PerfView and TraceEvent 3.1.1

Roll-up through 2023/04/04.

• Fixes a bug that resulted in significant degradation of performance in some apps due to very verbose events being enabled.
• Only refresh stack views when the filter/grouping criteria has changed.

PerfView and TraceEvent 3.1.0

Roll-up through 2023/03/31.

• Standardize all TraceEvent libraries to compile against netstandard2.0 only.
• Switch FastSerialization and TraceEvent projects to produce portable PDBs instead of Windows PDBs.
• Refactor PerfView dependencies to make them more explicit.
• Enable certificate revocation when contacting https endpoints.
• Convert ForceGC functionality to use built-in ETW capabilities and remove ICorDebug code from HeapDump.
• Cache the DIA class factory used for native symbol lookup.
• Dispose cached PDBs properly so that they aren’t locked on disk after use.
• Fix parsing of CTF metadata documents with out-of-order elements in LTTng traces.
• Several internal and surface area changes to Automated Trace Analysis capabilities.
• Enable opening of portable PDBs when running TraceEvent on Linux.
• Parse and consume new GC events, including a new GCSettings event.
• Fix native image PDB symbol resolution for diagsession files.
• Enable rundown event collection for GC and Tiered Compilation settings.
• Enable PerfView to capture the FileVersion fields for all .NET runtime DLLs consumed during trace capture and inject them into the trace.

PerfView and TraceEvent 3.0.8

Roll-up through 2023/02/24.

• Add a new collection option /UserCritContention and analysis view for analyzing work done while the UserCrit is held. This is interesting for UI apps that experience visual perturbances.
• Improvements to how TraceEvent and PerfView handle clean-up of ETW session handles.
• Movement of utility classes to the Microsoft.Diagnostics.Utilities namespace to avoid namespace collisions.
• Switch PerfView and TraceEvent to only use documented Win32 APIs. Remove OSExtensions.dll from PerfView and TraceEvent packaging.
• Remove InternalOnly checks in PerfView which limited features to users on Microsoft’s corporate network.

PerfView and TraceEvent 3.0.7

Roll-up through 2023/01/17.

• Fix EventCounter graphing in PerfView.
• Fix bug in processing of CTF traces from LTTng (Linux).
• Fix handling of Windows Handle events.
• Fix the process ID associated with VirtualMem events. This caused some stack views in some traces to contain multiple nodes for the same thread.
• Add a finalizer for TraceEventSource.
• Update to ClrMD 2.3.405304 for additional support of GC regions in heap snapshots.
• Add support for parsing and stack-ifying strace output (Linux).
• Add support for capturing LBR events.

PerfView and TraceEvent 3.0.6

Roll-up through 22/09/26.

• Add a dark mode theme to PerfView
• Remove the 10M node limit for ETW/dotnet-trace heap snapshots, allowing for larger heap snapshots without sampling.
• Expose TraceGC.GenerationCount to allow for discovery of additional generations (e.g. .NET Core).
• Update to ClrMD 2.2.343001 which contains fixes for capturing heap dumps of .NET Core processes that use regions.

PerfView and TraceEvent 3.0.5

Roll-up through 22/09/26.

• Add goto source support for portable PDBs with embedded source.
• Fix heap snapshot creation failures due to missing dependency.
• Add new user command to save CPU stacks as a CSV.
• Populate captured ETW providers in TraceEventSession instances created via session attach to fix CaptureStateOnSetFileName.
• Fix minimal rundown in PerfView to properly catch Runtime/Start events from .NET Core processes.

PerfView and TraceEvent 3.0.4

Roll-up through 2022/08/25.

• Add authentication support to PerfView for AzureDevOps, GitHub, and Git Credential Manager when downloading symbols and source. Big thanks to Paul Harrington for this!
• Update to build all projects with Visual Studio 2022.
• Update to validation of PDB files during symbol resolution when traces are not merged.
• Unseal AnalyzerIssue to allow for custom fields.
• Miscellaneous build and CI fixes.

PerfView and TraceEvent 3.0.3

Roll-up through 2022/08/05.

• Add a DelegatingHandler optional parameter to SymbolReader constructor to allow for authentication when downloading symbols and source code.
• Add new RuntimeSku value for Mono.
• Fix a bug that can cause an exception to be thrown during rundown.
• Check for alternate line endings when validating source code checksums.
• Fix failures when running SaveCPUStacks user command.
• Fix bugs related to the pinned object heap in GCHeapDumer.
• Add the number of heaps to the GCStats report for each process.
• Add new values for TieredPGO and ReadyToRun to TieredCompilationSettings.

PerfView and TraceEvent 3.0.2

Roll-up through 2022/07/01.

• Allow for complex filtering of events in the Events view. For example, only show CSwitch events for a particular thread: [(NewProcessID == 1024) || (OldProcessID == 1024)]. Documentation for how to use this feature is available in the PerfView Users Guide.
• Update to ClrMD 2.1. This provides lots of functional and performance fixes for GCHeap dumps.
• Expose a “Do not shorten frames copied from stack windows” option in the options menu.
• Properly sort numbers and dates in the Events view when using column sorting.
• Fix NGEN PDB generation for arm64 .NET Framework workloads.
• Fix discovery of NGEN images that need PDBs generated during trace zip.
• Update video links to point to newly archived tutorial videos.

PerfView and TraceEvent 3.0.1

Roll-up through 2022/05/30.

• New “Module Version Information” report in the “Advanced” group that displays version information for all loaded modules by process.
• Properly quote JSON keys for struct values from TraceLogging events.
• Propagate base TraceEventSource properties from TraceLog to TraceLogEventSource (e.g. pointer size, numprocs, session start/end times)
• Start versioning FastSerialization to address breaking API changes when multiple versions of TraceEvent are present.