трасировка Mpi приложений

Отладка, трассировка и оптимизация приложений

Зачем? ,[object Object],[object Object],[object Object]

Как будем делать? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Упражнение ,[object Object],[object Object],[object Object],[object Object],[object Object]

Упражнение ,[object Object],[object Object],[object Object],[object Object]

Упражнение ,[object Object],[object Object]

[object Object],Rank = 3 Rank = 1 Rank = 2 Process 1 Process 2 Process 3 Process 4 CN1 CN2 main main main main Mpi_send Mpi_send Mpi_send Mpi_receive Mpi_receive Mpi_receive

Коллективные операции

Упражнение ,[object Object],[object Object],int params[2] = {0, 0}; if (myRank == 0) // Master preps data for bcast: { params[0] = rows; params[1] = cols; } // EVERYONE participates in broadcast (one sends, rest receive): MPI_Bcast(params, 2, MPI_INT, 0 /*master broadcasts*/, MPI_COMM_WORLD); // EVERYONE now knows the size of the image: rows = params[0]; cols = params[1];

Упражнение ,[object Object],[object Object],int rowsPerProc = rows / numProcs; int leftOverRows = rows % numProcs; void *sendbuf = (myRank == 0) ? image[leftOverRows] : NULL; void *recvbuf = (myRank == 0) ? chunk[1+leftOverRows] : chunk[1]; int count = rowsPerProc * cols; MPI_Scatter(sendbuf, count, MPI_PIXEL_T, recvbuf, count, MPI_PIXEL_T, 0 /*master scatters*/ , MPI_COMM_WORLD); if (myRank == 0 && leftOverRows > 0) memcpy_s(chunk[1], leftOverRows*cols*sizeof(PIXEL_T), image[0], leftOverRows*cols*sizeof(PIXEL_T));

Упражнение ,[object Object],[object Object],[object Object]

© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

трасировка Mpi приложений

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to трасировка Mpi приложений

Similar to трасировка Mpi приложений (20)

More from Michael Karpov

More from Michael Karpov (20)

трасировка Mpi приложений