By Mark Frauenfelder
For those who wish to tweak, disassemble, recreate, and invent cool new makes use of for know-how, you will love MAKE, our quarterly booklet for the inquisitive do-it-yourselfer. each factor is filled with initiatives that can assist you utilize the entire know-how on your existence. every little thing from domestic leisure platforms, to laptops, to a bunch of PDAs is reasonable online game. If there is a technique to hack it, tweak it, bend it, or remix it, you will discover out approximately it in MAKE. The might 2006 quantity 06 factor specializes in Robots! construct a couple of digital bugs, LED throwies, a rodent-powered nightlight, a floating tower constitution, a computer virus sucker, and that's simply the start.
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Additional resources for Make, Volume 6: Technology on Your Time (Make: Technology on Your Time)
Breadth ﬁrst search), sparse matrix computations with sparsity mutations, and particle codes. We will ﬁrst describe possible solutions to this problem and then present a solution that illustrates the semantic power of nonblocking collectives and presents a use case for MPI_Ibarrier. A trivial solution to this problem is to exchange the data sizes with an MPI_Alltoall that sets up an MPI_Alltoallv for the communication of the actual data. This simple solution sends p2 data items for a communicator of size p.
The same topology can be speciﬁed through the general distributed graph topology interface. 18. 2 Edge Weights The distributed graph topology interface accepts edge weights for each communication edge. If the graph is unweighted, the user can specify MPI_UNWEIGHTED instead of the array argument. 18: An example general distributed graph speciﬁcation for the Peterson Graph Working with Large-Scale Systems 39 the MPI standard and one can easily envision diﬀerent semantics such as message counts, data volume, maximum message size, or even message latency hints.
MPI-3 deﬁnes a simple interface for nonblocking collectives: It allows programmers to call nonblocking collectives by adding an “I” (for immediate) to the name and a request output parameter to the blocking version. For example, the nonblocking version of MPI_Bcast(buffer, count, datatype, root, comm) is MPI_Ibcast(buffer, count, datatype, root, comm, request). 2, respectively. The output request is the same as the request object from point-to-point communication and can be used in the usual test and wait functions to check for completion of the operation.
Make, Volume 6: Technology on Your Time (Make: Technology on Your Time) by Mark Frauenfelder