add WifiZone support for ns3 wifi

[simgrid.git] / ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 4823482..f189cb2 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,8 @@
 SimGrid (3.25.1) UNRELEASED (target: March 20 2020 or v3.26 on 3/26/20)
 
 Important user-visible changes:
 SimGrid (3.25.1) UNRELEASED (target: March 20 2020 or v3.26 on 3/26/20)
 
 Important user-visible changes:

+ - SimGrid now requires a compiler with C++14 support.
+   Sibling projects should upgrade their FindSimgrid.cmake

  - Surf precision default value is now 1e-9, instead of 1e-5. This was changed as
    several users had difficult to understand issues when using high bandwidth or
    small latency events. The new value was already the default for SMPI and
  - Surf precision default value is now 1e-9, instead of 1e-5. This was changed as
    several users had difficult to understand issues when using high bandwidth or
    small latency events. The new value was already the default for SMPI and


@@ -11,19 +13,47 @@ Important user-visible changes:
    an issue of said simulation). The value can still be changed back using
    --cfg=surf/precision:1e-5.
  - On some network models (L07, CM02, LV08), an implicit loopback link is created
    an issue of said simulation). The value can still be changed back using
    --cfg=surf/precision:1e-5.
  - On some network models (L07, CM02, LV08), an implicit loopback link is created

-   for local communication. Default bandwidth was 500MMps and latency was 15µs,
+   for local communication. Default bandwidth was 500MBps and latency was 15µs,

    which was rather bad. Default values have been changed to 10GBps and 0 latency.
    Options network/loopback-lat and network/loopback-bw have been added to adapt
    these values if needed. Network and routing models already providing separate
    loopbacks (clusters and such) are not impacted by this change.
    which was rather bad. Default values have been changed to 10GBps and 0 latency.
    Options network/loopback-lat and network/loopback-bw have been added to adapt
    these values if needed. Network and routing models already providing separate
    loopbacks (clusters and such) are not impacted by this change.

+ - SMPI now adds 16 bytes of header to each message sent, in order to simulate
+   metadata that are added to each MPI message by MPI libraries (tag,
+   src/dest, and communicator information). This may change simulation times
+   for very small message sizes, but should be more realistic.
+
+New features:
+ - New routing 'WiFi' that makes it easier to specify a wifi network zone.
+ - New plugins: wifi_energy and link_load. See the associated examples.
+ - New examples: wifi networks, and communication suspend.

 
 General:
  - LTO is now enabled for Intel/clang compilers.
  - LTO behavior on GCC can be parameterized using LTO_EXTRA_FLAG in cmake.
    Setting it to "auto" will use all available cores, while setting it to n will
    use n cores to speedup link step (usage: cmake -DLTO_EXTRA_FLAG=4).
 
 General:
  - LTO is now enabled for Intel/clang compilers.
  - LTO behavior on GCC can be parameterized using LTO_EXTRA_FLAG in cmake.
    Setting it to "auto" will use all available cores, while setting it to n will
    use n cores to speedup link step (usage: cmake -DLTO_EXTRA_FLAG=4).

+ - Remove obsolete option --cfg=contexts/parallel-threshold.
+ - Further improve the documentation.
+
+S4U:
+ - the on_exit() of each actor is also executed when the simulation deadlocks.
+ - New functions: s4u::Activity:: suspend(), resume() and is_suspended()
+   An example is provided for s4u::Comm but it should work with Exec and Io.

 
 

-C interface:
+SMPI:
+ - Update proxy apps coverage of new ECP apps: 60+ apps now tested nightly on
+   https://framagit.org/simgrid/SMPI-proxy-apps
+ - MPI/IO: supports names starting with "./"
+ - Fortran: many MPI/IO bindings, support for MPI_UB/LB, C MPI_INT/FLOAT/DOUBLE
+   datatypes.
+ - smpicc/cxx/ff/f90 now will actually perform definition checks at link time. When
+   building shared libraries, this may cause issues, so environment variable
+   SMPI_NO_UNDEFINED_CHECK can be added to disable this.
+
+C binding and interface:
+ - The return type of the sg_actor_on_exit() callbacks is now 'void'
+   (int value was previously ignored)

  - Many MSG tests were converted to the new S4U's interface in C, that
    was extended for that.
 
  - Many MSG tests were converted to the new S4U's interface in C, that
    was extended for that.
 


@@ -32,11 +62,21 @@ Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
  - FG#41: Add sg_actor_create C interface
  - FG#43: xbt::random needs some care
  - FG#48: The Impossible Did Happen (yet again)
  - FG#41: Add sg_actor_create C interface
  - FG#43: xbt::random needs some care
  - FG#48: The Impossible Did Happen (yet again)

+ - FG#50: Suspending an actor executed at the current timestamp fails
+ - FG#54: How to suspend a comm?

  - FG!24: Documentation and fix for xbt/random
  - FG!24: Documentation and fix for xbt/random

+ - FG!35: Add a modeling hint for parallel links in doc
+ - FG!36: [xbt/random] Read/Write the state of the RNG
+ - FG!42: Link cumulated load plugin
+ - FG!44: Test condition variable wait_until+notify_all

  - GF#18137: Allow different stack sizes?
  - GH#128: Parallelization of simulation with --cfg=contexts/nthreads
  - GH#139: Allow pthread creation in SMPI
  - GH#336: Packet-level simulation using SMPI?
  - GF#18137: Allow different stack sizes?
  - GH#128: Parallelization of simulation with --cfg=contexts/nthreads
  - GH#139: Allow pthread creation in SMPI
  - GH#336: Packet-level simulation using SMPI?

+ - GH#346: [SMPI] error while loading shared libraries: libsimgrid.so
+ - GH!337: Fix link_energy plugin for wifi platforms
+ - GH!339: Add Mailbox set_receiver method to python binding
+ - GH!344: Cast hugepages macros parameters to int64

 
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@@ -559,7 +599,7 @@ Plugins:
  - Rename Energy plugin into host_energy
  - Rename Load plugin into host_load
 
  - Rename Energy plugin into host_energy
  - Rename Load plugin into host_load
 

-simix:
+Simix:

  - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
  - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
  - Improve performance when handling timeouts of simix synchros.
  - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
  - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
  - Improve performance when handling timeouts of simix synchros.