![]() We wrote several posts on troubleshooting Windows performance issues using the Xperf utility as part of our Xperf Xpert series:īecoming an Xperf Xpert: The Slow Boot Case of the NetTCPPortSharing and NLA Servicesīecoming an Xperf Xpert Part 2: Long Running Logon Scripts, Inconceivable!īecoming an Xperf Xpert Part 3: The Case of When Auto “wait for it” Logon is Slowīecoming an Xperf Xpert Part 4: What Did the WDIService Host Ever Do To You?īecoming An Xperf Xpert: Part 5 Gaps of Time For Explorer.exe There was no built-in UI and everything was done from a command prompt using xperf.exe or xbootmgr.exe. If you are familiar with the older versions of the Windows Performance Toolkit obtained from the Windows 7 SDK, you know that obtaining traces with Xperf was, at times, very complex. Knowing which providers and stackwalking flags to enable was a struggle all together. The toolkit, itself, has a subset of tools that produce in-depth performance profiles of Windows operating systems and applications. One of the great things about the Windows Assessment and Deployment Kit is the Windows Performance Toolkit. If so, uncheck the “NGENPDB” in the symbols paths.Īfter setting up the paths, select menu “Trace ➤ Load Symbols”.First published on TechNet on Mar 22, 2013 But if the recording file is too large, and the computer is not powerful enought, the computer may stuck at loading symbols. ![]() Windows Performance Analyzer will automatically add it. Windows Performance Recorder also automatically saves system libraries debug symbols in a “NGENPDB” directory. First configure the symbols paths to include target process pdb file via menu item “Trace ➤ Configure Symbols Paths”. The Commit Stack does not loads debug symbols by default. Sometimes, it is useful to zoom into a specfic time range, such as a memory surge to see the impacting allocations. However, I find out that it is hard to locate the leaf nodes when dragging the Commit Stack column to the left. The lines are automatically grouped by the columns that on the left of the yellow vertical bar. New columns can be added by right click the existing column header. The cumulative sum of all allocation during the selected time interval. This size adjusts based on the selected view port.The Impacting Size value will be zero if all memory allocated by a process is freed by the end of the visualized interval in WPA. The size of outstanding allocations or the size difference between the start and end of the selected time interval. The timestamp of when memory was allocated. The call stack that shows the code path leading to memory being allocated. The name of the process that performs memory allocations through VirtualAlloc. The key columns of interest are the following ( source): Column Find the process in the table and apply “Filter to Selection” in the right click context menu. It can help us to find out who has allocated memories but not return them.įirst filter the the result to only show the target process. VirtualAlloc Commit LifeTimes tracking records all the heap memory allocation, when they are allocated and freed. Open the saved report file in Windows Performance Analyzer.Įxpand the Memory in the left side bar and drag “VirtualAlloc Commit LifeTimes” chart to the Analysis tab. Open the Report in Windows Performance Analyzer Reactivate Windows Performance Recorder and click the “Save” button. It will complain there is no enough memory. ![]() On my 16G memory machine, Windows Performance Analyzer seems cannot load too long recording. Launch the process for a while, like 3 minutes. Check “Heap usage” and “VirtualAlloc usage” in the resource analysis. Start Windows Performance Recorder from Start Menu. ![]() Now cargo build -release will also creates a pdb file, which contains the debug symbols. In Rust, this can be enabled by adding debug = true to Cargo.toml A simple way is starting an admin PowerShell using keyboard shortcuts Win+x a. The command requires administrator permission. Pay attention to the executable name “ckb.exe” used in the command. Enable Tracing the Target Processįor example, to enable tracking ckb reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ckb.exe" /v TracingFlags /t REG_DWORD /d 1 /f It’s sufficient to only install the component “Windows Performance Toolkit” 2. The windows build version can be checked by running “winver” via Win+r. Install Windows Performance Recorder and Analyzerĭownload and install ADK from here. The article mainly refers Exercise 2 - Track User Mode Process Allocations | Microsoft Docs.
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