[smart] add CPU/thread usage tracing config (#8947)

* [smart] add CPU usage tracing config

This patch introduces following features:

- Added CPU usage tracing functionality, enabled by default, for
  applications like 'top'
- update time as smart independent

Signed-off-by: Shell <smokewood@qq.com>

* fixup: add ump idle thread

---------

Signed-off-by: Shell <smokewood@qq.com>

src/Kconfig

@@ -183,6 +183,14 @@ if RT_USING_TIMER_SOFT
         default 512
 endif
 
+config RT_USING_CPU_USAGE_TRACER
+    select RT_USING_HOOK
+    bool "Enable cpu usage tracing"
+    help
+        Enable cpu usage tracer for application like top.
+    default y if RT_USING_SMART
+    default n
+
 menu "kservice optimization"
     config RT_USING_TINY_FFS
         bool "Enable kservice to use tiny finding first bit set method"

src/clock.c

@@ -79,6 +79,36 @@ void rt_tick_set(rt_tick_t tick)
     rt_atomic_store(&(rt_tick), tick);
 }
 
+#ifdef RT_USING_CPU_USAGE_TRACER
+static void _update_process_times(void)
+{
+    struct rt_thread *thread = rt_thread_self();
+    struct rt_cpu *pcpu = rt_cpu_self();
+
+    if (!LWP_IS_USER_MODE(thread))
+    {
+        thread->user_time += 1;
+        pcpu->cpu_stat.user += 1;
+    }
+    else
+    {
+        thread->system_time += 1;
+        if (thread == pcpu->idle_thread)
+        {
+            pcpu->cpu_stat.idle += 1;
+        }
+        else
+        {
+            pcpu->cpu_stat.system += 1;
+        }
+    }
+}
+
+#else
+
+#define _update_process_times()
+#endif /* RT_USING_CPU_USAGE_TRACER */
+
 /**
  * @brief    This function will notify kernel there is one tick passed.
  *           Normally, this function is invoked by clock ISR.
@@ -88,6 +118,10 @@ void rt_tick_increase(void)
     RT_ASSERT(rt_interrupt_get_nest() > 0);
 
     RT_OBJECT_HOOK_CALL(rt_tick_hook, ());
+
+    /* tracing cpu usage */
+    _update_process_times();
+
     /* increase the global tick */
 #ifdef RT_USING_SMP
     /* get percpu and increase the tick */

src/idle.c

@@ -346,9 +346,11 @@ void rt_thread_idle_init(void)
                 32);
 #ifdef RT_USING_SMP
         rt_thread_control(&idle_thread[i], RT_THREAD_CTRL_BIND_CPU, (void*)i);
-
-        rt_cpu_index(i)->idle_thread = &idle_thread[i];
 #endif /* RT_USING_SMP */
+
+        /* update */
+        rt_cpu_index(i)->idle_thread = &idle_thread[i];
+
         /* startup */
         rt_thread_startup(&idle_thread[i]);
     }