xnu-2782.20.48.tar.gz

[apple/xnu.git] / iokit / Kernel / IOTimerEventSource.cpp

diff --git a/iokit/Kernel/IOTimerEventSource.cpp b/iokit/Kernel/IOTimerEventSource.cpp
index ed45f6ab94ce550e28c44e473d2897064a77c482..df939da91c0fe02d1ef4eaf4804f99cd78c0d0ee 100644 (file)
--- a/iokit/Kernel/IOTimerEventSource.cpp
+++ b/iokit/Kernel/IOTimerEventSource.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2000, 2009-2010 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -25,17 +25,6 @@
  * 
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
-/*
- * Copyright (c) 1999 Apple Computer, Inc.  All rights reserved. 
- *
- * IOTimerEventSource.cpp
- *
- * HISTORY
- * 2-Feb-1999          Joe Liu (jliu) created.
- * 1999-10-14          Godfrey van der Linden(gvdl)
- *             Revamped to use thread_call APIs
- *
- */
 
 #include <sys/cdefs.h>
 
@@ -51,6 +40,10 @@ __END_DECLS
 #include <IOKit/IOWorkLoop.h>
 
 #include <IOKit/IOTimeStamp.h>
+#include <IOKit/IOKitDebug.h>
+#if CONFIG_DTRACE
+#include <mach/sdt.h>
+#endif
 
 #define super IOEventSource
 OSDefineMetaClassAndStructors(IOTimerEventSource, IOEventSource)
@@ -63,13 +56,42 @@ OSMetaClassDefineReservedUnused(IOTimerEventSource, 5);
 OSMetaClassDefineReservedUnused(IOTimerEventSource, 6);
 OSMetaClassDefineReservedUnused(IOTimerEventSource, 7);
 
+#if IOKITSTATS
+
+#define IOStatisticsInitializeCounter() \
+do { \
+       IOStatistics::setCounterType(IOEventSource::reserved->counter, kIOStatisticsTimerEventSourceCounter); \
+} while (0)
+
+#define IOStatisticsOpenGate() \
+do { \
+       IOStatistics::countOpenGate(me->IOEventSource::reserved->counter); \
+} while (0)
+
+#define IOStatisticsCloseGate() \
+do { \
+       IOStatistics::countCloseGate(me->IOEventSource::reserved->counter); \
+} while (0)
+
+#define IOStatisticsTimeout() \
+do { \
+       IOStatistics::countTimerTimeout(me->IOEventSource::reserved->counter); \
+} while (0)
+
+#else
+
+#define IOStatisticsInitializeCounter()
+#define IOStatisticsOpenGate()
+#define IOStatisticsCloseGate()
+#define IOStatisticsTimeout()
+
+#endif /* IOKITSTATS */
+
 // 
 // reserved != 0 means IOTimerEventSource::timeoutAndRelease is being used,
 // not a subclassed implementation. 
 //
 
-bool IOTimerEventSource::checkForWork() { return false; }
-
 // Timeout handler function. This function is called by the kernel when
 // the timeout interval expires.
 //
@@ -77,6 +99,8 @@ void IOTimerEventSource::timeout(void *self)
 {
     IOTimerEventSource *me = (IOTimerEventSource *) self;
 
+    IOStatisticsTimeout();
+
     if (me->enabled && me->action)
     {
         IOWorkLoop *
@@ -85,13 +109,26 @@ void IOTimerEventSource::timeout(void *self)
         {
             Action doit;
             wl->closeGate();
+            IOStatisticsCloseGate();
             doit = (Action) me->action;
             if (doit && me->enabled && AbsoluteTime_to_scalar(&me->abstime))
             {
-                IOTimeStampConstant(IODBG_TIMES(IOTIMES_ACTION),
-                                    (uintptr_t) doit, (uintptr_t) me->owner);
+               bool    trace = (gIOKitTrace & kIOTraceTimers) ? true : false;
+               
+               if (trace)
+                       IOTimeStampStartConstant(IODBG_TIMES(IOTIMES_ACTION),
+                                                                                        VM_KERNEL_UNSLIDE(doit), (uintptr_t) me->owner);
+                               
                 (*doit)(me->owner, me);
+#if CONFIG_DTRACE
+               DTRACE_TMR3(iotescallout__expire, Action, doit, OSObject, me->owner, void, me->workLoop);
+#endif
+                
+                               if (trace)
+                       IOTimeStampEndConstant(IODBG_TIMES(IOTIMES_ACTION),
+                                                                                  VM_KERNEL_UNSLIDE(doit), (uintptr_t) me->owner);
             }
+            IOStatisticsOpenGate();
             wl->openGate();
         }
     }
@@ -104,6 +141,8 @@ void IOTimerEventSource::timeoutAndRelease(void * self, void * c)
           must be cast to "long" before, in order to tell GCC we're not truncating a pointer. */
        SInt32 count = (SInt32) (long) c;
 
+    IOStatisticsTimeout();
+       
     if (me->enabled && me->action)
     {
         IOWorkLoop *
@@ -112,13 +151,26 @@ void IOTimerEventSource::timeoutAndRelease(void * self, void * c)
         {
             Action doit;
             wl->closeGate();
+            IOStatisticsCloseGate();
             doit = (Action) me->action;
             if (doit && (me->reserved->calloutGeneration == count))
             {
-                IOTimeStampConstant(IODBG_TIMES(IOTIMES_ACTION),
-                                    (uintptr_t) doit, (uintptr_t) me->owner);
+               bool    trace = (gIOKitTrace & kIOTraceTimers) ? true : false;
+               
+               if (trace)
+                       IOTimeStampStartConstant(IODBG_TIMES(IOTIMES_ACTION),
+                                                                                        VM_KERNEL_UNSLIDE(doit), (uintptr_t) me->owner);
+                               
                 (*doit)(me->owner, me);
+#if CONFIG_DTRACE
+               DTRACE_TMR3(iotescallout__expire, Action, doit, OSObject, me->owner, void, me->workLoop);
+#endif
+                
+                               if (trace)
+                       IOTimeStampEndConstant(IODBG_TIMES(IOTIMES_ACTION),
+                                                                                  VM_KERNEL_UNSLIDE(doit), (uintptr_t) me->owner);
             }
+            IOStatisticsOpenGate();
             wl->openGate();
         }
     }
@@ -145,6 +197,8 @@ bool IOTimerEventSource::init(OSObject *inOwner, Action inAction)
     if (!calloutEntry)
         return false;
 
+    IOStatisticsInitializeCounter();
+
     return true;
 }
 
@@ -315,7 +369,7 @@ IOReturn IOTimerEventSource::wakeAtTime(AbsoluteTime inAbstime)
             reserved->workLoop = workLoop;
             reserved->calloutGeneration++;
             if (thread_call_enter1_delayed((thread_call_t) calloutEntry, 
-                    (void *) reserved->calloutGeneration, inAbstime))
+                    (void *)(uintptr_t) reserved->calloutGeneration, inAbstime))
             {
                 release();
                 workLoop->release();