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score: Make EDF the default SMP scheduler

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The EDF SMP scheduler supports simple thread processor affinities
(see #3059) with a small run-time overhead. The current default SMP
scheduler lacks support for thread processor affinities at all. The EDF
SMP scheduler offers a good feature set for most applications. So, use
it by default. Run-time libraries like libgomp, MTAPI, work stealing
schedulers, language interpreters (e.g. Erlang virtual machine),
maintainence of per-processor data (e.g. Universal Memory Allocator
(UMA)), etc. use a one-to-one thread processor affinity for example.

Update #3063.
This commit is contained in:
Sebastian Huber
2017-07-06 15:59:43 +02:00
parent 4a1bdd3045
commit 21389c0613
1 changed files with 2 additions and 2 deletions
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4
cpukit/sapi/include/confdefs.h
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@@ -811,9 +811,9 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
#if defined(RTEMS_SMP) && CONFIGURE_MAXIMUM_PROCESSORS > 1
/**
* If no scheduler is specified in an SMP configuration, the
* priority scheduler is default.
* EDF scheduler is default.
*/
#define CONFIGURE_SCHEDULER_PRIORITY_SMP
#define CONFIGURE_SCHEDULER_EDF_SMP
#else
/**
* If no scheduler is specified in a uniprocessor configuration, the