Thread Scheduling
| Type | Level | UID | REFS | Title | Statement | Rationale | Comment |
|---|---|---|---|---|---|---|---|
| TEXT | SPDX-License-Identifier: Apache-2.0 |
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| SECTION | 1 | Thread Scheduling |
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| REQUIREMENT | 1.1 | ZEP-SRS-2-1 | Support operation on more than one CPU |
The Zephyr RTOS shall support operation on more than one physical CPU sharing the same kernel state. |
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| REQUIREMENT | 1.2 | ZEP-SRS-2-2 | Running threads on specific CPUs |
The Zephyr RTOS shall provide an interface for running threads on specific sets of CPUs ( default is 1 CPU). |
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| REQUIREMENT | 1.3 | ZEP-SRS-2-3 | Exclusion between physical CPUs |
The Zephyr RTOS shall provide an interface for mutual exclusion between multiple physical CPUs. |
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| SECTION | 2 | Thread Scheduling |
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| REQUIREMENT | 2.1 | ZEP-SRS-2-4 | Parents: | Scheduling a thread based on an event |
The Zephyr RTOS shall provide an interface to schedule a thread based on an event. |
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| REQUIREMENT | 2.2 | ZEP-SRS-2-5 | Deadline Scheduling Priorities |
The Zephyr RTOS shall organize running threads by earliest deadline first priority. |
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| REQUIREMENT | 2.3 | ZEP-SRS-2-6 | Work Queue utility capable of running preemptible work items |
The Zephyr RTOS shall provide a thread-pooled work queue utility capable of running preemptible work items with specific scheduler priorities. |
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| REQUIREMENT | 2.4 | ZEP-SRS-2-7 | Run user supplied functions in-order in a separate thread(s) |
The Zephyr RTOS shall provide an interface for running user-supplied functions. |
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| REQUIREMENT | 2.5 | ZEP-SRS-2-8 | Organize running threads into a fixed list |
The Zephyr RTOS shall organize running threads into a fixed list of numeric priorities. |
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| REQUIREMENT | 2.6 | ZEP-SRS-2-9 | Preemption support |
The Zephyr RTOS shall support preemption of a running thread by a higher priority thread. |
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| REQUIREMENT | 2.7 | ZEP-SRS-2-10 | Un-preemptible thread priorities |
The Zephyr RTOS shall support thread priorities which cannot be preempted by other user threads. |
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| REQUIREMENT | 2.8 | ZEP-SRS-2-11 | Time sharing of CPU resources |
The Zephyr RTOS shall support time sharing of CPU resources among threads of the same priority. |