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From: Sharon Melamed (sharonm_at_[hidden])
Date: 2007-07-10 11:18:34


Hi Ralph,

The responsibility for mapping rank to processor is in the ODLS
component.
I didn't touch the orted code.

If you doesn't use orted - you steel use the ODLS component (like ODLS
bproc). Any way you mast have a component in the end machine that builds
the orte_odls_child_t structure from the RMAPS information and launch
the local processes. Currently this component is the ODLS. Most of my
work is in the ODLS component so if you decide to eliminate the orteds
you mast, somehow, preserve the ODLS functionality.

Sharon.

  

-----Original Message-----
From: devel-bounces_at_[hidden] [mailto:devel-bounces_at_[hidden]] On
Behalf Of Ralph H Castain
Sent: Tuesday, July 10, 2007 4:43 PM
To: Open MPI Developers
Subject: Re: [OMPI devel] ticket 1023

As I understood our original discussions, this would move responsibility
for
mapping rank to processor back into the orted - is that still true?

Reason I ask is to again clarify for people if we are doing so as it (a)
impacts those systems that don't use our orteds (e.g., will affinity
still
work in those environments?); and (b) it will make elimination of the
orteds
just a little more difficult.

So could you please clarify for everyone what this code functionally
does?
All 1023 does is layout syntax - it doesn't clearly state what happens
where.

Thanks
Ralph

On 7/10/07 7:32 AM, "Sharon Melamed" <sharonm_at_[hidden]> wrote:

> Hello All,
>
>
> In the recent few weeks I implemented ticket 1023
> (https://svn.open-mpi.org/trac/ompi/ticket/1023
> <https://svn.open-mpi.org/trac/ompi/ticket/1023> ).
>
> In a few words, the purpose of ticket 1023 is to expand the hostfile
syntax to
> precisely specify slot
> location (in terms of virtual CPU ID or socket core notation) in the
node
> and/or rank in a MCW.
>
>
>
> The code is in a temporary branch
> https://svn.open-mpi.org/svn/ompi/tmp/sharon/
>
> The changes are:
>
> 1. In the RAS base component:
> a. Added new list of orte_ras_proc_t structures
> b. Each orte_ras_proc_t structure contains 3 members: node_name,
rank and
> cpu_list.
> c. the cpu_list is a string representing the slot list from the
hostfile
> i.e.: if the
> SLOT token in the hostfile is - SLOT=1_at_2:1,3:1-4, the slot_list
string
> is: 2:1,3:7-9.
>
> 2. In the RDS hostfile component:
> a. Added new token SLOT to the lex parser.
> b. filling the orte_ras_proc_t structure list according the SLOT
token in
> the hostfile.
>
> 3. In the RMAPS round robin component:
> a. Added new member to orte_mapped_node_t structure - slot_list
(similar to
> the slot_list
> in the orte_ras_proc_t structure)
> b. in the orte_rmaps_rr_map, mapping job according to hostfile
ranks before
> mapping the job
> by slot or by node.
> c. in the orte_rmaps_rr_map, arranging the MCW ranks according to
the
> hostfile.
>
> 4. in the ODLS default module:
> a. Added slot_list to orte_odls_default_get_add_procs_data.
> b. Added slot_list to orte_odls_default_launch_local_procs.
> c. Added new member to the child structure a cpu_set bitmap (for
PLPA)
> d. Added mapping of the slot_list string to a cpu_set bitmap in the
child
> structure.
>
> For more details you can browse the code.
>
> I would like to merge these changes to the trunk as soon as possible
since, as
> I understood from Ralph Castain emails,
> The Open RTE will go through a lot of changes in the near future and
since
> this is a relatively small change I want to merge
> it before the big change.
>
> Any comments?
>
> Sharon.
>
>
>
>
> _______________________________________________
> devel mailing list
> devel_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/devel

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