Actual source code: mem.c
1: #define PETSC_DESIRE_FEATURE_TEST_MACROS /* for getpagesize() with c89 */
2: #include <petscsys.h>
3: #if defined(PETSC_HAVE_PWD_H)
4: #include <pwd.h>
5: #endif
6: #include <ctype.h>
7: #include <sys/stat.h>
8: #if defined(PETSC_HAVE_UNISTD_H)
9: #include <unistd.h>
10: #endif
11: #if defined(PETSC_HAVE_SYS_UTSNAME_H)
12: #include <sys/utsname.h>
13: #endif
14: #include <fcntl.h>
15: #include <time.h>
16: #if defined(PETSC_HAVE_SYS_SYSTEMINFO_H)
17: #include <sys/systeminfo.h>
18: #endif
20: #if defined(PETSC_HAVE_SYS_RESOURCE_H)
21: #include <sys/resource.h>
22: #endif
23: #if defined(PETSC_HAVE_SYS_PROCFS_H)
24: /* #include <sys/int_types.h> Required if using gcc on solaris 2.6 */
25: #include <sys/procfs.h>
26: #endif
27: #if defined(PETSC_HAVE_FCNTL_H)
28: #include <fcntl.h>
29: #endif
31: /*@
32: PetscMemoryGetCurrentUsage - Returns the current resident set size (memory used)
33: for the program.
35: Not Collective
37: Output Parameter:
38: . mem - memory usage in bytes
40: Options Database Key:
41: + -memory_view - Print memory usage at end of run
42: - -malloc_log - Activate logging of memory usage
44: Level: intermediate
46: Notes:
47: The memory usage reported here includes all Fortran arrays
48: (that may be used in application-defined sections of code).
49: This routine thus provides a more complete picture of memory
50: usage than PetscMallocGetCurrentUsage() for codes that employ Fortran with
51: hardwired arrays.
53: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetMaximumUsage(), PetscMallocGetCurrentUsage(), PetscMemorySetGetMaximumUsage(), PetscMemoryView()
55: @*/
56: PetscErrorCode PetscMemoryGetCurrentUsage(PetscLogDouble *mem)
57: {
58: #if defined(PETSC_USE_PROCFS_FOR_SIZE)
59: FILE *file;
60: int fd;
61: char proc[PETSC_MAX_PATH_LEN];
62: prpsinfo_t prusage;
63: #elif defined(PETSC_USE_SBREAK_FOR_SIZE)
64: long *ii = sbreak(0);
65: int fd = ii - (long*)0;
66: #elif defined(PETSC_USE_PROC_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
67: FILE *file;
68: char proc[PETSC_MAX_PATH_LEN];
69: int mm,rss,err;
70: #elif defined(PETSC_HAVE_GETRUSAGE)
71: static struct rusage temp;
72: #endif
74: #if defined(PETSC_USE_PROCFS_FOR_SIZE)
76: sprintf(proc,"/proc/%d",(int)getpid());
79: *mem = (PetscLogDouble)prusage.pr_byrssize;
80: close(fd);
82: #elif defined(PETSC_USE_SBREAK_FOR_SIZE)
84: *mem = (PetscLogDouble)(8*fd - 4294967296); /* 2^32 - upper bits */
86: #elif defined(PETSC_USE_PROC_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
87: sprintf(proc,"/proc/%d/statm",(int)getpid());
90: *mem = ((PetscLogDouble)rss) * ((PetscLogDouble)getpagesize());
91: err = fclose(file);
94: #elif defined(PETSC_HAVE_GETRUSAGE)
95: getrusage(RUSAGE_SELF,&temp);
96: #if defined(PETSC_USE_KBYTES_FOR_SIZE)
97: *mem = 1024.0 * ((PetscLogDouble)temp.ru_maxrss);
98: #elif defined(PETSC_USE_PAGES_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
99: *mem = ((PetscLogDouble)getpagesize())*((PetscLogDouble)temp.ru_maxrss);
100: #else
101: *mem = temp.ru_maxrss;
102: #endif
104: #else
105: *mem = 0.0;
106: #endif
107: return 0;
108: }
110: PETSC_INTERN PetscBool PetscMemoryCollectMaximumUsage;
111: PETSC_INTERN PetscLogDouble PetscMemoryMaximumUsage;
113: PetscBool PetscMemoryCollectMaximumUsage = PETSC_FALSE;
114: PetscLogDouble PetscMemoryMaximumUsage = 0;
116: /*@
117: PetscMemoryGetMaximumUsage - Returns the maximum resident set size (memory used)
118: for the program.
120: Not Collective
122: Output Parameter:
123: . mem - memory usage in bytes
125: Options Database Key:
126: + -memory_view - Print memory usage at end of run
127: - -malloc_log - Activate logging of memory usage
129: Level: intermediate
131: Notes:
132: The memory usage reported here includes all Fortran arrays
133: (that may be used in application-defined sections of code).
134: This routine thus provides a more complete picture of memory
135: usage than PetscMallocGetCurrentUsage() for codes that employ Fortran with
136: hardwired arrays.
138: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetCurrentUsage(), PetscMallocGetCurrentUsage(),
139: PetscMemorySetGetMaximumUsage()
141: @*/
142: PetscErrorCode PetscMemoryGetMaximumUsage(PetscLogDouble *mem)
143: {
145: *mem = PetscMemoryMaximumUsage;
146: return 0;
147: }
149: /*@
150: PetscMemorySetGetMaximumUsage - Tells PETSc to monitor the maximum memory usage so that
151: PetscMemoryGetMaximumUsage() will work.
153: Not Collective
155: Options Database Key:
156: + -memory_view - Print memory usage at end of run
157: - -malloc_log - Activate logging of memory usage
159: Level: intermediate
161: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetCurrentUsage(), PetscMallocGetCurrentUsage(),
162: PetscMemoryGetMaximumUsage()
164: @*/
165: PetscErrorCode PetscMemorySetGetMaximumUsage(void)
166: {
167: PetscMemoryCollectMaximumUsage = PETSC_TRUE;
168: return 0;
169: }