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Diffstat (limited to 'kernel/trace/trace_selftest.c')
-rw-r--r--kernel/trace/trace_selftest.c102
1 files changed, 56 insertions, 46 deletions
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index a7329b7902f..5ef60499dc8 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -65,7 +65,7 @@ static int trace_test_buffer(struct trace_buffer *buf, unsigned long *count)
/* Don't allow flipping of max traces now */
local_irq_save(flags);
- arch_spin_lock(&ftrace_max_lock);
+ arch_spin_lock(&buf->tr->max_lock);
cnt = ring_buffer_entries(buf->buffer);
@@ -83,7 +83,7 @@ static int trace_test_buffer(struct trace_buffer *buf, unsigned long *count)
break;
}
tracing_on();
- arch_spin_unlock(&ftrace_max_lock);
+ arch_spin_unlock(&buf->tr->max_lock);
local_irq_restore(flags);
if (count)
@@ -161,11 +161,6 @@ static struct ftrace_ops test_probe3 = {
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
-static struct ftrace_ops test_global = {
- .func = trace_selftest_test_global_func,
- .flags = FTRACE_OPS_FL_GLOBAL | FTRACE_OPS_FL_RECURSION_SAFE,
-};
-
static void print_counts(void)
{
printk("(%d %d %d %d %d) ",
@@ -185,7 +180,7 @@ static void reset_counts(void)
trace_selftest_test_dyn_cnt = 0;
}
-static int trace_selftest_ops(int cnt)
+static int trace_selftest_ops(struct trace_array *tr, int cnt)
{
int save_ftrace_enabled = ftrace_enabled;
struct ftrace_ops *dyn_ops;
@@ -220,7 +215,11 @@ static int trace_selftest_ops(int cnt)
register_ftrace_function(&test_probe1);
register_ftrace_function(&test_probe2);
register_ftrace_function(&test_probe3);
- register_ftrace_function(&test_global);
+ /* First time we are running with main function */
+ if (cnt > 1) {
+ ftrace_init_array_ops(tr, trace_selftest_test_global_func);
+ register_ftrace_function(tr->ops);
+ }
DYN_FTRACE_TEST_NAME();
@@ -232,8 +231,10 @@ static int trace_selftest_ops(int cnt)
goto out;
if (trace_selftest_test_probe3_cnt != 1)
goto out;
- if (trace_selftest_test_global_cnt == 0)
- goto out;
+ if (cnt > 1) {
+ if (trace_selftest_test_global_cnt == 0)
+ goto out;
+ }
DYN_FTRACE_TEST_NAME2();
@@ -269,8 +270,10 @@ static int trace_selftest_ops(int cnt)
goto out_free;
if (trace_selftest_test_probe3_cnt != 3)
goto out_free;
- if (trace_selftest_test_global_cnt == 0)
- goto out;
+ if (cnt > 1) {
+ if (trace_selftest_test_global_cnt == 0)
+ goto out;
+ }
if (trace_selftest_test_dyn_cnt == 0)
goto out_free;
@@ -295,7 +298,9 @@ static int trace_selftest_ops(int cnt)
unregister_ftrace_function(&test_probe1);
unregister_ftrace_function(&test_probe2);
unregister_ftrace_function(&test_probe3);
- unregister_ftrace_function(&test_global);
+ if (cnt > 1)
+ unregister_ftrace_function(tr->ops);
+ ftrace_reset_array_ops(tr);
/* Make sure everything is off */
reset_counts();
@@ -315,9 +320,9 @@ static int trace_selftest_ops(int cnt)
}
/* Test dynamic code modification and ftrace filters */
-int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
- struct trace_array *tr,
- int (*func)(void))
+static int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
+ struct trace_array *tr,
+ int (*func)(void))
{
int save_ftrace_enabled = ftrace_enabled;
unsigned long count;
@@ -388,7 +393,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
}
/* Test the ops with global tracing running */
- ret = trace_selftest_ops(1);
+ ret = trace_selftest_ops(tr, 1);
trace->reset(tr);
out:
@@ -399,7 +404,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
/* Test the ops with global tracing off */
if (!ret)
- ret = trace_selftest_ops(2);
+ ret = trace_selftest_ops(tr, 2);
return ret;
}
@@ -802,7 +807,7 @@ out:
int
trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
{
- unsigned long save_max = tracing_max_latency;
+ unsigned long save_max = tr->max_latency;
unsigned long count;
int ret;
@@ -814,7 +819,7 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
}
/* reset the max latency */
- tracing_max_latency = 0;
+ tr->max_latency = 0;
/* disable interrupts for a bit */
local_irq_disable();
udelay(100);
@@ -841,7 +846,7 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
ret = -1;
}
- tracing_max_latency = save_max;
+ tr->max_latency = save_max;
return ret;
}
@@ -851,7 +856,7 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
int
trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
{
- unsigned long save_max = tracing_max_latency;
+ unsigned long save_max = tr->max_latency;
unsigned long count;
int ret;
@@ -876,7 +881,7 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
}
/* reset the max latency */
- tracing_max_latency = 0;
+ tr->max_latency = 0;
/* disable preemption for a bit */
preempt_disable();
udelay(100);
@@ -903,7 +908,7 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
ret = -1;
}
- tracing_max_latency = save_max;
+ tr->max_latency = save_max;
return ret;
}
@@ -913,7 +918,7 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
int
trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *tr)
{
- unsigned long save_max = tracing_max_latency;
+ unsigned long save_max = tr->max_latency;
unsigned long count;
int ret;
@@ -938,7 +943,7 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
}
/* reset the max latency */
- tracing_max_latency = 0;
+ tr->max_latency = 0;
/* disable preemption and interrupts for a bit */
preempt_disable();
@@ -973,7 +978,7 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
}
/* do the test by disabling interrupts first this time */
- tracing_max_latency = 0;
+ tr->max_latency = 0;
tracing_start();
trace->start(tr);
@@ -1004,7 +1009,7 @@ out:
tracing_start();
out_no_start:
trace->reset(tr);
- tracing_max_latency = save_max;
+ tr->max_latency = save_max;
return ret;
}
@@ -1022,11 +1027,16 @@ trace_selftest_startup_nop(struct tracer *trace, struct trace_array *tr)
#ifdef CONFIG_SCHED_TRACER
static int trace_wakeup_test_thread(void *data)
{
- /* Make this a RT thread, doesn't need to be too high */
- static const struct sched_param param = { .sched_priority = 5 };
+ /* Make this a -deadline thread */
+ static const struct sched_attr attr = {
+ .sched_policy = SCHED_DEADLINE,
+ .sched_runtime = 100000ULL,
+ .sched_deadline = 10000000ULL,
+ .sched_period = 10000000ULL
+ };
struct completion *x = data;
- sched_setscheduler(current, SCHED_FIFO, &param);
+ sched_setattr(current, &attr);
/* Make it know we have a new prio */
complete(x);
@@ -1040,8 +1050,8 @@ static int trace_wakeup_test_thread(void *data)
/* we are awake, now wait to disappear */
while (!kthread_should_stop()) {
/*
- * This is an RT task, do short sleeps to let
- * others run.
+ * This will likely be the system top priority
+ * task, do short sleeps to let others run.
*/
msleep(100);
}
@@ -1052,23 +1062,23 @@ static int trace_wakeup_test_thread(void *data)
int
trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
{
- unsigned long save_max = tracing_max_latency;
+ unsigned long save_max = tr->max_latency;
struct task_struct *p;
- struct completion isrt;
+ struct completion is_ready;
unsigned long count;
int ret;
- init_completion(&isrt);
+ init_completion(&is_ready);
- /* create a high prio thread */
- p = kthread_run(trace_wakeup_test_thread, &isrt, "ftrace-test");
+ /* create a -deadline thread */
+ p = kthread_run(trace_wakeup_test_thread, &is_ready, "ftrace-test");
if (IS_ERR(p)) {
printk(KERN_CONT "Failed to create ftrace wakeup test thread ");
return -1;
}
- /* make sure the thread is running at an RT prio */
- wait_for_completion(&isrt);
+ /* make sure the thread is running at -deadline policy */
+ wait_for_completion(&is_ready);
/* start the tracing */
ret = tracer_init(trace, tr);
@@ -1078,23 +1088,23 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
}
/* reset the max latency */
- tracing_max_latency = 0;
+ tr->max_latency = 0;
while (p->on_rq) {
/*
- * Sleep to make sure the RT thread is asleep too.
+ * Sleep to make sure the -deadline thread is asleep too.
* On virtual machines we can't rely on timings,
* but we want to make sure this test still works.
*/
msleep(100);
}
- init_completion(&isrt);
+ init_completion(&is_ready);
wake_up_process(p);
/* Wait for the task to wake up */
- wait_for_completion(&isrt);
+ wait_for_completion(&is_ready);
/* stop the tracing. */
tracing_stop();
@@ -1108,7 +1118,7 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
trace->reset(tr);
tracing_start();
- tracing_max_latency = save_max;
+ tr->max_latency = save_max;
/* kill the thread */
kthread_stop(p);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 12:55:15 +0000