Version 2.0.1

Minor hotfixes

Version 2.0

Added

• Callback system
• API for subprocesses
• New interaction mode choice (synchronous as it was before, or asynchronous)
• Doxygen HTML and man pages documentation
• Test coverage support
• OMPT experimental support

Changed

• API reworked
• A petition of a CPU now registers the process into a CPU petition queue. If this CPU
  becomes available, DLB can schedule which process will acquire it
• A petition of an unspecified CPU registers the process into a global petition queue,
  this queue has less priority than the CPU queue
• DLB acquire now does not schedule because it forces the acquisition, DLB Borrow does
  scheduling but only looks for idle CPUs and never creates a CPU request
• DLB options print format reworked, DLB_ARGS is now used to pass options to DLB.
• Fortran Interface is now a Fortran include with ISO C bindings.
• Shared Memory synchronization mechanism is now managed using a pthread spinlock
• DROM services now use the same shmem handler so no need to call DLB_Init and DLB_DROM_Init
• DROM services Get/Set process mask are now asynchronous functions

Fixed

• Test suite now follows a Unit Testing approach and does not need undocumented external tools
• Several minor bugs
• PreInit service now correctly handles environment variables and allows forks

Deprecated

• DLB_MASK is no longer used, only registered CPUs may be used by other processes
• DLB_DROM_GetCpus service has been removed
• LB_OPTION type of environment variables is deprecated

Version 1.3.2

Minor hotfixes

Version 1.3.1

Minor hotfixes

Version 1.3

Added

• Shared Memory consistency checks upon registration
• The binary dlb_taskset can now be used to launch processes under DLB
• Service DLB_Barrier to perform a barrier between all processes in the node
• DLB Services now return an error code
• New User Option LB_PRIORITY to manage how CPUs are distributed according to HW locality
• Add services for DROM to PreInit and PostFinalize to manage process that will fork/exec
• Add services to check if the process mask needs to be changed

Changed

• Refactor policy based Shared Memory into two general purpose cpuinfo and procinfo
• DROM interface is now considered stable. External processes can manage the CPU ownership of DLB processes
• DLB options are now parsed through the environment variable DLB_ARGS

Fixed

• Several minor bugs

Deprecated

• Signal handler feature is no longer supported

Version 1.2

Changed

• Improved User Guide
• Improved configure script and macros

Fixed

• Compatibility with gcc6
• Compatibility with icc17
• Compatibility with C11 standard
• Several minor bugs

Version 1.1

Added

• Policy Autonomous Lewi Mask to micro-manage each thread individually
• DLB services to init/finalize without MPI support
• DLB services to enable/disable or mark a serial/parallel sections of code
• DLB service to modify User Options during program execution
• New library independent from MPI
• Binary dlb_shm to manage Shared Memory from CLI
• Binary dlb_taskset to manage processes' mask from CLI
• BG/Q support
• Add LB_MASK environment variable to specify a DLB_MASK common to all processes
• Experimental implementation of DLB_Stats interface
• Experimental implementation of DLB_DROM interface
• Signal handler feature to clean up DLB on termination
• In-code Doxygen documentation
• User guide using Sphynx generator
• Distributable examples

Changed

• Replace IPC with POSIX Shared Memory
• Replace Shared Memory synchronization mechanism from semaphores to pthread mutexes
• Shared Memory creation is now decentralized from rank 0 and it will be created when necessary
• Shared Memory internal structure reworked to host information about ownership and guesting of CPUs
• CPUs from DLB_MASK can guest any process, but they will not have an owner
• Improve support for detection of Shared Memory runtimes

Fixed

• Compatibility with gcc 4.4 and 4.5
• Compatibility with MPI-3 standard
• Fotran interfaces now use the correct types
• Several minor bugs

Version 1.0

Added

• DLB Interface
• MPI Interception Interface
• User options configured by environment variables LB_*
• Lend When Idle algorithm implementation
• DPD
• Extrae instrumentation
• Paraver configs for DLB events
• Inter-Process Communication (IPC) Shared Memory
• Inter-Process Communication (IPC) Sockets
• Thread binding interface
• LeWI policies to support SMPSS and OpenMP
• LeWI mask policy to support OmpSs
• RaL and PERaL policies for redistribution of resources
• HWLOC optional dependency to query HW info
• Scheduling decisions based on HW locality
• Binary dlb