Re: [Boost-build] Patch to serialize MPI tests

Subject: Re: [Boost-build] Patch to serialize MPI tests
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2010-05-31 11:25:35

On Mon, 31 May 2010, Belcourt, Kenneth wrote:

>
> On May 29, 2010, at 8:47 PM, Jeremiah Willcock wrote:
>
>> On Fri, 14 May 2010, Matthias Troyer wrote:
>> 
>>> 
>>> On 14 May 2010, at 20:04, Belcourt, Kenneth wrote:
>>>> The attached patch serializes the execution of the MPI tests.  I need to 
>>>> serialize the execution of the MPI tests so that when running Boost 
>>>> regression tests in parallel, we avoid overloading our systems.
>>>> 
>>>> [kbelco_at_wsblade001 tools]$ svn diff
>>>> Index: mpi.jam
>>>> ===================================================================
>>>> --- mpi.jam	(revision 61969)
>>>> +++ mpi.jam	(working copy)
>>>> @@ -493,6 +493,9 @@
>>>>   local num_processes = [ property.select <mpi:processes> : $(properties) 
>>>> ] ;
>>>>   num_processes = $(num_processes:G=) ;
>>>> 
>>>> +    # serialize the MPI tests to avoid overloading systems
>>>> +    JAM_SEMAPHORE on $(target) = <s>mpi-run-semaphore ;
>>>> +
>>>>   # We launch MPI processes using the "mpirun" equivalent specified by 
>>>> the user.
>>>>   LAUNCHER on $(target) =
>>>>     [ on $(target) return $(.mpirun) $(.mpirun_flags) $(num_processes) ] 
>>>> ;
>>>> 
>>>> 
>>>> This has been tested on two systems (Darwin and Linux) without any 
>>>> problems. Okay to commit?
>>> 
>>> As far as I am concerned you can commit this.
>> 
>> Does this patch also serialize the Boost.Graph.Parallel tests?  If it
>> doesn't, is there a way to have those serialized as well?  That may avoid
>> some of the timeouts that often cause the Boost.Graph.Parallel regression
>> tests to fail.
>
> Yes, this patch will serialize any tests that use MPI including 
> graph_parallel.
>
> I did notice an internal compiler error with gcc-4.5 with graph-parallel. 
> Has that problem been reported to gcc?
>
> http://tinyurl.com/2whzwkv

Yes -- <URL:http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44301>.

-- Jeremiah Willcock