This question was addressed offline while the mailing lists were offline. We had things like hwloc_bitmap_set_ith_ulong() and hwloc_bitmap_from_ith_ulong() for packing/unpacking but they weren't very convenient unless you know multiple ulongs are actually needed to store the bitmap.
We added new functions to ease things (hwloc_bitmap_nr/from/to_ulongs()). They will be in the upcoming hwloc 2.1. Brice Le 23/08/2018 à 04:57, Junchao Zhang a écrit : > Hello, > Suppose I call hwloc on two MPI ranks and get a bitmap on each. On > rank 0, I want to bitwise OR the two. How to do that? I did not find > bitmap APIs to pack/unpack bitmaps to/from ulongs for MPI send/recv > purpose. > Thank you. > --Junchao Zhang > > > _______________________________________________ > hwloc-users mailing list > email@example.com > https://lists.open-mpi.org/mailman/listinfo/hwloc-users
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