diff options
Diffstat (limited to 'c-user/configuring_a_system.rst')
| -rw-r--r-- | c-user/configuring_a_system.rst | 42 |
1 files changed, 25 insertions, 17 deletions
diff --git a/c-user/configuring_a_system.rst b/c-user/configuring_a_system.rst index 585014c..01a2e2e 100644 --- a/c-user/configuring_a_system.rst +++ b/c-user/configuring_a_system.rst @@ -4040,6 +4040,10 @@ CONFIGURATION: - ``RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL``. + It is possible to add/remove processors to/from scheduler instances at + run-time, see :ref:`rtems_scheduler_add_processor` and + :ref:`rtems_scheduler_remove_processor`. + ERRORS: In case one of the scheduler indices in``CONFIGURE_SMP_SCHEDULER_ASSIGNMENTS`` is invalid a link-time error will @@ -4091,32 +4095,36 @@ EXAMPLE: #define CONFIGURE_SMP_MAXIMUM_PROCESSORS 8 #define CONFIGURE_MAXIMUM_PRIORITY 255 + /* Make the scheduler algorithm available */ #define CONFIGURE_SCHEDULER_PRIORITY_SMP #include <rtems/scheduler.h> + /* Create contexts for the two scheduler instances */ RTEMS_SCHEDULER_CONTEXT_PRIORITY_SMP(io, CONFIGURE_MAXIMUM_PRIORITY + 1); RTEMS_SCHEDULER_CONTEXT_PRIORITY_SMP(work, CONFIGURE_MAXIMUM_PRIORITY + 1); + /* Define the scheduler table */ #define CONFIGURE_SCHEDULER_CONTROLS \\ - RTEMS_SCHEDULER_CONTROL_PRIORITY_SMP( \ - io, \ - rtems_build_name('I', 'O', ' ', ' ') \ - ), \ - RTEMS_SCHEDULER_CONTROL_PRIORITY_SMP( \ - work, \ - rtems_build_name('W', 'O', 'R', 'K') \ - ) - /* Define the processor to scheduler assignments */ + RTEMS_SCHEDULER_CONTROL_PRIORITY_SMP( \ + io, \ + rtems_build_name('I', 'O', ' ', ' ') \ + ), \ + RTEMS_SCHEDULER_CONTROL_PRIORITY_SMP( \ + work, \ + rtems_build_name('W', 'O', 'R', 'K') \ + ) + + /* Define the initial processor to scheduler assignments */ #define CONFIGURE_SMP_SCHEDULER_ASSIGNMENTS \ - RTEMS_SCHEDULER_ASSIGN(0, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_MANDATORY), \ - RTEMS_SCHEDULER_ASSIGN_NO_SCHEDULER, \ - RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_MANDATORY), \ - RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_MANDATORY), \ - RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL), \ - RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL), \ - RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL), \ - RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL) + RTEMS_SCHEDULER_ASSIGN(0, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_MANDATORY), \ + RTEMS_SCHEDULER_ASSIGN_NO_SCHEDULER, \ + RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_MANDATORY), \ + RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_MANDATORY), \ + RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL), \ + RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL), \ + RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL), \ + RTEMS_SCHEDULER_ASSIGN(1, RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL) .. COMMENT: === SMP Specific Configuration Parameters === |