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Commit a6dd24f8 authored by Ingo Molnar's avatar Ingo Molnar Committed by Thomas Gleixner
Browse files

ftrace: sysprof-plugin, add self-tests 



Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 56a08bdc

kernel/trace/trace.h

+4 −0
Original line number Diff line number Diff line
@@ -280,6 +280,10 @@ extern int trace_selftest_startup_wakeup(struct tracer *trace, 
extern int trace_selftest_startup_sched_switch(struct tracer *trace,

					       struct trace_array *tr);

#endif

#ifdef CONFIG_SYSPROF_TRACER

extern int trace_selftest_startup_sysprof(struct tracer *trace,

					       struct trace_array *tr);

#endif

#endif /* CONFIG_FTRACE_STARTUP_TEST */



extern void *head_page(struct trace_array_cpu *data);

kernel/trace/trace_selftest.c

+28 −0
Original line number Diff line number Diff line
@@ -537,3 +537,31 @@ trace_selftest_startup_sched_switch(struct tracer *trace, struct trace_array *tr 
	return ret;

}

#endif /* CONFIG_CONTEXT_SWITCH_TRACER */



#ifdef CONFIG_SYSPROF_TRACER

int

trace_selftest_startup_sysprof(struct tracer *trace, struct trace_array *tr)

{

	unsigned long count;

	int ret;



	/* start the tracing */

	tr->ctrl = 1;

	trace->init(tr);

	/* Sleep for a 1/10 of a second */

	msleep(100);

	/* stop the tracing. */

	tr->ctrl = 0;

	trace->ctrl_update(tr);

	/* check the trace buffer */

	ret = trace_test_buffer(tr, &count);

	trace->reset(tr);



	if (!ret && !count) {

		printk(KERN_CONT ".. no entries found ..");

		ret = -1;

	}



	return ret;

}

#endif /* CONFIG_SYSPROF_TRACER */

kernel/trace/trace_sysprof.c

+3 −3
Original line number Diff line number Diff line
@@ -126,7 +126,7 @@ static void start_stack_timers(void) 
	for_each_online_cpu(cpu) {

		set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));

		start_stack_timer(cpu);

		printk("started timer on cpu%d\n", cpu);

		printk(KERN_INFO "started sysprof timer on cpu%d\n", cpu);

	}

	set_cpus_allowed_ptr(current, &saved_mask);

}
@@ -136,7 +136,7 @@ static void stop_stack_timer(int cpu) 
	struct hrtimer *hrtimer = &per_cpu(stack_trace_hrtimer, cpu);



	hrtimer_cancel(hrtimer);

	printk("cancelled timer on cpu%d\n", cpu);

	printk(KERN_INFO "cancelled sysprof timer on cpu%d\n", cpu);

}



static void stop_stack_timers(void)
@@ -200,7 +200,7 @@ static struct tracer stack_trace __read_mostly = 
	.reset		= stack_trace_reset,

	.ctrl_update	= stack_trace_ctrl_update,

#ifdef CONFIG_FTRACE_SELFTEST

	.selftest    = trace_selftest_startup_stack,

	.selftest    = trace_selftest_startup_sysprof,

#endif

};