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On Aug 13, 2010, at 12:00 AM, Ralph Castain wrote:
> This sounds like excellent progress! Jeff and others know much more about MTT
> than I do, so I'll leave that question to them.
>
> You have two approaches to the mmap issue. Easiest for now would be to simply
> disable the shared memory component - you can either turn it off at run-time
> with -mca btl ^sm, or you can direct that it not even be built with
> -enable-mca-no-build=btl-sm when configuring OMPI.
>
> I would think your TCP comm would then allow the two procs sharing a host to
> communicate. Can you give that a try?
>
> I'd be happy to begin reviewing the changes, and can help integrate them back
> into the OMPI trunk, when you feel ready.
>
>
> On Aug 12, 2010, at 9:35 PM, 张晶 wrote:
>
>> Hi Ralph,Jeff and all
>>
>> It is a good news that I can almost run the openmpi on the vxworks
>> ,but there are also still some bugs.The final test which has passed is:
>> Rank 0 process calls mpi_send running on the host 0,rank 1 process
>> calls mpi_recv running on the host 1. It works well .For the absence of the
>> mmap in the vxworks ,which is used in the btl sm component , it still fails
>> running two processes in the same host.
>> The difference between the vxworks and unix is the real trouble .For
>> example pipe(),fork(),exec(),socketpair(),fcntl() ,sshd and so no are not
>> implemented in the vxworks .Replacing these lost with the correspond
>> functions is the key work of the migration.After having a clear
>> understanding of the function of rsh component ,I write a simple daemon and
>> client to launch the orted for the calling of the rlogin() in the user space
>> of the vxworks complain.
>> I think there are still many test needed to be launching .Maybe I'd
>> better to look into MTT.
>>
>> 在 2010年7月8日 上午9:54，张晶 <[email protected]>写道：
>> Thank you ,Squyres , it is really useful !
>>
>> 在 2010年7月7日 下午7:22，Jeff Squyres <[email protected]>写道：
>> On Jul 6, 2010, at 10:48 PM, 张晶 wrote:
>>
>> > 1.If I write a rlogin component ,
>>
>> Is the command line of rlogin that much different than that of rsh/ssh? For
>> example, can you just s/rsh/rlogin/ on the overall command line and have it
>> just work?
>>
>> If so, I suspect that tweaking the rsh plm might be far simpler than having
>> your own component.
>>
>> > can I just login in the node in the cluster and launch the process . If
>> > it is ,what the role the odls plays ??
>>
>> ODLS = ORTE Daemon Local launch Subsystem.
>>
>> PLM = Process Lifecycle Management.
>>
>> Meaning: the PLM is used to launch orteds (more on this below) across
>> multiple nodes. The ODLS is used to launch processes locally from the orted
>> (e.g., via POSIX fork/exec).
>>
>> > 2.what is orted? Should the orted exists in every node and functions as a
>> > node process launch proxy ?
>>
>> Yes. The orted = ORTE daemon. It is almost always the first thing launched
>> on each node and acts as a proxy for launching, killing, and monitoring the
>> user's applications on each node. It also does other control kinds of
>> things, like relay stdout/stderr back up to the HNP (more below), etc.
>>
>> > 3,what is hnp ? Is every job has only one hnp ,and when I use mpirun , the
>> > mpirun process is hnp ??
>>
>> HNP = head node process, meaning mpirun (or actually, orterun -- mpirun is a
>> symlink to orterun). The HNP functions as an orted as well, so it can use
>> the ODLS to launch processes locally, etc.
>>
>> Ralph can provide more detail on all of the above, but these are the basics.
>>
>> --
>> Jeff Squyres
>> [email protected]
>> For corporate legal information go to:
>> http://www.cisco.com/web/about/doing_business/legal/cri/
>>
>>
>>
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>>
>>
>> --
>> 张晶
>>
>>
>>
>> --
>> 张晶
>> _______________________________________________
>> devel mailing list
>> [email protected]
>> http://www.open-mpi.org/mailman/listinfo.cgi/devel
>
> _______________________________________________
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--
Jeff Squyres
[email protected]
For corporate legal information go to:
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