Actual source code: mem.c
petsc-3.6.1 2015-08-06
2: #include <petscsys.h> /*I "petscsys.h" I*/
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
33: /*@
34: PetscMemoryGetCurrentUsage - Returns the current resident set size (memory used)
35: for the program.
37: Not Collective
39: Output Parameter:
40: . mem - memory usage in bytes
42: Options Database Key:
43: . -memory_info - Print memory usage at end of run
44: . -malloc_log - Activate logging of memory usage
46: Level: intermediate
48: Notes:
49: The memory usage reported here includes all Fortran arrays
50: (that may be used in application-defined sections of code).
51: This routine thus provides a more complete picture of memory
52: usage than PetscMallocGetCurrentUsage() for codes that employ Fortran with
53: hardwired arrays.
55: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetMaximumUsage(), PetscMallocGetCurrentUsage()
57: Concepts: resident set size
58: Concepts: memory usage
60: @*/
61: PetscErrorCode PetscMemoryGetCurrentUsage(PetscLogDouble *mem)
62: {
63: #if defined(PETSC_USE_PROCFS_FOR_SIZE)
64: FILE *file;
65: int fd;
66: char proc[PETSC_MAX_PATH_LEN];
67: prpsinfo_t prusage;
68: #elif defined(PETSC_USE_SBREAK_FOR_SIZE)
69: long *ii = sbreak(0);
70: int fd = ii - (long*)0;
71: #elif defined(PETSC_USE_PROC_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
72: FILE *file;
73: char proc[PETSC_MAX_PATH_LEN];
74: int mm,rss,err;
75: #elif defined(PETSC_HAVE_GETRUSAGE)
76: static struct rusage temp;
77: #endif
80: #if defined(PETSC_USE_PROCFS_FOR_SIZE)
82: sprintf(proc,"/proc/%d",(int)getpid());
83: if ((fd = open(proc,O_RDONLY)) == -1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to access system file %s to get memory usage data",file);
84: if (ioctl(fd,PIOCPSINFO,&prusage) == -1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_READ,"Unable to access system file %s to get memory usage data",file);
85: *mem = (PetscLogDouble)prusage.pr_byrssize;
86: close(fd);
88: #elif defined(PETSC_USE_SBREAK_FOR_SIZE)
90: *mem = (PetscLogDouble)(8*fd - 4294967296); /* 2^32 - upper bits */
92: #elif defined(PETSC_USE_PROC_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
93: sprintf(proc,"/proc/%d/statm",(int)getpid());
94: if (!(file = fopen(proc,"r"))) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to access system file %s to get memory usage data",proc);
95: if (fscanf(file,"%d %d",&mm,&rss) != 2) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"Failed to read two integers (mm and rss) from %s",proc);
96: *mem = ((PetscLogDouble)rss) * ((PetscLogDouble)getpagesize());
97: err = fclose(file);
98: if (err) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SYS,"fclose() failed on file");
100: #elif defined(PETSC_HAVE_GETRUSAGE)
101: getrusage(RUSAGE_SELF,&temp);
102: #if defined(PETSC_USE_KBYTES_FOR_SIZE)
103: *mem = 1024.0 * ((PetscLogDouble)temp.ru_maxrss);
104: #elif defined(PETSC_USE_PAGES_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
105: *mem = ((PetscLogDouble)getpagesize())*((PetscLogDouble)temp.ru_maxrss);
106: #else
107: *mem = temp.ru_maxrss;
108: #endif
110: #else
111: *mem = 0.0;
112: #endif
113: return(0);
114: }
116: PetscBool PetscMemoryCollectMaximumUsage = PETSC_FALSE;
117: PetscLogDouble PetscMemoryMaximumUsage = 0;
121: /*@
122: PetscMemoryGetMaximumUsage - Returns the maximum resident set size (memory used)
123: for the program.
125: Not Collective
127: Output Parameter:
128: . mem - memory usage in bytes
130: Options Database Key:
131: . -memory_info - Print memory usage at end of run
132: . -malloc_log - Activate logging of memory usage
134: Level: intermediate
136: Notes:
137: The memory usage reported here includes all Fortran arrays
138: (that may be used in application-defined sections of code).
139: This routine thus provides a more complete picture of memory
140: usage than PetscMallocGetCurrentUsage() for codes that employ Fortran with
141: hardwired arrays.
143: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetCurrentUsage(), PetscMallocGetCurrentUsage(),
144: PetscMemorySetGetMaximumUsage()
146: Concepts: resident set size
147: Concepts: memory usage
149: @*/
150: PetscErrorCode PetscMemoryGetMaximumUsage(PetscLogDouble *mem)
151: {
153: if (!PetscMemoryCollectMaximumUsage) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONGSTATE,"To use this function you must first call PetscMemorySetGetMaximumUsage()");
154: *mem = PetscMemoryMaximumUsage;
155: return(0);
156: }
160: /*@C
161: PetscMemorySetGetMaximumUsage - Tells PETSc to monitor the maximum memory usage so that
162: PetscMemoryGetMaximumUsage() will work.
164: Not Collective
166: Options Database Key:
167: . -memory_info - Print memory usage at end of run
168: . -malloc_log - Activate logging of memory usage
170: Level: intermediate
172: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetCurrentUsage(), PetscMallocGetCurrentUsage(),
173: PetscMemoryGetMaximumUsage()
175: Concepts: resident set size
176: Concepts: memory usage
178: @*/
179: PetscErrorCode PetscMemorySetGetMaximumUsage(void)
180: {
182: PetscMemoryCollectMaximumUsage = PETSC_TRUE;
183: return(0);
184: }