> Polled vs interrupt console drivers?
I don't see how... With tasks spawned with RTEMS_DEFAULT_MODES and
CONFIGURE_MAXIMUM_PROCESSORS set to 1, Task 2 should not be allowed to run
until Task 1 completes - so the output of "Starting" ( in "task_begin" of
Task 2) should not be able to precede the output of "Computed" at the end
of Task1 - the relevant print should not have happened yet.
I can understand how console output can become garbled in tasks that are
running concurrently - but in this case, I would expect them to run in
sequence.
The only way for this
[TASK 0] Starting...
[TASK 0] Computed the correct floating point result.
[TASK 1] Starting...
[TASK 1] Computed the correct integer result.
[TASK 2] Starting...
[TASK 2] Computed the correct floating point result.
[TASK 3] Starting...
[TASK 3] Computed the correct integer result.
to turn into this
The expected result:
[TASK 0] Starting...
[TASK 1] Starting...
[TASK 2] Starting...
[TASK 3] Starting...
[TASK 0] Computed the correct floating point result.
[TASK 1] Computed the correct integer result.
[TASK 2] Computed the correct floating point result.
[TASK 3] Computed the correct integer result.
...is if indeed, the tasks are running concurrently with the ZynQ BSP.
So the question is:
Given the task spawning parameters ("RTEMS_DEFAULT_MODES") and
CONFIGURE_MAXIMUM_PROCESSORS set to 1, is it right to experience
timeslicing on the ZynQ ZC706?
Thanassis Tsiodras
Real-time Embedded Software Engineer
System, Software and Technology Department
ESTEC
Keplerlaan 1, PO Box 299
NL-2200 AG Noordwijk, The Netherlands
thanassis.tsiod...@esa.int | www.esa.int
T +31 71 565 5332
From: "Chris Johns" <chr...@rtems.org>
To: "Thanassis Tsiodras (external)" <thanassis.tsiod...@esa.int>
Cc: "Gedare Bloom" <ged...@rtems.org>, "rtems-us...@rtems.org"
<users@rtems.org>, "Fernando Domínguez Pousa" <fdpo...@gmv.com>
Date: 01/05/2020 09:46
Subject: Re: RTEMS tasks timesliced instead of running to
completion. TIMESLICE flag is not active!
On 1/5/20 5:08 pm, Thanassis Tsiodras (external) wrote:
> Note that this test (complete code in
>
https://gitrepos.estec.esa.int/ttsiodras/RTEMS-build-workflows/-/tree/master/OAR
)
> creates the proper - non-interleaved - output when compiled and executed
> for the GR712RC and GR740 boards... but creates the interleaved output
> in a ZynQ ZC706 board.
Polled vs interrupt console drivers?
Chris
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