Random App Crash

[dantheman]

Hi All,

i've developed this Smart Device Application but i'm having all sorts
of random crashing i suspect to be caused by memory leaks or over all
performance issues, so i've ran the performance test to evaluate the
problems now i have these different reports and can't seem to see the
causing problem. here is a copy of the report ran when the application
ended by crashing.

what i did was started the application and opened like 4 or 5 times one
form that's tied to a button and closed that form. That form loads a
bunch of dropdowns of 20 to 50 records each

here is stats report any help reading this would be much appreciated

counter total last datum
n mean min max
Total Program Run Time (ms) 75278 -
- - - -
App Domains Created 1 -
- - - -
App Domains Unloaded 2 -
- - - -
Assemblies Loaded 13 -
- - - -
Classes Loaded 1254 -
- - - -
Methods Loaded 3702 -
- - - -
Closed Types Loaded 81 -
- - - -
Closed Types Loaded per Definition 81 19
20 4 1 19
Open Types Loaded 7 -
- - - -
Closed Methods Loaded 3 -
- - - -
Closed Methods Loaded per Definition 3 1
3 1 1 1
Open Methods Loaded 0 -
- - - -
Threads in Thread Pool - 0
2 0 0 1
Pending Timers - 0
4 0 0 1
Scheduled Timers 2 -
- - - -
Timers Delayed by Thread Pool Limit 0 -
- - - -
Work Items Queued 2 -
- - - -
Uncontested Monitor.Enter Calls 739 -
- - - -
Contested Monitor.Enter Calls 0 -
- - - -
Peak Bytes Allocated (native + managed) 2909472 -
- - - -
Managed Objects Allocated 34292 -
- - - -
Managed Bytes Allocated 1975036 28
34292 57 8 65548
Managed String Objects Allocated 2645 -
- - - -
Bytes of String Objects Allocated 96120 -
- - - -
Garbage Collections (GC) 1 -
- - - -
Bytes Collected By GC 741576 741576
1 741576 741576 741576
Managed Bytes In Use After GC - 273120
1 273120 273120 273120
Total Bytes In Use After GC - 2587280
1 2587280 2587280 2587280
GC Compactions 0 -
- - - -
Code Pitchings 0 -
- - - -
Calls to GC.Collect 0 -
- - - -
GC Latency Time (ms) 31 31
1 31 31 31
Pinned Objects 0 -
- - - -
Objects Moved by Compactor 0 -
- - - -
Objects Not Moved by Compactor 0 -
- - - -
Objects Finalized 1250 -
- - - -
Boxed Value Types 7563 -
- - - -
Process Heap - 1600
9082 85511 72 139720
Short Term Heap - 0
6198 1336 0 42136
JIT Heap - 0
6554 403838 0 797712
App Domain Heap - 0
23683 414109 0 666568
GC Heap - 0
40 657408 0 1314816
Native Bytes Jitted 759712 168
1965 386 80 27584
Methods Jitted 1965 -
- - - -
Bytes Pitched 0 0
0 0 0 0
Methods Pitched 0 -
- - - -
Method Pitch Latency Time (ms) 0 0
0 0 0 0
Exceptions Thrown 86 -
- - - -
Platform Invoke Calls 1903 -
- - - -
COM Calls Using a vtable 0 -
- - - -
COM Calls Using IDispatch 0 -
- - - -
Complex Marshaling 74 -
- - - -
Runtime Callable Wrappers 0 -
- - - -
Socket Bytes Sent 0 -
- - - -
Socket Bytes Received 0 -
- - - -
Controls Created 248 -
- - - -
Brushes Created 22 -
- - - -
Pens Created 6 -
- - - -
Bitmaps Created 373 -
- - - -
Regions Created 10 -
- - - -
Fonts Created 7 -
- - - -
Graphics Created (FromImage) 0 -
- - - -
Graphics Created (CreateGraphics) 71 -
- - - -

anybody see any issues that can help me
thankx

 

[Guest]

Only ~3MB of peak memory use seems small so that should be fine. Seems like
a large number of boxed types for the number of objects created, but that
might just be your architecture. Since you're in a GC environment, leaks
are highly unlikely (unless you're doing unsafe code).

What's the nature of the "crash"? App shutdown with no warning? OOM?
Native Exception? Managed Exception?

-Chris

 

[Guest]

here is stats report any help reading this would be much appreciated

Very interesting report. Where did you get that from?

Greetings

 

[Guest]

CF RPM (Remote Performance Monitor). Comes with CF 2.0SP1

-Chris

 

[dantheman]

hi Chris,

not doing any unsafe code. here is the message i receive from the crash
i assume this is a Native Exception right? i also get an OOM crash some
times doing the same thing
myapp.exe
Exception

à Microsoft.AGL.Common.MISC.HandleAr()
à System.Drawing.Bitmap._InitFromMemoryStream()
à System.Drawing.Bitmap..ctor()
à myapp.Form1.OnPaint()
à System.Windows.Forms.Control.WnProc()
à System.Windows.Forms.ContainerControl.WnProc()
à System.Windows.Forms.Form.WnProc()
à System.Windows.Forms.Control._InternalWnProc()
à Microsoft.AGL.Forms.EVL.EnterMainLoop()
à System.Windows.Forms.Application.Run()
à myapp.Form1.Main()

this form has 3 combobox that i fill using a separate tread with around
20-50 records in each a few text boxes and that's about it

thankx for the help

 

[dantheman]

hi Guest,

You have to create a new registry key on your device
called
"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETCompactFramework\PerfMonitor".

In this key, create a DWORD value called "Counters".
When you set "Counters" to 1,

performance counters are enabled,

to disable them set "Counters" to 0.

 

[dantheman]

hi Chris,

where can i access the "CF RPM" tool is the way i use it right know via
the creation of the reg key in my previous post the best way to use it
or is there a GUI in visual studio or something i can use

 

[dantheman]

hi Chris,

where can i access the "CF RPM" tool is the way i use it right know via
the creation of the reg key in my previous post the best way to use it
or is there a GUI in visual studio or something i can use

thankx

 

[Guest]

It's a part of SP1 beta for CF v2:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=362741&SiteID=1

 

[Hilton]

Hi,

You're using a Bitmap, are you calling Dispose() on them? If not, you will
eventually get an OOM exception. It still bugs me that we have to do our
own memory management in C#, and yes, I will write this soapbox comment
everytime I mention Bitmap.Dispose(). It is just so wrong, makes me
feel dirty, I think I'll go take a shower.

Hilton



hi Chris,

not doing any unsafe code. here is the message i receive from the crash
i assume this is a Native Exception right? i also get an OOM crash some
times doing the same thing
myapp.exe
Exception

à Microsoft.AGL.Common.MISC.HandleAr()
à System.Drawing.Bitmap._InitFromMemoryStream()
à System.Drawing.Bitmap..ctor()
à myapp.Form1.OnPaint()
à System.Windows.Forms.Control.WnProc()
à System.Windows.Forms.ContainerControl.WnProc()
à System.Windows.Forms.Form.WnProc()
à System.Windows.Forms.Control._InternalWnProc()
à Microsoft.AGL.Forms.EVL.EnterMainLoop()
à System.Windows.Forms.Application.Run()
à myapp.Form1.Main()

this form has 3 combobox that i fill using a separate tread with around
20-50 records in each a few text boxes and that's about it

thankx for the help