[MPICH2-dev] MPICH2 1.0.6rc1 thread support

[James S Perrin]

Dear Rajeev,
	That's great! Thanks very much for your help.

Regards
James

Rajeev Thakur wrote:
> James,
>       OK, we will allow thread serialized for ssm and shm channels as well
> (in 1.0.6). We will also provide a feature matrix. See the example in
> http://www-unix.mcs.anl.gov/~balaji/support.html .
> 
> Regards,
> Rajeev
> 
>> -----Original Message-----
>> From: James S Perrin [mailto:james.s.perrin at manchester.ac.uk] 
>> Sent: Friday, August 17, 2007 12:03 PM
>> To: Rajeev Thakur
>> Cc: mpich2-dev at mcs.anl.gov
>> Subject: Re: [MPICH2-dev] MPICH2 1.0.6rc1 thread support
>>
>> Hi,
>>
>> 	We want to use ssm as we sometimes have two specific 
>> processes per 
>> machine that working as a team.
>>
>>
>> 	Actaully I think we have been using assuming serialized 
>> support at 
>> compile time (we're not doing runtime checking of 
>> threads_provided, long 
>> story don't ask) and it seems to have been working, we hadn't 
>> explicitly 
>> enabled threading in mpich2 so I gues we've been "lucky" :) Our 
>> Master/Slaves app has a threaded Master process that performs 
>> serialized 
>> MPI calls in two threads.
>>
>>
>>
>> Regards
>> James
>>
>> Rajeev Thakur wrote:
>>> Actually serialized and multiple thread levels are 
>> supported for sock and
>>> nemesis. I have updated the README. For other channels such 
>> as ssm, which
>>> have no thread support, we currently allow single and 
>> funneled. Do you need
>>> to use serialized with ssm?
>>>
>>> Rajeev
>>>  
>>>
>>>> -----Original Message-----
>>>> From: owner-mpich2-dev at mcs.anl.gov 
>>>> [mailto:owner-mpich2-dev at mcs.anl.gov] On Behalf Of James S Perrin
>>>> Sent: Friday, August 17, 2007 9:55 AM
>>>> To: mpich2-dev at mcs.anl.gov
>>>> Subject: [MPICH2-dev] MPICH2 1.0.6rc1 thread support
>>>>
>>>> Hi,
>>>> 	The README states that and serialized and multiple 
>>>> thread levels are 
>>>> only support by the sock channel, but I can configure the ssm 
>>>> channel to 
>>>> use serialized i.e.:
>>>>
>>>> --with-device=ch3:ssm --enable-threads=serialized
>>>>
>>>> where
>>>>
>>>> --with-device=ch3:ssm --enable-threads=multiple
>>>>
>>>> reports a configure error as expected. Is configure correct 
>>>> or the README?
>>>>
>>>> BTW some sort of feature matrix for the various devices 
>> and channels 
>>>> would be very helpful.
>>>>
>>>> Regards
>>>> James
>>>> -- 
>>>> --------------------------------------------------------------
>>>> ----------
>>>> James S. Perrin,                  | email: 
>>>> james.perrin at manchester.ac.uk
>>>> Research Computing Services,      | web:   www.mc.manchester.ac.uk
>>>> Kilburn Building, The University, | tel:   +44 161 275 6945
>>>> Manchester, England. M13 9PL.     | fax:   +44 161 275 0637
>>>> --------------------------------------------------------------
>>>> ----------
>>>> "The test of intellect is the refusal to belabour the obvious"
>>>> - Alfred Bester
>>>> --------------------------------------------------------------
>>>> ----------
>>>>
>>>>
>>
>> -- 
>> --------------------------------------------------------------
>> ----------
>> James S. Perrin,                  | email: 
>> james.perrin at manchester.ac.uk
>> Research Computing Services,      | web:   www.mc.manchester.ac.uk
>> Kilburn Building, The University, | tel:   +44 161 275 6945
>> Manchester, England. M13 9PL.     | fax:   +44 161 275 0637
>> --------------------------------------------------------------
>> ----------
>> "The test of intellect is the refusal to belabour the obvious"
>> - Alfred Bester
>> --------------------------------------------------------------
>> ----------
>>
>>
> 


-- 
------------------------------------------------------------------------
James S. Perrin,                  | email: james.perrin at manchester.ac.uk
Research Computing Services,      | web:   www.mc.manchester.ac.uk
Kilburn Building, The University, | tel:   +44 161 275 6945
Manchester, England. M13 9PL.     | fax:   +44 161 275 0637
------------------------------------------------------------------------
"The test of intellect is the refusal to belabour the obvious"
- Alfred Bester
------------------------------------------------------------------------