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[kernel][thread] Add some tracing when DEBUG_THREAD_CONTEXT_SWITCH is set

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Change-Id: I65118c52155a6ef55dfdbf2c43107c7439fae38b

Conflicts:
	kernel/thread.c
This commit is contained in:
Arve Hjønnevåg
2015-01-23 20:01:14 -08:00
committed by Travis Geiselbrecht
parent 794d304599
commit 63000f0cb3
1 changed files with 16 additions and 1 deletions
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17
kernel/thread.c
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@@ -533,11 +533,19 @@ void thread_resched(void)
if (!thread_is_real_time_or_idle(oldthread)) {
/* if we're switching from a non real time to a real time, cancel
* the preemption timer. */
#ifdef DEBUG_THREAD_CONTEXT_SWITCH
dprintf(ALWAYS, "arch_context_switch: stop preempt, cpu %d, old %p (%s), new %p (%s)\n",
cpu, oldthread, oldthread->name, newthread, newthread->name);
#endif
timer_cancel(&preempt_timer[cpu]);
}
} else if (thread_is_real_time_or_idle(oldthread)) {
/* if we're switching from a real time (or idle thread) to a regular one,
* set up a periodic timer to run our preemption tick. */
#ifdef DEBUG_THREAD_CONTEXT_SWITCH
dprintf(ALWAYS, "arch_context_switch: start preempt, cpu %d, old %p (%s), new %p (%s)\n",
cpu, oldthread, oldthread->name, newthread, newthread->name);
#endif
timer_set_periodic(&preempt_timer[cpu], 10, (timer_callback)thread_timer_tick, NULL);
}
#endif
@@ -547,7 +555,14 @@ void thread_resched(void)
/* do the switch */
set_current_thread(newthread);
//printf("c %u %p (%s) -> %p (%s)\n", cpu, oldthread, oldthread->name, newthread, newthread->name);
#ifdef DEBUG_THREAD_CONTEXT_SWITCH
dprintf(ALWAYS, "arch_context_switch: cpu %d, old %p (%s, pri %d, flags 0x%x), new %p (%s, pri %d, flags 0x%x)\n",
cpu, oldthread, oldthread->name, oldthread->priority,
oldthread->flags, newthread, newthread->name,
newthread->priority, newthread->flags);
#endif
arch_context_switch(oldthread, newthread);
}