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

Actual source code: mal.c

      1: /*
      2:     Code that allows a user to dictate what malloc() PETSc uses.
      3: */
      4: #include <petscsys.h>
      5: #include <stdarg.h>
      6: #if defined(PETSC_HAVE_MALLOC_H)
      7: #include <malloc.h>
      8: #endif
      9: #if defined(PETSC_HAVE_MEMKIND)
     10: #include <errno.h>
     11: #include <memkind.h>
     12: typedef enum {PETSC_MK_DEFAULT=0,PETSC_MK_HBW_PREFERRED=1} PetscMemkindType;
     13: PetscMemkindType currentmktype = PETSC_MK_HBW_PREFERRED;
     14: PetscMemkindType previousmktype = PETSC_MK_HBW_PREFERRED;
     15: #endif
     16: /*
     17:         We want to make sure that all mallocs of double or complex numbers are complex aligned.
     18:     1) on systems with memalign() we call that routine to get an aligned memory location
     19:     2) on systems without memalign() we
     20:        - allocate one sizeof(PetscScalar) extra space
     21:        - we shift the pointer up slightly if needed to get PetscScalar aligned
     22:        - if shifted we store at ptr[-1] the amount of shift (plus a classid)
     23: */
     24: #define SHIFT_CLASSID 456123

     26: PETSC_EXTERN PetscErrorCode PetscMallocAlign(size_t mem,PetscBool clear,int line,const char func[],const char file[],void **result)
     27: {
     29: #if defined(PETSC_HAVE_MEMKIND)
     30:   int            err;
     31: #endif

     33:   if (!mem) {*result = NULL; return 0;}
     34: #if defined(PETSC_HAVE_MEMKIND)
     35:   {
     36:     if (!currentmktype) err = memkind_posix_memalign(MEMKIND_DEFAULT,result,PETSC_MEMALIGN,mem);
     37:     else err = memkind_posix_memalign(MEMKIND_HBW_PREFERRED,result,PETSC_MEMALIGN,mem);
     38:     if (err == EINVAL) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_MEM,"Memkind: invalid 3rd or 4th argument of memkind_posix_memalign()");
     39:     if (err == ENOMEM) PetscInfo1(0,"Memkind: fail to request HBW memory %.0f, falling back to normal memory\n",(PetscLogDouble)mem);
     40:     if (!*result) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_MEM,PETSC_ERROR_INITIAL,"Memory requested %.0f",(PetscLogDouble)mem);
     41:     if (clear) {PetscMemzero(*result,mem);}
     42:   }
     43: #else
     44: #  if defined(PETSC_HAVE_DOUBLE_ALIGN_MALLOC) && (PETSC_MEMALIGN == 8)
     45:   if (clear) {
     46:     *result = calloc(1+mem/sizeof(int),sizeof(int));
     47:   } else {
     48:     *result = malloc(mem);
     49:   }
     50:   if (!*result) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_MEM,PETSC_ERROR_INITIAL,"Memory requested %.0f",(PetscLogDouble)mem);
     51:   if (PetscLogMemory) {PetscMemzero(*result,mem);}

     53: #  elif defined(PETSC_HAVE_MEMALIGN)
     54:   *result = memalign(PETSC_MEMALIGN,mem);
     55:   if (!*result) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_MEM,PETSC_ERROR_INITIAL,"Memory requested %.0f",(PetscLogDouble)mem);
     56:   if (clear || PetscLogMemory) {
     57:     PetscMemzero(*result,mem);
     58:   }
     59: #  else
     60:   {
     61:     int *ptr,shift;
     62:     /*
     63:       malloc space for two extra chunks and shift ptr 1 + enough to get it PetscScalar aligned
     64:     */
     65:     if (clear) {
     66:       ptr = (int*)calloc(1+(mem + 2*PETSC_MEMALIGN)/sizeof(int),sizeof(int));
     67:     } else {
     68:       ptr = (int*)malloc(mem + 2*PETSC_MEMALIGN);
     69:     }
     70:     if (!ptr) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_MEM,PETSC_ERROR_INITIAL,"Memory requested %.0f",(PetscLogDouble)mem);
     71:     shift        = (int)(((PETSC_UINTPTR_T) ptr) % PETSC_MEMALIGN);
     72:     shift        = (2*PETSC_MEMALIGN - shift)/sizeof(int);
     73:     ptr[shift-1] = shift + SHIFT_CLASSID;
     74:     ptr         += shift;
     75:     *result      = (void*)ptr;
     76:     if (PetscLogMemory) {PetscMemzero(*result,mem);}
     77:   }
     78: #  endif
     79: #endif
     80:   return 0;
     81: }

     83: PETSC_EXTERN PetscErrorCode PetscFreeAlign(void *ptr,int line,const char func[],const char file[])
     84: {
     85:   if (!ptr) return 0;
     86: #if defined(PETSC_HAVE_MEMKIND)
     87:   memkind_free(0,ptr); /* specify the kind to 0 so that memkind will look up for the right type */
     88: #else
     89: #  if (!(defined(PETSC_HAVE_DOUBLE_ALIGN_MALLOC) && (PETSC_MEMALIGN == 8)) && !defined(PETSC_HAVE_MEMALIGN))
     90:   {
     91:     /*
     92:       Previous int tells us how many ints the pointer has been shifted from
     93:       the original address provided by the system malloc().
     94:     */
     95:     int shift = *(((int*)ptr)-1) - SHIFT_CLASSID;
     96:     if (shift > PETSC_MEMALIGN-1) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_PLIB,PETSC_ERROR_INITIAL,"Likely memory corruption in heap");
     97:     if (shift < 0) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_PLIB,PETSC_ERROR_INITIAL,"Likely memory corruption in heap");
     98:     ptr = (void*)(((int*)ptr) - shift);
     99:   }
    100: #  endif

    102: #  if defined(PETSC_HAVE_FREE_RETURN_INT)
    103:   int err = free(ptr);
    104:   if (err) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_PLIB,PETSC_ERROR_INITIAL,"System free returned error %d\n",err);
    105: #  else
    106:   free(ptr);
    107: #  endif
    108: #endif
    109:   return 0;
    110: }

    112: PETSC_EXTERN PetscErrorCode PetscReallocAlign(size_t mem, int line, const char func[], const char file[], void **result)
    113: {

    116:   if (!mem) {
    117:     PetscFreeAlign(*result, line, func, file);
    118:     if (ierr) return ierr;
    119:     *result = NULL;
    120:     return 0;
    121:   }
    122: #if defined(PETSC_HAVE_MEMKIND)
    123:   if (!currentmktype) *result = memkind_realloc(MEMKIND_DEFAULT,*result,mem);
    124:   else *result = memkind_realloc(MEMKIND_HBW_PREFERRED,*result,mem);
    125: #else
    126: #  if (!(defined(PETSC_HAVE_DOUBLE_ALIGN_MALLOC) && (PETSC_MEMALIGN == 8)) && !defined(PETSC_HAVE_MEMALIGN))
    127:   {
    128:     /*
    129:       Previous int tells us how many ints the pointer has been shifted from
    130:       the original address provided by the system malloc().
    131:     */
    132:     int shift = *(((int*)*result)-1) - SHIFT_CLASSID;
    133:     if (shift > PETSC_MEMALIGN-1) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_PLIB,PETSC_ERROR_INITIAL,"Likely memory corruption in heap");
    134:     if (shift < 0) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_PLIB,PETSC_ERROR_INITIAL,"Likely memory corruption in heap");
    135:     *result = (void*)(((int*)*result) - shift);
    136:   }
    137: #  endif

    139: #  if (defined(PETSC_HAVE_DOUBLE_ALIGN_MALLOC) && (PETSC_MEMALIGN == 8)) || defined(PETSC_HAVE_MEMALIGN)
    140:   *result = realloc(*result, mem);
    141: #  else
    142:   {
    143:     /*
    144:       malloc space for two extra chunks and shift ptr 1 + enough to get it PetscScalar aligned
    145:     */
    146:     int *ptr = (int *) realloc(*result, mem + 2*PETSC_MEMALIGN);
    147:     if (ptr) {
    148:       int shift    = (int)(((PETSC_UINTPTR_T) ptr) % PETSC_MEMALIGN);
    149:       shift        = (2*PETSC_MEMALIGN - shift)/sizeof(int);
    150:       ptr[shift-1] = shift + SHIFT_CLASSID;
    151:       ptr         += shift;
    152:       *result      = (void*)ptr;
    153:     } else {
    154:       *result      = NULL;
    155:     }
    156:   }
    157: #  endif
    158: #endif
    159:   if (!*result) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_MEM,PETSC_ERROR_INITIAL,"Memory requested %.0f",(PetscLogDouble)mem);
    160: #if defined(PETSC_HAVE_MEMALIGN)
    161:   /* There are no standard guarantees that realloc() maintains the alignment of memalign(), so I think we have to
    162:    * realloc and, if the alignment is wrong, malloc/copy/free. */
    163:   if (((size_t) (*result)) % PETSC_MEMALIGN) {
    164:     void *newResult;
    165: #  if defined(PETSC_HAVE_MEMKIND)
    166:     {
    167:       int err;
    168:       if (!currentmktype) err = memkind_posix_memalign(MEMKIND_DEFAULT,&newResult,PETSC_MEMALIGN,mem);
    169:       else err = memkind_posix_memalign(MEMKIND_HBW_PREFERRED,&newResult,PETSC_MEMALIGN,mem);
    170:       if (err == EINVAL) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_MEM,"Memkind: invalid 3rd or 4th argument of memkind_posix_memalign()");
    171:       if (err == ENOMEM) PetscInfo1(0,"Memkind: fail to request HBW memory %.0f, falling back to normal memory\n",(PetscLogDouble)mem);
    172:     }
    173: #  else
    174:     newResult = memalign(PETSC_MEMALIGN,mem);
    175: #  endif
    176:     if (!newResult) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_MEM,PETSC_ERROR_INITIAL,"Memory requested %.0f",(PetscLogDouble)mem);
    177:     PetscMemcpy(newResult,*result,mem);
    178:     if (ierr) return ierr;
    179: #  if defined(PETSC_HAVE_FREE_RETURN_INT)
    180:     {
    181:       int err = free(*result);
    182:       if (err) return PetscError(PETSC_COMM_SELF,line,func,file,PETSC_ERR_PLIB,PETSC_ERROR_INITIAL,"System free returned error %d\n",err);
    183:     }
    184: #  else
    185: #    if defined(PETSC_HAVE_MEMKIND)
    186:     memkind_free(0,*result);
    187: #    else
    188:     free(*result);
    189: #    endif
    190: #  endif
    191:     *result = newResult;
    192:   }
    193: #endif
    194:   return 0;
    195: }

    197: PetscErrorCode (*PetscTrMalloc)(size_t,PetscBool,int,const char[],const char[],void**) = PetscMallocAlign;
    198: PetscErrorCode (*PetscTrFree)(void*,int,const char[],const char[])                     = PetscFreeAlign;
    199: PetscErrorCode (*PetscTrRealloc)(size_t,int,const char[],const char[],void**)          = PetscReallocAlign;

    201: PETSC_INTERN PetscBool petscsetmallocvisited;
    202: PetscBool petscsetmallocvisited = PETSC_FALSE;

    204: /*@C
    205:    PetscMallocSet - Sets the routines used to do mallocs and frees.
    206:    This routine MUST be called before PetscInitialize() and may be
    207:    called only once.

    209:    Not Collective

    211:    Input Parameters:
    212: + imalloc - the routine that provides the malloc (also provides calloc(), which is used depends on the second argument)
    213: . ifree - the routine that provides the free
    214: - iralloc - the routine that provides the realloc

    216:    Level: developer

    218: @*/
    219: PetscErrorCode PetscMallocSet(PetscErrorCode (*imalloc)(size_t,PetscBool,int,const char[],const char[],void**),
    220:                               PetscErrorCode (*ifree)(void*,int,const char[],const char[]),
    221:                               PetscErrorCode (*iralloc)(size_t, int, const char[], const char[], void **))
    222: {
    224:   if (petscsetmallocvisited && (imalloc != PetscTrMalloc || ifree != PetscTrFree)) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"cannot call multiple times");
    225:   PetscTrMalloc         = imalloc;
    226:   PetscTrFree           = ifree;
    227:   PetscTrRealloc        = iralloc;
    228:   petscsetmallocvisited = PETSC_TRUE;
    229:   return(0);
    230: }

    232: /*@C
    233:    PetscMallocClear - Resets the routines used to do mallocs and frees to the defaults.

    235:    Not Collective

    237:    Level: developer

    239:    Notes:
    240:     In general one should never run a PETSc program with different malloc() and
    241:     free() settings for different parts; this is because one NEVER wants to
    242:     free() an address that was malloced by a different memory management system

    244:     Called in PetscFinalize() so that if PetscInitialize() is called again it starts with a fresh slate of allocation information

    246: @*/
    247: PetscErrorCode PetscMallocClear(void)
    248: {
    250:   PetscTrMalloc         = PetscMallocAlign;
    251:   PetscTrFree           = PetscFreeAlign;
    252:   PetscTrRealloc        = PetscReallocAlign;
    253:   petscsetmallocvisited = PETSC_FALSE;
    254:   return(0);
    255: }

    257: PetscErrorCode PetscMemoryTrace(const char label[])
    258: {
    259:   PetscErrorCode        ierr;
    260:   PetscLogDouble        mem,mal;
    261:   static PetscLogDouble oldmem = 0,oldmal = 0;

    264:   PetscMemoryGetCurrentUsage(&mem);
    265:   PetscMallocGetCurrentUsage(&mal);

    267:   PetscPrintf(PETSC_COMM_WORLD,"%s High water  %8.3f MB increase %8.3f MB Current %8.3f MB increase %8.3f MB\n",label,mem*1e-6,(mem - oldmem)*1e-6,mal*1e-6,(mal - oldmal)*1e-6);
    268:   oldmem = mem;
    269:   oldmal = mal;
    270:   return(0);
    271: }

    273: static PetscErrorCode (*PetscTrMallocOld)(size_t,PetscBool,int,const char[],const char[],void**) = PetscMallocAlign;
    274: static PetscErrorCode (*PetscTrReallocOld)(size_t,int,const char[],const char[],void**)          = PetscReallocAlign;
    275: static PetscErrorCode (*PetscTrFreeOld)(void*,int,const char[],const char[])                     = PetscFreeAlign;

    277: /*@C
    278:    PetscMallocSetDRAM - Set PetscMalloc to use DRAM.
    279:      If memkind is available, change the memkind type. Otherwise, switch the
    280:      current malloc and free routines to the PetscMallocAlign and
    281:      PetscFreeAlign (PETSc default).

    283:    Not Collective

    285:    Level: developer

    287:    Notes:
    288:      This provides a way to do the allocation on DRAM temporarily. One
    289:      can switch back to the previous choice by calling PetscMallocReset().

    291: .seealso: PetscMallocReset()
    292: @*/
    293: PetscErrorCode PetscMallocSetDRAM(void)
    294: {
    296:   if (PetscTrMalloc == PetscMallocAlign) {
    297: #if defined(PETSC_HAVE_MEMKIND)
    298:     previousmktype = currentmktype;
    299:     currentmktype  = PETSC_MK_DEFAULT;
    300: #endif
    301:   } else {
    302:     /* Save the previous choice */
    303:     PetscTrMallocOld  = PetscTrMalloc;
    304:     PetscTrReallocOld = PetscTrRealloc;
    305:     PetscTrFreeOld    = PetscTrFree;
    306:     PetscTrMalloc     = PetscMallocAlign;
    307:     PetscTrFree       = PetscFreeAlign;
    308:     PetscTrRealloc    = PetscReallocAlign;
    309:   }
    310:   return(0);
    311: }

    313: /*@C
    314:    PetscMallocResetDRAM - Reset the changes made by PetscMallocSetDRAM

    316:    Not Collective

    318:    Level: developer

    320: .seealso: PetscMallocSetDRAM()
    321: @*/
    322: PetscErrorCode PetscMallocResetDRAM(void)
    323: {
    325:   if (PetscTrMalloc == PetscMallocAlign) {
    326: #if defined(PETSC_HAVE_MEMKIND)
    327:     currentmktype = previousmktype;
    328: #endif
    329:   } else {
    330:     /* Reset to the previous choice */
    331:     PetscTrMalloc  = PetscTrMallocOld;
    332:     PetscTrRealloc = PetscTrReallocOld;
    333:     PetscTrFree    = PetscTrFreeOld;
    334:   }
    335:   return(0);
    336: }

    338: static PetscBool petscmalloccoalesce =
    339: #if defined(PETSC_USE_MALLOC_COALESCED)
    340:   PETSC_TRUE;
    341: #else
    342:   PETSC_FALSE;
    343: #endif

    345: /*@C
    346:    PetscMallocSetCoalesce - Use coalesced malloc when allocating groups of objects

    348:    Not Collective

    350:    Input Parameters:
    351: .  coalesce - PETSC_TRUE to use coalesced malloc for multi-object allocation.

    353:    Options Database Keys:
    354: .  -malloc_coalesce - turn coalesced malloc on or off

    356:    Note:
    357:    PETSc uses coalesced malloc by default for optimized builds and not for debugging builds.  This default can be changed via the command-line option -malloc_coalesce or by calling this function.
    358:    This function can only be called immediately after PetscInitialize()

    360:    Level: developer

    362: .seealso: PetscMallocA()
    363: @*/
    364: PetscErrorCode PetscMallocSetCoalesce(PetscBool coalesce)
    365: {
    367:   petscmalloccoalesce = coalesce;
    368:   return(0);
    369: }

    371: /*@C
    372:    PetscMallocA - Allocate and optionally clear one or more objects, possibly using coalesced malloc

    374:    Not Collective

    376:    Input Parameters:
    377: +  n - number of objects to allocate (at least 1)
    378: .  clear - use calloc() to allocate space initialized to zero
    379: .  lineno - line number to attribute allocation (typically __LINE__)
    380: .  function - function to attribute allocation (typically PETSC_FUNCTION_NAME)
    381: .  filename - file name to attribute allocation (typically __FILE__)
    382: -  bytes0 - first of n object sizes

    384:    Output Parameters:
    385: .  ptr0 - first of n pointers to allocate

    387:    Notes:
    388:    This function is not normally called directly by users, but rather via the macros PetscMalloc1(), PetscMalloc2(), or PetscCalloc1(), etc.

    390:    Level: developer

    392: .seealso: PetscMallocAlign(), PetscMallocSet(), PetscMalloc1(), PetscMalloc2(), PetscMalloc3(), PetscMalloc4(), PetscMalloc5(), PetscMalloc6(), PetscMalloc7(), PetscCalloc1(), PetscCalloc2(), PetscCalloc3(), PetscCalloc4(), PetscCalloc5(), PetscCalloc6(), PetscCalloc7(), PetscFreeA()
    393: @*/
    394: PetscErrorCode PetscMallocA(int n,PetscBool clear,int lineno,const char *function,const char *filename,size_t bytes0,void *ptr0,...)
    395: {
    397:   va_list        Argp;
    398:   size_t         bytes[8],sumbytes;
    399:   void           **ptr[8];
    400:   int            i;

    403:   if (n > 8) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Attempt to allocate %d objects but only 8 supported",n);
    404:   bytes[0] = bytes0;
    405:   ptr[0] = (void**)ptr0;
    406:   sumbytes = (bytes0 + PETSC_MEMALIGN-1) & ~(PETSC_MEMALIGN-1);
    407:   va_start(Argp,ptr0);
    408:   for (i=1; i<n; i++) {
    409:     bytes[i] = va_arg(Argp,size_t);
    410:     ptr[i] = va_arg(Argp,void**);
    411:     sumbytes += (bytes[i] + PETSC_MEMALIGN-1) & ~(PETSC_MEMALIGN-1);
    412:   }
    413:   va_end(Argp);
    414:   if (petscmalloccoalesce) {
    415:     char *p;
    416:     (*PetscTrMalloc)(sumbytes,clear,lineno,function,filename,(void**)&p);
    417:     for (i=0; i<n; i++) {
    418:       *ptr[i] = bytes[i] ? p : NULL;
    419:       p = (char*)PetscAddrAlign(p + bytes[i]);
    420:     }
    421:   } else {
    422:     for (i=0; i<n; i++) {
    423:       (*PetscTrMalloc)(bytes[i],clear,lineno,function,filename,(void**)ptr[i]);
    424:     }
    425:   }
    426:   return(0);
    427: }

    429: /*@C
    430:    PetscFreeA - Free one or more objects, possibly allocated using coalesced malloc

    432:    Not Collective

    434:    Input Parameters:
    435: +  n - number of objects to free (at least 1)
    436: .  lineno - line number to attribute deallocation (typically __LINE__)
    437: .  function - function to attribute deallocation (typically PETSC_FUNCTION_NAME)
    438: .  filename - file name to attribute deallocation (typically __FILE__)
    439: -  ptr0 ... - first of n pointers to free

    441:    Note:
    442:    This function is not normally called directly by users, but rather via the macros PetscFree(), PetscFree2(), etc.

    444:    The pointers are zeroed to prevent users from accidentally reusing space that has been freed.

    446:    Level: developer

    448: .seealso: PetscMallocAlign(), PetscMallocSet(), PetscMallocA(), PetscFree1(), PetscFree2(), PetscFree3(), PetscFree4(), PetscFree5(), PetscFree6(), PetscFree7()
    449: @*/
    450: PetscErrorCode PetscFreeA(int n,int lineno,const char *function,const char *filename,void *ptr0,...)
    451: {
    453:   va_list        Argp;
    454:   void           **ptr[8];
    455:   int            i;

    458:   if (n > 8) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Attempt to allocate %d objects but only up to 8 supported",n);
    459:   ptr[0] = (void**)ptr0;
    460:   va_start(Argp,ptr0);
    461:   for (i=1; i<n; i++) {
    462:     ptr[i] = va_arg(Argp,void**);
    463:   }
    464:   va_end(Argp);
    465:   if (petscmalloccoalesce) {
    466:     for (i=0; i<n; i++) {       /* Find first nonempty allocation */
    467:       if (*ptr[i]) break;
    468:     }
    469:     while (--n > i) {
    470:       *ptr[n] = NULL;
    471:     }
    472:     (*PetscTrFree)(*ptr[n],lineno,function,filename);
    473:     *ptr[n] = NULL;
    474:   } else {
    475:     while (--n >= 0) {
    476:       (*PetscTrFree)(*ptr[n],lineno,function,filename);
    477:       *ptr[n] = NULL;
    478:     }
    479:   }
    480:   return(0);
    481: }