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doc: new part on how to write a StarPU application from an existing a…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| /* StarPU --- Runtime system for heterogeneous multicore architectures. | ||
| * | ||
| * Copyright (C) 2011-2022 Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria | ||
| * | ||
| * StarPU is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation; either version 2.1 of the License, or (at | ||
| * your option) any later version. | ||
| * | ||
| * StarPU is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | ||
| * | ||
| * See the GNU Lesser General Public License in COPYING.LGPL for more details. | ||
| */ | ||
|
|
||
| #include <math.h> | ||
| #include "stencil5.h" | ||
|
|
||
| //! [To be included. You should update doxygen if you see this text.] | ||
| void stencil5_cpu(double *xy, double *xm1y, double *xp1y, double *xym1, double *xyp1) | ||
| { | ||
| *xy = (*xy + *xm1y + *xp1y + *xym1 + *xyp1) / 5; | ||
| } | ||
|
|
||
| int main(int argc, char **argv) | ||
| { | ||
| int niter, n; | ||
| int x, y, loop; | ||
|
|
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| read_params(argc, argv, &n, &niter); | ||
|
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| double *A = calloc(n*n, sizeof(*A)); | ||
| fill(A, n, n); | ||
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||
| for(loop=0 ; loop<niter; loop++) | ||
| { | ||
| for (x = 0; x < n; x++) | ||
| { | ||
| for (y = 0; y < n; y++) | ||
| { | ||
| int xm1 = (x==0) ? n-1 : x-1; | ||
| int xp1 = (x==n-1) ? 0 : x+1; | ||
| int ym1 = (y==0) ? n-1 : y-1; | ||
| int yp1 = (y==n-1) ? 0 : y+1; | ||
| stencil5_cpu(&A[_(x,y,n)], | ||
| &A[_(xm1,y,n)], &A[_(xp1,y,n)], | ||
| &A[_(x,ym1,n)], &A[_(x,yp1,n)]); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return 0; | ||
| } | ||
| //! [To be included. You should update doxygen if you see this text.] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| /* StarPU --- Runtime system for heterogeneous multicore architectures. | ||
| * | ||
| * Copyright (C) 2011-2022 Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria | ||
| * | ||
| * StarPU is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation; either version 2.1 of the License, or (at | ||
| * your option) any later version. | ||
| * | ||
| * StarPU is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | ||
| * | ||
| * See the GNU Lesser General Public License in COPYING.LGPL for more details. | ||
| */ | ||
|
|
||
| #include <starpu.h> | ||
| #include <math.h> | ||
| #include "stencil5.h" | ||
|
|
||
| //! [To be included. You should update doxygen if you see this text.] | ||
| //! [starpu_codelet. You should update doxygen if you see this text.] | ||
| void stencil5_cpu(void *descr[], void *_args) | ||
| { | ||
| (void)_args; | ||
| double *xy = (double *)STARPU_VARIABLE_GET_PTR(descr[0]); | ||
| double *xm1y = (double *)STARPU_VARIABLE_GET_PTR(descr[1]); | ||
| double *xp1y = (double *)STARPU_VARIABLE_GET_PTR(descr[2]); | ||
| double *xym1 = (double *)STARPU_VARIABLE_GET_PTR(descr[3]); | ||
| double *xyp1 = (double *)STARPU_VARIABLE_GET_PTR(descr[4]); | ||
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| *xy = (*xy + *xm1y + *xp1y + *xym1 + *xyp1) / 5; | ||
| } | ||
|
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| struct starpu_codelet stencil5_cl = | ||
| { | ||
| .cpu_funcs = {stencil5_cpu}, | ||
| .nbuffers = 5, | ||
| .modes = {STARPU_RW, STARPU_R, STARPU_R, STARPU_R, STARPU_R}, | ||
| .model = &starpu_perfmodel_nop, | ||
| }; | ||
| //! [starpu_codelet. You should update doxygen if you see this text.] | ||
|
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| int main(int argc, char **argv) | ||
| { | ||
| starpu_data_handle_t *data_handles; | ||
| int ret; | ||
| int niter, n; | ||
| int x, y, loop; | ||
|
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| ret = starpu_init(NULL); | ||
| STARPU_CHECK_RETURN_VALUE(ret, "starpu_init"); | ||
|
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| read_params(argc, argv, &verbose, &n, &niter); | ||
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| double *A = calloc(n*n, sizeof(*A)); | ||
| fill(A, n, n); | ||
|
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| //! [starpu_register. You should update doxygen if you see this text.] | ||
| data_handles = malloc(n*n*sizeof(*data_handles)); | ||
| for(x = 0; x < n; x++) | ||
| { | ||
| for (y = 0; y < n; y++) | ||
| { | ||
| starpu_variable_data_register(&data_handles[_(x,y,n)], | ||
| STARPU_MAIN_RAM, | ||
| (uintptr_t)&(A[_(x,y,n)]), sizeof(double)); | ||
| } | ||
| } | ||
| //! [starpu_register. You should update doxygen if you see this text.] | ||
|
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| for(loop=0 ; loop<niter; loop++) | ||
| { | ||
| for (x = 0; x < n; x++) | ||
| { | ||
| for (y = 0; y < n; y++) | ||
| { | ||
| //! [starpu_task. You should update doxygen if you see this text.] | ||
| int xm1 = (x==0) ? n-1 : x-1; | ||
| int xp1 = (x==n-1) ? 0 : x+1; | ||
| int ym1 = (y==0) ? n-1 : y-1; | ||
| int yp1 = (y==n-1) ? 0 : y+1; | ||
| starpu_task_insert(&stencil5_cl, | ||
| STARPU_RW, data_handles[_(x,y,n)], | ||
| STARPU_R, data_handles[_(xm1,y,n)], | ||
| STARPU_R, data_handles[_(xp1,y,n)], | ||
| STARPU_R, data_handles[_(x,ym1,n)], | ||
| STARPU_R, data_handles[_(x,yp1,n)], | ||
| 0); | ||
| //! [starpu_task. You should update doxygen if you see this text.] | ||
| } | ||
| } | ||
| } | ||
| starpu_task_wait_for_all(); | ||
|
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| //! [starpu_unregister. You should update doxygen if you see this text.] | ||
| for(x = 0; x < n; x++) | ||
| { | ||
| for (y = 0; y < n; y++) | ||
| { | ||
| starpu_data_unregister(data_handles[_(x,y,n)]); | ||
| } | ||
| } | ||
| //! [starpu_unregister. You should update doxygen if you see this text.] | ||
|
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| starpu_shutdown(); | ||
| return 0; | ||
| } | ||
| //! [To be included. You should update doxygen if you see this text.] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* StarPU --- Runtime system for heterogeneous multicore architectures. | ||
| * | ||
| * Copyright (C) 2011-2022 Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria | ||
| * | ||
| * StarPU is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation; either version 2.1 of the License, or (at | ||
| * your option) any later version. | ||
| * | ||
| * StarPU is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | ||
| * | ||
| * See the GNU Lesser General Public License in COPYING.LGPL for more details. | ||
| */ | ||
|
|
||
| #include <starpu_mpi.h> | ||
| #include <math.h> | ||
| #include "stencil5.h" | ||
|
|
||
| //! [To be included. You should update doxygen if you see this text.] | ||
| void stencil5_cpu(void *descr[], void *_args); // Same as in sequential StarPU | ||
| struct starpu_codelet stencil5_cl; // Same as in sequential StarPU | ||
|
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| /* Returns the MPI node number where data indexes index is */ | ||
| int my_distrib(int x, int y, int nb_nodes) | ||
| { | ||
| return ((int)(x / sqrt(nb_nodes) + (y / sqrt(nb_nodes)) * sqrt(nb_nodes))) % nb_nodes; | ||
| } | ||
|
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| int main(int argc, char **argv) | ||
| { | ||
| starpu_data_handle_t *data_handles; | ||
| int niter, n; | ||
| int my_rank, size, x, y, loop; | ||
|
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| //! [mpi_init. You should update doxygen if you see this text.] | ||
| int ret = starpu_mpi_init_conf(&argc, &argv, 1, MPI_COMM_WORLD, NULL); | ||
| STARPU_CHECK_RETURN_VALUE(ret, "starpu_mpi_init_conf"); | ||
| starpu_mpi_comm_rank(MPI_COMM_WORLD, &my_rank); | ||
| starpu_mpi_comm_size(MPI_COMM_WORLD, &size); | ||
| //! [mpi_init. You should update doxygen if you see this text.] | ||
|
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| read_params(argc, argv, &n, &niter); | ||
|
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| double *A = calloc(n*n, sizeof(*A)); | ||
| fill(A, n, n); | ||
|
|
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| data_handles = malloc(n*n*sizeof(*data_handles)); | ||
| for(x = 0; x < n; x++) | ||
| { | ||
| for (y = 0; y < n; y++) | ||
| { | ||
| //! [mpi_register. You should update doxygen if you see this text.] | ||
| starpu_variable_data_register(&data_handles[_(x,y,n)], | ||
| STARPU_MAIN_RAM, | ||
| (uintptr_t)&(A[_(x,y,n)]), sizeof(double)); | ||
| int mpi_rank = my_distrib(x, y, size); | ||
| starpu_mpi_data_register(data_handles[_(x,y,n)], (y*n)+x, mpi_rank); | ||
| //! [mpi_register. You should update doxygen if you see this text.] | ||
| } | ||
| } | ||
|
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||
| for(loop=0 ; loop<niter; loop++) | ||
| { | ||
| for (x = 0; x < n; x++) | ||
| { | ||
| for (y = 0; y < n; y++) | ||
| { | ||
| int xm1 = (x==0) ? n-1 : x-1; | ||
| int xp1 = (x==n-1) ? 0 : x+1; | ||
| int ym1 = (y==0) ? n-1 : y-1; | ||
| int yp1 = (y==n-1) ? 0 : y+1; | ||
| //! [mpi_insert. You should update doxygen if you see this text.] | ||
| starpu_mpi_task_insert(MPI_COMM_WORLD, &stencil5_cl, | ||
| STARPU_RW, data_handles[_(x,y,n)], | ||
| STARPU_R, data_handles[_(xm1,y,n)], | ||
| STARPU_R, data_handles[_(xp1,y,n)], | ||
| STARPU_R, data_handles[_(x,ym1,n)], | ||
| STARPU_R, data_handles[_(x,yp1,n)], | ||
| 0); | ||
| //! [mpi_insert. You should update doxygen if you see this text.] | ||
| } | ||
| } | ||
| } | ||
| starpu_task_wait_for_all(); | ||
|
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| /* bring data back to node 0 and unregister it */ | ||
| for(x = 0; x < n; x++) | ||
| { | ||
| for (y = 0; y < n; y++) | ||
| { | ||
| starpu_mpi_data_migrate(MPI_COMM_WORLD, data_handles[_(x,y,n)], 0); | ||
| starpu_data_unregister(data_handles[_(x,y,n)]); | ||
| } | ||
| } | ||
|
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| starpu_mpi_shutdown(); | ||
|
|
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| return 0; | ||
| } | ||
| //! [To be included. You should update doxygen if you see this text.] |
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