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other request-using frameworks. - Rather than having mpi/c/* functions allocate requests explicitly, pass the MPI_Request* down to the I/O component and have it perform the allocation. - While the I/O base provides a base request which can be used, it is not required and all request management occurs within the component. - Push progress management into the component, rather than having it happen in the base. Progress functions are now easily registered, and not all (ie, the one existing) components use progress functions in any rational way. ROMIO switched to generalized requests instead of MPIO_Requests many moons ago, and Open MPI now uses ROMIO's generalized requests, so there is no reason to wrap those requests (which are OMPI requests) in another level of request. Now the file function passes the MPI_Request* to the ROMIO component, which passes it to the underlying ROMIO function, which calls MPI_Grequest_start to create an OMPI request, which is what gets set as the request to the user. Much cleaner. This patch has two motivations. One, a whole heck of a lot of code just got removed, and request handling is now much cleaner for I/O components. Two, by adding support for Argonne's proposed generalized request extensions, we can allow ROMIO to provide async I/O through generalized requests, which we couldn't rationally do in the old setup due to the crazy request completion rules. This commit was SVN r22235. |
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configure.m4 | ||
configure.params | ||
Makefile.am |