SimGrid (3.12) NOT RELEASED; urgency=low
+ Build System
+ * Require g++ v4.7 at least to not speak prehistorical C++.
+ * Require Boost 1.48 (for signal2 component).
+ * Tracing is now always enabled (no way to turn it out)
+ * Remove GTNetS. It was not working anyway.
+ * Move headers around to sort them out on installed systems:
+ - instr/instr.h -> simgrid/instr.h
+ - instr/jedule/* -> simgrid/jedule
+ - simdag/datatypes.h was removed
+ - simdag/simdag.h -> simgrid/simdag.h
+ - msg/datatypes.h was removed
+ - msg/msg.h -> simgrid/msg.h
+
cMSG:
* Interface improvement:
- Rename MSG_host_is_avail(h) to MSG_host_is_on(h)
+ - Sanitize the interface in MSG_task_ module:
+ - Merge two functions that were close enough but misleading:
+ set_compute_duration(t) -> set_flops_amount(t)
+ get_remaining_computation(t) -> get_flops_amount(t)
+ - set_data_size(t) -> set_bytes_amount(t)
+ get_data_size(t) -> get_bytes_amount(t)
- Massive cleanups in the functions related to the energy
+ - MSG_host_get_pstate_number() -> MSG_host_get_nb_pstates()
+ - New: MSG_host_get_pstate()
+ * New example:
+ - msg/energy/onoff: switching hosts on and off
jMSG:
* Interface improvement:
- Rename Host.isAvail() to Host.isOn()
-
+ - Rename Process.currentProcess() to Process.getCurrentProcess()
+ - Rename Task.setDataSize() to Task.setBytesAmount()
+ - Merge Task.getRemainingDuration() and Task.getComputeDuration() into Task.getFlopsAmount()
+ * Bug fixes:
+ - #18874: Actually allows the GC to reclaim tasks
+
SIMIX:
* New functions
- SIMIX_process_throw: raises an exception in a remote process
- * Refactoring: Separate submodules
+ * Refactoring: Separate sub-modules
- libsmx: the public interface, as libc in a real system
- popping: the strange dance that converts a user request into a kernel handling
- - smx_context_*: the virtualization mechanisms that embeed the user code
+ - smx_context_*: the virtualization mechanisms that embed the user code
- smx_*: the handling of each simcalls
+ * Interface cleanup:
+ - simcall_host_set_power_peak_at -> simcall_host_set_pstate
* Rename smx_action_t into smx_synchro_t, making explicit that these
- things are used to synchronize processes with their environment.
+ things are used to synchronize processes with their environment.
For example, a communication is a sort of synchronization involving
the communicating processes (that may block until the exchange) and
the platform. The same can be said from computations, etc.
-
- SMPI:
+ * Bug fixes:
+ - #18888: segfault when a process ends before its kill_time
+
+ SMPI:
* New functions
- - Onesided early support for : MPI_Win_(create, free, fence, get_name, set_name, get_group), MPI_Get, MPI_Put, MPI_Accumulate, MPI_Alloc_mem, MPI_Free_mem.
+ - Onesided early support for : MPI_Win_(create, free, fence, get_name, set_name, get_group), MPI_Get, MPI_Put, MPI_Accumulate, MPI_Alloc_mem, MPI_Free_mem.
- MPI_Keyval*, MPI_Attr* functions, as well as MPI_Comm_attr*, MPI_Type_attr* variants (C only, no Fortran support yet)
- MPI_Type_set_name, MPI_Type_get_name
- MPI_*_c2f and MPI_*_f2c functions
- MPI_Info_* functions (beware, get_nthkey may not follow the insertion order)
- MPI_Pack, MPI_Unpack and MPI_Pack_size functions
- Activate a lot of new tests from the mpich 3 testsuite
- * Features
+ * Features
- Constant times can be injected inside MPI_Wtime and MPI_Test through options smpi/wtime and smpi/test
- - InfiniBand network model added : Based on the works of Jerome Vienne (http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf )
+ - InfiniBand network model added : Based on the works of Jerome Vienne
+ http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf
- When smpi/display_timing is set, also display global simulation time and application times
- Have smpirun, smpicc and friends display the simgrid git hash version on --git-version
* Collective communications
- SMP-aware algorithms are now dynamically handled. An internal communicator is created for each node, and an external one to handle communications between "leaders" of each node
- MVAPICH2 (1.9) collective algorithms selector : normal and SMP algorithms are handled, and selection logic is based on the one used on TACC's Stampede cluster (https://www.tacc.utexas.edu/stampede/).
- Support for Rabenseifner Reduce/Allreduce algorithms (https://fs.hlrs.de/projects/par/mpi//myreduce.html)
- * Replay
+ * Replay
- Replay now uses algorithms from wanted collective selector
- Replay can be used with SMP-aware algorithms
- Memory occupation of replay should now be contained (temporary buffers allocated in collective algorithms should be shared between processes)
- Replay can now replay several traces at the same time (check examples/smpi/replay_multiple example), to simulate interactions between several applications on a given platform. User can specify the start time of each instance. This should also allow replay + actual applications to run.
- * Bug fixes
+ * Bug fixes
- [#17799] : have mpi_group_range_incl and mpi_group_range_excl better test some corner cases
- Correctly use loopback on fat-tree clusters
- Asynchronous small messages shouldn't trigger deadlocks anymore
+ * Energy/DVFS cleanup and improvement
+ - smpi_set_host_power_peak_at() -> smpi_set_host_pstate()
+ - new: smpi_get_host_pstate()
SURF
- * Bug fixes
+ * Bug fixes
- "Full" network optimization flag was broken since Surf++
- Better handling of precision flags in maxmin
- Fix bug causing sometimes "Impossible" errors
- Properly pass cluster properties to included hosts
* Improvement of the Energy plugin.
- Always update the consumption before returning that value
- - New property: watt_off to denote the disipation when the host is off
+ - New property: watt_off to denote the dissipation when the host is off
+ - New functions getWattMinAt and getWattMaxAt to retrieve the
+ dissipation of pstates that we are not currently at.
+ * Java: class NetworkLink renamed to Link
+ * New function: simcall_process_get_kill_time()
+ * Massive rename s/workstation/host/
+ - That's intrusive, but that's good for the project consistency. Sorry.
+ - Change config option "workstation/model" into "host/model"
XBT
* New functions
- - Add a xbt_heap_update function, to avoid costly xbt_heap_remove+xbt_heap_insert use
+ - Add a xbt_heap_update function, to avoid costly xbt_heap_remove+xbt_heap_insert use
- Add a xbt wrapper for simcall_mutex_trylock (asked in [#17878])
- Add two new log appenders : rollfile and splitfile. Patch by Fabien Chaix.
-
+ MC
+ * The model checker now runs as a separate process.
+ * The model checker runs must now be launched with the new simgrid-mc program.
+ * Record/Replay: the MC can display a textual representation of a path in the
+ execution graph. It can then be replayed outside of the model checker.
-- $date Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
