static bool ftrace_dump_at_shutdown;
module_param(ftrace_dump_at_shutdown, bool, 0444);
+static int verbose_sleep_frequency;
+module_param(verbose_sleep_frequency, int, 0444);
+
+static int verbose_sleep_duration = 1;
+module_param(verbose_sleep_duration, int, 0444);
+
static char *torture_type;
static int verbose;
static int fullstop = FULLSTOP_RMMOD;
static DEFINE_MUTEX(fullstop_mutex);
+static atomic_t verbose_sleep_counter;
+
+/*
+ * Sleep if needed from VERBOSE_TOROUT*().
+ */
+void verbose_torout_sleep(void)
+{
+ if (verbose_sleep_frequency > 0 &&
+ verbose_sleep_duration > 0 &&
+ !(atomic_inc_return(&verbose_sleep_counter) % verbose_sleep_frequency))
+ schedule_timeout_uninterruptible(verbose_sleep_duration);
+}
+EXPORT_SYMBOL_GPL(verbose_torout_sleep);
+
+/*
+ * Schedule a high-resolution-timer sleep in nanoseconds, with a 32-bit
+ * nanosecond random fuzz. This function and its friends desynchronize
+ * testing from the timer wheel.
+ */
+int torture_hrtimeout_ns(ktime_t baset_ns, u32 fuzzt_ns, struct torture_random_state *trsp)
+{
+ ktime_t hto = baset_ns;
+
+ if (trsp)
+ hto += (torture_random(trsp) >> 3) % fuzzt_ns;
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ return schedule_hrtimeout(&hto, HRTIMER_MODE_REL);
+}
+EXPORT_SYMBOL_GPL(torture_hrtimeout_ns);
+
+/*
+ * Schedule a high-resolution-timer sleep in microseconds, with a 32-bit
+ * nanosecond (not microsecond!) random fuzz.
+ */
+int torture_hrtimeout_us(u32 baset_us, u32 fuzzt_ns, struct torture_random_state *trsp)
+{
+ ktime_t baset_ns = baset_us * NSEC_PER_USEC;
+
+ return torture_hrtimeout_ns(baset_ns, fuzzt_ns, trsp);
+}
+EXPORT_SYMBOL_GPL(torture_hrtimeout_us);
+
+/*
+ * Schedule a high-resolution-timer sleep in milliseconds, with a 32-bit
+ * microsecond (not millisecond!) random fuzz.
+ */
+int torture_hrtimeout_ms(u32 baset_ms, u32 fuzzt_us, struct torture_random_state *trsp)
+{
+ ktime_t baset_ns = baset_ms * NSEC_PER_MSEC;
+ u32 fuzzt_ns;
+
+ if ((u32)~0U / NSEC_PER_USEC < fuzzt_us)
+ fuzzt_ns = (u32)~0U;
+ else
+ fuzzt_ns = fuzzt_us * NSEC_PER_USEC;
+ return torture_hrtimeout_ns(baset_ns, fuzzt_ns, trsp);
+}
+EXPORT_SYMBOL_GPL(torture_hrtimeout_ms);
+
+/*
+ * Schedule a high-resolution-timer sleep in jiffies, with an
+ * implied one-jiffy random fuzz. This is intended to replace calls to
+ * schedule_timeout_interruptible() and friends.
+ */
+int torture_hrtimeout_jiffies(u32 baset_j, struct torture_random_state *trsp)
+{
+ ktime_t baset_ns = jiffies_to_nsecs(baset_j);
+
+ return torture_hrtimeout_ns(baset_ns, jiffies_to_nsecs(1), trsp);
+}
+EXPORT_SYMBOL_GPL(torture_hrtimeout_jiffies);
+
+/*
+ * Schedule a high-resolution-timer sleep in milliseconds, with a 32-bit
+ * millisecond (not second!) random fuzz.
+ */
+int torture_hrtimeout_s(u32 baset_s, u32 fuzzt_ms, struct torture_random_state *trsp)
+{
+ ktime_t baset_ns = baset_s * NSEC_PER_SEC;
+ u32 fuzzt_ns;
+
+ if ((u32)~0U / NSEC_PER_MSEC < fuzzt_ms)
+ fuzzt_ns = (u32)~0U;
+ else
+ fuzzt_ns = fuzzt_ms * NSEC_PER_MSEC;
+ return torture_hrtimeout_ns(baset_ns, fuzzt_ns, trsp);
+}
+EXPORT_SYMBOL_GPL(torture_hrtimeout_s);
+
#ifdef CONFIG_HOTPLUG_CPU
/*
static int min_online = -1;
static int max_online;
+static int torture_online_cpus = NR_CPUS;
+
+/*
+ * Some torture testing leverages confusion as to the number of online
+ * CPUs. This function returns the torture-testing view of this number,
+ * which allows torture tests to load-balance appropriately.
+ */
+int torture_num_online_cpus(void)
+{
+ return READ_ONCE(torture_online_cpus);
+}
+EXPORT_SYMBOL_GPL(torture_num_online_cpus);
+
/*
* Attempt to take a CPU offline. Return false if the CPU is already
* offline or if it is not subject to CPU-hotplug operations. The
*min_offl = delta;
if (*max_offl < delta)
*max_offl = delta;
+ WRITE_ONCE(torture_online_cpus, torture_online_cpus - 1);
+ WARN_ON_ONCE(torture_online_cpus <= 0);
}
return true;
*min_onl = delta;
if (*max_onl < delta)
*max_onl = delta;
+ WRITE_ONCE(torture_online_cpus, torture_online_cpus + 1);
}
return true;
}
EXPORT_SYMBOL_GPL(torture_online);
+/*
+ * Get everything online at the beginning and ends of tests.
+ */
+static void torture_online_all(char *phase)
+{
+ int cpu;
+ int ret;
+
+ for_each_possible_cpu(cpu) {
+ if (cpu_online(cpu))
+ continue;
+ ret = add_cpu(cpu);
+ if (ret && verbose) {
+ pr_alert("%s" TORTURE_FLAG
+ "%s: %s online %d: errno %d\n",
+ __func__, phase, torture_type, cpu, ret);
+ }
+ }
+}
+
/*
* Execute random CPU-hotplug operations at the interval specified
* by the onoff_interval.
int cpu;
int maxcpu = -1;
DEFINE_TORTURE_RANDOM(rand);
- int ret;
VERBOSE_TOROUT_STRING("torture_onoff task started");
for_each_online_cpu(cpu)
maxcpu = cpu;
WARN_ON(maxcpu < 0);
- if (!IS_MODULE(CONFIG_TORTURE_TEST)) {
- for_each_possible_cpu(cpu) {
- if (cpu_online(cpu))
- continue;
- ret = add_cpu(cpu);
- if (ret && verbose) {
- pr_alert("%s" TORTURE_FLAG
- "%s: Initial online %d: errno %d\n",
- __func__, torture_type, cpu, ret);
- }
- }
- }
-
+ torture_online_all("Initial");
if (maxcpu == 0) {
VERBOSE_TOROUT_STRING("Only one CPU, so CPU-hotplug testing is disabled");
goto stop;
stop:
torture_kthread_stopping("torture_onoff");
+ torture_online_all("Final");
return 0;
}
*/
bool stutter_wait(const char *title)
{
- ktime_t delay;
unsigned int i = 0;
bool ret = false;
int spt;
schedule_timeout_interruptible(1);
} else if (spt == 2) {
while (READ_ONCE(stutter_pause_test)) {
- if (!(i++ & 0xffff)) {
- set_current_state(TASK_INTERRUPTIBLE);
- delay = 10 * NSEC_PER_USEC;
- schedule_hrtimeout(&delay, HRTIMER_MODE_REL);
- }
+ if (!(i++ & 0xffff))
+ torture_hrtimeout_us(10, 0, NULL);
cond_resched();
}
} else {
*/
static int torture_stutter(void *arg)
{
- ktime_t delay;
DEFINE_TORTURE_RANDOM(rand);
int wtime;
if (stutter > 2) {
WRITE_ONCE(stutter_pause_test, 1);
wtime = stutter - 3;
- delay = ktime_divns(NSEC_PER_SEC * wtime, HZ);
- delay += (torture_random(&rand) >> 3) % NSEC_PER_MSEC;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_hrtimeout(&delay, HRTIMER_MODE_REL);
+ torture_hrtimeout_jiffies(wtime, &rand);
wtime = 2;
}
WRITE_ONCE(stutter_pause_test, 2);
- delay = ktime_divns(NSEC_PER_SEC * wtime, HZ);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_hrtimeout(&delay, HRTIMER_MODE_REL);
+ torture_hrtimeout_jiffies(wtime, NULL);
}
WRITE_ONCE(stutter_pause_test, 0);
if (!torture_must_stop())
- schedule_timeout_interruptible(stutter_gap);
+ torture_hrtimeout_jiffies(stutter_gap, NULL);
torture_shutdown_absorb("torture_stutter");
} while (!torture_must_stop());
torture_kthread_stopping("torture_stutter");
projects / linux-2.6-microblaze.git / blobdiff