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Merge pull request #5292 from OlegHahm/thread_prio_doc_enhancement

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doc: a note about creating threads w/ same prio
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Oleg Hahm 2016-04-11 15:35:15 +02:00
commit b5050539a2
1 changed files with 11 additions and 0 deletions
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11
core/include/thread.h
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@ -204,6 +204,17 @@ struct _thread {
* The lowest possible priority is *THREAD_PRIORITY_IDLE - 1*. The value is depending
* on the platforms architecture, e.g. 30 in 32-bit systems, 14 in 16-bit systems.
*
* @note Assigning the same priority to two or more threads is usually not a
* good idea. A thread in RIOT may run until it yields (@ref
* thread_yield) or another thread with higher priority is runnable (@ref
* STATUS_ON_RUNQUEUE) again. Having multiple threads with the same
* priority may make it difficult to determine when which of them gets
* scheduled and how much CPU time they will get. In most applications,
* the number of threads in application is significantly smaller than the
* number of available priorities, so assigning distinct priorities per
* thread should not be a problem. Only assign the same priority to
* multiple threads if you know what you are doing!
*
*
* In addition to the priority, the *flags* argument can be used to alter the
* newly created threads behavior after creation. The following flags are available: