-SimGrid (3.1.1) unstable; urgency=low
+SimGrid (3.3-cvs) unstable; urgency=low
- GRAS:
+ OVERALL CHANGES:
+
+ * JAVA BINDINGS for MSG (you dreamt of them? We made them)
+ [Malek Cherier & Mt]
+
+ * Introduce the SIMIX module: factorize code between MSG and GRAS.
+ [Bruno Donassolo]
+
+ Until now, GRAS were using MSG as an interface to SURF. It was
+ quite difficult because both interface have several differences
+ (MSG channels vs GRAS sockets were the most notable point).
+
+ This also opens the gate to SMPI (which should occur soon) and speed
+ up simulations by to 40% (even if it were not the main goal).
+
+ **************************************
+ *DO NOT MIX 3.2 RESULTS WITH 3.3 ONES* Simix may changes simulations!
+ **************************************
+ The point is that events occuring at the exact same timestamp are
+ not scheduled in the same order with the old and new version. This
+ may be enough to completely change the execution of simulations in
+ some cases. Sorry for the inconvenience.
+
+ * Improve the testing infrastructure with tesh. Now a very large part of
+ the code is tested not only by being run but also by checking that the
+ output match an expected output [Mt].
+
+ * Move on to FleXML v1.7 for the embeeded XML parsers. This version
+ is really less memory-demanding, which should allow you to use
+ larger files in SimGrid [AL].
+
+ GRAS:
+ * Convert the PIDs from long int to int to match the MSG ones (and
+ linux ones too) [Mt]
+ * New function: gras_agent_spawn() to launch a new process on
+ current host. Only working in simulation for now. [Mt]
+ * New function: gras_os_hostport() returning a constant form (ie,
+ not needing to be freed) of "gras_os_hostname():gras_os_myport()"
+
+ XBT:
+ * Make the backtrace of exceptions more human readable [Mt]
+ * New module: xbt/str [Mt]
+ a ton of string utility functions (split, join, printf to a newly
+ allocated buffer, trim, etc)
+ * New module: xbt/synchro [Mt]
+ synchronization tools (mutex and conditions) working the same way
+ in simulation and in real life (mainly useful for GRAS, but not
+ only).
+ * New module: xbt/queue [Mt]
+ classical producer/consumer synchronization scheme
+ * xbt_dynar_new_sync() creates a synchronized dynar. All access
+ (using the classical functions will get serialized) [Mt]
+
+ SURF:
+ * Cleaned many thing in surf and fixed a few bugs [AL].
+ * Add a nice command line configuration mechanism to compose models [AL].
+ * Add a new model for parallel tasks (ptask_L07) that is less buggy than
+ the previous one (KCCFLN05). It relies on something that looks like
+ a max-min sharing mechanism but cannot be written as such. A new solver
+ was thus designed [AL].
+ * Add a new solver to lmm. Based on Lagrange optimization and
+ gradient-based descent, it enables to efficiently maximise systems s.a
+
+ sum f_i(x_i) s.t Ax<= b with A_{i,j}>=0 and f_i a concave function.
+
+ This solver enables to propose two new network models for TCP Reno and
+ TCP Vegas based on Low's work. These models still need to be fully
+ tested though [Pedro Velho].
+
+ SIMDAG [AL]:
+ * Bug fix in SD_simulate. Now the time bound given as argument is
+ used.
+ * Use the new parallel task model (ptask_L07) as default.
+ * Use the SURF command line configuration mechanism.
+ * 0-size tasks (for synchronization) should now work.
+
+ --
+
+SimGrid (3.2) unstable; urgency=low
+
+ OVERALL CHANGES:
+ * Port to windows.
+ We still experience issues on this platform, but we believe that at
+ least MSG is usable.
+
+ GRAS API BREAKAGE (for simplification purpose, sorry):
+ * the gras_msgtype_by_name is not used anymore. Instead of
+ gras_msg_send(toserver, gras_msgtype_by_name("request"), &request);
+ you can write (and must)
+ gras_msg_send(toserver, "request", &request);
+ - If you still want to pass a gras_msgtype_t to the function (to cache
+ the type and avoid the lookup time), use the gras_msg_send_() variant.
+ - Impacted functions:
+ gras_cb_register, gras_cb_unregister, gras_msg_send, gras_msg_wait,
+ gras_msg_rpccall, gras_msg_rpc_async_call, gras_msg_wait_ext
+ * The callbacks are now expected to return 0 when everything went well
+ (just like the main() function)
+
+ GRAS new features and improvements:
* New module mecanism where user code can use per process globals [Mt]
This is similar to gras_userdata_*() functions, but for libraries. It
factorize some code developped over and over in the examples and AMOK.
converted for now).
* Fix a vicious bug in the TCP buffering mecanism which leaded to message
loss when they were small enough to fit into the buffer and sent quickly
- enough so that they can all get received in one shoot.
+ enough so that they can all get received in one shoot.
+ * gras_datadesc_by_name and gras_msgtype_by_name: now raise an exception
+ if not found. Use the *_or_null() variant for the old semantic.
+ * In gras_msg_handle, do not discard messages without callback.
+ They are probably messages to be explicitly awaited later (ie, proofs of
+ mis-synchronization in userland since they are sent before being awaited)
+ No big deal usually.
+ * gras_socket_meas_send/recv: semantic changed!
+ The numerical arguments used to be (1) the total amount of data to send
+ and (2) msg_size. This was changed to (1) msg_size and (2) amount of
+ messages. This was need for the fool willing to send more than MAXINT
+ bytes on quite fat pipes.
AMOK:
* Do really rename the hostmanagement module to peermanagement. [Mt]
Ie, rename functions from amok_hm_* to amok_pm_*. This breaks the API,
but this is rather new and this was documented in the module
documentation (poor excuses, I admit)
+ * Bandwidth measurement semantic changed! This follows the changes to
+ gras_socket_meas_send/recv explained above.
SIMDAG:
* A sequential mode has been added to the workstations. When a workstation
SURF:
* The KCCFLN05 workstation model now handles parallel tasks. It is the
model for SIMDAG. [Christophe Thiery]
+ * Bug fix in the maxmin solver: Some values were close to 0 instead of
+ equal to 0, which caused some bad behaviors in
+ saturated_constraint_set_update. I now use a threshold mechanism like in
+ surf. [AL]
XBT:
* When running manually src/testall, you select specific units [Mt]
- "Valgrind spits tons of errors!" [Mt]
- "How to repport bugs" [Mt]
- "Cross-compiling a Windows DLL of SimGrid from Linux" [Mt]
+ - "What is the difference between MSG, SimDag, and GRAS?" [Mt]
+ - Communication time measurement within MSG [AL]
+ - I experience weird communication times when I change the latency [AL]
* GRAS tutorial [Mt]
It contains:
- an introduction to the framework and to the used communication model
- an initiatic tour introducing the most proheminent features:
- # Part 1: Bases
+ o Part 1: Bases
. Lesson 0: Installing GRAS
. Lesson 1: Setting up your own project
- # Part 2: Message passing
+ o Part 2: Message passing
. Lesson 2: Exchanging simple messages
. Lesson 3: Passing arguments to the processes (in SG)
. Lesson 4: Attaching callbacks to messages
. Lesson 7: Using internal timers
. Lesson 8: Handling errors through exceptions
. Lesson 9: Exchanging simple data
+ . Lesson 10: Remote Procedure Calling (RPC)
+ . Lesson 11: Explicitely waiting for messages
+ . Recapping of message passing features in GRAS
+ - A HOWTO section containing:
+ o HOWTO design a GRAS application
More are due, of course. They will come latter. In the meanwhile, you can
check the examples which are still here.
- --
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri Mar 16 21:11:46 CET 2007
SimGrid (3.1) unstable; urgency=low
