[mpich-discuss] 答复: how to connect MPI_Send with CH3_isend

[Darius Buntinas]

The ability to use different networks for different
destinations is a feature we intend to add, but it's not
yet implemented.  Nemesis does use shared-memory communication
for intranode communication and the network for internode.

There are several internal interfaces for porting MPICH2 to new
platforms or interconnects.  This paper has a description of the
interfaces:
http://www.mcs.anl.gov/~buntinas/papers/europvmmpi06-nemesis.pdf

If you're interested in porting MPICH2 to a new interconnect,
you should write a nemesis network module.  The API is described
here:
http://wiki.mcs.anl.gov/mpich2/index.php/Nemesis_Network_Module_API

I hope this helps,

-d






On 11/12/2009 11:29 PM, yaohui wrote:
> Thank you very much!
> 	Finally I got a response!
> I am doing some researches on adding HT(HyperTransport) into mpich2,I am
> just wandering when we configure the mpich2 with 
> 			./configure ¨Cwith-device=ch3:sock (ch3:nemesis)
> that means we definitely select one network as the channel to communicate,
> but if there are any possibilities that you can dynamic 
> control the network we use ,sometimes messages go through Ethernet,
> sometimes go through IB. could you give me some materials 
> to understand what's the difference between ~/ch3/channel/sock
> ,~/ch3/channel/sctp ~,~/ch3/channel/nemesis/nemesis/net_mod/tcp_module
> , ~/ch3/channel/nemesis/nemesis/net_mod/sctp_module,
> ~/ch3/channel/nemesis/nemesis/net_mod/ib_module
>  
> Thank you again!
>  
> Best Wishes!
> -----ÓʼþÔ­¼þ-----
> ·¢¼þÈË: mpich-discuss-bounces at mcs.anl.gov [mailto:mpich-discuss-bounces at mcs.
> anl.gov] ´ú±í Darius Buntinas
> ·¢ËÍʱ¼ä: 2009Äê11ÔÂ12ÈÕ 23:30
> ÊÕ¼þÈË: mpich-discuss at mcs.anl.gov
> Ö÷Ìâ: Re: [mpich-discuss] how to connect MPI_Send with CH3_isend
> 
> The best way to understand what happens is to step through the calls
> with a debugger.  The channel is selected in the configure step, and
> only that channel will be compiled, so there will be only one copy of
> ch3_isend in the binary.
> 
> -d
> 
> On 11/12/2009 05:54 AM, hu yaohui wrote:
>> hi guys!
>>     Could someone tell me the detail calling flow from MPI_Send() to
>> CH3_isend()?
>>     How to control which CH3_isend() is called between sock,sctp and
>> shm? thank you very much!
>>
> best
>> wishes!
>>
> 
>> loki!
>>  
>>
>>
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