arch/all-pc/exec/exec_idle.c

   1 /*
   2     Copyright © 2015-2018, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #define DEBUG 0
   7
   8 #include <proto/exec.h>
   9
  10 #define __AROS_KERNEL__
  11
  12 #include "exec_intern.h"
  13
  14 #include "etask.h"
  15
  16 void IdleTask(struct ExecBase *SysBase)
  17 {
  18     D(
  19         struct Task *thisTask = FindTask(NULL);
  20         struct IntETask *taskIntEtask;
  21         int cpunum = KrnGetCPUNumber();
  22         ULONG lastcount = 0, current;
  23
  24         bug("[IDLE:%03d] %s task started\n", cpunum, thisTask->tc_Node.ln_Name);
  25     )
  26
  27     do
  28     {
  29         /* forever */
  30
  31         // Call sleep function (which enables interrupts, sleeps CPU until interrupt comes and then returns)
  32         krnSysCallChangePMState(0x90);
  33
  34         // After SLEEP_FUNCTION returned nothing was rescheduled. Reschedule now...
  35         Reschedule();
  36
  37         D(
  38             if ((taskIntEtask = GetIntETask(thisTask)) != NULL)
  39             {
  40                 current = taskIntEtask->iet_CpuTime.tv_sec;
  41                 if (current != lastcount)
  42                 {
  43                     lastcount = current;
  44                     bug("[IDLE:%03d] CPU has idled for %d seconds\n", cpunum, lastcount);
  45                 }
  46             }
  47             else
  48             {
  49                 bug("[IDLE:%03d] Failed to get IntETask\n", cpunum);
  50             }
  51         )
  52     } while(1);
  53 }