Ken - I never knew how to take a sample of the processes. It's given me some
visibility into the spinning beach ball. I still get the deadlock in the
commitEditing which is in saveDocumentWithDelegate only on some documents when
I edit text that requires me to scroll an NSTextView. Does anything jump out
at you in this call graph? What is NSOperation waiting for?
Call graph:
2761 Thread_1166668 DispatchQueue_1: com.apple.main-thread (serial)
2761 start
2761 main
2761 NSApplicationMain
2761 -[NSApplication run]
2761 -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:]
2761 _DPSNextEvent
2761 BlockUntilNextEventMatchingListInMode
2761 ReceiveNextEventCommon
2761 RunCurrentEventLoopInMode
2761 CFRunLoopRunSpecific
2761 __CFRunLoopRun
2761 __NSFireTimer
2761 -[SRMainWindowController
checkToSaveDirtyDoc:]
2761 -[PNDocument
saveDocumentWithDelegate:didSaveSelector:contextInfo:]
2761
-[NSManagedObjectContext(NSEditorAndEditorRegistration) commitEditing]
2761 -[NSController commitEditing]
2761 -[NSValueBinder commitEditing]
2761 -[NSValueBinder discardEditing]
2761 -[_NSTextPlugin
showValue:inObject:]
2761 -[NSTextStorage endEditing]
2761 -[NSTextStorage
processEditing]
2761 -[NSTextStorage
_notifyEdited:range:changeInLength:invalidatedRange:]
2761 -[NSLayoutManager
textStorage:edited:range:changeInLength:invalidatedRange:]
2761
-[NSLayoutManager(NSPrivate) _resizeTextViewForTextContainer:]
2761
-[NSTextView(NSPrivate) _setFrameSize:forceScroll:]
2761 -[NSView
setFrameSize:]
2761 -[NSView
_postFrameChangeNotification]
2761 -[NSClipView
_reflectDocumentViewFrameChange]
2761 -[NSClipView
_scrollTo:animate:]
2761
-[NSScrollView scrollClipView:toPoint:]
2761
-[NSClipView scrollToPoint:]
2761
-[NSClipView _immediateScrollToPoint:]
2761
-[NSView displayIfNeeded]
2761
-[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:]
2761
-[NSOperationQueue waitUntilAllOperationsAreFinished]
2761 -[NSOperation waitUntilFinished]
2761 -[__NSOperationInternal waitUntilFinished]
2761 _pthread_cond_wait
2761 __semwait_signal
2761 Thread_1166672 DispatchQueue_2: com.apple.libdispatch-manager
(serial)
2761 start_wqthread
2761 _pthread_wqthread
2761 _dispatch_worker_thread2
2761 _dispatch_queue_invoke
2761 _dispatch_mgr_invoke
2761 kevent
2761 Thread_1166673 DispatchQueue_6: com.apple.root.default-priority
(serial)
2761 start_wqthread
2761 _pthread_wqthread
2761 _dispatch_worker_thread2
2761 _dispatch_call_block_and_release
2761 __doStart2
2761 -[__NSOperationInternal start]
2761 -[_NSViewDrawOperation main]
2761 -[NSTextView _drawRect:clip:]
2761 -[NSTextView drawRect:]
2761 -[NSConcreteTextStorage _lockForReading]
2761 -[NSViewHierarchyLock
lockForReadingWithExceptionHandler:]
2761 _pthread_cond_wait
2761 __semwait_signal
On Dec 22, 2010, at 12:37 AM, Ken Thomases wrote:
> On Dec 21, 2010, at 10:08 PM, Brad Stone wrote:
>
>> I have an NSTextView that has about 1,900 characters in it. Just regular
>> text. If I edit the text and save my app hangs at [[self
>> managedObjectContext] commitEditing]; I found setting nonContinuousLayout
>> to NO in the NSTextView prevents the hang but that's not really solving the
>> problem.
>>
>> Here's what's strange. If I expand the window so the all the text shows
>> without the scroll bar it doesn't hang. If I edit the same text but scroll
>> down the get it I get a hang. If I set nonContiguousLayout to NO it doesn't
>> hang in either scenario.
>>
>> What advice can anyone give as to how I can address this problem?
>
> One useful tool is a sample of the process to see where each of its threads
> is spending its time. This can help identify causes of deadlocks, which is
> what it seems like you have.
>
> There are several process-sampling tools in Mac OS X: the "sample" command,
> the Sample Process command in Activity Monitor, the Time Profile (All Thread
> States) tools of Shark or Instruments. For sharing on a mailing list, the
> text files produced by the sample command are probably simplest.
>
> Regards,
> Ken
>
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