CODEWITHSUNDEEP
.netmultithreading
Daniel Mošmondor
Daniel Mošmondor

Reputation: 19986

Finding Needle in a haystack (thread in the process)

One of my threads in the process is burning one CPU core to the full extent. 8 cores, 12,5% CPU used. Look at this (procexp screenshot)

http://dl.dropbox.com/u/10020780/scr1.PNG

Another thing that bothers me it Start Address of 0x0!?!?

I am trying to find the thread in the list provided with the VS2008 Thread View, but not a single thread there (or I have overlooked) has a tight loop (without Sleep()) or a clear indication of trouble.

Any hints?

CASE UPDATE:

It seems like I'm beyond my code realm on this one; I'll post a pictures obtained with STACK button, so you can maybe have some hunch on the issue at hand.

First situation

http://dl.dropbox.com/u/10020780/smallstack.PNG

Second situation (same thread, I get this two alternating)

http://dl.dropbox.com/u/10020780/largerstack.PNG

Guys, where am I? I do use Windows Media, Sockets, ...

Upvotes: 0

Views: 139

Answers (2)

Daniel Mošmondor
Daniel Mošmondor

Reputation: 19986

Humph - after lot of headbanging, I figured out that (I should do that sooner) thread id from procexp can be found inside visual studio as well - and found the thread that caused the problem. It was tight loop, that I resolved with Sleep(10).

Upvotes: 0

Menahem
Menahem

Reputation: 4144

have you tried to take a hang dump with Adplus, and running the !runaway commnand in WinDbg ? this will show you for sure what thread, and then you can use !clrstack to get what the thread aws doing.

Upvotes: 1

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