Actual source code: mem.c
1: #define PETSC_DLL
3: #include petsc.h
4: #include petscsys.h
5: #include "petscfix.h"
6: #if defined(PETSC_HAVE_PWD_H)
7: #include <pwd.h>
8: #endif
9: #include <ctype.h>
10: #include <sys/types.h>
11: #include <sys/stat.h>
12: #if defined(PETSC_HAVE_UNISTD_H)
13: #include <unistd.h>
14: #endif
15: #if defined(PETSC_HAVE_STDLIB_H)
16: #include <stdlib.h>
17: #endif
18: #if defined(PETSC_HAVE_SYS_UTSNAME_H)
19: #include <sys/utsname.h>
20: #endif
21: #include <fcntl.h>
22: #include <time.h>
23: #if defined(PETSC_HAVE_SYS_SYSTEMINFO_H)
24: #include <sys/systeminfo.h>
25: #endif
26: #include "petscfix.h"
28: #if defined(PETSC_HAVE_TASK_INFO)
29: #include <mach/mach.h>
30: #endif
32: #if defined(PETSC_HAVE_SYS_RESOURCE_H)
33: #include <sys/resource.h>
34: #endif
35: #if defined(PETSC_HAVE_SYS_PROCFS_H)
36: /* #include <sys/int_types.h> Required if using gcc on solaris 2.6 */
37: #include <sys/procfs.h>
38: #endif
39: #if defined(PETSC_HAVE_FCNTL_H)
40: #include <fcntl.h>
41: #endif
45: /*@C
46: PetscMemoryGetCurrentUsage - Returns the current resident set size (memory used)
47: for the program.
49: Not Collective
51: Output Parameter:
52: . mem - memory usage in bytes
54: Options Database Key:
55: . -memory_info - Print memory usage at end of run
56: . -malloc_log - Activate logging of memory usage
58: Level: intermediate
60: Notes:
61: The memory usage reported here includes all Fortran arrays
62: (that may be used in application-defined sections of code).
63: This routine thus provides a more complete picture of memory
64: usage than PetscMallocGetCurrentUsage() for codes that employ Fortran with
65: hardwired arrays.
67: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetMaximumUsage(), PetscMallocGetCurrentUsage()
69: Concepts: resident set size
70: Concepts: memory usage
72: @*/
73: PetscErrorCode PETSC_DLLEXPORT PetscMemoryGetCurrentUsage(PetscLogDouble *mem)
74: {
75: #if defined(PETSC_USE_PROCFS_FOR_SIZE)
76: FILE *file;
77: int fd;
78: char proc[PETSC_MAX_PATH_LEN];
79: prpsinfo_t prusage;
80: #elif defined(PETSC_USE_SBREAK_FOR_SIZE)
81: long *ii = sbreak(0);
82: int fd = ii - (long*)0;
83: #elif defined(PETSC_USE_PROC_FOR_SIZE)
84: FILE *file;
85: char proc[PETSC_MAX_PATH_LEN];
86: int mm,rss;
87: #elif defined(PETSC_HAVE_TASK_INFO)
88: task_basic_info_data_t ti;
89: unsigned int count;
90: /*
91: The next line defined variables that are not used; but if they
92: are not included the code crashes. Something must be wrong
93: with either the task_info() command or compiler corrupting the
94: stack.
95: */
96: task_basic_info_data_t ti1,ti2;
97: #elif defined(PETSC_HAVE_GETRUSAGE)
98: static struct rusage temp;
99: #endif
102: #if defined(PETSC_USE_PROCFS_FOR_SIZE)
104: sprintf(proc,"/proc/%d",(int)getpid());
105: if ((fd = open(proc,O_RDONLY)) == -1) {
106: SETERRQ1(PETSC_ERR_FILE_OPEN,"Unable to access system file %s to get memory usage data",file);
107: }
108: if (ioctl(fd,PIOCPSINFO,&prusage) == -1) {
109: SETERRQ1(PETSC_ERR_FILE_READ,"Unable to access system file %s to get memory usage data",file);
110: }
111: *mem = (double)prusage.pr_byrssize;
112: close(fd);
114: #elif defined(PETSC_USE_SBREAK_FOR_SIZE)
116: *mem = (PetscLogDouble)(8*fd - 4294967296); /* 2^32 - upper bits */
118: #elif defined(PETSC_USE_PROC_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
119: sprintf(proc,"/proc/%d/statm",(int)getpid());
120: if (!(file = fopen(proc,"r"))) {
121: SETERRQ1(PETSC_ERR_FILE_OPEN,"Unable to access system file %s to get memory usage data",proc);
122: }
123: fscanf(file,"%d %d",&mm,&rss);
124: *mem = rss * (getpagesize());
125: fclose(file);
127: #elif defined(PETSC_HAVE_TASK_INFO)
128: if (task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&ti,&count) != KERN_SUCCESS) SETERRQ(PETSC_ERR_LIB,"Mach system call failed");
129: *mem = (PetscLogDouble) ti.resident_size;
130:
131: #elif defined(PETSC_HAVE_GETRUSAGE)
133: getrusage(RUSAGE_SELF,&temp);
134: #if defined(PETSC_USE_KBYTES_FOR_SIZE)
135: *mem = 1024.0 * ((double)temp.ru_maxrss);
136: #else
137: *mem = ((double)getpagesize())*((double)temp.ru_maxrss);
138: #endif
140: #else
141: *mem = 0.0;
142: #endif
143: return(0);
144: }
146: PetscTruth PetscMemoryCollectMaximumUsage = PETSC_FALSE;
147: PetscLogDouble PetscMemoryMaximumUsage = 0;
151: /*@C
152: PetscMemoryGetMaximumUsage - Returns the maximum resident set size (memory used)
153: for the program.
155: Not Collective
157: Output Parameter:
158: . mem - memory usage in bytes
160: Options Database Key:
161: . -memory_info - Print memory usage at end of run
162: . -malloc_log - Activate logging of memory usage
164: Level: intermediate
166: Notes:
167: The memory usage reported here includes all Fortran arrays
168: (that may be used in application-defined sections of code).
169: This routine thus provides a more complete picture of memory
170: usage than PetscMallocGetCurrentUsage() for codes that employ Fortran with
171: hardwired arrays.
173: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetCurrentUsage(), PetscMallocGetCurrentUsage(),
174: PetscMemorySetGetMaximumUsage()
176: Concepts: resident set size
177: Concepts: memory usage
179: @*/
180: PetscErrorCode PETSC_DLLEXPORT PetscMemoryGetMaximumUsage(PetscLogDouble *mem)
181: {
183: if (!PetscMemoryCollectMaximumUsage) SETERRQ(PETSC_ERR_ARG_WRONGSTATE,"To use this function you must first call PetscMemorySetGetMaximumUsage()");
184: *mem = PetscMemoryMaximumUsage;
185: return(0);
186: }
190: /*@C
191: PetscMemorySetGetMaximumUsage - Tells PETSc to monitor the maximum memory usage so that
192: PetscMemoryGetMaximumUsage() will work.
194: Not Collective
196: Options Database Key:
197: . -memory_info - Print memory usage at end of run
198: . -malloc_log - Activate logging of memory usage
200: Level: intermediate
202: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetCurrentUsage(), PetscMallocGetCurrentUsage(),
203: PetscMemoryGetMaximumUsage()
205: Concepts: resident set size
206: Concepts: memory usage
208: @*/
209: PetscErrorCode PETSC_DLLEXPORT PetscMemorySetGetMaximumUsage(void)
210: {
212: PetscMemoryCollectMaximumUsage = PETSC_TRUE;
213: return(0);
214: }