Date: 2022-03-31T04:46:06+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

     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: }