X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/502c1fb7b48f799d36d2ee04d978b3bb54fb0d00..c1279242e832ddcc53bf8ceb0e112035f64a844d:/ChangeLog diff --git a/ChangeLog b/ChangeLog index b28bb47032..769705013c 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,13 +1,29 @@ SimGrid (3.6) unstable; urgency=low MSG + * New function MSG_comm_get_status(). MSG_comm_test() and MSG_comm_testany() + only say if a communication is finished, no matter whether it succeeded or + failed. You can call MSG_comm_get_status() to know the status of a finished + communication. + * New function MSG_task_dsend() to send a task and detach it. When a + communication is detached, you are never notified of its success or failure + and the memory is released automatically once it is finished. This function + is useful when you don't care about the end nor the success of a + communication. * Change the prototypes of action replay. Sorry for inconvenience, - but this is really more efficient this way. + but this is really more efficient this way (and to adapt your code, + you just have to fix the initialization, that shouldn't be too long) + * Kill the braindead MSG_task_refcount_dec() function. I guess nobody + ever managed to do anything useful with it. + * New function MSG_comm_testany(). Similarly to MSG_comm_waitany(), it + takes a dynar of communications. It returns immediately and gives the + index of a finished communication (if any). + * New example: a basic implementation of the Chord P2P algorithm. SURF * New model for multi-core CPUs. You can now use the core attribute to precise the number of cores of a host. This is a basic model. Every - process running on the host receive at most the power provided in + process running on the host receives at most the power provided in the DTD (throughput<=power). Total throughput of process cannot exceed power * num_cores. * New peer tag. This peer tag creates a tiny AS comprising a host and a @@ -19,17 +35,41 @@ SimGrid (3.6) unstable; urgency=low into a Vivaldi routing model (based on the rule-based model). This allows to combine Vivaldi based latencies with last-mile platforms. - Simix - * Completely rewrote this module to allow parallel execution. + SIMIX * Introduce a new context factory "raw", highly inspirated from the - context factory, but using manually crafted functions in assembly to + ucontext factory, but using manually crafted functions in assembly to do the work in an efficient manner. + * Allow to change the used context factory at run time, not only at + compilation time. Use --cfg=contexts/factory:raw for maximal speed. + * Add an option --cfg=contexts/stacksize:N to set the stack size of the user + contextes at runtime (only with raw contexts or ucontexts). + * Completely rewrote this module to allow parallel execution of user + processes. Use --cfg=contexts/nthreads:N to execute user processes + with N parallel threads (the default is 1, meaning no parallelism). + * Allow to decide dynamically between sequential and parallel modes. + When nthreads > 1, you can use --cfg=contexts/threshold:P to run the user + processes in parallel only when their number is greater than or equal to P + (the default is 2). + * Added a check for NaN of IEEE754 infinite in the double entries of + the smx_user.c file XBT + * New command line option: if you pass --cfg=verbose-exit:0, SimGrid + won't output the state of processes when interrupted with Ctrl-C * Add a new function xbt_dynar_to_array that transforms a dynar into a NULL-terminated array. This may solve backward compatibility issues - due to the change to return type of SD_Simulate. See also: + due to the change to return type of SD_simulate. See also: http://lists.gforge.inria.fr/pipermail/simgrid-user/2010-December/002206.html + * Add new macros with variable number of arguments. + - in xbt/log.h: XBT_DEBUG, XBT_VERB, XBT_INFO, etc. + - in xbt/asserts.h: xbt_assert + - in xbt/cunit.h: xbt_test_{add,fail,assert,log} + - in xbt/ex.h: THROWF and RETHROWF. + Define XBT_USE_DEPRECATED if you want to use the old numbered macros like + INFO1, INFO2, etc. + * Change xbt_die() to accept a format string with arguments, just like printf. + * New data structure: xbt_lib_t, like a dict but more general and with better + memory handling. INSTR * New configuration options @@ -39,7 +79,8 @@ SimGrid (3.6) unstable; urgency=low * XBT logging makes tracing error checks easier, new root log hierarchy: instr * New TRACE_user_link_variable interface: User provides the name of the link and the tracing variable to attach to it - * the declaration of tracing categories must be done after the environment creation + * the declaration of tracing categories must be done after the environment + creation * simpler tracing interface, just one way to declare categories TRACE_category or TRACE_category_with_color, it is up to you * links in the trace file are again identified by their names @@ -49,6 +90,26 @@ SimGrid (3.6) unstable; urgency=low these options generate traces that are suited to gantt-charts, such as the space-time view of Paje * The experimental option tracing/msg/volume is deprecated its functionality may be reincorporated if needed + * Buffering + The tracing generates a trace file with unordered timestamped events, + because of the way the core simulator (surf) works. A script available + at the tools directory (fix-paje-trace.sh) can be used to put the events + in order. We have changed the tracing so it can generate ordered timestamped + events in the final trace, but depending on the simulator (and how much time + is simulated) that can lead to a huge memory utilization. It is desactivated + by default, but it can be activated using the --cfg=tracing/buffer:1 switch. + + Build Infrastructure + * Define a SIMGRID_VERSION macro in simgrid_config.h. + - We are trying hard to keep the API stable, but it may happen that + some things change (we're a research project after all, not a + nuclear plant operating system). If such things should happen, you + could rely on that macro to adapt. + - current value: 30600 for 3.06.00, aka 3.6 + * Define macro MAKE_SIMGRID_VERSION(major, minor, patch) to help building + a number that can be compared with SIMGRID_VERSION. + * Add a build option -Denable_debug (set to ON by default): when set to OFF, + assertions and verbose/debug logging events are disabled at compile time. -- Da SimGrid team