[PATCH 1/3] smpschedaffinity02: Change semaphore attributes.

Jennifer Averett Jennifer.Averett at OARcorp.com
Wed Nov 12 16:17:53 UTC 2014



> -----Original Message-----
> From: Sebastian Huber [mailto:sebastian.huber at embedded-brains.de]
> Sent: Wednesday, November 12, 2014 9:16 AM
> To: Jennifer Averett; rtems-devel at rtems.org
> Subject: Re: [PATCH 1/3] smpschedaffinity02: Change semaphore attributes.
> 
> On 12/11/14 15:48, Jennifer Averett wrote:
> > Change semaphore attributes to prevent semaphore from being locked
> and
> > never released upon a context switch.
> > ---
> >   testsuites/smptests/smpschedaffinity02/init.c | 7 ++-----
> >   1 file changed, 2 insertions(+), 5 deletions(-)
> >
> > diff --git a/testsuites/smptests/smpschedaffinity02/init.c
> > b/testsuites/smptests/smpschedaffinity02/init.c
> > index a3e0ddf..43efc99 100644
> > --- a/testsuites/smptests/smpschedaffinity02/init.c
> > +++ b/testsuites/smptests/smpschedaffinity02/init.c
> > @@ -140,11 +140,8 @@ static void test(void)
> >     sc = rtems_semaphore_create(
> >       rtems_build_name('S', 'E', 'M', '0'),
> >       1,
> > -    RTEMS_LOCAL                   |
> > -    RTEMS_SIMPLE_BINARY_SEMAPHORE |
> > -    RTEMS_NO_INHERIT_PRIORITY     |
> > -    RTEMS_NO_PRIORITY_CEILING     |
> > -    RTEMS_FIFO,
> > +    RTEMS_BINARY_SEMAPHORE |
> > +    RTEMS_MULTIPROCESSOR_RESOURCE_SHARING,
> >       0,
> >       &task_sem
> >     );
> 
> Why do you use RTEMS_MULTIPROCESSOR_RESOURCE_SHARING here?

It just needed to use a binary instead of a simple binary.  I think it could also
have been resolved with the following settings:

RTEMS_BINARY_SEMAPHORE | RTEMS_PRIORITY | RTEMS_INHERIT_PRIORITY

> --
> Sebastian Huber, embedded brains GmbH
> 
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone   : +49 89 189 47 41-16
> Fax     : +49 89 189 47 41-09
> E-Mail  : sebastian.huber at embedded-brains.de
> PGP     : Public key available on request.
> 
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.



More information about the devel mailing list