#memcantgetreserved - 2612 Thread_8625 DispatchQueue_1: com.apple.main-thread (serial) + 2612 start (in libdyld.dylib) + 1 [0x7fff7e92d0a1]

MEMCANTGERESERVED
2612 Thread_8625 DispatchQueue_1: com.apple.main-thread (serial) + 2612 start (in libdyld.dylib) + 1 [0x7fff7e92d0a1]

#memcantgetreserved Thanks to the memory assignment the ram can be used efficiently and the CPU memory-manager has the possibility to manage the adressing. Normally the dressing takes about 10% of the CPU power and doesn’t use a lot of volatility. As it is similar to high use scenarios I was starting an application that was using the camera with an back call to an bigger file from before that then gets deleted, wich automatically causes that the assignment changes and the address manager has to put the new data into free cells that are like little gaps between already written data.

 

Sampling completed, processing symbols...

Analysis of sampling SimStreamProcessorService (pid 942) every 1 millisecond

Process:         SimStreamProcessorService [942]

Path:            /Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/A/Resources/SimStreamProcessorServices.simdeviceio/Contents/XPCServices/SimStreamProcessorService.xpc/Contents/MacOS/SimStreamProcessorService

Load Address:    0x10a87f000

Identifier:      com.apple.CoreSimulator.SimStreamProcessorServices.SimStreamProcessorService

Version:         572.2 (572.2)

Build Info:      CoreSimulator-572002000000000~25

Code Type:       X86-64

Parent Process:  ??? [1]

 

Date/Time:       2018-09-22 13:26:59.969 +0200

Launch Time:     2018-09-22 13:25:34.999 +0200

OS Version:      Mac OS X 10.14 (18A377a)

Report Version:  7

Analysis Tool:   /usr/bin/sample

 

Physical footprint:         280.9M

Physical footprint (peak):  296.0M

----

 

Call graph:

The system is first releasing memory.

    2612 Thread_8625   DispatchQueue_1: com.apple.main-thread  (serial)

    + 2612 start  (in libdyld.dylib) + 1  [0x7fff7e92d0a1]

    +   2612 main  (in SimStreamProcessorService) + 177  [0x10a887e71]

    +     2612 +[ROCKSessionManager(ROCKObsoleteConstructors) forwardingProxyWithInstance:eventQueue:eventHandler:]  (in ROCKit) + 73  [0x7fff74e755c4]

    +       2612 +[ROCKSessionManager 

Now it tries to peer the new data with the already created data but it fails

forwardingProxyWithInstance:options:eventQueue:eventHandler:]  (in ROCKit) + 605  [0x7fff74e71e66]

    +         2612 +[ROCKForwardingProxy forwardingProxyWithInstance:options:eventQueue:eventHandler:]  (in ROCKit) + 915  [0x7fff74e7bbfb]

    +           2612 xpc_main  (in libxpc.dylib) + 433  [0x7fff7eb639e5]

    +             2612 _xpc_objc_main  (in libxpc.dylib) + 612  [0x7fff7eb63f1f]

    +               2612 NSApplicationMain  (in AppKit) + 780  [0x7fff4ee93e1b]

    +                 2612 -[NSApplication run]  (in AppKit) + 699  [0x7fff4eea46e1]

    +                   2612 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]  (in AppKit) + 1362  [0x7fff4eeaa67e]

The app creates an memory mask, thats necessary for a efficient memory management

    +                     2612 _DPSNextEvent  (in AppKit) + 997  [0x7fff4eeab8df]

    +                       2612 _BlockUntilNextEventMatchingListInModeWithFilter  (in HIToolbox) + 64  [0x7fff50bee348]

    +                         2612 ReceiveNextEventCommon  (in HIToolbox) + 618  [0x7fff50bee5cb]

    +                           2612 RunCurrentEventLoopInMode  (in HIToolbox) + 293  [0x7fff50bee895]

    +                             2612 CFRunLoopRunSpecific  (in CoreFoundation) + 463  [0x7fff51954ce4]

    +                               2612 __CFRunLoopRun  (in CoreFoundation) + 1654  [0x7fff519555ad]

    +                                 2612 __CFRunLoopServiceMachPort  (in CoreFoundation) + 337  [0x7fff5195605e]

    +                                   2612 mach_msg  (in libsystem_kernel.dylib) + 60  [0x7fff7ea66174]

    +                                     2612 mach_msg_trap  (in libsystem_kernel.dylib) + 10  

The loop starts. #memcantgetreserved

 

[0x7fff7ea65c2a]

    2612 Thread_8645: com.apple.NSEventThread

    + 2612 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff7eb1e425]

    +   2612 _pthread_start  (in libsystem_pthread.dylib) + 70  [0x7fff7eb222a7]

    +     2612 _pthread_body  (in libsystem_pthread.dylib) + 126  [0x7fff7eb1f33d]

    +       2612 _NSEventThread  (in AppKit) + 160  [0x7fff4eeb4505]

    +         2612 CFRunLoopRunSpecific  (in CoreFoundation) + 463  [0x7fff51954ce4]

    +           2612 __CFRunLoopRun  (in CoreFoundation) + 1654  [0x7fff519555ad]

    +             2612 __CFRunLoopServiceMachPort  (in CoreFoundation) + 337  [0x7fff5195605e]

    +               2612 mach_msg  (in libsystem_kernel.dylib) + 60  [0x7fff7ea66174]

    +                 2612 mach_msg_trap  (in libsystem_kernel.dylib) + 10  [0x7fff7ea65c2a]

    2612 Thread_10070

    + 2612 start_wqthread  (in libsystem_pthread.dylib) + 13  [0x7fff7eb1e415]

    +   2612 _pthread_wqthread  (in libsystem_pthread.dylib) + 446  [0x7fff7eb1e641]

    +     2612 __workq_kernreturn  (in libsystem_kernel.dylib) + 10  [0x7fff7ea675be]

    2612 Thread_10550

    + 2612 start_wqthread  (in libsystem_pthread.dylib) + 13  [0x7fff7eb1e415]

    +   2612 _pthread_wqthread  (in libsystem_pthread.dylib) + 446  [0x7fff7eb1e641]

    +     2612 __workq_kernreturn  (in libsystem_kernel.dylib) + 10  [0x7fff7ea675be]

    2612 Thread_10762

      2612 start_wqthread  (in libsystem_pthread.dylib) + 13  [0x7fff7eb1e415]

        2612 _pthread_wqthread  (in libsystem_pthread.dylib) + 446  [0x7fff7eb1e641]

          2612 __workq_kernreturn  (in libsystem_kernel.dylib) + 10  [0x7fff7ea675be]

 

Total number in stack (recursive counted multiple, when >=5):

 

Sort by top of stack, same collapsed (when >= 5):

        __workq_kernreturn  (in libsystem_kernel.dylib)        7836

        mach_msg_trap  (in libsystem_kernel.dylib)        5224

 

Binary Images:

       0x10a87f000 -        0x10a88eff7  com.apple.CoreSimulator.SimStreamProcessorServices.SimStreamProcessorService (572.2 - 572.2) <9FEE773F-A44B-3A2E-8434-03EC4C1A6DD5> /Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/A/Resources/SimStreamProcessorServices.simdeviceio/Contents/XPCServices/SimStreamProcessorService.xpc/Contents/MacOS/SimStreamProcessorService

       0x10a89b000 -        0x10a8a5ffb  com.apple.CoreSimulator.CoreSimDeviceIO (572.2 - 572.2) <349901CB-0359-3185-A136-39DFBE1117CD> /Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/A/Frameworks/CoreSimDeviceIO.framework/Versions/A/CoreSimDeviceIO

 

These individual images are rendered as a whole (ie as a 360 ° image) each time, which gave me the idea of simply removing content from non-displayed chunks (parts of the image). Because the images were re-rendered so often, and at the same time a tarp detection was running and fake news EasterEggs (small features that developers program, but are usually hidden) were loaded, the cache, the GPU (graphics card) was completely "stuffed."

 

 

Cache: A smartphone has a so-called memory that contains the data that is needed. Now if a graphic is to be executed, then the graphics card loads the required data into its own small main memory so that it can access the data faster.

 

The cache is volatile, which means that the cache is automatically cleared when a process is finished. So you could compare the situation of the cache at that moment with a bus: If you want to bring 100 people from A to B, but the bus only has room for 20, then people just go one after the other and you do not push 100 people into it which otherwise suffocate or the bus could burst :)

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