1 /*
2 * Copyright (C) 2015, Northwestern University and Argonne National Laboratory
3 * See COPYRIGHT notice in top-level directory.
4 *
5 * $Id: add_var.c 2744 2016-12-28 16:25:22Z wkliao $
6 */
7
8 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
9 *
10 * This program adds two new variables to an existing netCDF file.
11 * It is used to test if PnetCDF can correctly calculate the file offsets
12 * for the two new variables, in particular for files that align the
13 * fix-size variables to a boundary larger than 4 bytes, for instance
14 * a file created by PnetCDF with defaut alignment of 512 bytes.
15 *
16 * The compile and run commands are given below.
17 *
18 * % mpicc -g -o add_var add_var.c -lpnetcdf
19 *
20 * % mpiexec -l -n 1 add_var testfile.nc
21 *
22 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <libgen.h> /* basename() */
27 #include <pnetcdf.h>
28
29 #include <testutils.h>
30
31 #define ERR {if(err!=NC_NOERR){printf("Error at line=%d: %s\n", __LINE__, ncmpi_strerror(err));}}
32
main(int argc,char ** argv)33 int main(int argc, char** argv) {
34 char filename[256], var_name[NC_MAX_NAME];
35 int i, nvars, rank, nprocs, err, nerrs=0;
36 int ncid, varid, dimid[2];
37 MPI_Offset prev_off, off;
38
39 MPI_Init(&argc, &argv);
40 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
41 MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
42
43 if (argc > 2) {
44 if (!rank) printf("Usage: %s [filename]\n",argv[0]);
45 MPI_Finalize();
46 return 0;
47 }
48 if (argc == 2) snprintf(filename, 256, "%s", argv[1]);
49 else strcpy(filename, "testfile.nc");
50 MPI_Bcast(filename, 256, MPI_CHAR, 0, MPI_COMM_WORLD);
51
52 if (rank == 0) {
53 char *cmd_str = (char*)malloc(strlen(argv[0]) + 256);
54 sprintf(cmd_str, "*** TESTING C %s for checking offsets of new variables ", basename(argv[0]));
55 printf("%-66s ------ ", cmd_str); fflush(stdout);
56 free(cmd_str);
57 }
58
59 err = ncmpi_create(MPI_COMM_WORLD, filename, NC_CLOBBER, MPI_INFO_NULL, &ncid); ERR
60
61 /* define dimensions */
62 err = ncmpi_def_dim(ncid, "dim_1", 5, &dimid[0]); ERR
63 err = ncmpi_def_dim(ncid, "dim_2", 4, &dimid[1]); ERR
64
65 /* define a bunch of variables */
66 for (i=0; i<10; i++) {
67 sprintf(var_name, "var_%d", i);
68 err = ncmpi_def_var(ncid, var_name, NC_INT, 2, dimid, &varid); ERR
69 }
70 err = ncmpi_enddef(ncid); ERR
71
72 /* re-enter define mode */
73 err = ncmpi_redef(ncid); ERR
74
75 /* add 2 new dimensions */
76 err = ncmpi_def_dim(ncid, "new_dim_1", 5, &dimid[0]); ERR
77 err = ncmpi_def_dim(ncid, "new_dim_2", 4, &dimid[1]); ERR
78
79 /* add 2 new variables */
80 err = ncmpi_def_var(ncid, "new_var1", NC_INT, 2, dimid, &varid); ERR
81 err = ncmpi_def_var(ncid, "new_var2", NC_FLOAT, 2, dimid, &varid); ERR
82 err = ncmpi_enddef(ncid); ERR
83
84 err = ncmpi_inq_nvars(ncid, &nvars); ERR
85 err = ncmpi_inq_varoffset(ncid, 0, &prev_off); ERR
86 for (i=1; i<nvars; i++) {
87 err = ncmpi_inq_varoffset(ncid, i, &off); ERR
88 if (off < prev_off + 5*4*4) { /* each variable is of size 5*4*4 bytes */
89 err = ncmpi_inq_varname(ncid, i, var_name); ERR
90 printf("Error in %s line %d: variable %s offset is set incorrectly\n",
91 __FILE__,__LINE__,var_name);
92 nerrs++;
93 }
94 prev_off = off;
95 }
96
97 err = ncmpi_close(ncid); ERR
98
99 /* check if PnetCDF freed all internal malloc */
100 MPI_Offset malloc_size, sum_size;
101 err = ncmpi_inq_malloc_size(&malloc_size);
102 if (err == NC_NOERR) {
103 MPI_Reduce(&malloc_size, &sum_size, 1, MPI_OFFSET, MPI_SUM, 0, MPI_COMM_WORLD);
104 if (rank == 0 && sum_size > 0)
105 printf("heap memory allocated by PnetCDF internally has %lld bytes yet to be freed\n",
106 sum_size);
107 }
108
109 MPI_Allreduce(MPI_IN_PLACE, &nerrs, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
110 if (rank == 0) {
111 if (nerrs) printf(FAIL_STR,nerrs);
112 else printf(PASS_STR);
113 }
114
115 MPI_Finalize();
116 return 0;
117 }
118
119