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55 lines
1.2 KiB
Markdown
55 lines
1.2 KiB
Markdown
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Round Robing Scheduling Test
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========================
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This application is a simple test case for round-robin scheduling.
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Two threads are started with the same priority.
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The first thread is a busy loop and is started first.
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The second thread unlocks a mutex allowing the main thread to continue and exit.
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Without Round Robin scheduling the busy loop thread would run indefinitely,
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with round-robin in eventually getting de-scheduled allowing the main thread to run and exit.
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Usage
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=====
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By default `sched_round_robin` is included:
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`make tests/sys_sched_round_robin flash term`
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```
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...Board Initialisation...
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Help: Press s to start test, r to print it is ready
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s
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START
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main(): This is RIOT! (Version: ...)
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starting threads
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double locking mutex
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mutex_thread yield
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bad thread looping
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unlock mutex
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[SUCCESS]
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```
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It can be excluded from the build by setting the command-line argument `NORR=1`:
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`NORR=1 make tests/sys_sched_round_robin flash term`
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```
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...Board Initialisation...
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Help: Press s to start test, r to print it is ready
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s
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START
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main(): This is RIOT! (Version: ...)
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starting threads
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double locking mutex
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mutex_thread yield
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bad thread looping
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```
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This will loop endlessly as the bad thread does not release the CPU,
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`make test` will timeout in that case.
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