The primary change that underlies all this is in the OOB. Specifically, the problem in the code until now has been that the OOB attempts to resolve an address when we call the "send" to an unknown recipient. The OOB would then wait forever if that recipient never actually started (and hence, never reported back its OOB contact info). In the case of an orted that failed to start, we would correctly detect that the orted hadn't started, but then we would attempt to order all orteds (including the one that failed to start) to die. This would cause the OOB to "hang" the system.
Unfortunately, revising how the OOB resolves addresses introduced a number of additional problems. Specifically, and most troublesome, was the fact that comm_spawn involved the immediate transmission of the rendezvous point from parent-to-child after the child was spawned. The current code used the OOB address resolution as a "barrier" - basically, the parent would attempt to send the info to the child, and then "hold" there until the child's contact info had arrived (meaning the child had started) and the send could be completed.
Note that this also caused comm_spawn to "hang" the entire system if the child never started... The app-failed-to-start helped improve that behavior - this code provides additional relief.
With this change, the OOB will return an ADDRESSEE_UNKNOWN error if you attempt to send to a recipient whose contact info isn't already in the OOB's hash tables. To resolve comm_spawn issues, we also now force the cross-sharing of connection info between parent and child jobs during spawn.
Finally, to aid in setting triggers to the right values, we introduce the "arith" API for the GPR. This function allows you to atomically change the value in a registry location (either divide, multiply, add, or subtract) by the provided operand. It is equivalent to first fetching the value using a "get", then modifying it, and then putting the result back into the registry via a "put".
This commit was SVN r14711.
* Move ipv6comat.h code into opal_config_bottom.h and change into some
more intelligent testing of structures
* Change opal's if interface to use sockaddr instead of sockaddr_storage,
as the RFCs suggest we do
* Move the networking code in opal that isn't directly related to if
detection into net.h
* Add quicky function to get the port out of either a sockaddr_in
or sockaddr_in6, saving a bunch of code in the oob.
* Update TCP oob and btl with new interface
This commit was SVN r14679.
assumptions in the FT restart code for the ORTE layer.
This fixes those problems by having the RML completely shutdown and
restart the OOB framework (instead of just the module as before).
This makes it much easier to manage, and maintainable as the OOB
changes in the future.
The SDS now does communication as part of its startup procedure, so
we need to make sure we restart the RML before the SDS so that it can
communicate properly.
OOB base [close|open] used a static bool to determine if they have
been called previously or not. I needed to expose this boolean so
that I can close() then open() the oob base in the restart procedure.
The functionality has not changed, we just now have the ability to
open/close the framework as many times as we need to as long as we
always call them in that order. (So calling open twice in a row is not allowed
as before, it is only allowed if you open(), close(), then open() again).
Things seem to be working now.
This commit was SVN r14515.
- make opal_sockaddr2str() take a sockaddr_storage instead of a sockaddr_in6
so that it works for IPv4 and IPv6 addresses, and remove a whole bunch
of #ifs in the OOOB code.
- Fix a compiler warning in the TCP BTL due to run-time determined
array size by making it a dynamicly allocated array.
- Fix the unpacking code of IPv4 addresses when using IPv6 support, so
that the address is in the correct location (instead of in an IPv6
structure, use an IPv4 structure). Refs trac:1005.
This commit was SVN r14514.
The following Trac tickets were found above:
Ticket 1005 --> https://svn.open-mpi.org/trac/ompi/ticket/1005
* Remove the connect() timeout code, as it had some nasty race conditions
when connections were established as the trigger was firing. A better
solution has been found for the cluster where this was needed, so just
removing it was easiest.
* When a fatal error (too many connection failures) occurs, set an error
on messages in the queue even if there isn't an active message. The
first message to any peer will be queued without being active (and
so will all subsequent messages until the connection is established),
and the orteds will hang until that first message completes. So if
an orted can never contact it's peer, it will never exit and just sit
waiting for that message to complete.
* Cover an interesting RST condition in the connect code. A connection
can complete the three-way handshake, the connector can even send
some data, but the server side will drop the connection because it
can't move it from the half-connected to fully-connected state because
of space shortage in the listen backlog queue. This causes a RST to
be received first time that recv() is called, which will be when waiting
for the remote side of the OOB ack. In this case, transition the
connection back into a CLOSED state and try to connect again.
* Add levels of debugging, rather than all or nothing, each building on
the previous level. 0 (default) is hard errors. 1 is connection
error debugging info. 2 is all connection info. 3 is more state
info. 4 includes all message info.
* Add some hopefully useful comments
This commit was SVN r14261.
OPAL_FREE_LIST_WAIT/RETURN will not use locks in a non-threaded build
conditionaly use locks if non-threaded around the OPAL_FREE_LIST_WAIT/RETURN
seems to fix the issue
Tested at 4K processes and seems to work..
This commit was SVN r14135.
listen thread, but we're not the HNP. This is better than not starting up
any listen mode, which is what we were doing before :/
This commit was SVN r14133.
This merge adds Checkpoint/Restart support to Open MPI. The initial
frameworks and components support a LAM/MPI-like implementation.
This commit follows the risk assessment presented to the Open MPI core
development group on Feb. 22, 2007.
This commit closes trac:158
More details to follow.
This commit was SVN r14051.
The following SVN revisions from the original message are invalid or
inconsistent and therefore were not cross-referenced:
r13912
The following Trac tickets were found above:
Ticket 158 --> https://svn.open-mpi.org/trac/ompi/ticket/158
its bigger than the timeout for the connect() call, just don't register
the handler by default and fall back to connect() timing out. Should give
much happier performance on big clusters.
This commit was SVN r13639.
the connect() timeout, so that we'll use that rather than our own timeout by
defualt. There timeout was set low for Big Red, but causes problems for very
large clusters, as there's no way to wire them up in 10 seconds most of the
time.
This commit was SVN r13062.
I know it's just a technicality, but it is time to address such things rather than just letting them continue to propagate. :-)
This commit was SVN r12954.
I found only two places that were looking at the tokens:
1. the odls - we used the tokens to separately process the globals container data from everything else. In this case, I left the subscription that returned the globals data alone, but "stripped" the subscription that returned the launch data for the procs. These subscriptions have nothing to do with the xcast message.
2. the pml_base_modex - the callback function was getting process names from the returned tokens. Actually, this function was doing a very bad thing - it was assuming that the first token returned was *always* the process name. This is currently true, but is one of those assumptions that someone could have easily changed - and suddenly found the system inexplicably failing. I modified the function to (a) get the name sent back to us, (b) "stripped" the value structures of tokens and segment strings, and (c) correctly obtained process names from the returned values. I also reindented the heck out of the code so it was legible (at least, to my old eyes).
This commit was SVN r12813.
Accordingly, there are new APIs to the name service to support the ability to get a job's parent, root, immediate children, and all its descendants. In addition, the terminate_job, terminate_orted, and signal_job APIs for the PLS have been modified to accept attributes that define the extent of their actions. For example, doing a "terminate_job" with an attribute of ORTE_NS_INCLUDE_DESCENDANTS will terminate the given jobid AND all jobs that descended from it.
I have tested this capability on a MacBook under rsh, Odin under SLURM, and LANL's Flash (bproc). It worked successfully on non-MPI jobs (both simple and including a spawn), and MPI jobs (again, both simple and with a spawn).
This commit was SVN r12597.
seed value have something set to true. Allow selection of the listen
type to thread if (and only if) the process is the HNP...
This commit was SVN r12105.
__DARWIN_ALIGN_POWER define from the last release of the OS X compiler
toolchain. The bug in net/if.h, however, is still there. So look
for the hints that we're on a 64 bit Apple PowerPC instead.
* If we don't find a buffer size that works by 10MB, we're never
going to. So add some code to limit the buffer size we'll try
so that we don't fall into an infinite loop
* Detect errors in opal_ifcount in the oob init code
Refs trac:420
This commit was SVN r11825.
The following Trac tickets were found above:
Ticket 420 --> https://svn.open-mpi.org/trac/ompi/ticket/420
Each 's' partition has its own TCP network. It's fine to use this network for jobs that fit inside the partition, but the TCP OOB errors when trying to connect across two partitions, because there are two disjoint networks. Each node also has another TCP network connecting ALL nodes together.
So the solution is to actually try all the available TCP interfaces on a node, instead of erroring when the first one fails.
Also, the default TCP connect() timeout is way too long (5 minutes) - use our own timeout mechanism, with the timeout value expressed as an MCA parameter.
This commit was SVN r11718.
- use the OPAL functions for PATH and environment variables
- make all headers C++ friendly
- no unamed structures
- no implicit cast.
Plus a full implementation for the orte_wait functions.
This commit was SVN r11347.
Clean up the remainder of the size_t references in the runtime itself. Convert to orte_std_cntr_t wherever it makes sense (only avoid those places where the actual memory size is referenced).
Remove the obsolete oob barrier function (we actually obsoleted it a long time ago - just never bothered to clean it up).
I have done my best to go through all the components and catch everything, even if I couldn't test compile them since I wasn't on that type of system. Still, I cannot guarantee that problems won't show up when you test this on specific systems. Usually, these will just show as "warning: comparison between signed and unsigned" notes which are easily fixed (just change a size_t to orte_std_cntr_t).
In some places, people didn't use size_t, but instead used some other variant (e.g., I found several places with uint32_t). I tried to catch all of them, but...
Once we get all the instances caught and fixed, this should once and for all resolve many of the heterogeneity problems.
This commit was SVN r11204.
r10841, so revert it (and it's fixes) out. Will bring back once cleaned up from
the code used in the tbird experiment
This commit was SVN r10991.
The following SVN revision numbers were found above:
r10841 --> open-mpi/ompi@dfa1221c3b
than $(LN_S). This causes problems with with Windows and probably
elsewhere (re: #200). So use a slightly different trick to get the
right header selected for the MEMCPY and TIMER components.
* Using the same trick used to solve the AC_CONFIG_LINKS problem,
stop using a separate header file for direct calling in the
PML and MTL. This lets me remove some icky code in ompi_mca.m4
that was more fragile than I really liked.
This commit was SVN r10841.
Since Jeff and I are going to a branch for T-bird, we have restored the trunk to its prior state to avoid any possibility of disturbing it.
This commit was SVN r10774.
Please report any abnormal behavior during launch, though, as we would like to understand what (if any) impact is seen. I couldn't see any on small jobs (the modulo functions render this number down pretty low).
This commit was SVN r10763.
- move files out of toplevel include/ and etc/, moving it into the
sub-projects
- rather than including config headers with <project>/include,
have them as <project>
- require all headers to be included with a project prefix, with
the exception of the config headers ({opal,orte,ompi}_config.h
mpi.h, and mpif.h)
This commit was SVN r8985.
intended to include the OMPI_DEBUG_ZERO call).
These debugging statements should not have affected correcteness
because the value of 78 will be overridden in the read() and the
assert()/abort() stuff will only be triggered on an error which should
never happen (i.e., the error should have been handled by the prior if
conditional). But still, thise code should not be there.
This commit was SVN r8649.
The following SVN revision numbers were found above:
r8643 --> open-mpi/ompi@a6b869ed68
with the mutex locked and as this function will call oob_send which will call the lookup again
... we will deadlock as the mutex is already lock. The solution is to release the mutex before
going into the subscription. Then of course the logic to remote the item when something went
wrong with the subscrition is a little bit more complex.
This commit was SVN r7429.
