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POWPF : troubleshooting application with occassional high CPU utilization on Win 7 64 using WinDbg
 

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  1. POWPF : troubleshooting application with occassional high CPU utilization on Win 7 64 using WinDbg
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    <p>I have a .NET 3.5 WPF applicaiton that will occassionalyly utilize 96-99% of CPU time when running only on Win 7 64 bit. Of course when this happens, even the application itself stops working correctly. This is another issue that happens only on the 64 bit version of Windows 7. </p> <p>The application is currently in this state and I will like to use WinDbg or some other debugging tool to capture as much information as possible. Anyone online who can help with this in real time?</p> <p>First off, this is what I can get from Process Explorer: As the attached image shows <img src="https://i.stack.imgur.com/7zaGn.png" alt="enter image description here">, I have a thread count of 40 with a bunch of them having start address: </p> <pre><code>mscorwrks.dll!GetMetaDataInternalInterfaceFromPublic+0x934c. </code></pre> <p>There are about 24 threads currently showing this as the start address. But I cannot relate this to anything in my code. </p> <p>So I am currently attached to the process using WinDbg, which has suspended all threads. Then I did </p> <pre><code>!runaway 3 </code></pre> <p>which gives me:</p> <pre><code>0:039&gt; !runaway 3 User Mode Time Thread Time 33:29bc 0 days 0:27:48.711 21:2880 0 days 0:26:22.021 34:18cc 0 days 0:24:38.873 18:2a04 0 days 0:23:56.753 23:2618 0 days 0:18:58.947 24:27e8 0 days 0:17:36.859 30:21d4 0 days 0:17:05.800 32:248c 0 days 0:17:04.286 35:2b00 0 days 0:16:20.809 22:2680 0 days 0:15:37.597 5:2a28 0 days 0:15:10.234 31:ee4 0 days 0:15:07.348 20:20f0 0 days 0:14:32.903 17:29ac 0 days 0:14:02.202 10:20dc 0 days 0:00:51.152 11:2ad0 0 days 0:00:11.247 37:2c14 0 days 0:00:06.489 38:2f3c 0 days 0:00:01.466 25:1db8 0 days 0:00:00.920 1:2a84 0 days 0:00:00.452 0:1494 0 days 0:00:00.093 2:1ba0 0 days 0:00:00.078 29:53c 0 days 0:00:00.015 27:278c 0 days 0:00:00.015 7:8d4 0 days 0:00:00.015 4:2620 0 days 0:00:00.015 39:215c 0 days 0:00:00.000 36:2088 0 days 0:00:00.000 28:26e0 0 days 0:00:00.000 26:2960 0 days 0:00:00.000 19:2a10 0 days 0:00:00.000 16:2a70 0 days 0:00:00.000 15:24a8 0 days 0:00:00.000 14:2208 0 days 0:00:00.000 13:2bcc 0 days 0:00:00.000 12:2a6c 0 days 0:00:00.000 9:1a38 0 days 0:00:00.000 8:2a98 0 days 0:00:00.000 6:1200 0 days 0:00:00.000 3:2af8 0 days 0:00:00.000 Kernel Mode Time Thread Time 11:2ad0 0 days 0:00:03.650 10:20dc 0 days 0:00:02.230 33:29bc 0 days 0:00:00.686 34:18cc 0 days 0:00:00.577 21:2880 0 days 0:00:00.327 18:2a04 0 days 0:00:00.327 24:27e8 0 days 0:00:00.280 35:2b00 0 days 0:00:00.249 1:2a84 0 days 0:00:00.218 30:21d4 0 days 0:00:00.156 22:2680 0 days 0:00:00.140 5:2a28 0 days 0:00:00.140 37:2c14 0 days 0:00:00.124 23:2618 0 days 0:00:00.109 2:1ba0 0 days 0:00:00.109 25:1db8 0 days 0:00:00.093 20:20f0 0 days 0:00:00.093 17:29ac 0 days 0:00:00.093 0:1494 0 days 0:00:00.078 7:8d4 0 days 0:00:00.062 32:248c 0 days 0:00:00.046 3:2af8 0 days 0:00:00.046 31:ee4 0 days 0:00:00.031 8:2a98 0 days 0:00:00.031 38:2f3c 0 days 0:00:00.015 27:278c 0 days 0:00:00.015 16:2a70 0 days 0:00:00.015 15:24a8 0 days 0:00:00.015 39:215c 0 days 0:00:00.000 36:2088 0 days 0:00:00.000 29:53c 0 days 0:00:00.000 28:26e0 0 days 0:00:00.000 26:2960 0 days 0:00:00.000 19:2a10 0 days 0:00:00.000 14:2208 0 days 0:00:00.000 13:2bcc 0 days 0:00:00.000 12:2a6c 0 days 0:00:00.000 9:1a38 0 days 0:00:00.000 6:1200 0 days 0:00:00.000 4:2620 0 days 0:00:00.000 </code></pre> <p>When I issue <code>g</code> to continue the process, I get </p> <pre><code>0:039&gt; g (2944.1d6c): Break instruction exception - code 80000003 (first chance) mscorlib_ni+0x367240: 000007fe`f8337240 cc int 3 </code></pre> <p>and process remains suspended. How do I continue?</p>
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