARIABLES_CLOCK_MONOTONIC ) != 0 ) {
>
> 40005594:   12 80 00 39     bne  40005678 <_POSIX_Condition_variables_Wait_support+0x118> <== NEVER TAKEN
>
> 40005598:   f4 27 bf e8     st  %i2, [ %fp + -24 ]
>
> So if i'm correct The BSP supports this fuction of CLOCK_Monotonic (because the assembly is archetcture specific)? Which means that there is a need for the test I assume?
>
> Also does leon= the same as  the bsp  erc32-sis (or the one in the tutorial)
>
>
Please read the original source to confirm but I think you're right but it
supports it but doesn't have a test.

The ERC32 what's the first space hardened sparc processor. The leon3 is a
later processor in the same family. Both use the same build of GCC and are
just different bsps. In fact both run on the same sis simulator. It's just
that a user starting today on a mission, is more likely to use the Leon3.
The leon3 also can support SMP

>
> Zack
>
>
> Sent with ProtonMail <https://protonmail.com> Secure Email.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Saturday, March 27, 2021 7:50 PM, Joel Sherrill <joel at rtems.org> wrote:
>
>
>
> On Sat, Mar 27, 2021 at 2:33 PM zack_on_the_speed_chanel <
> zack_on_the_speed_chanel at protonmail.ch> wrote:
>
>> Hello,
>> Last year I tried to do work and help to contribute to RTEMS. I didn't
>> get too far but now I think I now I have a better shot at it! I was able to
>> complete the BSP and tools build, and run the hello world examples.  I want
>> to work on small tickets first and work my way into the source code. The
>> ticket is asking for a test  clock_create with clock monotonic.  here is
>> the link for the ticket I'm referring to
>> https://devel.rtems.org/ticket/3889 .My thinking is to look for code
>> that does something similar. In the ticket it says that there is a test
>> with clock_realtime. I was on the discord and someone suggested me to
>> looking to the coverage tests. How come i don't see the function
>> clock_create when looking at the annotated assembly code?  Also I think the
>> test should be based on this
>> https://git.rtems.org/rtems/tree/testsuites/psxtests/psxtimer02/psxtimer.c
>>
>
>  That was me on Discord. :)
>
> Yep. psxtimer02 is a good test to start from since it is doing similar
> cases on a different clock.
>
> The coverage I was suggesting to look at is here:
>
> https://ftp.rtems.org/pub/rtems/people/joel/coverage/coverage-2021-02-28/
>
> Drill down to leon3 and posix and look at the timer methods (create,
> settime, gettime) for current coverage.
>
> But I warn you, it may or may not actually support the CLOCK_REALTIME and
> CLOCK_MONOTONIC as required here:
>
>
> https://pubs.opengroup.org/onlinepubs/9699919799/functions/timer_create.html
>
> So coverage may be high because the implementation of the posix methods
> themselves are missing something.
>
> Pull the thread a bit to see if the methods support the clock value in
> question. If so, we just need tests. If not, some code gets added to the
> timer manager and tests get added.
>
> --joel
>
>>
>> Thanks
>> Zack
>>
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>
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