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From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2007-09-05 21:04:51

Greg: sorry for the delay in replying...

I am not the authority on this stuff; can George / Brian / Terry /
Brad / Gleb reply on this issue?


On Aug 28, 2007, at 12:57 PM, Greg Watson wrote:

>> Note that this is *NOT* well tested. There is work going on right
>> now to make the OMPI layer be able to support MPI_THREAD_MULTIPLE
>> (support was designed in from the beginning, but we haven't ever done
>> any kind of comprehensive testing/stressing of multi-thread support
>> such that it is pretty much guaranteed not to work), but it is
>> occurring on the trunk (i.e., what will eventually become v1.3) --
>> not the v1.2 branch.
>>> The interfaces I'm calling are:
>>> opal_event_loop()
>> Brian or George will have to answer about that one...
>>> opal_path_findv()
>> This guy should be multi-thread safe (disclaimer: haven't tested it
>> myself); it doesn't rely on any global state.
>>> orte_init()
>>> orte_ns.create_process_name()
>>> orte_iof.iof_subscribe()
>>> orte_iof.iof_unsubscribe()
>>> orte_schema.get_job_segment_name()
>>> orte_gpr.get()
>>> orte_dss.get()
>>> orte_rml.send_buffer()
>>> orte_rmgr.spawn_job()
>>> orte_pls.terminate_job()
>>> orte_rds.query()
>>> orte_smr.job_stage_gate_subscribe()
>>> orte_rmgr.get_vpid_range()
>> Note that all of ORTE is *NOT* thread safe, nor is it planned to be
>> (it just seemed way more trouble than it was worth). You need to
>> serialize access to it.
> Does that mean just calling OPAL_THREAD_LOCK() and OPAL_THREAD_UNLOCK
> () around each?

Jeff Squyres
Cisco Systems