| Re: [ptp-user] MPI Barrier Analysis |
|
For reference to this thread, the bug is https://bugs.eclipse.org/bugs/show_bug.cgi?id=356745
done On 09/04/2011 03:39 PM, Beth Tibbitts wrote: Yes I think you showed me this in July... sorry for not following up. I looked then, and I seem to remember that Barrier Analysis is supported only on C, not C++ programs. I can't find where we document that, though. I looked at all the test cases we originally ran it on - Tcgmsg, Skami, sBLAS, ParMetic, MPB, FFT,and Armci, and they are all C. The paper that describes the algorithm, "Barrier Matching for Programs with Textually Unaligned Barriers" by Zhang and Duesterwald, PPoPP 2007, does say (in Section 6), "We have implemented multi-valued _expression_ slicing and barrier matching for MPI/C programs as part of the Eclipse Parallel Tools Platform (PTP) project (www.eclipse.org/ptp)." But we should have stated it more clearly in the PTP documentation. So I think the answer is, it doesn't support C++, but I should document that and make it fail more gracefully on C++ programs. Can you please open a bugzilla bug on this, Steve? Thanks. ...Beth Beth Tibbitts Eclipse Parallel Tools Platform http://eclipse.org/ptp IBM STG - High Performance Computing Tools Mailing Address: IBM Corp., 745 West New Circle Road, Lexington, KY 40511
I have a relatively simple program, hello world + send messages + a barrier. When I run MPI Barrier Analysis I get this " java.util.EmptyStackException at java.util.Stack.peek(Stack.java:102) at org.eclipse.ptp.pldt.mpi.analysis.cdt.graphs.impl.CallGraph.RV_DFS(CallGraph.java:261) at org.eclipse.ptp.pldt.mpi.analysis.cdt.graphs.impl.CallGraph.checkRecursive(CallGraph.java:187) at org.eclipse.ptp.pldt.mpi.analysis.cdt.graphs.impl.CallGraph.buildCG(CallGraph.java:138) at org.eclipse.ptp.pldt.mpi.analysis.actions.MPIAnalysisManager.run(MPIAnalysisManager.java:49) at " This happens whether I select the project our source file in the project explorer. Any ideas? BTW, the source file is below. Cheers, Steve //============================================================================ // Name : hello.cpp // Author : // Version : // Copyright : Your copyright notice // Description : Hello World in C++, Ansi-style //============================================================================ #include <mpi.h> #include <stdio.h> #include <string.h> using namespace std; int main(int argc, char **argv) { MPI_Init(&argc, &argv); int rank,p; char message[100]; MPI_Comm_rank(MPI_COMM_WORLD, &rank); MPI_Comm_size(MPI_COMM_WORLD, &p); int source=0,dest; int tag = 123; MPI_Status status; if (rank == 0) { // the master task printf("Hello From process 0: Num processes: %d\n", p); for (source = 1; source < p; source++) { MPI_Recv(message, 100, MPI_CHAR, source, tag, MPI_COMM_WORLD, &status); printf("%s\n", message); } } else { // worker tasks /* create message */ sprintf(message, "Hello from process %d!", rank); dest = 0; /* use strlen+1 so that '\0' get transmitted */ MPI_Send(message, strlen(message) + 1, MPI_CHAR, dest, tag, MPI_COMM_WORLD); } MPI_Barrier(MPI_COMM_WORLD); MPI_Finalize(); return 0; } _______________________________________________ ptp-user mailing list ptp-user@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/ptp-user _______________________________________________ ptp-user mailing list ptp-user@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/ptp-user |
