On Mon, Apr 28, 2014 at 01:44:28PM -0400, George Bosilca wrote: > > On Apr 28, 2014, at 13:39 , Nathan Hjelm <hje...@lanl.gov> wrote: > > > This part of the heterogeneous support being broken was my fault. I > > fixed it in r31535. I will try to spend some time over the next month or > > so fixing heterogeneous support in the one-sided code. Right now the > > packed datatype representation will not work if sizeof (int) is not > > consistent. > > We are consistently using length-aware types (uint32_t) which have the same > length. However, I would guess that RMA has the same issue as the datatype H > functions (where the remote displacement cannot be correctly computed because > we only know the local byte-level displacement).
Currently, the displacement is computed on the remote side so as long as the datatype functions in osc/base support heterogenous we should be good there. Once I finish the optimizations for RDMA networks that may no longer be the case. I will try to keep the heterogeneous case in mind as I write this code. > > Not sure if we ever claimed to support this case though. > > If there is need for conversion, I guess one will have to switch back to the > pt2pt mode … mode we don’t have anymore. The rdma component is more or less the pt2pt component right now. I am working on re-adding direct RDMA (and atomic) support for a EuroMPI poster. I don't do any of the header conversion at the moment but it won't be hard to add. -Nathan
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