Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-17 Thread Jeff Squyres (jsquyres)
On Mar 17, 2014, at 12:37 PM, Gus Correa wrote: > In other words, does OOB pick the interface associated to the IP address > that resolves the specific node name, or does OOB have its own will and > picks whatever interface it wants? I'll let Ralph contribute the detail here, but it's basically

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-17 Thread Ralph Castain
On Mar 17, 2014, at 9:37 AM, Gus Correa wrote: > On 03/17/2014 10:52 AM, Jeff Squyres (jsquyres) wrote: >> To add on to what Ralph said: >> >> 1. There are two different message passing paths in OMPI: >>- "OOB" (out of band): used for control messages >>- "BTL" (byte transfer layer): us

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-17 Thread Gus Correa
On 03/17/2014 10:52 AM, Jeff Squyres (jsquyres) wrote: To add on to what Ralph said: 1. There are two different message passing paths in OMPI: - "OOB" (out of band): used for control messages - "BTL" (byte transfer layer): used for MPI traffic (there are actually others, but these se

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-17 Thread Jeff Squyres (jsquyres)
To add on to what Ralph said: 1. There are two different message passing paths in OMPI: - "OOB" (out of band): used for control messages - "BTL" (byte transfer layer): used for MPI traffic (there are actually others, but these seem to be the relevant 2 for your setup) 2. If you don't sp

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-16 Thread Ralph Castain
l_base_verbose 100" should tell you something about what is going on in the btl layer. Etc. > > Appreciating your kindly input > > Jianyu > > > > From: r...@open-mpi.org > > Date: Sat, 15 Mar 2014 07:21:31 -0700 > > To: us...@open-mpi.org > > S

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-16 Thread Jianyu Liu
if run on single node.How to figure out the possible reasons? Appreciating your kindly input Jianyu > From: r...@open-mpi.org > Date: Sat, 15 Mar 2014 07:21:31 -0700 > To: us...@open-mpi.org > Subject: Re: [OMPI users] Question about '--mca btl tcp,self' > >

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-15 Thread Ralph Castain
On Mar 14, 2014, at 10:18 PM, Jianyu Liu wrote: >> On Mar 14, 2014, at 10:16:34 AM,Jeff Squyres wrote: >> >>> On Mar 14, 2014, at 10:11 AM, Ralph Castain wrote: >>> 1. If specified '--mca btl tcp,self', which interface application will run on, use GigE adaper OR use the OpenFabr

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-15 Thread Jianyu Liu
>On Mar 14, 2014, at 10:16:34 AM,Jeff Squyres wrote: > >>On Mar 14, 2014, at 10:11 AM, Ralph Castain wrote: >> >>> 1. If specified '--mca btl tcp,self', which interface application will run >>> on, use GigE adaper OR use the OpenFabrics interface in IP over IB mode >>> (just like a high perfo

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-14 Thread Jeff Squyres (jsquyres)
On Mar 14, 2014, at 10:11 AM, Ralph Castain wrote: >> 1. If specified '--mca btl tcp,self', which interface application will run >> on, use GigE adaper OR use the OpenFabrics interface in IP over IB mode >> (just like a high performance GigE adapter) ? > > Both - ip over ib looks just like

Re: [OMPI users] Question about '--mca btl tcp,self'

2014-03-14 Thread Ralph Castain
On Mar 14, 2014, at 6:50 AM, Jianyu Liu wrote: > Dear Sir/Madam, > > 1. If specified '--mca btl tcp,self', which interface application will run > on, use GigE adaper OR use the OpenFabrics interface in IP over IB mode > (just like a high performance GigE adapter) ? Both - ip over ib look

[OMPI users] Question about '--mca btl tcp,self'

2014-03-14 Thread Jianyu Liu
Dear Sir/Madam, 1. If specified '--mca btl tcp,self', which interface application will run on, use GigE adaper OR use the OpenFabrics interface in IP over IB mode (just like a high performance GigE adapter) ? 2. If '--mca btl tcp,self' forced application to use GigE adapter, how to forc