Attempt to fix inter-volume trace pair functions #243
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inducer
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Mar 28, 2022
grudge/trace_pair.py
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| return 0 | ||
| else: | ||
| ary_tag = (comm_tag, key) | ||
| return staple_distributed_send( |
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Make the send separately from stapling it.
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test failure was caused by bug in test (that has since been fixed)
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I abandoned the previous one-way communication idea (I didn't know how to make this work in lazy, since there wouldn't be anything to staple the sends to). This PR is an attempt to implement a two-way version. Still untested.
Since the trace data is possibly heterogeneous in the multi-volume case, the sends in
_RankBoundaryCommunicationLazycan't be stapled to the receives anymore (since the sent and received data on a given rank will in general have different numbers of subarrays). As a workaround, I staple the sends to arrays of zeros with the same shape as the data being sent. Then I reduce the resulting array container of zeros to a scalar zero value, and add it to the trace pair data being returned so that something (hopefully) will depend on it.Depends on #239 (and inducer/meshmode#308).