Version 3.5.0

Added

• Asynchronous support for classic LeWI
• Several SMT enhancements for LeWI policies
• Allowed to override lewi classic/mask with --lewi-affinity
• TALP POP metrics now includes experimental OpenMP hybrid metrics
• TALP global region is now exposed in the API
• TALP-Pages, a new tool for Continuous Performance Monitoring in static HTML pages
• Add flag --talp-region-select to filter active regions
• SLURM integration via dlb_taskset
• CMake config for other projects to link with DLB
• Several examples and documentation reworked
• DLB version information can be accessed though the API

Changed

• --talp-summary has been simplified and now pop-metrics also includes raw
  metrics if using an output file, and process metrics now includes node
  identifiers
• TALP now only stores monitoring regions in shared memory if
  --talp-external-profiler is set
• TALP output structure has been reworked
• TALP main region is now called "Global"

Fixed

• LeWI mask now correctly supports threads blocked in MPI calls while pinned to
  multiple CPUs
• Add sanity checks for hardware counters in TALP
• Print JSON and CSV files in the proper locale

Deprecated

• --talp-summary values for pop-raw and node are deprecated
• TALP output format XML is now deprecated
• --talp-regions-per-proc flag is deprecated for a new experimental
  --shm-size-multiplier flag
• Several fields in dlb_monitor_t are now deprecated
• Several fields in dlb_pop_metrics_t are now deprecated
• DLB_MonitoringRegionGetMPIRegion deprecated in favor of
  DLB_MonitoringRegionGetGlobal
• DLB_Stats_GetCpuStateIdle functionality no longer provided
• DLB_Stats_GetCpuStateOwned functionality no longer provided
• DLB_Stats_GetCpuStateGuested functionality no longer provided

Version 3.4.1

Fixed

• Fix an error in the shared memory alignment that was causing
  segmentation faults when compiling with -march=native
• Avoid registering role shifting callbacks for other non-related
  OpenMP thread managers
• Update examples with supported options
• Fix some parameters in the Fortran'08 interface
• Be more resilient if PAPI fails to initialize
• Enhance compatibility in other systems
• Quote string names in csv files
• Several other minor fixes

Version 3.4

Added

• PAPI support for TALP metrics
• libdlb_mpic.so and libdlb_mpic_*.so are C MPI only libraries
  that may be built using --enable-c-mpi-library at configure time
• Functions to reset, stop, start and report monitoring regions now
  accept the special argument DLB_MPI_REGION for the implicit region
• Function DLB_TALP_QueryPOPNodeMetrics for third-party applications
  to query pop metrics. Requires --talp-external-profiler.
• Named barriers and several API functions to manage them
• Added --lewi-barrier and --lewi-barrier-select to fine-tune
  which barriers activate LeWI.
• Added --lewi-color to select specific key only for LeWI

Changed

• libdlb_mpif.so and libdlb_mpif_*.so are no longer built by default,
  only if --enable-fortran-mpi-library is set at configure time
• Flag --quiet now only suppresses INFO and VERBOSE, added new flag
  --silent to keep the old functionality to suppress all messages
• Refactor DLB_TALP_CollectNodeMetrics to
  DLB_TALP_CollectPOPNodeMetrics and add communication efficiency
• TALP now appends to CSV files if they already exist

Fixed

• Fixed wrong generated code for MPI_Initialized and MPI_Finalized

Deprecated

• --lewi-ompt no longer accepts "mpi" nor "aggressive" as values.
  Automatic LeWI via synchronization calls is now done with
  --lewi-mpi-calls for MPI and --lewi-barrier or
  --lewi-barrier-select for DLB Barriers.

Version 3.3.1

Fixed

• Fixed wrong generated code for MPI_Initialized and MPI_Finalized

Version 3.3

Added

• Free agent and Role-shift OMPT thread managers to support LeWI with both
  implementations
• Flag --ompt-thread-manager to select which OpenMP implementation to use
• MPI Fortran 2008 bindings
• TALP flag to generate file in different output formats --talp-output-file
• New TALP collective functions to gather and compute metrics:
  DLB_TALP_CollectPOPMetrics and DLB_TALP_CollectNodeMetrics

Changed

• libdlb_mpi.so and libdlb_mpi_*.so have now both C and Fortran MPI symbols

Fixed

• Fixed DROM pre-initialization if child had empty cpuset affinity
• Fixed --lewi-max-parallelism
• Fixed several TALP bugs
• Fixed some finalization errors during MPI finalize
• Fixed cpuset parsing when provided a non-contiguous mask

Version 3.2

Added

• Flag --verbose to enable all verbose modes
• Flag --talp-summary=pop-raw to print raw POP metrics
• Flag --lewi-respect-cpuset to allow LeWI to use CPUs not yet registered

Changed

• DROM can now steal all CPUs from one process
• DROM can now inherit a subset of CPUs from other process
• DLB_DROM_SetProcessMask to oneself does not longer require a DLB_pollDROM
• DLB_Lend in OpenMP applications now invokes the OpenMP runtime to change
  the number of threads

Fixed

• Fixed TALP regions enabled or registered only on some processes
• Fixed minor option parsing

Version 3.1

Added

• New --lewi-mpi-calls value: none
• New MPI runtime version check during initialization
• Experimental meson build files
• Add better support for getting/setting process mask from own process

Changed

• Enable --barrier by default
• Rename --lewi-mpi to its opposite: --lewi-keep-one-cpu, and
  change the default behavior
• Rename --talp-summary=app to --talp-summary=pop-metrics and
  make it the default value
• Rename TALP to Tracking Application Live Performance
• CPU priority now follows a better topology order
• Properly clean up shared memory during initialization

Fixed

• Fixed several TALP issues
• Improves support for OMPT
• Proper shared memory clean up if running under dlb_run

Deprecated

• Python viewer scripts are no longer installed

Version 3.0

Added

• New TALP module: Tracking Application Low-level Performance
• TALP Monitoring Regions for user-defined regions
• Allow processes to attach to / detach from the Barrier module
• Improve the verbose messages for some modules
• Allow partial instrumentation of some events
• Man pages for DLB commands

Changed

• DLB library now always prints to stderr, DLB binaries may still use stdout
• Dropped support for binary mask old format 1000b in favor of 0b0001
• DLB_ARGS variable now takes precedence over DLB_Init argument

Fixed

• Some callbacks not being invoked when the action involved some successful
  actions and some others not allowed
• Several DROM inconsistencies
• Several minor fixes
• Minor documentation fixes

Version 2.1

Added

• OMPT full support
• Add function to API: DLB_UnsetMaxParallelism
• New binary dlb_run to preinit masks, needed for OMPT applications
• Improved dlb_shm --list output
• New verbose option affinity to print hardware information
• Add option --quiet to silent all info and warning messages
• New test mechanism based on LIT

Changed

• DLB_Lend does no longer keeps the current CPU
• PreInit service now handles the timeout if the synchronous flag is provided
• DROM now accepts registering and setting empty masks
• Verbose options now affect all library versions

Fixed

• Added some mechanisms to clean shared memories when the program aborts
• Fixed several race conditions with the asynchronous messages
• Fixed an issue where --lewi-affinity was being ignored
• Adapt Fortran headers to be fixed-form compatible

Version 2.0.2

Minor hotfixes