+SimGrid (3.1.1) unstable; urgency=low
+
+ GRAS:
+ * 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.
+ It has still to be documented and used (only amok/peermanagement is
+ 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.
+ * 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
+ is in sequential mode, it can execute only one task, and the other tasks
+ are waiting in a FIFO. [Christophe Thiery]
+
+ 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]
+ testall is the result of our cunit mecanism, and should replace all
+ the scripty thingy around since bash don't run easily on billware.
+
+ * A mallocator system has been added. [Christophe Thiery]
+ Mallocators allow you to recycle your unused objects instead of freeing them
+ and allocating new ones.
+
+ Documentation update:
+ * FAQ reworking + New FAQs:
+ - "Valgrind spits tons of errors!" [Mt]
+ - "How to repport bugs" [Mt]
+ - "Cross-compiling a Windows DLL of SimGrid from Linux" [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
+ . Lesson 0: Installing GRAS
+ . Lesson 1: Setting up your own project
+ # 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 5: Using globals in processes
+ . Lesson 6: Logging informations properly
+ . Lesson 7: Using internal timers
+ . Lesson 8: Handling errors through exceptions
+ . Lesson 9: Exchanging simple data
+ More are due, of course. They will come latter. In the meanwhile, you can
+ check the examples which are still here.
+
+ --
+
+SimGrid (3.1) unstable; urgency=low
+
+ General:
+ * Port to gcc 4.x
+ There was a stack corruption somewhere, visible only when optimizing
+ with these versions. [Vince]
+
+ SIMDAG:
+ * This is a NEW module! SimDAG (SD for short) is a revival of the old SG
+ module that enabled to play with Directed Acyclic Graphs. It is built
+ directly on top of SURF and provides an API rather close to the old
+ SG. Some old codes using SG are currently under rewrite to check that
+ all needful functions are provided. [Christophe Thiery]
+
+ SURF:
+ * Complete rewrite of the KCCFLN05 workstation model. It is now an
+ extension of the classical CLM03 model that gracefully handles
+ failures. This is now the default model for MSG and GRAS. It doesn't
+ handle parallel tasks yet though. [AL]
+ * Bug fix: Weights were not correctly set in the network part.
+ WARNING: This may have resulted in incorrect results with simulations
+ where there are more than one flow on a given link. [AL]
+
+ SURF, MSG, GRAS:
+ * After a (long ?) discussion on simgrid-devel, we have decided that the
+ convention we had on units was stupid. That is why it has been decided
+ to move from (MBits, MFlops, seconds) to (Bits, Flops, seconds).
+ WARNING : This means that all previous platform files will not work as
+ such with this version! A warning is issued to ask users to update
+ their files. [AL]
+ A conversion script can be found in the contrib module of the CVS, under
+ the name contrib/platform_generation/surfxml_update.pl [MQ]
+
+ MSG,GRAS:
+ * Bug fix: Processes were started in reverse order, wrt deployment file.
+ WARNING: if your code relies on this bug, please fix it. [AL]
+ * Bug fix: Add a test in MSG_task_execute to stop whenever a task is
+ being executed on two different locations. [AL]
+ * Bug fix: Failures are now better supported thanks to Derrick's tests
+ (there was many failure situations I hadn't thought of and that weren't
+ correctly handled). [AL]
+ * New function: MSG_host_is_avail indicates you whether a given m_host_t
+ is up or down. [AL]
+
+ GRAS:
+ * New! a real RPC mecanism, as it ought to be since too long. [MQ]
+ Exception occurring on server-side are propagated back to client (!).
+
+ API CHANGE: the callback changed their prototype. Change:
+ int my_handler(gras_socket_t expeditor, void *payload_data) {
+ to:
+ int my_handler(gras_msg_cb_ctx_t ctx , void *payload_data) {
+ gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
+ and you're set.
+ * New! function: gras_msg_handleall to deal with all messages arriving
+ within a given period.
+ * New! function: gras_socket_server_range to get a server socket in a
+ range of port numbers (ease to avoid port number conflicts) [MQ]
+ * New! gras processes display their backtrace when they get a SIGUSR1
+ or when Ctrl-C is pressed. Use Ctrl-C Ctrl-C to exit.
+ Sweet to debug RL processes [MQ]
+
+ AMOK:
+ * Bandwidth module:
+ - Do not force experiment sizes to be expressed in kb, or it becomes
+ impossible to measure the latency this way (needs one byte-long tests)
+ WARNING: this changes the amok_bw_* function semantic. [MQ]
+ - Implements the link saturation stuff. [MQ]
+ * Peer management module:
+ New! module factorizing code that we wrote over and over [MQ].
+
+ XBT:
+ * New module: cunit (my jUnit implementation in ansi C) [MQ]
+ - Test units are placed directly into the library code, they get extracted
+ automatically and placed into the src/testall binary.
+ - Convert most of the XBT tests to this system.
+ * New functions: xbt_dynar_getfirst_as() and xbt_dynar_getlast_as() [MQ]
+ * XML parsing: rewrote parts of flexml to enable multiple xml parsers to
+ live in the same C code. This required to change a little bit the API
+ of surfxml parsing but shouldn't be an issue for end-users. [AL]
+ * New module: sparse graph structure with basic algorithms (this is work
+ in progress and the API is not considered to be frozen yet). [AL]
+ * Display more information on backtraces: source line & function names are
+ now displayed just like valgrind does (rely on addr2line tool) [MQ]
+ * New function: xbt_backtrace_display(). Sweet while debuging [MQ]
+ * Reworked a little bit some #include statements to load only required
+ headers. Some user code that relied on SimGrid to include stdlib or
+ stdio may need to include it by themselves. [AL]
+ * Fixed xbt/log.h. A missing SG_BEGIN_DECL prevented compilation with
+ g++. [AL]
+ * Renamed xbt_host_t into xbt_peer_t since it betterly describes what I
+ meant. This breaks the API of AMOK and of xbt/config. Sorry about this,
+ but I guess that almost nobody used those parts. [MQ]
+
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 14 Jul 2006 01:32:27 +0200
+
+SimGrid (3.0.1) unstable; urgency=low
+
+ XBT:
+ * Unfortunately, I had missed 5 misnamed functions:
+ xbt_fifo_item_t xbt_fifo_newitem(void);
+ void xbt_fifo_freeitem(xbt_fifo_item_t);
+ xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l);
+ xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i);
+ xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i);
+ They're now deprecated. Please use their new versions:
+ xbt_fifo_item_t xbt_fifo_new_item(void);
+ void xbt_fifo_free_item(xbt_fifo_item_t);
+ xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l);
+ xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i);
+ xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i);
+ [AL]
+ * Bugfix: really disconnect fifo items which are remove_item()ed [AL]
+ * Documentation: xbt_log module unmercifully reworked [MQ]
+ * Bugfix: there was a problem with the ending of contexts with
+ the pthread backend. It caused some weird deadlock or behavior
+ depending on the pthread implementation. [AL]
+ * Bugfix: get the exceptions raised in the simulator repport where
+ and why they come from when they are not catched in time [AL, MQ]
+
+ SURF:
+ * Bugfix: Do repport the error when two non-connected hosts try to
+ exchange data (Thanks to Flavien for stumbling into this one) [AL]
+
+ SURF:
+ * Add additionnal checkings on communications. Assert that two
+ communicating hosts are connected by a set of links... [AL]
+
+ MSG:
+ * Add additionnal checkings on channel values in communication [AL]
+ * New: MSG_task_get_source to see on which host a task was generated [HC]
+ * New: int MSG_task_probe_from_host(int channel, m_host_t host): returns
+ the number of tasks waiting to be received on channel and sent
+ by host. [AL]
+ * New: MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, m_host_t host);
+ waits for the first task coming from a given host.. [AL]
+
+ GRAS new functionnalities: [MQ]
+ * Enhance the parsing macro to allow the size of multidimentional objects
+ to be given thru annotations.
+ * New example (and documentation): Matrix Multiplication a la RPC
+ (as when I was young!) and fix a bunch of bugs found on the way.
+
+ GRAS performance improvements: [MQ]
+ [DataDesc]
+ * Reduce the amount of cbps creation/destruction by making it static to
+ datadesc_send/recv() and using a (newly created) cbps_reset (based on
+ dynar_reset ())
+ [Virtu]
+ * Change libdata to a set so that we can search for stuff by ID (and thus
+ reduce the insane amount of dict lookups)
+
+ [Transport]
+ * Actually implement gras_datadesc_copy() so that we don't have to mimick
+ RL communication on top of SG since it's so uneffective.
+ It may also be used for inter-thread communication in RL, one day.
+ * Use gras_datadesc_copy() to exchange messages on top of SG
+ Allows to:
+ - improve message exchange performance on top of SG
+ - deprecate transport_plugin_sg.c:gras_trp_sg_chunk_send() & recv()
+ * Don't exchange on the network the size of the used part of buffer,
+ instead, specify the possible buffer size to read().
+ Advantages:
+ - reduces the amount of read/write calls (one pair per exchange)
+ - reduces the amount of exchanged data (the size)
+ - allows to retrieve all arrived data on receiver side, if we don't need
+ it right now (subsequent read will peek the buffer)
+ - allows the receiver to proceed with the begining of the stream before
+ everything is arrived
+ - make it possible to build an iov transport (using readv/writev)
+ Extra difficulty:
+ - take care of the data with non-stable storage (like stacked data),
+ and bufferize them.
+ * If possible, TCP send uses vector I/O (when writev() is here)
+ - Don't use it for receive since we send data sizes and data on the
+ same stream, so we wouldn't be able to chain large amount of chunks
+ before having to flush the stuff to read the size.
+ * Rework the transport plugin mecanism to simplify it and reduce the
+ amount of pointer dereferencement when searching for the right function
+ to use.
+
+ * I guess that now, we do almost as few system calls as possible while
+ doing as few data copy as possible.
+
+ To improve it further, we could try to send all the sizes first and then
+ all the data (to use iov on receiving size), but it's only a partial
+ solution: when you have 2 dimensional data, the sizes of the second
+ dimension is data of the first dimension, so you need 3 streams.
+
+ I'm not sure the potential performance gains justify the coding burden.
+
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 21 Oct 2005 14:42:20 +0200
+
+SimGrid (3.00) stable; urgency=low
+
+ SURF:
+ * New! Give the possibility to hijack the surf parser and thus bypass
+ MSG_create_environment and MSG_launch_application. Have a look at
+ examples/msg/msg_test_surfxml_bypassed.c to see how it can be done.
+
+ -- Arnaud Legrand <simgrid-devel@lists.gforge.inria.fr> Sat, 20 Aug 2005 23:25:25 -0700
+
SimGrid (2.96) unstable; urgency=low
- *
+ AKA SimGrid 3 rc 2.
+
+ XBT:
+ * New! Exception handling with setjmp or such (code from OSSP ex) [MQ]
+ This deprecates the xbt_error_t mecanisms.
+ It modifies (simplifies) all XBT and GRAS API.
+ MSG API keeps unchanged (exceptions raised by XBT are catched from
+ within MSG and masked with existing error handling facilities)
+
+ SURF:
+ * New! Add a FATPIPE model. [AL]
+ * New! Add a parallel task model. [AL]
+ * New! Add automatically a loopback interface (in the default
+ network model) if none was precised.
- --
+ MSG
+ * Bugfix: MSG_process_resume now works with the current running process.
+ [AL]
+ * New! Add MSG_parallel_task_create and MSG_parallel_task_execute. [AL]
+ * Modification of MSG_task_get_compute_duration. Once a task has been
+ processed, the value returned by this function is now equal to 0. [AL]
+ * New! Add double MSG_task_get_remaining_computation(m_task_t task) and
+ MSG_error_t MSG_task_cancel(m_task_t task). Add a state
+ (MSG_TASK_CANCELLED) to MSG_error_t corresponding to the cancelation
+ of a m_task. For now, MSG_task_cancel only works with computation
+ tasks. [AL]
+ * New! Add double MSG_get_host_speed(m_host_t h) that returns the speed
+ of the processor (in Mflop/s) regardless of the current load on the
+ machine. [AL]
+ * API Change: use proper naming convention for MSG_getClock and
+ MSG_process_isSuspended: MSG_get_clock and MSG_process_is_suspended.
+ [AL]
+ * New! Add void MSG_task_set_priority(m_task_t task, double priority).
+ This function changes the priority of a computation task. This priority
+ doesn't affect the transfer rate. A priority of 2 will make a task
+ receive two times more cpu power than the other ones. This function
+ has been added to suit the needs of Nguyen The Loc and hasn't been that
+ much tested yet. So if it fails, please report it and send me your code.
+ [AL]
+ * API Change: removed all functions and types that were marked "deprecated"
+ since many months. Renamed MSG_global_init_args to MSG_global_init.
+
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Mon, 8 Aug 2005 17:58:47 -0700
SimGrid (2.95) unstable; urgency=low
