Date: 2022-03-04T17:37:07+00:00

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

     75: #if defined(PETSC_USE_PROCFS_FOR_SIZE)

     77:   sprintf(proc,"/proc/%d",(int)getpid());
     78:   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);
     79:   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);
     80:   *mem = (PetscLogDouble)prusage.pr_byrssize;
     81:   close(fd);

     83: #elif defined(PETSC_USE_SBREAK_FOR_SIZE)

     85:   *mem = (PetscLogDouble)(8*fd - 4294967296); /* 2^32 - upper bits */

     87: #elif defined(PETSC_USE_PROC_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
     88:   sprintf(proc,"/proc/%d/statm",(int)getpid());
     89:   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);
     90:   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);
     91:   *mem = ((PetscLogDouble)rss) * ((PetscLogDouble)getpagesize());
     92:   err  = fclose(file);
     93:   if (err) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SYS,"fclose() failed on file");

     95: #elif defined(PETSC_HAVE_GETRUSAGE)
     96:   getrusage(RUSAGE_SELF,&temp);
     97: #if defined(PETSC_USE_KBYTES_FOR_SIZE)
     98:   *mem = 1024.0 * ((PetscLogDouble)temp.ru_maxrss);
     99: #elif defined(PETSC_USE_PAGES_FOR_SIZE) && defined(PETSC_HAVE_GETPAGESIZE)
    100:   *mem = ((PetscLogDouble)getpagesize())*((PetscLogDouble)temp.ru_maxrss);
    101: #else
    102:   *mem = temp.ru_maxrss;
    103: #endif

    105: #else
    106:   *mem = 0.0;
    107: #endif
    108:   return(0);
    109: }

    111: PETSC_INTERN PetscBool      PetscMemoryCollectMaximumUsage;
    112: PETSC_INTERN PetscLogDouble PetscMemoryMaximumUsage;

    114: PetscBool      PetscMemoryCollectMaximumUsage = PETSC_FALSE;
    115: PetscLogDouble PetscMemoryMaximumUsage        = 0;

    117: /*@
    118:    PetscMemoryGetMaximumUsage - Returns the maximum resident set size (memory used)
    119:    for the program.

    121:    Not Collective

    123:    Output Parameter:
    124: .   mem - memory usage in bytes

    126:    Options Database Key:
    127: +  -memory_view - Print memory usage at end of run
    128: -  -malloc_log - Activate logging of memory usage

    130:    Level: intermediate

    132:    Notes:
    133:    The memory usage reported here includes all Fortran arrays
    134:    (that may be used in application-defined sections of code).
    135:    This routine thus provides a more complete picture of memory
    136:    usage than PetscMallocGetCurrentUsage() for codes that employ Fortran with
    137:    hardwired arrays.

    139: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetCurrentUsage(), PetscMallocGetCurrentUsage(),
    140:           PetscMemorySetGetMaximumUsage()

    142: @*/
    143: PetscErrorCode  PetscMemoryGetMaximumUsage(PetscLogDouble *mem)
    144: {
    146:   if (!PetscMemoryCollectMaximumUsage) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONGSTATE,"To use this function you must first call PetscMemorySetGetMaximumUsage()");
    147:   *mem = PetscMemoryMaximumUsage;
    148:   return(0);
    149: }

    151: /*@
    152:    PetscMemorySetGetMaximumUsage - Tells PETSc to monitor the maximum memory usage so that
    153:        PetscMemoryGetMaximumUsage() will work.

    155:    Not Collective

    157:    Options Database Key:
    158: +  -memory_view - Print memory usage at end of run
    159: -  -malloc_log - Activate logging of memory usage

    161:    Level: intermediate

    163: .seealso: PetscMallocGetMaximumUsage(), PetscMemoryGetCurrentUsage(), PetscMallocGetCurrentUsage(),
    164:           PetscMemoryGetMaximumUsage()

    166: @*/
    167: PetscErrorCode  PetscMemorySetGetMaximumUsage(void)
    168: {
    170:   PetscMemoryCollectMaximumUsage = PETSC_TRUE;
    171:   return(0);
    172: }