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openldap/servers/slapd/zn_malloc.c

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/* zn_malloc.c - zone-based malloc routines */
/* $OpenLDAP$*/
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2003-2005 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* Copyright 2004 IBM Corporation
* All rights reserved.
* Redisribution and use in source and binary forms, with or without
* modification, are permitted only as authorizd by the OpenLADP
* Public License.
*/
/* ACKNOWLEDGEMENTS
* This work originally developed by Jong-Hyuk Choi
* 2004/12/09 jongchoi@OpenLDAP.org
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <sys/types.h>
#include <fcntl.h>
#include "slap.h"
#ifdef SLAP_ZONE_ALLOC
#include <sys/mman.h>
static int slap_zone_cmp(const void *v1, const void *v2);
void * slap_replenish_zopool(void *ctx);
static void
slap_zo_release(void *data)
{
struct zone_object *zo = (struct zone_object *)data;
ch_free( zo );
}
void
slap_zn_mem_destroy(
void *ctx
)
{
struct zone_heap *zh = ctx;
int pad = 2*sizeof(int)-1, pad_shift;
int order_start = -1, i, j;
struct zone_object *zo;
pad_shift = pad - 1;
do {
order_start++;
} while (pad_shift >>= 1);
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
for (i = 0; i < zh->zh_zoneorder - order_start + 1; i++) {
zo = LDAP_LIST_FIRST(&zh->zh_free[i]);
while (zo) {
struct zone_object *zo_tmp = zo;
zo = LDAP_LIST_NEXT(zo, zo_link);
LDAP_LIST_REMOVE(zo_tmp, zo_link);
LDAP_LIST_INSERT_HEAD(&zh->zh_zopool, zo_tmp, zo_link);
}
}
ch_free(zh->zh_free);
for (i = 0; i < zh->zh_numzones; i++) {
for (j = 0; j < zh->zh_zoneorder - order_start + 1; j++) {
ch_free(zh->zh_maps[i][j]);
}
ch_free(zh->zh_maps[i]);
munmap(zh->zh_zones[i], zh->zh_zonesize);
ldap_pvt_thread_rdwr_destroy(&zh->zh_znlock[i]);
}
ch_free(zh->zh_maps);
ch_free(zh->zh_zones);
ch_free(zh->zh_seqno);
ch_free(zh->zh_znlock);
avl_free(zh->zh_zonetree, slap_zo_release);
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
while (zo) {
struct zone_object *zo_tmp = zo;
zo = LDAP_LIST_NEXT(zo, zo_link);
if (!zo_tmp->zo_blockhead) {
LDAP_LIST_REMOVE(zo_tmp, zo_link);
}
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
while (zo) {
struct zone_object *zo_tmp = zo;
zo = LDAP_LIST_NEXT(zo, zo_link);
ch_free(zo_tmp);
}
ldap_pvt_thread_mutex_unlock(&zh->zh_mutex);
ldap_pvt_thread_rdwr_destroy(&zh->zh_lock);
ldap_pvt_thread_mutex_destroy(&zh->zh_mutex);
ch_free(zh);
}
void *
slap_zn_mem_create(
ber_len_t initsize,
ber_len_t maxsize,
ber_len_t deltasize,
ber_len_t zonesize
)
{
struct zone_heap *zh = NULL;
ber_len_t zpad;
int pad = 2*sizeof(int)-1, pad_shift;
int size_shift;
int order = -1, order_start = -1, order_end = -1;
int i, j;
struct zone_object *zo;
Debug(LDAP_DEBUG_NONE,
"--> slap_zn_mem_create: initsize=%d, maxsize=%d\n",
initsize, maxsize, 0);
Debug(LDAP_DEBUG_NONE,
"++> slap_zn_mem_create: deltasize=%d, zonesize=%d\n",
deltasize, zonesize, 0);
zh = (struct zone_heap *)ch_calloc(1, sizeof(struct zone_heap));
zh->zh_fd = open("/dev/zero", O_RDWR);
if ( zonesize ) {
zh->zh_zonesize = zonesize;
} else {
zh->zh_zonesize = SLAP_ZONE_SIZE;
}
zpad = zh->zh_zonesize - 1;
zh->zh_numzones = ((initsize + zpad) & ~zpad) / zh->zh_zonesize;
if ( maxsize && maxsize >= initsize ) {
zh->zh_maxzones = ((maxsize + zpad) & ~zpad) / zh->zh_zonesize;
} else {
zh->zh_maxzones = ((initsize + zpad) & ~zpad) / zh->zh_zonesize;
}
if ( deltasize ) {
zh->zh_deltazones = ((deltasize + zpad) & ~zpad) / zh->zh_zonesize;
} else {
zh->zh_deltazones = ((SLAP_ZONE_DELTA+zpad) & ~zpad) / zh->zh_zonesize;
}
size_shift = zh->zh_zonesize - 1;
do {
order_end++;
} while (size_shift >>= 1);
pad_shift = pad - 1;
do {
order_start++;
} while (pad_shift >>= 1);
order = order_end - order_start + 1;
zh->zh_zones = (void **)ch_malloc(zh->zh_maxzones * sizeof(void*));
zh->zh_znlock = (ldap_pvt_thread_rdwr_t *)ch_malloc(
zh->zh_maxzones * sizeof(ldap_pvt_thread_rdwr_t *));
zh->zh_maps = (unsigned char ***)ch_malloc(
zh->zh_maxzones * sizeof(unsigned char**));
zh->zh_zoneorder = order_end;
zh->zh_free = (struct zh_freelist *)
ch_malloc(order * sizeof(struct zh_freelist));
zh->zh_seqno = (unsigned long *)ch_calloc(zh->zh_maxzones,
sizeof(unsigned long));
for (i = 0; i < order; i++) {
LDAP_LIST_INIT(&zh->zh_free[i]);
}
LDAP_LIST_INIT(&zh->zh_zopool);
for (i = 0; i < zh->zh_numzones; i++) {
zh->zh_zones[i] = mmap(0, zh->zh_zonesize, PROT_READ | PROT_WRITE,
MAP_PRIVATE, zh->zh_fd, 0);
zh->zh_maps[i] = (unsigned char **)
ch_malloc(order * sizeof(unsigned char *));
for (j = 0; j < order; j++) {
int shiftamt = order_start + 1 + j;
int nummaps = zh->zh_zonesize >> shiftamt;
assert(nummaps);
nummaps >>= 3;
if (!nummaps) nummaps = 1;
zh->zh_maps[i][j] = (unsigned char *)ch_malloc(nummaps);
memset(zh->zh_maps[i][j], 0, nummaps);
}
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = zh->zh_zones[i];
zo->zo_idx = i;
LDAP_LIST_INSERT_HEAD(&zh->zh_free[order-1], zo, zo_link);
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = zh->zh_zones[i];
zo->zo_siz = zh->zh_zonesize;
zo->zo_idx = i;
avl_insert(&zh->zh_zonetree, zo, slap_zone_cmp, avl_dup_error);
ldap_pvt_thread_rdwr_init(&zh->zh_znlock[i]);
}
LDAP_STAILQ_INIT(&zh->zh_latency_history_queue);
ldap_pvt_thread_mutex_init(&zh->zh_mutex);
ldap_pvt_thread_rdwr_init(&zh->zh_lock);
return zh;
}
void *
slap_zn_malloc(
ber_len_t size,
void *ctx
)
{
struct zone_heap *zh = ctx;
ber_len_t size_shift;
int pad = 2*sizeof(int)-1, pad_shift;
int order = -1, order_start = -1;
struct zone_object *zo, *zo_new, *zo_left, *zo_right;
ber_len_t *ptr, *new;
int idx;
unsigned long diff;
int i, j, k;
Debug(LDAP_DEBUG_NONE,
"--> slap_zn_malloc: size=%d\n", size, 0, 0);
if (!zh) return ber_memalloc_x(size, NULL);
/* round up to doubleword boundary */
size += 2*sizeof(ber_len_t) + pad;
size &= ~pad;
size_shift = size - 1;
do {
order++;
} while (size_shift >>= 1);
pad_shift = pad - 1;
do {
order_start++;
} while (pad_shift >>= 1);
retry:
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
for (i = order; i <= zh->zh_zoneorder &&
LDAP_LIST_EMPTY(&zh->zh_free[i-order_start]); i++);
if (i == order) {
zo_new = LDAP_LIST_FIRST(&zh->zh_free[i-order_start]);
LDAP_LIST_REMOVE(zo_new, zo_link);
ptr = zo_new->zo_ptr;
idx = zo_new->zo_idx;
diff = (unsigned long)((char*)ptr -
(char*)zh->zh_zones[idx]) >> (order + 1);
zh->zh_maps[idx][order-order_start][diff>>3] |= (1 << (diff & 0x7));
*ptr++ = zh->zh_seqno[idx];
*ptr++ = size - 2*sizeof(ber_len_t);
zo_new->zo_ptr = NULL;
zo_new->zo_idx = -1;
LDAP_LIST_INSERT_HEAD(&zh->zh_zopool, zo_new, zo_link);
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
Debug(LDAP_DEBUG_NONE, "slap_zn_malloc: returning 0x%x, 0x%x\n",
ptr, (int)ptr>>(zh->zh_zoneorder+1), 0);
return((void*)ptr);
} else if (i <= zh->zh_zoneorder) {
for (j = i; j > order; j--) {
zo_left = LDAP_LIST_FIRST(&zh->zh_free[j-order_start]);
LDAP_LIST_REMOVE(zo_left, zo_link);
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo_right = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo_right, zo_link);
zo_right->zo_ptr = zo_left->zo_ptr + (1 << j);
zo_right->zo_idx = zo_left->zo_idx;
Debug(LDAP_DEBUG_NONE,
"slap_zn_malloc: split (left=0x%x, right=0x%x)\n",
zo_left->zo_ptr, zo_right->zo_ptr, 0);
if (j == order + 1) {
ptr = zo_left->zo_ptr;
diff = (unsigned long)((char*)ptr -
(char*)zh->zh_zones[zo_left->zo_idx]) >> (order+1);
zh->zh_maps[zo_left->zo_idx][order-order_start][diff>>3] |=
(1 << (diff & 0x7));
*ptr++ = zh->zh_seqno[zo_left->zo_idx];
*ptr++ = size - 2*sizeof(ber_len_t);
LDAP_LIST_INSERT_HEAD(
&zh->zh_free[j-1-order_start], zo_right, zo_link);
LDAP_LIST_INSERT_HEAD(&zh->zh_zopool, zo_left, zo_link);
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
Debug(LDAP_DEBUG_NONE,
"slap_zn_malloc: returning 0x%x, 0x%x\n",
ptr, (int)ptr>>(zh->zh_zoneorder+1), 0);
return((void*)ptr);
} else {
LDAP_LIST_INSERT_HEAD(
&zh->zh_free[j-1-order_start], zo_right, zo_link);
LDAP_LIST_INSERT_HEAD(
&zh->zh_free[j-1-order_start], zo_left, zo_link);
}
}
assert(0);
} else {
if ( zh->zh_maxzones < zh->zh_numzones + zh->zh_deltazones ) {
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
Debug( LDAP_DEBUG_TRACE,
"slap_zn_malloc of %lu bytes failed, using ch_malloc\n",
(long)size, 0, 0);
Debug(LDAP_DEBUG_NONE,
"slap_zn_malloc: returning 0x%x, 0x%x\n",
ptr, (int)ptr>>(zh->zh_zoneorder+1), 0);
return (void*)ch_malloc(size);
}
for (i = zh->zh_numzones; i < zh->zh_numzones+zh->zh_deltazones; i++) {
zh->zh_zones[i] = mmap(0, zh->zh_zonesize, PROT_READ | PROT_WRITE,
MAP_PRIVATE, zh->zh_fd, 0);
zh->zh_maps[i] = (unsigned char **)
ch_malloc((zh->zh_zoneorder - order_start + 1) *
sizeof(unsigned char *));
for (j = 0; j < zh->zh_zoneorder-order_start+1; j++) {
int shiftamt = order_start + 1 + j;
int nummaps = zh->zh_zonesize >> shiftamt;
assert(nummaps);
nummaps >>= 3;
if (!nummaps) nummaps = 1;
zh->zh_maps[i][j] = (unsigned char *)ch_malloc(nummaps);
memset(zh->zh_maps[i][j], 0, nummaps);
}
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = zh->zh_zones[i];
zo->zo_idx = i;
LDAP_LIST_INSERT_HEAD(&zh->
zh_free[zh->zh_zoneorder-order_start],zo,zo_link);
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = zh->zh_zones[i];
zo->zo_siz = zh->zh_zonesize;
zo->zo_idx = i;
avl_insert(&zh->zh_zonetree, zo, slap_zone_cmp, avl_dup_error);
ldap_pvt_thread_rdwr_init(&zh->zh_znlock[i]);
}
zh->zh_numzones += zh->zh_deltazones;
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
goto retry;
}
}
void *
slap_zn_calloc( ber_len_t n, ber_len_t size, void *ctx )
{
void *new;
new = slap_zn_malloc( n*size, ctx );
if ( new ) {
memset( new, 0, n*size );
}
return new;
}
void *
slap_zn_realloc(void *ptr, ber_len_t size, void *ctx)
{
struct zone_heap *zh = ctx;
int pad = 2*sizeof(int)-1, pad_shift;
int order_start = -1, order = -1;
struct zone_object zoi, *zoo;
ber_len_t *p = (ber_len_t *)ptr, *new;
unsigned long diff;
int i;
void *newptr = NULL;
struct zone_heap *zone = NULL;
Debug(LDAP_DEBUG_NONE,
"--> slap_zn_realloc: ptr=0x%x, size=%d\n", ptr, size, 0);
if (ptr == NULL)
return slap_zn_malloc(size, zh);
zoi.zo_ptr = p;
zoi.zo_idx = -1;
if (zh) {
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
zoo = avl_find(zh->zh_zonetree, &zoi, slap_zone_cmp);
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
}
/* Not our memory? */
if (!zoo) {
/* duplicate of realloc behavior, oh well */
new = ber_memrealloc_x(ptr, size, NULL);
if (new) {
return new;
}
Debug(LDAP_DEBUG_ANY, "ch_realloc of %lu bytes failed\n",
(long) size, 0, 0);
assert(0);
exit( EXIT_FAILURE );
}
assert(zoo->zo_idx != -1);
zone = zh->zh_zones[zoo->zo_idx];
if (size == 0) {
slap_zn_free(ptr, zh);
return NULL;
}
newptr = slap_zn_malloc(size, zh);
if (size < p[-1]) {
AC_MEMCPY(newptr, ptr, size);
} else {
AC_MEMCPY(newptr, ptr, p[-1]);
}
slap_zn_free(ptr, zh);
return newptr;
}
void
slap_zn_free(void *ptr, void *ctx)
{
struct zone_heap *zh = ctx;
int size, size_shift, order_size;
int pad = 2*sizeof(int)-1, pad_shift;
ber_len_t *p = (ber_len_t *)ptr, *tmpp;
int order_start = -1, order = -1;
struct zone_object zoi, *zoo, *zo;
unsigned long diff;
int i, k, inserted = 0, idx;
struct zone_heap *zone = NULL;
zoi.zo_ptr = p;
zoi.zo_idx = -1;
Debug(LDAP_DEBUG_NONE, "--> slap_zn_free: ptr=0x%x\n", ptr, 0, 0);
if (zh) {
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
zoo = avl_find(zh->zh_zonetree, &zoi, slap_zone_cmp);
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
}
if (!zoo) {
ber_memfree_x(ptr, NULL);
} else {
idx = zoo->zo_idx;
assert(idx != -1);
zone = zh->zh_zones[idx];
size = *(--p);
size_shift = size + 2*sizeof(ber_len_t) - 1;
do {
order++;
} while (size_shift >>= 1);
pad_shift = pad - 1;
do {
order_start++;
} while (pad_shift >>= 1);
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
for (i = order, tmpp = p; i <= zh->zh_zoneorder; i++) {
order_size = 1 << (i+1);
diff = (unsigned long)((char*)tmpp - (char*)zone) >> (i+1);
zh->zh_maps[idx][i-order_start][diff>>3] &= (~(1 << (diff & 0x7)));
if (diff == ((diff>>1)<<1)) {
if (!(zh->zh_maps[idx][i-order_start][(diff+1)>>3] &
(1<<((diff+1)&0x7)))) {
zo = LDAP_LIST_FIRST(&zh->zh_free[i-order_start]);
while (zo) {
if ((char*)zo->zo_ptr == (char*)tmpp) {
LDAP_LIST_REMOVE( zo, zo_link );
} else if ((char*)zo->zo_ptr ==
(char*)tmpp + order_size) {
LDAP_LIST_REMOVE(zo, zo_link);
break;
}
zo = LDAP_LIST_NEXT(zo, zo_link);
}
if (zo) {
if (i < zh->zh_zoneorder) {
inserted = 1;
zo->zo_ptr = tmpp;
Debug(LDAP_DEBUG_NONE,
"slap_zn_free: merging 0x%x\n",
zo->zo_ptr, 0, 0);
LDAP_LIST_INSERT_HEAD(&zh->zh_free[i-order_start+1],
zo, zo_link);
}
continue;
} else {
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = tmpp;
zo->zo_idx = idx;
Debug(LDAP_DEBUG_NONE,
"slap_zn_free: merging 0x%x\n",
zo->zo_ptr, 0, 0);
LDAP_LIST_INSERT_HEAD(&zh->zh_free[i-order_start],
zo, zo_link);
break;
Debug(LDAP_DEBUG_ANY, "slap_zn_free: "
"free object not found while bit is clear.\n",
0, 0, 0);
assert(zo != NULL);
}
} else {
if (!inserted) {
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = tmpp;
zo->zo_idx = idx;
Debug(LDAP_DEBUG_NONE,
"slap_zn_free: merging 0x%x\n",
zo->zo_ptr, 0, 0);
LDAP_LIST_INSERT_HEAD(&zh->zh_free[i-order_start],
zo, zo_link);
}
break;
}
} else {
if (!(zh->zh_maps[idx][i-order_start][(diff-1)>>3] &
(1<<((diff-1)&0x7)))) {
zo = LDAP_LIST_FIRST(&zh->zh_free[i-order_start]);
while (zo) {
if ((char*)zo->zo_ptr == (char*)tmpp) {
LDAP_LIST_REMOVE(zo, zo_link);
} else if ((char*)tmpp == zo->zo_ptr + order_size) {
LDAP_LIST_REMOVE(zo, zo_link);
tmpp = zo->zo_ptr;
break;
}
zo = LDAP_LIST_NEXT(zo, zo_link);
}
if (zo) {
if (i < zh->zh_zoneorder) {
inserted = 1;
Debug(LDAP_DEBUG_NONE,
"slap_zn_free: merging 0x%x\n",
zo->zo_ptr, 0, 0);
LDAP_LIST_INSERT_HEAD(&zh->zh_free[i-order_start+1],
zo, zo_link);
continue;
}
} else {
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = tmpp;
zo->zo_idx = idx;
Debug(LDAP_DEBUG_NONE,
"slap_zn_free: merging 0x%x\n",
zo->zo_ptr, 0, 0);
LDAP_LIST_INSERT_HEAD(&zh->zh_free[i-order_start],
zo, zo_link);
break;
Debug(LDAP_DEBUG_ANY, "slap_zn_free: "
"free object not found while bit is clear.\n",
0, 0, 0 );
assert(zo != NULL);
}
} else {
if ( !inserted ) {
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = tmpp;
zo->zo_idx = idx;
Debug(LDAP_DEBUG_NONE,
"slap_zn_free: merging 0x%x\n",
zo->zo_ptr, 0, 0);
LDAP_LIST_INSERT_HEAD(&zh->zh_free[i-order_start],
zo, zo_link);
}
break;
}
}
}
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
}
}
static int
slap_zone_cmp(const void *v1, const void *v2)
{
const struct zone_object *zo1 = v1;
const struct zone_object *zo2 = v2;
char *ptr1;
char *ptr2;
ber_len_t zpad;
zpad = zo2->zo_siz - 1;
ptr1 = (char*)(((unsigned long)zo1->zo_ptr + zpad) & ~zpad);
ptr2 = (char*)zo2->zo_ptr + ((char*)ptr1 - (char*)zo1->zo_ptr);
ptr2 = (char*)(((unsigned long)ptr2 + zpad) & ~zpad);
return (int)((char*)ptr1 - (char*)ptr2);
}
void *
slap_replenish_zopool(
void *ctx
)
{
struct zone_heap* zh = ctx;
struct zone_object *zo_block;
int i;
zo_block = (struct zone_object *)ch_malloc(
SLAP_ZONE_ZOBLOCK * sizeof(struct zone_object));
if ( zo_block == NULL ) {
return NULL;
}
zo_block[0].zo_blockhead = 1;
LDAP_LIST_INSERT_HEAD(&zh->zh_zopool, &zo_block[0], zo_link);
for (i = 1; i < SLAP_ZONE_ZOBLOCK; i++) {
zo_block[i].zo_blockhead = 0;
LDAP_LIST_INSERT_HEAD(&zh->zh_zopool, &zo_block[i], zo_link );
}
return zo_block;
}
int
slap_zn_invalidate(
void *ctx,
void *ptr
)
{
struct zone_heap* zh = ctx;
struct zone_object zoi, *zoo;
struct zone_heap *zone = NULL;
int seqno = *((ber_len_t*)ptr - 2);
int idx = -1, rc = 0;
int pad = 2*sizeof(int)-1, pad_shift;
int order_start = -1, i;
struct zone_object *zo;
pad_shift = pad - 1;
do {
order_start++;
} while (pad_shift >>= 1);
zoi.zo_ptr = ptr;
zoi.zo_idx = -1;
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
zoo = avl_find(zh->zh_zonetree, &zoi, slap_zone_cmp);
if (zoo) {
idx = zoo->zo_idx;
assert(idx != -1);
madvise(zh->zh_zones[idx], zh->zh_zonesize, MADV_DONTNEED);
for (i = 0; i < zh->zh_zoneorder - order_start + 1; i++) {
int shiftamt = order_start + 1 + i;
int nummaps = zh->zh_zonesize >> shiftamt;
assert(nummaps);
nummaps >>= 3;
if (!nummaps) nummaps = 1;
memset(zh->zh_maps[idx][i], 0, nummaps);
zo = LDAP_LIST_FIRST(&zh->zh_free[i]);
while (zo) {
struct zone_object *zo_tmp = zo;
zo = LDAP_LIST_NEXT(zo, zo_link);
if (zo_tmp && zo_tmp->zo_idx == idx) {
LDAP_LIST_REMOVE(zo_tmp, zo_link);
LDAP_LIST_INSERT_HEAD(&zh->zh_zopool, zo_tmp, zo_link);
}
}
}
if (LDAP_LIST_EMPTY(&zh->zh_zopool)) {
slap_replenish_zopool(zh);
}
zo = LDAP_LIST_FIRST(&zh->zh_zopool);
LDAP_LIST_REMOVE(zo, zo_link);
zo->zo_ptr = zh->zh_zones[idx];
zo->zo_idx = idx;
LDAP_LIST_INSERT_HEAD(&zh->zh_free[zh->zh_zoneorder-order_start],
zo, zo_link);
zh->zh_seqno[idx]++;
} else {
Debug(LDAP_DEBUG_NONE, "zone not found for (ctx=0x%x, ptr=0x%x) !\n",
ctx, ptr, 0);
}
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
Debug(LDAP_DEBUG_NONE, "zone %d invalidate\n", idx, 0, 0);
return rc;
}
int
slap_zn_validate(
void *ctx,
void *ptr,
int seqno
)
{
struct zone_heap* zh = ctx;
struct zone_object zoi, *zoo;
struct zone_heap *zone = NULL;
int idx, rc = 0;
zoi.zo_ptr = ptr;
zoi.zo_idx = -1;
zoo = avl_find(zh->zh_zonetree, &zoi, slap_zone_cmp);
if (zoo) {
idx = zoo->zo_idx;
assert(idx != -1);
assert(seqno <= zh->zh_seqno[idx]);
rc = (seqno == zh->zh_seqno[idx]);
}
return rc;
}
int slap_zh_rlock(
void *ctx
)
{
struct zone_heap* zh = ctx;
ldap_pvt_thread_rdwr_rlock(&zh->zh_lock);
}
int slap_zh_runlock(
void *ctx
)
{
struct zone_heap* zh = ctx;
ldap_pvt_thread_rdwr_runlock(&zh->zh_lock);
}
int slap_zh_wlock(
void *ctx
)
{
struct zone_heap* zh = ctx;
ldap_pvt_thread_rdwr_wlock(&zh->zh_lock);
}
int slap_zh_wunlock(
void *ctx
)
{
struct zone_heap* zh = ctx;
ldap_pvt_thread_rdwr_wunlock(&zh->zh_lock);
}
int slap_zn_rlock(
void *ctx,
void *ptr
)
{
struct zone_heap* zh = ctx;
struct zone_object zoi, *zoo;
struct zone_heap *zone = NULL;
int idx;
zoi.zo_ptr = ptr;
zoi.zo_idx = -1;
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
zoo = avl_find(zh->zh_zonetree, &zoi, slap_zone_cmp);
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
if (zoo) {
idx = zoo->zo_idx;
assert(idx != -1);
ldap_pvt_thread_rdwr_rlock(&zh->zh_znlock[idx]);
}
}
int slap_zn_runlock(
void *ctx,
void *ptr
)
{
struct zone_heap* zh = ctx;
struct zone_object zoi, *zoo;
struct zone_heap *zone = NULL;
int idx;
zoi.zo_ptr = ptr;
zoi.zo_idx = -1;
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
zoo = avl_find(zh->zh_zonetree, &zoi, slap_zone_cmp);
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
if (zoo) {
idx = zoo->zo_idx;
assert(idx != -1);
ldap_pvt_thread_rdwr_runlock(&zh->zh_znlock[idx]);
}
}
int slap_zn_wlock(
void *ctx,
void *ptr
)
{
struct zone_heap* zh = ctx;
struct zone_object zoi, *zoo;
struct zone_heap *zone = NULL;
int idx;
zoi.zo_ptr = ptr;
zoi.zo_idx = -1;
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
zoo = avl_find(zh->zh_zonetree, &zoi, slap_zone_cmp);
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
if (zoo) {
idx = zoo->zo_idx;
assert(idx != -1);
ldap_pvt_thread_rdwr_wlock(&zh->zh_znlock[idx]);
}
}
int slap_zn_wunlock(
void *ctx,
void *ptr
)
{
struct zone_heap* zh = ctx;
struct zone_object zoi, *zoo;
struct zone_heap *zone = NULL;
int idx;
zoi.zo_ptr = ptr;
zoi.zo_idx = -1;
ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
zoo = avl_find(zh->zh_zonetree, &zoi, slap_zone_cmp);
ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
if (zoo) {
idx = zoo->zo_idx;
assert(idx != -1);
ldap_pvt_thread_rdwr_wunlock(&zh->zh_znlock[idx]);
}
}
#define T_SEC_IN_USEC 1000000
static int
slap_timediff(struct timeval *tv_begin, struct timeval *tv_end)
{
uint64_t t_begin, t_end, t_diff;
t_begin = T_SEC_IN_USEC * tv_begin->tv_sec + tv_begin->tv_usec;
t_end = T_SEC_IN_USEC * tv_end->tv_sec + tv_end->tv_usec;
t_diff = t_end - t_begin;
if ( t_diff < 0 )
t_diff = 0;
return (int)t_diff;
}
void
slap_set_timing(struct timeval *tv_set)
{
gettimeofday(tv_set, (struct timezone *)NULL);
}
int
slap_measure_timing(struct timeval *tv_set, struct timeval *tv_measure)
{
gettimeofday(tv_measure, (struct timezone *)NULL);
return(slap_timediff(tv_set, tv_measure));
}
#define EMA_WEIGHT 0.999000
#define SLAP_ZN_LATENCY_HISTORY_QLEN 500
int
slap_zn_latency_history(void* ctx, int ea_latency)
{
/* TODO: monitor /proc/stat (swap) as well */
struct zone_heap* zh = ctx;
double t_diff = 0.0;
zh->zh_ema_latency = (double)ea_latency * (1.0 - EMA_WEIGHT)
+ zh->zh_ema_latency * EMA_WEIGHT;
if (!zh->zh_swapping && zh->zh_ema_samples++ % 100 == 99) {
struct zone_latency_history *zlh_entry;
zlh_entry = ch_calloc(1, sizeof(struct zone_latency_history));
zlh_entry->zlh_latency = zh->zh_ema_latency;
LDAP_STAILQ_INSERT_TAIL(
&zh->zh_latency_history_queue, zlh_entry, zlh_next);
zh->zh_latency_history_qlen++;
while (zh->zh_latency_history_qlen > SLAP_ZN_LATENCY_HISTORY_QLEN) {
struct zone_latency_history *zlh;
zlh = LDAP_STAILQ_FIRST(&zh->zh_latency_history_queue);
LDAP_STAILQ_REMOVE_HEAD(
&zh->zh_latency_history_queue, zlh_next);
zh->zh_latency_history_qlen--;
ch_free(zlh);
}
if (zh->zh_latency_history_qlen == SLAP_ZN_LATENCY_HISTORY_QLEN) {
struct zone_latency_history *zlh_first, *zlh_last;
zlh_first = LDAP_STAILQ_FIRST(&zh->zh_latency_history_queue);
zlh_last = LDAP_STAILQ_LAST(&zh->zh_latency_history_queue,
zone_latency_history, zlh_next);
t_diff = zlh_last->zlh_latency - zlh_first->zlh_latency;
}
if (t_diff >= 2000) {
zh->zh_latency_jump++;
} else {
zh->zh_latency_jump = 0;
}
if (zh->zh_latency_jump > 3) {
zh->zh_latency_jump = 0;
zh->zh_swapping = 1;
}
}
return zh->zh_swapping;
}
#endif /* SLAP_ZONE_ALLOC */
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