Thread activity tag does not have any data
I cannot get the WPR/WPA to show anything other than <unknown> in the Thread Activity Tag column.I'm using standard profiles CPU+GeneralProfile+XAMLActivity+XAMLApplication.Are there any special...
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CPU Usage data was tuncated by trace rundown.
HI,why did the trace rundown truncate my CPU sample data as shown below?Ah_Chao|| MCSE,VCP,EMCSAe
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what does Trace Rundown mean?
Hi,I collected a ETW trace through WPR, after that, I opened the trace with WPA, but there is a big Trace Rundown shown for every graph, what caused this and how to avoid it?Ah_Chao|| MCSE,VCP,EMCSAe
View ArticleGpuview out of memory error
Hello All,I get the error "Most likely ran out of memory during load" whenever I try to analyze a trace taken from GPUview using the command gpuview Merged.etlI have also tried setting limit with...
View ArticleCheck Explorer Init end time outside of WPT / Xperf
Hi,I am trying to figure out a way to check when the Explorer Init phase is ending for user sessions logging in to Windows. Anybody knows how Windows actually decide when the Explorer Init phase has...
View ArticleDomentation related Dumbpfile.xml which we get from tracerpt
Hello All,I am looking for some documentation source where dumpfile.xml is explained in detail which we get from converting etl file using tracerpt command. Till now I have only found glimpses of it...
View ArticleVideo glitch test
Hi all,I'm new in WPA.My app uses Direct3D to perform camera filter issues.Besides, I found it can test Video glitch in WPR.So, how can I analyse my app using it? (Can Video glitch in WPR help to test...
View ArticleError when I open Window menu of WPA
at WPA of Win8.1, when I open Window menu I see in the Diagnostic console the message:Error: There was an error loading Local Preferences from C:\Users\George\AppData\Local\Windows Performance...
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large gap between IO Time and Disk Service Time
Hi,I'm now having serious I/O performance issue. I saw large gap (milliseconds) between IO Time and Disk Service Time. How to understand this gap? Is there any resource could tell the meaning of the...
View ArticleFormatting Error
When I open my memory card, it displays that you need to format your memory card.But when I start formatting it,Windows displays a message that it cannot be formatted.What should I do?
View ArticleDetailed execution profiling of custom kernel mode driver
Hi all. We have a custom wdm USB audio driver that I'd like to profile. I'm most interested in the URB completion processing code which runs at IRQL_DISPATCH. I run an app that uses the driver, but...
View ArticleBug(?): Windows Perfomance Recorder (wpr.exe) uses incorrect profile file
Hi,There seems to be a strange issue in Windows Performance Recorder, where it might not load the profile file specified on the command line. To reproduce the problem:1. Copy...
View ArticleWindows cannot startup after installing my minifilter driver
Hi, everyone.Recently, I'm triying to write a file system minifilter driver to intercept some I/O operations like "IRP_MJ_CREATE" to do some trace logging. I wrote a windows service which is to be...
View ArticleDbgHelp and non-PDB symbol lookup ?
Hi.I was afraid of asking this, as I know I'll get barked at, but am keen enough now to risk ridicule.WPT is really awesome, but is limited to PDBs in its symbol lookup. In seeking symbols for...
View ArticleWPR command line fails to generate etl file for hibernate and standby on/off...
The following WPR cmd line fails to generate an etl in the results directory:wpr.exe -start "GeneralProfile" -onoffscenario Hibernate -filemode -numIterations 3 -onoffresultspath...
View ArticleThe etw trace file generated by tracelog.exe doesn't include embedded manifest
Hi Expert,Currently we migrated to tracelog.exe from logman to create etw log session, listen to our service providers to trace down events to disk. The reason why we switch to tracelog.exe is to...
View ArticleTo what extend will custom events integrate in WPA?
What i would like to achieve is to get an overview of performance in terms of my applications business domain (Think of a graph of my_operations per second, my_operations queue depth, my_operations for...
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WPA displays negative CPU usage in view "CPU Usage (Precise)"
We are running a Win 2008 R2 server on an Hyper-V host. When I run "xperf" on the server and look at the data in Windows Performance Analyzer (Version 6.3.9600.16384) using the "CPU Usage (Precise)"...
View ArticleShow line numbers or offsets in stack traces.
WPT is a really great toolkit, but what currently missing for me is that when viewing stack traces, there is no way to know from which exactly offset in a function the next function was called (e.g....
View ArticleError in etl file generation (RebootCycle an Boot scenario) "Failed to gather...
Hello,I can't use the WPR except for scenario "general". I've got an error message when i want to capture reboot steps :I launch the tool, it restarts the system, i fill my credentials, WPR display...
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