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Subject: Re: [OMPI users] mca btl_openib_flags default value
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-11-04 18:55:44


FWIW, we fixed this help message in the upcoming v1.3. The new help
message is:

mca:btl:openib:param:btl_openib_flags:help:BTL bit flags (general
flags: SEND=1, PUT=2, GET=4, SEND_INPLACE=8; flags only used by the
"dr" PML (ignored by others): ACK=16, CHECKSUM=32, RDMA_COMPLETION=128)

So 54 corresponds to PUT, GET, ACK, CHECKSUM (SEND is implied; IIRC
it's somewhat silly that we have SEND as a flag because we assume that
all BTL's can do it).

...although I see that the v1.3 message doesn't show the HETEROGENEOUS
flag, which is 256. /me goes to fix that...

On Nov 4, 2008, at 8:57 AM, Gilbert Grosdidier wrote:

> Bonjour,
>
> Working with OpenMPI 1.2.5 on RHEL5.2, I noticed a weird default
> value for
> this mca parameter, as printed by ompi_info:
>
> MCA btl: parameter "btl_openib_flags" (current value: "54")
> BTL flags, added together: SEND=1, PUT=2, GET=4 (cannot be 0)
>
> Is this expected or not ?
> I could understand any value between 1 & 7, but what does mean 54,
> please ?
> Does it behave like 6, if removal of the unexpected bits ?
>
> Thanks, Gilbert
>
> --
> *---------------------------------------------------------------------*
> Gilbert Grosdidier Gilbert.Grosdidier_at_[hidden]
> LAL / IN2P3 / CNRS Phone : +33 1 6446 8909
> Faculté des Sciences, Bat. 200 Fax : +33 1 6446 8546
> B.P. 34, F-91898 Orsay Cedex (FRANCE)
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-- 
Jeff Squyres
Cisco Systems