SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
copyrights:
- Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
enabled-by: true
links:
- role: requirement-refinement
  uid: perf-runtime
- role: runtime-measurement-request
  uid: ../val/perf
non-functional-type: performance-runtime
params: {}
rationale: null
references: []
requirement-type: non-functional
test-body:
  brief: |
    Release the mutex.
  code: |
    ctx->begin = T_tick();
    ctx->status = rtems_semaphore_release( ctx->mutex_id );
  description: null
test-cleanup: null
test-prepare: null
test-setup:
  brief: |
    Let one task wait on the mutex.
  code: |
    ObtainMutex( ctx->mutex_id );
    Send( ctx, EVENT_OBTAIN | EVENT_OBTAIN_END | EVENT_RELEASE );
  description: null
test-teardown:
  brief: |
    Set the measured runtime.  Discard samples interrupted by a clock tick.
  code: |
    T_quiet_rsc( ctx->status, RTEMS_SUCCESSFUL );

    *delta = ctx->end - ctx->begin;

    return tic == toc;
  description: null
text: |
  Let U and V be two tasks with the same home scheduler.  Let :math:`B`
  be a time point measured by U right before a call to
  ${../if/release:/name} which unblocks task V which does preempt the
  caller.  Let :math:`E` be a time point measured by V right after the
  first context switch after :math:`B`.

  While the execution environment is ${.:/environment}, while the semaphore is
  a priority inheritance mutex, while exactly task V waits for the mutex,
  while the measurement sample is :math:`E - B`, when exactly
  ${../val/perf:/params/sample-count} samples are collected, the
  ${.:/limit-kind} shall be ${.:/limit-condition}.
type: requirement