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SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
copyrights:
- Copyright (C) 2021 embedded brains GmbH & Co. KG
enabled-by: RTEMS_SMP
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:
brief: |
Move worker to scheduler A.
code: |
SetScheduler( ctx->worker_id, SCHEDULER_A_ID, PRIO_HIGH );
description: null
test-prepare:
brief: |
Move worker to scheduler B.
code: |
SetScheduler( ctx->worker_id, SCHEDULER_B_ID, PRIO_NORMAL );
description: 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 );
WaitForNextTask( 1, ctx->worker_id );
description: null
test-teardown:
brief: |
Make sure the worker waits for the next event. Set the measured runtime.
Discard samples interrupted by a clock tick.
code: |
T_quiet_rsc( ctx->status, RTEMS_SUCCESSFUL );
WaitForNextTask( 1, ctx->worker_id );
*delta = ctx->end - ctx->begin;
return tic == toc;
description: null
text: |
Let U and V be two tasks with distinct home schedulers. Let :math:`B`
be a time point measured by U right before a call to
${../if/release:/name} which unblocks task V which is scheduled on
another processor. 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 on 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
|
