Hello,
We're getting the topology info using the opal_hwloc_topology object, we won't
be doing our own discovery.
William
On 3/17/20, 11:54 PM, "devel on behalf of Ralph Castain via devel"
<devel-boun...@lists.open-mpi.org on behalf of devel@lists.open-mpi.org> wrote:
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Hey folks
I saw the referenced "new feature" on the v5 feature spreadsheet and wanted
to ask a quick question. Is the OFI MTL going to be doing its own hwloc
topology discovery for this feature? Or is it going to access the topology info
via PMIx and the OPAL hwloc abstraction?
I ask because we know that having every proc do its own topology discovery
is a major problem on large-core systems (e.g., KNL or Power9). If OFI is going
to do an hwloc discovery operation, then we need to ensure this doesn't happen
unless specifically requested by a user willing to pay that price (and it was
significant).
Can someone from Amazon (as the item is assigned to them) please clarify?
Ralph
