v0.6

This is a feature delivery release

Compared to the previous release, the main added changes are:

• Feature (global): efficient printf-like logging (supersedes markers).
  • nanosecond logging performance
  • format arguments can be searched and graphed
• Feature in the viewer: some exports have been added
• Important fix: instrumentation crash under stress
• Important fix: correctness of multi-resolution graphs

Behavior change / compatibility break

• Viewer: the marker window has been replaced with the log window, which generalizes markers and provides more features
• Viewer: old stored records will not be readable anymore (incompatibility due to somes changes for the logs)
• Instrumentation: old viewers are not compatible, due to transport header change.
• Instrumentation: plMarker APIs are deprecated.
  • they are currently wrapped on plLogWarn function and will be removed soon

New features

• Global: efficient printf-like logging
  • nanosecond logging performance
  • format arguments can be searched and graphed
  • a comparison with Nanolog and spdlog is provided
• Viewer: some exports available
  • anywhere with ctrl-P for screen capture
  • in main menu bar for Chrome Trace Format (JSON)
  • in text and log windows for a text export
  • in plot windows for CSV export

Fixes and improvements

• C++ instru: remove a critical flaw in the event collection mechanism which could lead to a crash under stress (thanks @gpascualg for the report with details)
• Python instru: the filename of the exception source is now provided in the log text, along with the line number
• Viewer: reworked the computation of the multi-resolution of the graphs. Previous version was broken and provided poor visual results
• Viewer: fix the profiling applied always on a particular thread, for threads without provided names (thanks @jojado8408 for reporting)
• Code cleaning: fix "issues" highlighted by the tool include-what-you-use
• Code cleaning: fix "issues" highlighted by the static analysis tool CodeChecker
• Code cleaning: remove warnings when compiling under Windows with the flag /W4 /permissive- (thanks @gpascualg and @BrodyHiggerson)

Palanteer v0.5

This is a feature delivery release

Compared to the previous release, the main added features are:

• Multi-stream (or multi-process) recording
• Automatic C++ instrumentation (GCC only)

Behavior change / compatibility break

• Viewer: external string lookups are now per record (they were previously per application).
• Viewer: old stored records will not be readable anymore (incompatibility due to the added stream informations)
• Instrumentation: old viewers are not compatible, due to transport header change.

New features

• Server and Viewer: add support for multistream (or multiprocess) records
  • Server: support for multiple socket connections and multistream recording
  • Viewer: add the configuration menu for the mono/multi stream
  • Viewer: file dialog supports multi selection with highlight
  • Viewer: record options are displayed per stream
• Viewer: enable Dear ImGui keyboard navigation
• Instrumentation: support of automatic C++ function instrumentation (GCC only)
  The external string lookup is now independent for each record, and covers also this feature.
• Python: add support for Python 3.10 packages

Fixes and improvements

• Viewer: lock use can now be graphed for all threads (menu on the lock name)
• Viewer: in Text view, all events with dates are now taken into account for navigation
• Viewer: fix a crash when asking an histogram for a "lock use" scope
• Viewer: fix persistence of graphs between launches
• Viewer: fix a crash when the saved layout is not matching the record thread names
• Viewer: fix the display of the used size of records (now 64 bits size)
• Server: more robust handling of duplicated thread names
• Server: fix a crash when getting memory details with big quantity of non released allocations
• Python: fix an incorrect event logging sequence when both using coroutines and tracing C calls
• Python instru: disable an annoying warning on Windows
• C++ instru: collect the used language, the context switch collection state and the auto instrumentation state
• C++ instru: waiting for server connection is now a configurable timeout, no more a binary state
• C++ instru & server: more robust short date handling
• C++ instru: more robust initialization
• C++ instru: threads (standard or virtual) can be declared before service initialization and are persistent across multiple service initialization (thanks @BrodyHiggerson for the use case)
• C++ instru: reduced disabled Palanteer include cost on windows with USE_PL=0 (now a few millisecond, as for Linux)
• Scripting: improve support of external strings, now applied also on the event specification

Palanteer v0.4

This is a bug fix release

Behavior change / compatibility break

• None

New features

• Viewer: add support for high DPI

Fixes and improvements

• Python instrumentation: fix a crash when tracing C calls
• Viewer: fix a crash in some cases in the file dialog window when playing with sorting
• C++ instrumentation: added printf-like API for plDeclareVirtualThread and plDeclareThreadDyn
• Documentation updated
• Documentation: upgraded Markdeep
• Viewer: upgraded Dear ImGui

Palanteer v0.3

This is a general maintenance release

Compared to the previous release, the main changes are:

• Addition of the 'compact application model' taking advantage of 32 bits architectures to reduce the exchanged data to 12 bytes per event (instead of 24 bytes)
• 10% speed gain on server side (compression library update)

Behavior change / compatibility break

• Viewer: old stored records will not be readable anymore (break in 6a1bcdf)
• Instrumentation: old viewers are not compatible, due to added options (see below). But the current viewer accept older instrumentation libraries.

New features

• Instrumentation: add support for a hash 'salt', useful when using 32 bits hash to remove potential collisions.
• Instrumentation: add support for the 'compact model', allowing 50% reduction of used bandwidth (i.e. 12 bytes per event) between client and server, under some instrumentation constraints
• Python: add interface to profile Python modules (thanks @Victor333Huesca!)
• Scripting improved API to handle the case of externally launched programs (thanks @LotemAm!)
• Viewer: application icon added under Windows

Fixes and improvements

• Viewer: display of all instrumentation options in the 'Record view'
• Instrumentation: Added the missing "group" version of plDeclareThread
• Server: add the missing control of the instrumentation protocol version, to detect client-server incompatibilities
• Documentation updated
• Viewer: application icon added under Windows
• Server: upgraded compression library zstd to benefit from the recent speed improvement for low compression ratios.
• Viewer: upgraded Dear ImGui and stb_image.h

Palanteer v0.2

This is the first Palanteer official release

Compared to the initial commit, the main changes are:

• Virtual/userland thread support
• Stability fixes (one of them critical)
• Improved packaging.

Behavior change / compatibility break

• Viewer: old stored records will not be readable anymore (break in 8e9e9ac)
• The Python instrumentation does not log anymore the C calls by default.
  Indeed, wildly used built-in function (like list "append") may be very heavy and are not always necessary

New features

• Viewer: record catalog improvement: total size per app is displayed and a menu to collapse/open alls app was added
• Server: 10% faster event processing on server side by disabling specific assertions in containers in release mode.
• Virtual/green/userland thread support in C++, and the equivalent asyncio/gevent/greenlet in Python
• Improved CMakeFile.txt (thanks @bareya, @RichieSams!)
• Python packages are now wheels
• Python code is now formatted for PEP8 (with the tool "black")

Fixes

• Server: fixed the lock event automata (a not taken lock event after a wait begin event was not ended as it should)
• Viewer: fixed the search on Windows (strcasestr exists but does not work properly)
• Viewer: fixed the behavior of clicking on items in the text view
• Viewer: fixed the plot and histogram layout persistency
• Server: filter problematic characters for a file in the sent application name
• Server: improve robustness and behavior of the server connection automata
• Server: improve robustness of the server against corrupted data sent from instrumentation
• Instrumentation; fixed a major stability issue (event corruption) in the collection mechanism
• Viewer: fixed proper quitting of the viewer
• Instrumentation: fixed missing deactivated APIs (thanks @Lnsrini, @learn-more)
• Tools: fixed missing API names in the tool extStringCppParser.py
• Documentation improvement (thanks @ajweeks!)