+static int
+pmThreadGetUrgency(uint64_t *rt_period, uint64_t *rt_deadline)
+{
+ int urgency;
+ uint64_t arg1, arg2;
+
+ urgency = thread_get_urgency(current_processor()->next_thread, &arg1, &arg2);
+
+ if (urgency == THREAD_URGENCY_REAL_TIME) {
+ if (rt_period != NULL)
+ *rt_period = arg1;
+
+ if (rt_deadline != NULL)
+ *rt_deadline = arg2;
+ }
+
+ return(urgency);
+}
+
+#if DEBUG
+uint32_t urgency_stats[64][THREAD_URGENCY_MAX];
+#endif
+
+#define URGENCY_NOTIFICATION_ASSERT_NS (5 * 1000 * 1000)
+uint64_t urgency_notification_assert_abstime_threshold, urgency_notification_max_recorded;
+
+void
+thread_tell_urgency(int urgency,
+ uint64_t rt_period,
+ uint64_t rt_deadline,
+ uint64_t sched_latency,
+ thread_t nthread)
+{
+ uint64_t urgency_notification_time_start, delta;
+ boolean_t urgency_assert = (urgency_notification_assert_abstime_threshold != 0);
+ assert(get_preemption_level() > 0 || ml_get_interrupts_enabled() == FALSE);
+#if DEBUG
+ urgency_stats[cpu_number() % 64][urgency]++;
+#endif
+ if (!pmInitDone
+ || pmDispatch == NULL
+ || pmDispatch->pmThreadTellUrgency == NULL)
+ return;
+
+ SCHED_DEBUG_PLATFORM_KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED,MACH_URGENCY) | DBG_FUNC_START, urgency, rt_period, rt_deadline, sched_latency, 0);
+
+ if (__improbable((urgency_assert == TRUE)))
+ urgency_notification_time_start = mach_absolute_time();
+
+ current_cpu_datap()->cpu_nthread = nthread;
+ pmDispatch->pmThreadTellUrgency(urgency, rt_period, rt_deadline);
+
+ if (__improbable((urgency_assert == TRUE))) {
+ delta = mach_absolute_time() - urgency_notification_time_start;
+
+ if (__improbable(delta > urgency_notification_max_recorded)) {
+ /* This is not synchronized, but it doesn't matter
+ * if we (rarely) miss an event, as it is statistically
+ * unlikely that it will never recur.
+ */
+ urgency_notification_max_recorded = delta;
+
+ if (__improbable((delta > urgency_notification_assert_abstime_threshold) && !machine_timeout_suspended()))
+ panic("Urgency notification callout %p exceeded threshold, 0x%llx abstime units", pmDispatch->pmThreadTellUrgency, delta);
+ }
+ }
+
+ SCHED_DEBUG_PLATFORM_KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED,MACH_URGENCY) | DBG_FUNC_END, urgency, rt_period, rt_deadline, 0, 0);
+}
+
+void
+machine_thread_going_on_core(__unused thread_t new_thread,
+ __unused int urgency,
+ __unused uint64_t sched_latency,
+ __unused uint64_t dispatch_time)
+{
+}
+
+void
+machine_thread_going_off_core(__unused thread_t old_thread, __unused boolean_t thread_terminating, __unused uint64_t last_dispatch)
+{
+}
+
+void
+machine_max_runnable_latency(__unused uint64_t bg_max_latency,
+ __unused uint64_t default_max_latency,
+ __unused uint64_t realtime_max_latency)
+{
+}
+
+void
+machine_work_interval_notify(__unused thread_t thread,
+ __unused uint64_t work_interval_id,
+ __unused uint64_t start_abstime,
+ __unused uint64_t finish_abstime,
+ __unused uint64_t deadline_abstime,
+ __unused uint64_t next_start_abstime,
+ __unused uint16_t urgency,
+ __unused uint32_t flags)
+{
+}
+
+void
+active_rt_threads(boolean_t active)
+{
+ if (!pmInitDone
+ || pmDispatch == NULL
+ || pmDispatch->pmActiveRTThreads == NULL)
+ return;
+
+ pmDispatch->pmActiveRTThreads(active);
+}
+
projects / apple / xnu.git / blobdiff