PerfView and TraceEvent 3.1.24

Roll-up through 2025/08/26.

• Implement NuGet Central Package Version Management [#2262]
• Fix broken stacks warning for universal traces [#2268]
• Fix jitted code symbols in universal traces to show assembly names instead of memfd:doublemapper [#2269]
• Use themed background brush for menu and filter [#2272]
• Improve rendering and dark mode [#2274]
• Implement configurable symbol server authentication with /SymbolsAuth command line argument for PerfView and HeapDump [#2278]
• Add a themed dialog [#2276]
• Fix regression: "Goto Item in Callers/Callees" now accumulates across all threads [#2284]
• Fix parsing issues and add support for additional events to the Linux perf text file parser [#2286]
• Fix TraceLog live session RelatedActivityID/ContainerID corruption by preserving ExtendedData [#2285]
• NetTrace LabelList metadata overrides and metadata flushing [#2281]
• Fix NullReferenceException in ProviderBrowser.LevelSelected when deselecting level [#2289]

PerfView and TraceEvent 3.1.23

Roll-up through 2025/07/11.

• Fixed TraceEvent CaptureState API to support previously unsupported keyword configurations. [#2222]
• Added Exception Stacks view for .nettrace files to enhance exception diagnostics. [#2223]
• Corrected outdated documentation references to "GC Heap Alloc Stacks". [#2224]
• Fixed off-by-one error in P/Invoke buffer handling for Windows volume events. [#2227]
• Fixed broken links in the PerfView user guide. [#2225]
• Improved error handling by throwing when TdhEnumerateProviders fails, enabling better diagnostics. [#2177]
• Added AutomationProperties.Name to the Process Selection DataGrid for improved accessibility. [#2239]
• Fixed focus indicator visibility for hyperlinks in dark mode and high contrast themes. [#2235]
• Addressed NullReferenceException in Anti-Malware view. [#2233]
• Fixed WebView2 crash on close by implementing proper disposal pattern. [#2230]
• Added support for native AOT gcdumps, expanding compatibility with modern .NET workloads. [#2242]
• Fixed NVDA screen reader issue where Theme menu items did not announce selection state. [#2237]
• Extended PredefinedDynamicTraceEventParser to support dynamic events from additional sources. [#2232]
• Implemented MSFZ symbol format support in SymbolReader. [#2244]
• Removed usage of DefaultAzureCredential, simplifying authentication dependencies. [#2255]
• Added option to hide TimeStamp columns in the EventWindow View menu. [#2247]
• Fixed NVDA screen reader reporting incorrect list count for File menu separators. [#2257]
• Fixed unhandled exception when double-clicking in scroll bar area with no content. [#2254]
• Fixed universal symbol conversion for overlapping mappings. [#2252]
• Fixed TraceEvent.props to respect ProcessorArchitecture when RuntimeIdentifier is set. [#2249]

PerfView and TraceEvent 3.1.22

Roll-up through 2025/06/04.

• Added GC Heap Analyzer support for .nettrace files to enhance memory analysis workflows. [#2216]
• Introduced PredefinedDynamicTraceEventParser for known TraceLogging events, improving trace event parsing. [#2220]
• Enabled selection of process trees in the process selection dialog for multi-process analysis, allowing deeper inspection across related processes. [#2195]
• Implemented sorting for the Duration column in the process selection dialog using TotalDurationSeconds, improving usability. [#2194]
• Improved NetTrace parameter parsing for better command-line flexibility. [#2200]
• Fixed GetActiveSessionNames to handle ERROR_MORE_DATA, resolving session enumeration issues. [#2196]
• Fixed ObjectDisposedException when opening Net OS Heap Alloc Stacks, improving stability. [#2212]
• Fixed null reference exception in GenFragmentationPercent method, enhancing reliability. [#2211]
• Fixed TreeView auto-expansion when opening trace files. [#2218]
• Fixed StackViewer issue where "Set Time Range" reset "Goto Items by callees". [#2208]
• Fixed markdown table formatting when copying from the stack viewer. [#2203]
• Fixed TraceEvent NuGet package to exclude Windows-specific native DLLs. [#2215]
• Removed PDB generation for .NET Core assemblies using CrossGen, reducing build overhead. [#2202]
• Made symbol server timeout configurable and removed dead code in SymbolReader. [#2209]
• Changed help ribbons to use textblocks, enabling tab navigation. [#2201]

PerfView and TraceEvent 3.1.21

Roll-up through 2025/05/02.

• Change NetTrace format version support
• Add /OSHeapMaxMB to set a max size for OS heap sessions
• Implement Nettrace Support for Traces with Universal Providers
• Implement R2R Symbol Lookup for Linux Traces
• Fix NetTrace parsing for Start/Stop event names
• Fix IndexOutOfRangeException in ProcessGlobalHistory

PerfView and TraceEvent 3.1.20

Roll-up through 2025/04/01.

• Flamegraph and drill-in menu improvements
• Performance improvements around unhandled event dispatch
• Add configurable real-time delay in TraceLogEventSource
• Don't queue another flush during a real-time ETW session if one is already in-process
• Allow configuration of rundown providers for real-time EventPipe sessions
• Fix stack handling for NetTrace V4
• Add multi-line view for events viewer
• Misc accessibility fixes

PerfView and TraceEvent 3.1.19

Roll-up through 2025/01/30.

• Added missing time information in the Raw XML View for GCStats.
• Updated activity computation logic to support OpenTelemetry events.
• Changed timestamp values to use QPC time based on UTC for Relogger.
• Fixed issues with report command handling.
• Addressed various POH-related issues.
• Implemented file-size limitation for rundown using an ETW-based approach.

PerfView and TraceEvent 3.1.18

Roll-up through 2024/12/11.

• Fixed perfcollect install script on Azure Linux 3.
• Updated System.Text.Json to address dotnet/announcements#329.

PerfView and TraceEvent 3.1.17

Roll-up through 2024/11/08.

• Numerous accessibility fixes to PerfView. This includes switching out the previous web browser plugin to use WebView2.
• Breaking changes to FastSerialization to ensure that only expected types are deserialized. This addresses potential vulnerabilities during deserialization of untrusted input. Details at #2121.

PerfView and TraceEvent 3.1.16

Roll-up through 2024/10/11.

• Performance improvements to DynamicParser.
• Fixed GetFileNameWithoutExtensionNoIllegalChars to only trim known file extensions.
• Fixed a memory leak when processing EventPipe traces.
• Added support for private/in-process loggers.

PerfView and TraceEvent 3.1.15

• Fixed an issue where /buildLayout resulted in an error when the user hadn't previously run PerfView on the machine.