This commit repairs the debugger initialization procedure. I am not closing the ticket, however, pending Jeff's review of how it interfaces to the ompi_debugger code he implemented. There were duplicate symbols being created in that code, but not used anywhere. I replaced them with the ORTE-created symbols instead. However, since they aren't used anywhere, I have no way of checking to ensure I didn't break something.
So the ticket can be checked by Jeff when he returns from vacation... :-)
This commit was SVN r18625.
The following Trac tickets were found above:
Ticket 1255 --> https://svn.open-mpi.org/trac/ompi/ticket/1255
After much work by Jeff and myself, and quite a lot of discussion, it has become clear that we simply cannot resolve the infinite loops caused by RML-involved subsystems calling orte_output. The original rationale for the change to orte_output has also been reduced by shifting the output of XML-formatted vs human readable messages to an alternative approach.
I have globally replaced the orte_output/ORTE_OUTPUT calls in the code base, as well as the corresponding .h file name. I have test compiled and run this on the various environments within my reach, so hopefully this will prove minimally disruptive.
This commit was SVN r18619.
* Add specific comments about why we're not setting MPI_ERROR here
This commit was SVN r18616.
The following SVN revision numbers were found above:
r18067 --> open-mpi/ompi@58e31d767e
that can *sometimes* cause problems with "make -j [N>1] install".
Ensure to make the target directory before we copy stuff into it --
read the thread starting here for more details:
http://www.open-mpi.org/community/lists/devel/2008/06/4080.php
This commit was SVN r18570.
We already show_help when we fail to create queues, so I just made the
message a little more verbose such that it may be that OMPI is trying
to use a feature that is not supported on the hardware.
This commit was SVN r18553.
The following Trac tickets were found above:
Ticket 1121 --> https://svn.open-mpi.org/trac/ompi/ticket/1121
1. The send path get shorter. The BTL is allowed to return > 0 to specify that the
descriptor was pushed to the networks, and that the memory attached to it is
available again for the upper layer. The MCA_BTL_DES_SEND_ALWAYS_CALLBACK flag
can be used by the PML to force the BTL to always trigger the callback.
Unmodified BTL will continue to work as expected, as they will return OMPI_SUCCESS
which force the PML to have exactly the same behavior as before. Some BTLs have
been modified: self, sm, tcp, mx.
2. Add send immediate interface to BTL.
The idea is to have a mechanism of allowing the BTL to take advantage of
send optimizations such as the ability to deliver data "inline". Some
network APIs such as Portals allow data to be sent using a "thin" event
without packing data into a memory descriptor. This interface change
allows the BTL to use such capabilities and allows for other optimizations
in the future. All existing BTLs except for Portals and sm have this interface
set to NULL.
This commit was SVN r18551.
than using a single receive callback followed by a switch on the header.
Also fast pathed the matching for small fragments.
This commit was SVN r18549.
that it's a directory. That's good enough to know that the
OpenFabrics kernel drivers have been loaded. If you have no RDMA
devices and don't want to see the OMPI warning about not finding any
devices, then don't start the OpenFabrics kernel drivers.
This commit was SVN r18540.
non-empty. If not, then exit the openib btl silently. This addresses
the case where libibverbs is installed (which is getting more common)
and therefore the openib BTL was built/installed, but the kernel
drivers are not loaded (assumedly because there is no RDMA hardware
present). In this case, "mpirun a.out" will not issue a warning.
There appears to be no good way to definitely tell if there are no
RDMA hardware devices present. For example, if libibverbs/the openib
BTL is installed, there are no RDMA devices present, but the RDMA
hardware kernel drivers ''are'' loaded, OMPI will warn that it was
unable to find suitable devices. This warning is easily eliminated by
unloading the kernel drivers.
This commit was SVN r18530.
The following Trac tickets were found above:
Ticket 1305 --> https://svn.open-mpi.org/trac/ompi/ticket/1305
By consolidating them all into one function, ompi_info can call that function and register the desired variables. This also requires, however, that ompi_info call orte_output_init to avoid generating tons of error messages, so make that adjustment too.
Fixes ticket #1314
In addition, orte_output has a race condition issue whereby calls to orte_output/verbose can occur prior to either the RML being defined/setup, or the HNP being defined. This latter occurs during the initialization of the orte_process_info structure. In both cases, there is no way orte_output can send the output to the HNP. Hence, the message must be simply output locally.
Fixes ticket #1315
This commit was SVN r18524.
* s/port/tcp_port/g where relevant to disambiguate TCP port from
device port
* Rework ipaddrcheck to make it work in the LMC>0 case
This commit was SVN r18482.
The following Trac tickets were found above:
Ticket 1281 --> https://svn.open-mpi.org/trac/ompi/ticket/1281
* Ensure _iwarp.h is always included, or you'll get warnings on
platforms that don't have the RDMACM
* Add skeleton for function descriptions in comments in iwarp.h
This commit was SVN r18477.
opal_ifnext() return -1 upon completion); don't check it against
opal_ifcount() -- the interface indexes aren't necessarily related to
how many interfaces were found.
This commit was SVN r18476.
with something with a different size ... well we segfault. The reason was
that the logic in the PML OB1 call the convertor based on the length
of he data on the wire and not the length of the data that the receiver
expects.
In other words, this is only half a patch :) It fix the problem, but we
still have to make sure the unpack is not called at all when the receiver
expect ZERO bytes.
This commit was SVN r18474.
This commit has the same commit message as r18450, but without the
extra bonus memory corruption that was introduced.
This commit was SVN r18467.
The following SVN revision numbers were found above:
r18450 --> open-mpi/ompi@5295902ebe
The following Trac tickets were found above:
Ticket 1285 --> https://svn.open-mpi.org/trac/ompi/ticket/1285
However, no decision logic is changed by this commit so default behavior has not changed. This
is only selectable by runtime parameters.
This commit was SVN r18464.
Need to release the items and the item list after selecting the collective
modules that are being used. Reviewed by Jeff Squyres.
This commit was SVN r18457.
1. We can't use orte_output in the CPC service thread because orte is
not thread safe
1. Use the macro version sso that they're compiled out of production
builds
This commit was SVN r18455.
* allow receive_queues to be specified in the INI file
* detect when multiple different receive_queues are specified and
gracefully abort
However, accomplishing these goals ran into multiple difficulties. By
putting receive_queues in the INI file:
1. we may not find the value until we've already traversed multiple HCAs
1. we may find multiple different receive_queues values
But since the openib btl initializes as it discovers each HCA/port/LID
(including the BSRQ data), if we find a new receive_queues value late
in the discovery process, then all the BSRQ data that was previously
initialized will likely be invalid. So I had to pull all the BSRQ
initialization out until after the rest of the discovery /
initialization process.
Additionally, note that if the user specifies the MCA parameter
btl_openib_receive_queues, it trumps whatever was in the INI file. So
in this case, there can never be a receive_queues conflict. This
commit does the following (Jon wrote part of this, too):
* adapt _ini.c to accept the "receive_queues" field in the file
* move 90% of _setup_qps() from _ini.c to _component.c
* move what was left of _setup_qps() into the main
_register_mca_params() function
* adapt init_one_hca() to detect conflicting receive_queues values
from the INI file
* after the _component.c loop calling init_one_hca():
* call setup_qps() to parse the final receive_queues string value
* traverse all resulting btls and initialize their HCAs (if they
weren't already): setup some lists and call prepare_hca_for_use()
I tested this code on a dual-HCA system where I artificially put in
differing receive_queues values in the INI file for the two different
types of HCAs that I have and it all seemed to work.
This commit was SVN r18450.
The following Trac tickets were found above:
Ticket 1285 --> https://svn.open-mpi.org/trac/ompi/ticket/1285
There are more details in the code regarding how to use this feature.
Also shift a few of the orte_output back to opal_output. I'm experiencing an odd problem with locks in the oob/tcp when using orte_output. I haven't had time to track it down yet.
This commit was SVN r18439.
such, the commit message back to the master SVN repository is fairly
long.
= ORTE Job-Level Output Messages =
Add two new interfaces that should be used for all new code throughout
the ORTE and OMPI layers (we already make the search-and-replace on
the existing ORTE / OMPI layers):
* orte_output(): (and corresponding friends ORTE_OUTPUT,
orte_output_verbose, etc.) This function sends the output directly
to the HNP for processing as part of a job-specific output
channel. It supports all the same outputs as opal_output()
(syslog, file, stdout, stderr), but for stdout/stderr, the output
is sent to the HNP for processing and output. More on this below.
* orte_show_help(): This function is a drop-in-replacement for
opal_show_help(), with two differences in functionality:
1. the rendered text help message output is sent to the HNP for
display (rather than outputting directly into the process' stderr
stream)
1. the HNP detects duplicate help messages and does not display them
(so that you don't see the same error message N times, once from
each of your N MPI processes); instead, it counts "new" instances
of the help message and displays a message every ~5 seconds when
there are new ones ("I got X new copies of the help message...")
opal_show_help and opal_output still exist, but they only output in
the current process. The intent for the new orte_* functions is that
they can apply job-level intelligence to the output. As such, we
recommend that all new ORTE and OMPI code use the new orte_*
functions, not thei opal_* functions.
=== New code ===
For ORTE and OMPI programmers, here's what you need to do differently
in new code:
* Do not include opal/util/show_help.h or opal/util/output.h.
Instead, include orte/util/output.h (this one header file has
declarations for both the orte_output() series of functions and
orte_show_help()).
* Effectively s/opal_output/orte_output/gi throughout your code.
Note that orte_output_open() takes a slightly different argument
list (as a way to pass data to the filtering stream -- see below),
so you if explicitly call opal_output_open(), you'll need to
slightly adapt to the new signature of orte_output_open().
* Literally s/opal_show_help/orte_show_help/. The function signature
is identical.
=== Notes ===
* orte_output'ing to stream 0 will do similar to what
opal_output'ing did, so leaving a hard-coded "0" as the first
argument is safe.
* For systems that do not use ORTE's RML or the HNP, the effect of
orte_output_* and orte_show_help will be identical to their opal
counterparts (the additional information passed to
orte_output_open() will be lost!). Indeed, the orte_* functions
simply become trivial wrappers to their opal_* counterparts. Note
that we have not tested this; the code is simple but it is quite
possible that we mucked something up.
= Filter Framework =
Messages sent view the new orte_* functions described above and
messages output via the IOF on the HNP will now optionally be passed
through a new "filter" framework before being output to
stdout/stderr. The "filter" OPAL MCA framework is intended to allow
preprocessing to messages before they are sent to their final
destinations. The first component that was written in the filter
framework was to create an XML stream, segregating all the messages
into different XML tags, etc. This will allow 3rd party tools to read
the stdout/stderr from the HNP and be able to know exactly what each
text message is (e.g., a help message, another OMPI infrastructure
message, stdout from the user process, stderr from the user process,
etc.).
Filtering is not active by default. Filter components must be
specifically requested, such as:
{{{
$ mpirun --mca filter xml ...
}}}
There can only be one filter component active.
= New MCA Parameters =
The new functionality described above introduces two new MCA
parameters:
* '''orte_base_help_aggregate''': Defaults to 1 (true), meaning that
help messages will be aggregated, as described above. If set to 0,
all help messages will be displayed, even if they are duplicates
(i.e., the original behavior).
* '''orte_base_show_output_recursions''': An MCA parameter to help
debug one of the known issues, described below. It is likely that
this MCA parameter will disappear before v1.3 final.
= Known Issues =
* The XML filter component is not complete. The current output from
this component is preliminary and not real XML. A bit more work
needs to be done to configure.m4 search for an appropriate XML
library/link it in/use it at run time.
* There are possible recursion loops in the orte_output() and
orte_show_help() functions -- e.g., if RML send calls orte_output()
or orte_show_help(). We have some ideas how to fix these, but
figured that it was ok to commit before feature freeze with known
issues. The code currently contains sub-optimal workarounds so
that this will not be a problem, but it would be good to actually
solve the problem rather than have hackish workarounds before v1.3 final.
This commit was SVN r18434.
start sending fragment by copy in/out before ACK is received as we don't
know pointer to receive request yet.
Pipeline protocol sometimes doesn't send ACK though, so this case is still
broken.
This commit was SVN r18423.
* Remove the opal_only option. This was suffering from bit rot, and no one uses it. It can be added back fairly easily if wanted.
* Cleanup metadata interactions at the local level.
* Touch up some of the INC funcitonality (fix typos and a minor ordering issue)
This commit was SVN r18416.
The iWARP subnet ID determination should not be in the RDMACM cpc, as
it was in the preversion, as this violates the cpc abstract that is
present throughout the code. Also, this patch uses the opal_list_t
data struct instead of using its own linked lists.
This attempt includes *iwarp.c and *iwarp.h
This commit was SVN r18414.
the btl_openib_iwarp.c and btl_openib_iwarp.h files.
This commit was SVN r18410.
The following SVN revision numbers were found above:
r18409 --> open-mpi/ompi@056bbb68c8
The iWARP subnet ID determination should not be in the RDMACM cpc, as
it was in the preversion, as this violates the cpc abstract that is
present throughout the code. Also, this patch uses the opal_list_t
data struct instead of using its own linked lists.
This commit was SVN r18409.
All spawned procs must decode the port of the spawning process so they can communicate in direct routed mode.
This fixes comm_spawn for all routing modes.
This commit was SVN r18395.
This enables subnet differientation for iWARP devices, and rearrange
initilization so that the services are available when they are needed.
This commit was SVN r18393.
If there is no IP Address, have rdmacm log the correct error and let
another cpc have a go at it. This is being done by splitting off the
IP address checking logic for the modex message creation, and having
it log the correct error in the error case.
This commit was SVN r18392.
For iWARP, the TCP connection is tied to the QP once the QP is in RTS.
And destroying the QP is thus tied to connection teardown for iWARP.
This is a key distinction from IB, I think. Anyway, to destroy the
connection in iWARP you must move the QP out of RTS, either into CLOSING
for a nice graceful close, or to ERROR if you want to be rude. In both
cases, all pending non-completed SQ and RQ WRs must be flushed.
This patch ignores all flush errors reaped by the cq and removes an
earlier attempt to work around this in the rdmacm cpc.
This commit was SVN r18388.
http://www.open-mpi.org/community/lists/devel/2008/04/3779.php
{{{
svn merge -r 18276:18380 https://svn.open-mpi.org/svn/ompi/tmp-public/jjh-mca-play .
}}}
Any components not in the trunk, but in one of the effected frameworks *must* be
updated. Contact the list, look at the RFC, or look at the diff for how to do this.
Sorry for the early commit of this, but I wanted to get it in today (per RFC) and
didn't know if I would have a chance later today.
This commit was SVN r18381.
If there are multiple QP's, RDMACM will not send a message if the
qpnum != 0. In doing so, it will log an error unecessarily. This
removes that.
This commit was SVN r18363.
Add the logic to support using port numbers, instead of simply using
the IP address of the sending node to determine which endpoint to
connect. Since each process calls the cpc query function, it will
generate its own port to listen on thus enablign this to work.
This commit was SVN r18362.
Update the rsh tree spawn capability so we spawn the next wave of daemons before launching our own local procs.
Add an ability to encode nodenames for large clusters with contiguous node name numbering schemes - this allows communication of all node names in a few bytes instead of tens-of-bytes/node.
This commit was SVN r18338.
The endpoint may be appended to list during XOOB connection bring up.
This commit was SVN r18328.
The following SVN revision numbers were found above:
r17940 --> open-mpi/ompi@ebfdd133f5
expected one. It doesn't necessarily means the message is duplicated,
it can simply signify the message is out of sequence and the counter
overflowed.
This commit was SVN r18323.
The following SVN revision numbers were found above:
r18274 --> open-mpi/ompi@73c9de3af9
The problem was caused by a bad ordering between the restart of the ORTE level tcp connections (in the OOB - out-of-band communication) and the Open MPI level tcp connections (BTLs). Before this commit ORTE would shutdown and restart the OOB completely before the OMPI level restarted its tcp connections. What would happen is that a socket descriptor used by the OMPI level on checkpoint was assigned to the ORTE level on restart. But the OMPI level had no knowledge that the socket descriptor it was previously using has been recycled so it closed it on restart. This caused the ORTE level to break as the newly created socket descriptor was closed without its knowledge.
The fix is to have the OMPI level shutdown tcp connections, allow the ORTE level to restart, and then allow the OMPi level to restart its connections. This seems obvious, and I'm surprised that this bug has not cropped up sooner. I'm confident that this specific problem has been fixed with this commit.
Thanks to Eric Roman and Tamer El Sayed for their help in identifying this problem, and patience while I was fixing it.
* Add a new state {{{OPAL_CRS_RESTART_PRE}}}. This state identifies when we are on the down slope of the INC (finalize-like) which is useful when you want to close, but not reopen a component set for fear of interfering with a lower level.
* Use this new state in OMPI level coordination. Here we want to make sure to play well with both the OMPI/BTL/TCP and ORTE/OOB/TCP components.
* Update ft_event functions in PML and BML to handle the new restart state.
* Add an additional flag to the error output in OOB/TCP so we can see what the socket descriptor was on failure as this can be helpful in debugging.
This commit was SVN r18276.
{{{
svn merge -r 18218:18240 https://svn.open-mpi.org/svn/ompi/tmp/jjh-scratch .
}}}
Contains:
* Primarily a fix for a user reported problem where a cached file descriptor is causing a SIGPIPE on restart.
* Cleanup some small memory leaks from using mca_base_param_env_var() - Thanks Jeff
* Cleanup ORTE FT tool compilation in non-FT builds - Thanks Tim P.
* Cleanup mpi interface with missplaced {{{OPAL_CR_ENTER_LIBRARY}}} - Thanks Terry
* Some other sundry cleanup items all dealing with C/R functionality in the trunk.
This commit was SVN r18241.
Fix the ompi-server -h cmd line option so it actually tells you something!
Add two new testing codes to the orte/test/mpi area: accept and connect.
This commit was SVN r18176.
Rational (taken from the code):
/* This is PITA. We never know which source address an
* incoming/outgoing packet will have, so even with
* btl_tcp_if_include/exclude on the remote end, we
* might get a different source address.
*
* If this address isn't included in btl_proc->proc_addrs,
* we would erroneously drop the connection
*/
merge -r18165:18167 to the trunk.
This commit was SVN r18169.
The following SVN revisions from the original message are invalid or
inconsistent and therefore were not cross-referenced:
r18165
r18167
mca_btl_openib_endpoint_post_rr_nolock is freeing the endpoint lock on
the error case, but most/all of the functions calling this free the lock
regardless of its error case. Thus resulting is a double free of the
lock.
This commit was SVN r18131.
wring directory. The UH copyrights do belong into this file (i.e. because of
the fix which is in the 1.2 branch, the UH copyright notes are in the header
there alreary), but I want to have the proper log for that.
This commit was SVN r18124.
to undo 1822).
The verification of recvcount==0 and rank = root was braking
inter-communicator scatter, since the root (root==MPI_ROOT) might very well
have recvcount=0. The same fix has been applied to gather.c just the other way
round.
Fixes the bug reported on the mainling list by Martin Audet. If there is a
1.2.7 this fix might be worthwhile porting it over.
Please note, that while the test works now for basic and for inter, we get a
0byte malloc warning from the inter module, which we still have to fix in a
separate patch.
This commit was SVN r18123.
inter-communicator scatter, since the root (root==MPI_ROOT) might very well
have recvcount=0. The same fix has been applied to gather.c just the other way
round.
Fixes the bug reported on the mainling list by Martin Audet. If there is a
1.2.7 this fix might be worthwhile porting it over.
Please note, that while the test works now for basic and for inter, we get a
0byte malloc warning from the inter module, which we still have to fix in a
separate patch.
This commit was SVN r18122.
Benefits of this function will be using less memory, compactness and better performance. Thanks to George.
Keep the old memchecker function as well in case of convertor is not available.
This commit was SVN r18084.
selected, but before we check whether we have been spawned. This is necessary
in order for the hierarch collective component to work. This component might
create new communicators already in MPI_Init(), which then have to execute the
dpm.mark_dyncomm function. If dpm is not initialized at that point, we
segfault.
This commit was SVN r18045.
1. applied prefix rule to functions and variables of RMAPS rank_file component
2. cleaned ompi_mpi_init.c from paffinity code
3. paffinity code moved to new opal/mca/paffinity/base/paffinity_base_service.c file
4. added opal_paffinity_slot_list mca parameter
This commit was SVN r18019.
sender_based.h is now split in two files, to solve cyclic .h files inclusion.
Most macros are now inline functions.
Variable names have been changed from places to places.
Various other small things...
This commit was SVN r17996.
The bug was a race condition in the barrier operation that caused the barrier in MPI_Finalize to fail on very short programs.
Scalaiblity was improved by using the daemons to aggregate modex and barrier messages before sending them to the rank=0 proc. Improvement is proportional to ppn, of course, but there really wasn't a scaling problem at low ppn anyway. This modification also paves the way for better allgather operations since now all the data for each node is sitting at the daemon level, and the daemons are now aware that a collective operation on the OOB is underway (so they -can- participate in a collective of their own to support it).
Also added better diagnostics to map out the timing associated with MPI_Init - turned on by -mca orte_timing 1.
This commit was SVN r17988.
"all", not just the first 3 chars (i.e., if someone sets the value
"allfoo", we should still error).
This commit was SVN r17981.
The following SVN revision numbers were found above:
r17980 --> open-mpi/ompi@b3ef774d46
r17956 broke the ability for the user to override the 'opal_event_include'
parameter. This commit checks to see if the user specified a value before
forcing the "all" value on the event engine.
This commit fixes Checkpoint/Restart support in the trunk which requires
this feature.
This commit was SVN r17980.
The following SVN revision numbers were found above:
r17956 --> open-mpi/ompi@763218e754
Event var_deref_model: Variable "array_of_integers" tracked as NULL was
passed to a function that dereferences it. [model]
The arrays passed down type_get_contents may be NULL, only iff max_* is 0...
If the max_* parameter does not fit, an error is returned, anyhow.
One could improve the checks of MPI_PARAM_CHECK, but to be on the
safe side, fix in dt_args.c.
This commit was SVN r17974.
Event var_deref_op: Variable "requests" tracked as NULL was
dereferenced.
Only check requests[i] for NULL, if requests is != NULL itself.
This commit was SVN r17973.
Event uninit_use_in_call: Using uninitialized value "tag" in call to
function "(ompi_dpm).connect_accept" and others
The tag is set and used in get_rport only on root...
This commit was SVN r17972.
mechanisms (such as epoll) if someone (ompi_mpi_init()) requests
otherwise. See big comment in opal/event/event.c for a full
explanation.
This commit was SVN r17956.
Clarify the setting of send_first in the mpi bindings (trivial, i know, but helpful)
Remove the extra xcast of child contact info to the parent job.
This commit was SVN r17952.
initialized. For example, there is a period of time during
ompi_mpi_init when orte_initialized==true, but
ompi_mpi_initialized==false (and therefore communicators are not setup
yet, etc.).
This commit was SVN r17937.
Only one place used the user name field - session_dir, when formulating the name of the top-level directory. Accordingly, the code for getting the user's id has been moved to the session_dir code.
This commit was SVN r17926.
some cleanups and standardizations in the various */tools/*/
Makefile.am files. This commit:
* Somewhat simplify the tool Makefile.am's
* Makes the tool Makefile.am's consistent with each other (do similar
actions in similar ways)
* Update the tool Makefile.am's to remove old kruft that was required
by older versions of AM (trunk requires AM >=1.10)
This commit was SVN r17921.
still-broken trunk build on common platforms (e.g., 64 bit Linux
RHEL4U4), I think it's clear that this code is not ready for
prime-time.
I'm backing out all the commits in the trunk/ompi/op tree from r17901
onwards. This code can be re-committed when compiles and runs on
common platforms.
cd ompi/op
svn merge -r 17907:17900 https://svn.open-mpi.org/svn/ompi/trunk/ompi/op .
This commit was SVN r17908.
The following SVN revision numbers were found above:
r17901 --> open-mpi/ompi@b9520e61dc
operations. Added to the reduction operations a set of reduction
functions that take 2 input buffers and one output buffer to avoid
some extra memory copies. These can't be used with user defined
operations. The intel c collective suite passes both original, and
new (new, not the user defined operations).
This commit was SVN r17901.
portals btl has ownership and therefor didn't free the frag as it should) this
causes leakage and hangs in MPI_Finalize.
Also added a bit more debugging.
This commit was SVN r17900.
* Fix an error message to correctly display if we were before
MPI_INIT or after MPI_FINALIZE (refs trac:1243)
This commit was SVN r17873.
The following Trac tickets were found above:
Ticket 1243 --> https://svn.open-mpi.org/trac/ompi/ticket/1243
without calling a get or put. So, just keep it here until a better solution is
found.
This commit was SVN r17872.
The following SVN revision numbers were found above:
r17857 --> open-mpi/ompi@d460ccfbf9
work if
- visibility is enabled (now enabled by default)
- sparse groups by default.
Thanks for Mohamad locating the problem, and Rainer for locating the solution.
This commit was SVN r17809.
