Parallel Programming: for Multicore and Cluster Systems- P28 pptx

Ngày tải lên: 03/07/2014, 22:20

... use a different order for locking the mutex variables. This can be seen for two threads T 1 and T 2 and two mutex variables ma and mb as follows: • thread T 1 first locks ma and then mb; • thread ... priorities and the scheduling strategies used, see Sect. 6.1.9 for more information. The order in which waiting threads become owner of a mutex variable is not defined in the Pthrea...

Ngày tải lên: 03/07/2014, 16:21

... separate thread available for execution. Therefore, the application program must apply parallel pro- gramming techniques to get performance improvements for SMT processors. 2.4.2 MulticoreProcessors According ... be used for the transmission and the switching strategy which determines whether and how mes- sages are cut into pieces, how a routing path is assigned to a message, and...

Ngày tải lên: 03/07/2014, 16:20

... Language bindings for C, C++, Fortran-77, and Fortran-95 are sup- ported. In the following, we concentrate on the interface for C and describe the most important features. For a detailed description, ... product and a matrix–vector multiplication and derive the formula for the running time on a mesh topology. Exercise 4.14 Develop a runtime function to capture the execution ti...

Ngày tải lên: 03/07/2014, 16:21

... communication partners in the form source/dest are given in this order. For example, for the process with rank=5,itiscoords[1]=1, and there- fore source=9 (lower neighbor in dimension 0) and dest=1 (upper ... and source for each pro- cess. These are then used as parameters for MPI Sendrecv(). The following diagram illustrates the exchange. For each process, its rank, its Carte...

Ngày tải lên: 03/07/2014, 16:21

Ngày tải lên: 03/07/2014, 22:20

Ngày tải lên: 03/07/2014, 22:20

Ngày tải lên: 03/07/2014, 22:20

Ngày tải lên: 03/07/2014, 22:20

Ngày tải lên: 03/07/2014, 22:20