Function rt_thread_get_usage

src/kservice.c:556–582

* @brief Get thread usage percentage relative to total system CPU time * * This function calculates the CPU usage percentage of a specific thread * relative to the total CPU time consumed by all threads in the system. * * @param thread Pointer to the thread object. Must not be NULL. * * @return The CPU usage percentage as an integer value (0-100). * Returns 0 if total system time i

 * @note If thread is NULL, an assertion will be triggered in debug builds.
 */
rt_uint8_t rt_thread_get_usage(rt_thread_t thread)
{
    rt_ubase_t thread_time;
    rt_ubase_t total_time = 0U;
    int i;
    rt_cpu_t pcpu;

    RT_ASSERT(thread != RT_NULL);

    thread_time = thread->user_time + thread->system_time;

    /* Calculate total system time by summing all CPUs' time */
    for (i = 0; i < RT_CPUS_NR; i++)
    {
        pcpu = rt_cpu_index(i);
        total_time += pcpu->cpu_stat.user + pcpu->cpu_stat.system + pcpu->cpu_stat.idle;
    }

    if (total_time > 0U)
    {
        /* Calculate thread usage percentage: (thread_time * 100) / total_time */
        rt_ubase_t usage = (thread_time * 100U) / total_time;
        return (rt_uint8_t)(usage > 100U ? 100U : usage);
    }

    return 0U;
}
#endif /* RT_USING_CPU_USAGE_TRACER */

#if defined(RT_USING_LIBC) && defined(RT_USING_FINSH)