SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
copyrights:
- Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
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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 barrier.
  code: |
    uint32_t count;

    ctx->begin = T_tick();
    ctx->status = rtems_barrier_release( ctx->barrier_id, &count );
  description: null
test-cleanup:
  brief: |
    Delete the barrier and the worker.
  code: |
    rtems_status_code sc;

    DeleteTask( ctx->worker_id );

    sc = rtems_barrier_delete( ctx->barrier_id );
    T_rsc_success( sc );

    RestoreRunnerPriority();
  description: null
test-prepare:
  brief: |
    Create a manual release barrier.  Create and start a worker task.
  code: |
    rtems_status_code sc;

    sc = rtems_barrier_create(
      OBJECT_NAME,
      RTEMS_BARRIER_MANUAL_RELEASE,
      0,
      &ctx->barrier_id
    );
    T_rsc_success( sc );

    SetSelfPriority( PRIO_NORMAL );
    ctx->worker_id = CreateTask( "WORK", PRIO_HIGH );
    StartTask( ctx->worker_id, BarrierWaitWorker, ctx );
  description: null
test-setup: null
test-teardown:
  brief: |
    Set the measured runtime.  Discard samples interrupted by a clock tick.
  code: |
    T_quiet_rsc_success( ctx->status );

    *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 preempts the caller.  Let :math:`E` be a time
  point measured by V right after a call to ${../if/wait:/name} returns
  successfully due to the ${../if/release:/name} call associated with
  :math:`B`.

  While the execution environment is ${.:/environment}, while the barrier is a
  manual release barrier, 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