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Subject: Re: [OMPI users] OpenMPI with bounds checking
From: Gabriele Fatigati (g.fatigati_at_[hidden])
Date: 2008-06-24 04:44:02


Hi Jeff,
sorry for the delay. When i have little time, i'll check OMPI trunck with
bound checking.
When is the deliver date of 1.3 version?

2008/6/20 Jeff Squyres <jsquyres_at_[hidden]>:

> On Jun 19, 2008, at 11:47 AM, Gabriele Fatigati wrote:
>
> i didn't compile OpenMPI with bounds checking, but only my application.
>> Problems with OMPI compiled with bound checking remains.
>>
>
> Were you checking only with the OMPI 1.2 series? If so, is there a chance
> you could test with the OMPI trunk? If we do have real bounds issues, it
> would be good to get them cleared up.
>
>
>>
>> 2008/6/19 Jeff Squyres <jsquyres_at_[hidden]>:
>> On Jun 19, 2008, at 11:25 AM, Gabriele Fatigati wrote:
>>
>> Hi Jeff,
>> i solved using Gigabit net and eth1 interface!
>>
>> So, there are problems beetween Infiniband and gcc with bound checking.
>>
>> This is probably not too surprising -- the IB driver gives back memory to
>> the process that didn't come from malloc or other traditional memory
>> allocators, and this can confuse bounds checkers, leading to false
>> positives.
>>
>> In the upcoming v1.3 series, we added a whole pile of stuff to handle
>> these kinds of false positives when running under valgrind. Just curious --
>> does the gcc bounds checking stuff give you the possibility of saying "this
>> memory is ok"? (valgrind does; we use it for IB-driver allocated or
>> initialized memory)
>>
>>
>> --
>> Jeff Squyres
>> Cisco Systems
>>
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>>
>>
>>
>> --
>> Gabriele Fatigati
>>
>> CINECA Systems & Tecnologies Department
>>
>> Supercomputing Group
>>
>> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
>>
>> www.cineca.it Tel: +39 051 6171722
>>
>> g.fatigati_at_[hidden] _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>
>
> --
> Jeff Squyres
> Cisco Systems
>
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
>

-- 
Gabriele Fatigati
CINECA Systems & Tecnologies Department
Supercomputing Group
Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
www.cineca.it Tel: +39 051 6171722
g.fatigati_at_[hidden]