Superb, thanks for the clarification!
I will look into it!
2014-09-15 16:33 GMT+02:00 Ralph Castain <r...@open-mpi.org>:
> Not really "removed" - say rather "renamed". The PLPA system was replaced
> by HWLOC starting with the 1.7 series. The binding directives were replaced
> with --bind-to <x> options as they became much more fine-grained than
> before - you can bind all the way do the hardware thread level.
>
> If you don't want to bind at all, you now use --bind-to none
>
> Memory affinity options are likewise now implemented as part of hwloc. You
> can see all these new params using ompi_info:
>
> ompi_info --param hwloc all --level 9
>
> MCA hwloc: parameter "hwloc" (current value: "", data
> source:
> default, level: 2 user/detail, type: string)
> Default selection set of components for the hwloc
> framework (<none> means use all components that
> can
> be found)
> MCA hwloc: parameter "hwloc_base_verbose" (current value:
> "0",
> data source: default, level: 8 dev/detail, type:
> int)
> Verbosity level for the hwloc framework (0 = no
> verbosity)
> MCA hwloc: parameter "hwloc_base_mem_alloc_policy" (current
> value: "none", data source: default, level: 9
> dev/all, type: int)
> General memory allocations placement policy (this
> is not memory binding). "none" means that no
> memory
> policy is applied. "local_only" means that a
> process' memory allocations will be restricted to
> its local NUMA node. If using direct launch, this
> policy will not be in effect until after
> MPI_INIT.
> Note that operating system paging policies are
> unaffected by this setting. For example, if
> "local_only" is used and local NUMA node memory
> is
> exhausted, a new memory allocation may cause
> paging.
> Valid values: 0:"none", 1:"local_only"
> MCA hwloc: parameter "hwloc_base_mem_bind_failure_action"
> (current value: "warn", data source: default,
> level: 9 dev/all, type: int)
> What Open MPI will do if it explicitly tries to
> bind memory to a specific NUMA location, and
> fails.
> Note that this is a different case than the
> general allocation policy described by
> hwloc_base_alloc_policy. A value of "silent"
> means
> that Open MPI will proceed without comment. A
> value
> of "warn" means that Open MPI will warn the first
> time this happens, but allow the job to continue
> (possibly with degraded performance). A value of
> "error" means that Open MPI will abort the job if
> this happens.
> Valid values: 0:"silent", 1:"warn", 2:"error"
> MCA hwloc: parameter "hwloc_base_binding_policy" (current
> value: "", data source: default, level: 9
> dev/all,
> type: string)
> Policy for binding processes. Allowed values:
> none,
> hwthread, core, l1cache, l2cache, l3cache,
> socket,
> numa, board ("none" is the default when
> oversubscribed, "core" is the default when np<=2,
> and "socket" is the default when np>2). Allowed
> qualifiers: overload-allowed, if-supported
> MCA hwloc: parameter "hwloc_base_bind_to_core" (current
> value:
> "false", data source: default, level: 9 dev/all,
> type: bool)
> Bind processes to cores
> Valid values: 0: f|false|disabled, 1:
> t|true|enabled
> MCA hwloc: parameter "hwloc_base_bind_to_socket" (current
> value: "false", data source: default, level: 9
> dev/all, type: bool)
> Bind processes to sockets
> Valid values: 0: f|false|disabled, 1:
> t|true|enabled
> MCA hwloc: parameter "hwloc_base_report_bindings" (current
> value: "false", data source: default, level: 9
> dev/all, type: bool)
> Report bindings to stderr
> Valid values: 0: f|false|disabled, 1:
> t|true|enabled
> MCA hwloc: parameter "hwloc_base_slot_list" (current value:
> "", data source: default, level: 9 dev/all, type:
> string)
> List of processor IDs to bind processes to
> [default=NULL]
> MCA hwloc: parameter "hwloc_base_cpu_set" (current value:
> "",
> data source: default, level: 9 dev/all, type:
> string)
> Comma-separated list of ranges specifying logical
> cpus allocated to this job [default: none]
> MCA hwloc: parameter "hwloc_base_use_hwthreads_as_cpus"
> (current value: "false", data source: default,
> level: 9 dev/all, type: bool)
> Use hardware threads as independent cpus
> Valid values: 0: f|false|disabled, 1:
> t|true|enabled
> MCA hwloc: parameter "hwloc_base_topo_file" (current value:
> "", data source: default, level: 9 dev/all, type:
> string)
> Read local topology from file instead of directly
> sensing it
>
>
> On Sep 15, 2014, at 7:13 AM, Nick Papior Andersen <nickpap...@gmail.com>
> wrote:
>
> Dear all
>
> maffinity, paffinity parameters have been removed since 1.7.
>
> For the uninitiated is this because it has been digested by the code so as
> the code would automatically decide on these values?
>
> For instance I have always been using paffinity_alone=1 for single node
> jobs with entire occupation.
> From what it seems, this is not necessary any more?
>
> Hence what does "removed" cover and are there anything that we as users
> should take care of when having previously dealt with these parameters?
>
> I have tried searching the users-list, to no avail, and the NEWS file does
> not cover it (simply says "removed").
>
> --
> Kind regards Nick
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>
>
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>
--
Kind regards Nick
