diff --git a/hermit/usr/tests/Makefile b/hermit/usr/tests/Makefile index 5dc839095..5aa452458 100644 --- a/hermit/usr/tests/Makefile +++ b/hermit/usr/tests/Makefile @@ -48,7 +48,7 @@ endif default: all -all: hello.bin hello++.bin thr_hello.bin jacobi.bin hellof.bin #RCCE_minimum +all: hello.bin hello++.bin thr_hello.bin jacobi.bin hellof.bin cpi.bin #RCCE_minimum hello++: hello++.o @echo [LD] $@ @@ -79,7 +79,7 @@ jacobi: jacobi.o $Qchmod a-x $@.sym thr_hello.o: thr_hello.c - @echo [CC] $@ + @echo [CC] $@ $Q$(CC_FOR_TARGET) -c $(CFLAGS_FOR_TARGET) -pthread -o $@ $< thr_hello: thr_hello.o @@ -89,6 +89,17 @@ thr_hello: thr_hello.o $Q$(OBJCOPY_FOR_TARGET) $(STRIP_DEBUG) $@ $Qchmod a-x $@.sym +cpi.o: cpi.c + @echo [CC] $@ + $Q$(CC_FOR_TARGET) -c $(CFLAGS_FOR_TARGET) -pthread -o $@ $< + +cpi: cpi.o + @echo [LD] $@ + $Q$(CC_FOR_TARGET) $(LDFLAGS_FOR_TARGET) $(CFLAGS_FOR_TARGET) -o $@ $< -pthread -lmpi + $Q$(OBJCOPY_FOR_TARGET) $(KEEP_DEBUG) $@ $@.sym + $Q$(OBJCOPY_FOR_TARGET) $(STRIP_DEBUG) $@ + $Qchmod a-x $@.sym + RCCE_minimum: RCCE_minimum.o @echo [LD] $@ $Q$(CC_FOR_TARGET) $(LDFLAGS_FOR_TARGET) $(CFLAGS_FOR_TARGET) -o $@ $< -lircce diff --git a/hermit/usr/tests/cpi.c b/hermit/usr/tests/cpi.c new file mode 100644 index 000000000..3c758067a --- /dev/null +++ b/hermit/usr/tests/cpi.c @@ -0,0 +1,69 @@ +/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */ +/* + * (C) 2001 by Argonne National Laboratory. + * See COPYRIGHT in top-level directory. + */ + +/* + * We take this example form the orginoal MPICH distributions + * => see COPYRIGHT statement in hermit/usr/mpich-3.2 + */ + +#include "mpi.h" +#include +#include + +double f(double); + +double f(double a) +{ + return (4.0 / (1.0 + a*a)); +} + +int main(int argc,char *argv[]) +{ + int n, myid, numprocs, i; + double PI25DT = 3.141592653589793238462643; + double mypi, pi, h, sum, x; + double startwtime = 0.0, endwtime; + int namelen; + char processor_name[MPI_MAX_PROCESSOR_NAME]; + + MPI_Init(&argc,&argv); + MPI_Comm_size(MPI_COMM_WORLD,&numprocs); + MPI_Comm_rank(MPI_COMM_WORLD,&myid); + MPI_Get_processor_name(processor_name,&namelen); + + fprintf(stdout,"Process %d of %d is on %s\n", + myid, numprocs, processor_name); + fflush(stdout); + + n = 10000; /* default # of rectangles */ + if (myid == 0) + startwtime = MPI_Wtime(); + + MPI_Bcast(&n, 1, MPI_INT, 0, MPI_COMM_WORLD); + + h = 1.0 / (double) n; + sum = 0.0; + /* A slightly better approach starts from large i and works back */ + for (i = myid + 1; i <= n; i += numprocs) + { + x = h * ((double)i - 0.5); + sum += f(x); + } + mypi = h * sum; + + MPI_Reduce(&mypi, &pi, 1, MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD); + + if (myid == 0) { + endwtime = MPI_Wtime(); + printf("pi is approximately %.16f, Error is %.16f\n", + pi, fabs(pi - PI25DT)); + printf("wall clock time = %f\n", endwtime-startwtime); + fflush(stdout); + } + + MPI_Finalize(); + return 0; +}