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2 years agocosmetics (before move to src/kernel/resource ??)
SUTER Frederic [Mon, 3 May 2021 13:28:51 +0000 (15:28 +0200)]
cosmetics (before move to src/kernel/resource ??)

2 years agonot needed anymore
SUTER Frederic [Mon, 3 May 2021 12:11:31 +0000 (14:11 +0200)]
not needed anymore

2 years agodo not use RouteCreationArgs outside of XML parsing
SUTER Frederic [Mon, 3 May 2021 10:49:56 +0000 (12:49 +0200)]
do not use RouteCreationArgs outside of XML parsing

3 years agoResize(0) is redundant.
Arnaud Giersch [Fri, 30 Apr 2021 13:30:28 +0000 (15:30 +0200)]
Resize(0) is redundant.

3 years agoMissing includes.
Arnaud Giersch [Fri, 30 Apr 2021 13:27:28 +0000 (15:27 +0200)]
Missing includes.

3 years agoCleanup some unused and/or useless build config variables.
Arnaud Giersch [Fri, 30 Apr 2021 09:56:10 +0000 (11:56 +0200)]
Cleanup some unused and/or useless build config variables.

3 years agodo not need ClusterCreationArgs anymore
SUTER Frederic [Fri, 30 Apr 2021 10:59:22 +0000 (12:59 +0200)]
do not need ClusterCreationArgs anymore

3 years agorefactor link characteristics management across Clustered Zones
SUTER Frederic [Fri, 30 Apr 2021 09:51:45 +0000 (11:51 +0200)]
refactor link characteristics management across Clustered Zones

3 years agoTorus/Fat-Tree/Dragonfly: Aggregate callbacks
Bruno Donassolo [Fri, 30 Apr 2021 09:50:29 +0000 (11:50 +0200)]
Torus/Fat-Tree/Dragonfly: Aggregate callbacks

Put set callbacks in an object.
Less (or encapsulated) arguments for create_zones.
Remove create_cluster_zone (create_star_zone does its job for C++
interfaces).

3 years agoAsan sometimes chokes on RUNNING_ON_VALGRIND. Workaround by changing the test.
Arnaud Giersch [Fri, 30 Apr 2021 09:03:12 +0000 (11:03 +0200)]
Asan sometimes chokes on RUNNING_ON_VALGRIND. Workaround by changing the test.

3 years agoLibunwind is useless for non-MC builds.
Arnaud Giersch [Fri, 30 Apr 2021 08:08:28 +0000 (10:08 +0200)]
Libunwind is useless for non-MC builds.

Moreover its presence causes unwanted false-positives with Asan.

3 years agoFix 32 bits now...
Bruno Donassolo [Thu, 29 Apr 2021 17:23:32 +0000 (19:23 +0200)]
Fix 32 bits now...

3 years agoOoops.. Fix CmakeFiles and MANIFEST
Bruno Donassolo [Thu, 29 Apr 2021 16:49:58 +0000 (18:49 +0200)]
Ooops.. Fix CmakeFiles and MANIFEST

3 years agoCluster: use radicals from XML when creating resources
Bruno Donassolo [Thu, 29 Apr 2021 14:41:14 +0000 (16:41 +0200)]
Cluster: use radicals from XML when creating resources

Use radicals from XML when creating hosts in sg_platf.xml.
Fix bug with limiter.
Add test.

3 years agodo not throw signal from sg_platf
SUTER Frederic [Thu, 29 Apr 2021 14:01:36 +0000 (16:01 +0200)]
do not throw signal from sg_platf

3 years agoUse new API to create Torus/Dragonfly/Fat-Tree clusters from XML.
Bruno Donassolo [Thu, 29 Apr 2021 10:49:12 +0000 (12:49 +0200)]
Use new API to create Torus/Dragonfly/Fat-Tree clusters from XML.

Get rid of ClusterCreationArgs in Torus/Dragonfly/Fat-tree.

NOTE: Routers aren't created anymore for Torus/Dragonfly/Fat-tree zones.
- This router was lost in the middle of topology connected through empty
routes (no links)
- In the past, the sg_platf created a router automatically for these
netzones since they shared the same sg_platf_new_cluster function.
- Impact on flatfier test: cluster_torus.xml.

3 years agoFatTreeZone: Do the checks earlier
Bruno Donassolo [Wed, 28 Apr 2021 16:39:11 +0000 (18:39 +0200)]
FatTreeZone: Do the checks earlier

3 years agoNew: s4u::create_dragonfly_zone
Bruno Donassolo [Wed, 28 Apr 2021 13:38:28 +0000 (15:38 +0200)]
New: s4u::create_dragonfly_zone

Implements the builder method for Dragonfly zones.

New example: Dragonfly cluster of multi-cpu hosts(Star Zones)

3 years agoCosmetics
Bruno Donassolo [Wed, 28 Apr 2021 09:24:54 +0000 (11:24 +0200)]
Cosmetics

3 years agoMC tuto: Review by Emma
Martin Quinson [Wed, 28 Apr 2021 08:24:37 +0000 (10:24 +0200)]
MC tuto: Review by Emma

3 years agoAttribute noreturn for terminate handler.
Arnaud Giersch [Wed, 28 Apr 2021 06:28:53 +0000 (08:28 +0200)]
Attribute noreturn for terminate handler.

3 years agoWe don't want to survive a ForcefulKillException!
Arnaud Giersch [Tue, 27 Apr 2021 17:00:25 +0000 (19:00 +0200)]
We don't want to survive a ForcefulKillException!

3 years agoThe header <typeinfo> must be included before using typeid.
Arnaud Giersch [Sun, 25 Apr 2021 12:14:54 +0000 (14:14 +0200)]
The header <typeinfo> must be included before using typeid.

3 years agoNew example: Fat Tree cluster of multi-cpu hosts(Star Zones)
Bruno Donassolo [Tue, 27 Apr 2021 17:10:27 +0000 (19:10 +0200)]
New example: Fat Tree cluster of multi-cpu hosts(Star Zones)

Adapt existing Torus example for different platforms.
Same idea: each leaf is a new StarZone netzone, emulating a multi-cpu
node.

3 years agoNew: s4u::create_fatTree_zone
Bruno Donassolo [Mon, 26 Apr 2021 15:12:13 +0000 (17:12 +0200)]
New: s4u::create_fatTree_zone

Implements the builder method for Fat Tree zones.

Similar signature and behavior of create_torus_zone.

3 years agoFix FatTreeZone with limiter links
Bruno Donassolo [Tue, 27 Apr 2021 15:27:03 +0000 (17:27 +0200)]
Fix FatTreeZone with limiter links

Are we sure we want this "feature" in complex clusters?
As for Torus, no test using it.

Segfault when communicating with limiter links.
Routers inside the FatTreeZone don't have limiters, even when user sets
the limiter on the XML.

Code was adding nullptr to the list of links in this case, generating a
segfault in communicate function.

Example:
  <zone id="world" routing="Full">
    <cluster id="bob_cluster"
     prefix="node-" radical="0-15" suffix=".simgrid.org"
     speed="1Gf" bw="125MBps" lat="50us"
             topology="FAT_TREE" topo_parameters="2;4,4;1,2;1,2"
     loopback_bw="100MBps" loopback_lat="0" limiter_link="100MBps" />

3 years agoFirst version of a tutorial on Mc SimGrid
Martin Quinson [Tue, 27 Apr 2021 15:37:18 +0000 (17:37 +0200)]
First version of a tutorial on Mc SimGrid

3 years agocosmetics
Martin Quinson [Tue, 27 Apr 2021 15:36:00 +0000 (17:36 +0200)]
cosmetics

3 years agoAdd a pointer from the doc sources to the online one
Martin Quinson [Sun, 25 Apr 2021 22:19:56 +0000 (00:19 +0200)]
Add a pointer from the doc sources to the online one

3 years agoadd a (modern) wait_any for Io activities. Thx agier!
SUTER Frederic [Tue, 27 Apr 2021 13:39:39 +0000 (15:39 +0200)]
add a (modern) wait_any for Io activities. Thx agier!

3 years agothrow signal from seal() directly
SUTER Frederic [Tue, 27 Apr 2021 08:22:30 +0000 (10:22 +0200)]
throw signal from seal() directly

3 years agoTry to please sonar
Bruno Donassolo [Mon, 26 Apr 2021 16:51:22 +0000 (18:51 +0200)]
Try to please sonar

3 years agoImprovements in torus test
Bruno Donassolo [Fri, 23 Apr 2021 08:20:11 +0000 (10:20 +0200)]
Improvements in torus test

Use 2 links in Star Zone to simulate full-duplex communications.
Improv doc.

3 years agoInitialize models together with netzone root
Bruno Donassolo [Wed, 21 Apr 2021 20:12:39 +0000 (22:12 +0200)]
Initialize models together with netzone root

Remove static to initialize models once, anyway we have only one engine
in a simulation by now. Hope someday we'll be able to initialize the
models properly.

Remove workaround in UTs

3 years agoNew example: Torus cluster of multi-cpu hosts(Star Zones)
Bruno Donassolo [Wed, 21 Apr 2021 15:05:37 +0000 (17:05 +0200)]
New example: Torus cluster of multi-cpu hosts(Star Zones)

Add a new example showing how to build a torus cluster composed of
netzones instead of single hosts.

Each leaf is a StarZone, representing a host with 8 CPUs connected in a
star. CPU-0 is the gateway for each StarZone.

Runs a simple broadcast application where each CPU runs a specific
actor.

3 years agoNetZone::get_netpoint: gets the netzone's netpoint
Bruno Donassolo [Wed, 21 Apr 2021 18:35:03 +0000 (20:35 +0200)]
NetZone::get_netpoint: gets the netzone's netpoint

New method to get the netpoint used by netzones.
Usefull when describing routes using the netzones (add_route method)

3 years agoAdd some UT for TorusZone
Bruno Donassolo [Wed, 21 Apr 2021 10:02:25 +0000 (12:02 +0200)]
Add some UT for TorusZone

Improve some checks.

3 years agoNew: s4u::create_torus_zone
Bruno Donassolo [Mon, 19 Apr 2021 17:30:26 +0000 (19:30 +0200)]
New: s4u::create_torus_zone

Implements the builder method for Torus zones

NetZone* create_torus_zone(const std::string& name, const NetZone* parent, const std::vector<unsigned int>& dimensions,
                           double bandwidth, double latency, Link::SharingPolicy sharing_policy,
                           const std::function<TorusNetPointCb>& set_netpoint,
                           const std::function<TorusLinkCb>& set_loopback = {},
                           const std::function<TorusLinkCb>& set_limiter  = {});

This builder method allow us to keep hiding the internals of our
NetZones, exporting only a NetZone* to the end-user.

It uses callbacks functions to populate the leaves in the Torus, 3
callbacks can be used:
- set_netpoint: must return a pair NetPoint,Gateway. This allows us to
have complex netzones under each leaf
- set_loopback: The link used to loopback communications
- set_limiter: A limiter link for each leaf

The links inside the Torus are homogeneous and described by the
bandwidth, latency and sharing policy parameters.

As the creation of resources are linked to the netzones (create_host,
create_link functions), we have to add the parent parameter to the
builder function. Otherwise, the user cannot create the resources
associated with the leaves in the callbacks.

Obs.: By now, the sg_platf.cpp isn't using this new builder method.
It will be changed once we have implemented the builder for every
cluster type (fatree, dragonfly).

3 years agoRename VirtualMachine::get_impl() to not hide Host::get_impl().
Arnaud Giersch [Fri, 23 Apr 2021 07:47:07 +0000 (09:47 +0200)]
Rename VirtualMachine::get_impl() to not hide Host::get_impl().

3 years agoMake SIMIX_simcall_name() use the type of observer_ if it exists.
Arnaud Giersch [Thu, 22 Apr 2021 20:45:52 +0000 (22:45 +0200)]
Make SIMIX_simcall_name() use the type of observer_ if it exists.

It gives more information about the kind of simcall being involved,
since most simcalls are nowadays of type RUN_KERNEL or RUN_BLOCKING.

3 years agoUse std::string::rfind to match string prefix.
Arnaud Giersch [Thu, 22 Apr 2021 20:27:08 +0000 (22:27 +0200)]
Use std::string::rfind to match string prefix.

3 years agoUnused #include.
Arnaud Giersch [Thu, 22 Apr 2021 20:17:25 +0000 (22:17 +0200)]
Unused #include.

3 years agoRaise exception for invalid parameters in StarZone
Bruno Donassolo [Thu, 22 Apr 2021 16:47:15 +0000 (18:47 +0200)]
Raise exception for invalid parameters in StarZone

We've talked about using exceptions for invalid parameters in user'
calls.
Adjust for StarZone.
Bonus: We can test it in UT with catch

3 years ago[sonar] Implicit casts should not lower precision.
Arnaud Giersch [Thu, 22 Apr 2021 13:37:36 +0000 (15:37 +0200)]
[sonar] Implicit casts should not lower precision.

3 years agoUse type aid_t for actor ids.
Arnaud Giersch [Thu, 22 Apr 2021 10:55:32 +0000 (12:55 +0200)]
Use type aid_t for actor ids.

3 years agoFactor code for simcall observers with a result.
Arnaud Giersch [Wed, 21 Apr 2021 10:39:19 +0000 (12:39 +0200)]
Factor code for simcall observers with a result.

3 years agoCosmetics: make parameter name match with .hpp.
Arnaud Giersch [Wed, 21 Apr 2021 08:57:07 +0000 (10:57 +0200)]
Cosmetics: make parameter name match with .hpp.

3 years agoFactor Activity::wait() and wait_for() through CRTP.
Arnaud Giersch [Wed, 21 Apr 2021 22:02:17 +0000 (00:02 +0200)]
Factor Activity::wait() and wait_for() through CRTP.

3 years agoFactor Activity::cancel() through CRTP.
Arnaud Giersch [Wed, 21 Apr 2021 21:38:18 +0000 (23:38 +0200)]
Factor Activity::cancel() through CRTP.

3 years agoComm::test() is ready to be merged with Activity::test().
Arnaud Giersch [Wed, 21 Apr 2021 21:22:58 +0000 (23:22 +0200)]
Comm::test() is ready to be merged with Activity::test().

3 years agoDefine overridable Activity::complete() to be called on activity completion.
Arnaud Giersch [Wed, 21 Apr 2021 07:57:56 +0000 (09:57 +0200)]
Define overridable Activity::complete() to be called on activity completion.

This adds some assignments of State::FINISHED, but it looks like they were
previously forgotten.  No test is broken.

3 years agoFix TorusZone with limiter links
Bruno Donassolo [Wed, 21 Apr 2021 15:57:05 +0000 (17:57 +0200)]
Fix TorusZone with limiter links

Raises an std::out_of_range exception when it tries to add the limiter
link to routes.

Example:
    <cluster id="bob_cluster" topology="TORUS" topo_parameters="3,2,2"
     prefix="node-" radical="0-11" suffix=".simgrid.org"
     speed="1Gf" bw="125MBps" lat="50us"
     loopback_bw="100MBps" loopback_lat="0" limiter_link="100MBps"/>

Not sure if someone uses this limiter. We don't have any test that uses limiter_link tag inside a
TORUS cluster. It'll be added in with the new C++ interface.

3 years agoReduce scope for variable.
Arnaud Giersch [Tue, 20 Apr 2021 19:35:42 +0000 (21:35 +0200)]
Reduce scope for variable.

3 years agoGlobal--.
Arnaud Giersch [Tue, 20 Apr 2021 13:20:36 +0000 (15:20 +0200)]
Global--.

3 years agoAnother bunch of int -> size_t conversion.
Arnaud Giersch [Tue, 20 Apr 2021 12:58:05 +0000 (14:58 +0200)]
Another bunch of int -> size_t conversion.

3 years agoaid_t for src and dst in smpi::Request.
Arnaud Giersch [Tue, 20 Apr 2021 09:29:38 +0000 (11:29 +0200)]
aid_t for src and dst in smpi::Request.

3 years agoConvert some int -> size_t.
Arnaud Giersch [Tue, 20 Apr 2021 08:03:15 +0000 (10:03 +0200)]
Convert some int -> size_t.

3 years agoPrefer emplace to insert.
Arnaud Giersch [Tue, 20 Apr 2021 07:39:45 +0000 (09:39 +0200)]
Prefer emplace to insert.

3 years agoFor Sonar.
Arnaud Giersch [Tue, 20 Apr 2021 07:22:31 +0000 (09:22 +0200)]
For Sonar.

3 years agoMore aid_t.
Arnaud Giersch [Tue, 20 Apr 2021 07:19:32 +0000 (09:19 +0200)]
More aid_t.

3 years agoAvoid alternative keywords for boolean expressions.
Arnaud Giersch [Tue, 20 Apr 2021 07:09:51 +0000 (09:09 +0200)]
Avoid alternative keywords for boolean expressions.

Plus slight simplifications.

3 years agoReference for std::vector parameters.
Arnaud Giersch [Mon, 19 Apr 2021 20:47:58 +0000 (22:47 +0200)]
Reference for std::vector parameters.

3 years agoFix bound checking.
Arnaud Giersch [Mon, 19 Apr 2021 20:28:41 +0000 (22:28 +0200)]
Fix bound checking.

3 years agoCombine identical conditions.
Arnaud Giersch [Mon, 19 Apr 2021 20:19:41 +0000 (22:19 +0200)]
Combine identical conditions.

3 years agoUse std algorithm.
Arnaud Giersch [Mon, 19 Apr 2021 20:16:07 +0000 (22:16 +0200)]
Use std algorithm.

3 years agoUseless indirection.
Arnaud Giersch [Mon, 19 Apr 2021 20:09:58 +0000 (22:09 +0200)]
Useless indirection.

3 years agoSonar const's...
Arnaud Giersch [Mon, 19 Apr 2021 20:02:38 +0000 (22:02 +0200)]
Sonar const's...

3 years agoConvert int -> size_t for TRACE_smpi_send (and below).
Arnaud Giersch [Mon, 19 Apr 2021 19:52:14 +0000 (21:52 +0200)]
Convert int -> size_t for TRACE_smpi_send (and below).

3 years agoMore int -> aid_t.
Arnaud Giersch [Mon, 19 Apr 2021 19:08:54 +0000 (21:08 +0200)]
More int -> aid_t.

3 years agoUse type aid_t for process id. in instr_smpi.
Arnaud Giersch [Mon, 19 Apr 2021 16:32:58 +0000 (18:32 +0200)]
Use type aid_t for process id. in instr_smpi.

3 years agoAdapt leak example to new display.
Augustin Degomme [Mon, 19 Apr 2021 14:07:52 +0000 (16:07 +0200)]
Adapt leak example to new display.
Add another leak and a size change between processes to see what it shows.

3 years agoGroup buffer leaks by origin as well.
Augustin Degomme [Mon, 19 Apr 2021 14:06:55 +0000 (16:06 +0200)]
Group buffer leaks by origin as well.
Keep total size and min/max for each if possible, then display by largest total size.

3 years agoPlug memory leak.
Arnaud Giersch [Mon, 19 Apr 2021 13:55:40 +0000 (15:55 +0200)]
Plug memory leak.

3 years agoConst, once again.
Arnaud Giersch [Mon, 19 Apr 2021 08:16:14 +0000 (10:16 +0200)]
Const, once again.

3 years agoDoc improvement [ci-skip]
Martin Quinson [Mon, 19 Apr 2021 10:54:35 +0000 (12:54 +0200)]
Doc improvement [ci-skip]

3 years agoMerge branch 'master' of framagit.org:simgrid/simgrid
Martin Quinson [Mon, 19 Apr 2021 10:35:48 +0000 (12:35 +0200)]
Merge branch 'master' of framagit.org:simgrid/simgrid

3 years agoFinally rename smpi::Group::actor_pid() back to actor().
Arnaud Giersch [Sun, 18 Apr 2021 19:25:37 +0000 (21:25 +0200)]
Finally rename smpi::Group::actor_pid() back to actor().

3 years agoKill smpi::Group::rank(s4u::Actor*).
Arnaud Giersch [Sun, 18 Apr 2021 19:14:49 +0000 (21:14 +0200)]
Kill smpi::Group::rank(s4u::Actor*).

3 years agoKill smpi::Group::actor(int).
Arnaud Giersch [Sun, 18 Apr 2021 17:01:49 +0000 (19:01 +0200)]
Kill smpi::Group::actor(int).

3 years agoChange smpi::Group::set_mapping to take a pid.
Arnaud Giersch [Sun, 18 Apr 2021 14:29:22 +0000 (16:29 +0200)]
Change smpi::Group::set_mapping to take a pid.

3 years agoAdd assert's to ensure consistency between the two kinds of mapping.
Arnaud Giersch [Sun, 18 Apr 2021 13:25:41 +0000 (15:25 +0200)]
Add assert's to ensure consistency between the two kinds of mapping.

3 years agoDefine new rank_to_pid_map_.
Arnaud Giersch [Sun, 18 Apr 2021 12:50:09 +0000 (14:50 +0200)]
Define new rank_to_pid_map_.

3 years agoLookup for parent process (like in Group::rank(s4u::Actor*).
Arnaud Giersch [Sun, 18 Apr 2021 13:19:44 +0000 (15:19 +0200)]
Lookup for parent process (like in Group::rank(s4u::Actor*).

3 years agoIn smpi::Group, 'index' is in fact a PID. Fix type and rename.
Arnaud Giersch [Sun, 18 Apr 2021 09:29:36 +0000 (11:29 +0200)]
In smpi::Group, 'index' is in fact a PID. Fix type and rename.

3 years agoKill a TODO (-1 is correct for an invalid PID).
Arnaud Giersch [Sun, 18 Apr 2021 19:19:38 +0000 (21:19 +0200)]
Kill a TODO (-1 is correct for an invalid PID).

3 years agoMPI_SOURCE is a rank; src_traced should be a PID.
Arnaud Giersch [Sun, 18 Apr 2021 09:53:53 +0000 (11:53 +0200)]
MPI_SOURCE is a rank; src_traced should be a PID.

3 years agoFix comment.
Arnaud Giersch [Sun, 18 Apr 2021 09:38:55 +0000 (11:38 +0200)]
Fix comment.

3 years agoPass large parameter by const reference.
Arnaud Giersch [Sun, 18 Apr 2021 08:32:08 +0000 (10:32 +0200)]
Pass large parameter by const reference.

3 years agoMinor cleanups (useless stuff).
Arnaud Giersch [Sat, 17 Apr 2021 19:12:19 +0000 (21:12 +0200)]
Minor cleanups (useless stuff).

3 years agoalso requalify mc version of the tesh
Augustin Degomme [Sun, 18 Apr 2021 10:22:44 +0000 (12:22 +0200)]
also requalify mc version of the tesh

3 years agoGroup leak reports by type/file/line (for handles, will see for buffer later).
Augustin Degomme [Sun, 18 Apr 2021 09:54:44 +0000 (11:54 +0200)]
Group leak reports by type/file/line (for handles, will see for buffer later).
And split reporting.

3 years agoSonar polishing.
Arnaud Giersch [Sat, 17 Apr 2021 09:21:27 +0000 (11:21 +0200)]
Sonar polishing.

3 years agoPointer-to-const parameters in smpi::Group.
Arnaud Giersch [Sat, 17 Apr 2021 08:56:54 +0000 (10:56 +0200)]
Pointer-to-const parameters in smpi::Group.

3 years agoReduce code duplication (and fix bug in Group::difference).
Arnaud Giersch [Sat, 17 Apr 2021 08:52:12 +0000 (10:52 +0200)]
Reduce code duplication (and fix bug in Group::difference).

3 years agoA for-loop with 'num' modified in the body is too complex according to Sonar.
Arnaud Giersch [Fri, 16 Apr 2021 22:11:41 +0000 (00:11 +0200)]
A for-loop with 'num' modified in the body is too complex according to Sonar.

3 years agoFix smpi::Group::intersection().
Arnaud Giersch [Fri, 16 Apr 2021 21:26:14 +0000 (23:26 +0200)]
Fix smpi::Group::intersection().

Using 'size2' for controlling the first loop was a bug (spotted by Sonar).

3 years agoFix Group::group_union().
Arnaud Giersch [Fri, 16 Apr 2021 21:21:02 +0000 (23:21 +0200)]
Fix Group::group_union().

Included ranks from group2 were not good.

3 years agoSimplify smpi::Group::difference().
Arnaud Giersch [Fri, 16 Apr 2021 21:36:00 +0000 (23:36 +0200)]
Simplify smpi::Group::difference().

3 years agoReview smpi::Group::*excl() and smpi::Group::*incl().
Arnaud Giersch [Fri, 16 Apr 2021 19:41:27 +0000 (21:41 +0200)]
Review smpi::Group::*excl() and smpi::Group::*incl().

Mostly cosmetic changes.

3 years agoKill redundant member 'size_' from smpi::Group.
Arnaud Giersch [Fri, 16 Apr 2021 20:51:42 +0000 (22:51 +0200)]
Kill redundant member 'size_' from smpi::Group.