Re: [hwloc-users] Machine nodes in hwloc topology

2018-02-05 Thread Brice Goglin 
Yes, one and only one, the top-level root object of the topology.

This is somehow implied by the doc of HWLOC_OBJ_MACHINE itself ("The
root object type"), I guess I should make it even more clear there? If
there's another place in the doc where this should be added/clarified,
please let me know.

Brice



Le 05/02/2018 à 23:19, Madhu, Kavitha Tiptur a écrit :
> Hi
>
> Thanks for the response. Could you also confirm if hwloc topology
> object would have only machine node?
>
> Thanks,
> Kavitha
>
>
>
>> On Feb 5, 2018, at 4:14 PM, Brice Goglin > > wrote:
>>
>> Hello,
>>
>> Oops, sorry, this sentence is obsolete, I am removing it from the doc
>> right now.
>>
>> We don't support the assembly of multiple machines in a single hwloc
>> topology anymore. For the record, this feature was a very small
>> corner case and it had important limitations (you couldn't bind
>> things or use cpusets unless you were very careful about which host
>> you were talking about), and it made the core hwloc code much more
>> complex.
>>
>> Thanks for the report
>> Brice
>>
>>
>> Le 05/02/2018 à 23:02, Madhu, Kavitha Tiptur a écrit :
>>> Hi
>>>
>>> I have a question on topology query. The hwloc 2.0.0 documentation
>>> states that "Additionally it may assemble the topologies of multiple
>>> machines into a single one so as to let applications consult the
>>> topology of an entire fabric or cluster at once.”. Since “system”
>>> object type has been removed from hwloc, does this statement mean
>>> that multiple “machine” nodes in the topology object would be
>>> combined to one? I can see in function“hwloc_topology_check” that
>>> machine node is at depth 0 and there are no machine nodes at depth
>>> other than 0. Can anyone confirm this?   
>>>
>>> Thanks 
>>> Kavitha
>>>
>>>
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>>> hwloc-users mailing list
>>> hwloc-users@lists.open-mpi.org
>>> https://lists.open-mpi.org/mailman/listinfo/hwloc-users
>>
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>
>
>
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Re: [hwloc-users] Machine nodes in hwloc topology

2018-02-05 Thread Madhu, Kavitha Tiptur 
Hi

Thanks for the response. Could you also confirm if hwloc topology object would 
have only machine node?

Thanks,
Kavitha



On Feb 5, 2018, at 4:14 PM, Brice Goglin 
> wrote:

Hello,

Oops, sorry, this sentence is obsolete, I am removing it from the doc right now.

We don't support the assembly of multiple machines in a single hwloc topology 
anymore. For the record, this feature was a very small corner case and it had 
important limitations (you couldn't bind things or use cpusets unless you were 
very careful about which host you were talking about), and it made the core 
hwloc code much more complex.

Thanks for the report
Brice


Le 05/02/2018 à 23:02, Madhu, Kavitha Tiptur a écrit :
Hi

I have a question on topology query. The hwloc 2.0.0 documentation states that 
"Additionally it may assemble the topologies of multiple machines into a single 
one so as to let applications consult the topology of an entire fabric or 
cluster at once.”. Since “system” object type has been removed from hwloc, does 
this statement mean that multiple “machine” nodes in the topology object would 
be combined to one? I can see in function“hwloc_topology_check” that machine 
node is at depth 0 and there are no machine nodes at depth other than 0. Can 
anyone confirm this?

Thanks
Kavitha



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Re: [hwloc-users] Machine nodes in hwloc topology

2018-02-05 Thread Brice Goglin 
Hello,

Oops, sorry, this sentence is obsolete, I am removing it from the doc
right now.

We don't support the assembly of multiple machines in a single hwloc
topology anymore. For the record, this feature was a very small corner
case and it had important limitations (you couldn't bind things or use
cpusets unless you were very careful about which host you were talking
about), and it made the core hwloc code much more complex.

Thanks for the report
Brice


Le 05/02/2018 à 23:02, Madhu, Kavitha Tiptur a écrit :
> Hi
>
> I have a question on topology query. The hwloc 2.0.0 documentation
> states that "Additionally it may assemble the topologies of multiple
> machines into a single one so as to let applications consult the
> topology of an entire fabric or cluster at once.”. Since “system”
> object type has been removed from hwloc, does this statement mean that
> multiple “machine” nodes in the topology object would be combined to
> one? I can see in function“hwloc_topology_check” that machine node is
> at depth 0 and there are no machine nodes at depth other than 0. Can
> anyone confirm this?   
>
> Thanks 
> Kavitha
>
>
> ___
> hwloc-users mailing list
> hwloc-users@lists.open-mpi.org
> https://lists.open-mpi.org/mailman/listinfo/hwloc-users

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[hwloc-users] Machine nodes in hwloc topology

2018-02-05 Thread Madhu, Kavitha Tiptur 
Hi

I have a question on topology query. The hwloc 2.0.0 documentation states that 
"Additionally it may assemble the topologies of multiple machines into a single 
one so as to let applications consult the topology of an entire fabric or 
cluster at once.”. Since “system” object type has been removed from hwloc, does 
this statement mean that multiple “machine” nodes in the topology object would 
be combined to one? I can see in function“hwloc_topology_check” that machine 
node is at depth 0 and there are no machine nodes at depth other than 0. Can 
anyone confirm this?

Thanks
Kavitha
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