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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 17:54:12 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 17:54:12 +0000
commitb527294153be3b79563c82c66102adc0004736c0 (patch)
tree9b423a224848441885190b5ea7cf0feb23510c9d /servers/slapd/zn_malloc.c
parentInitial commit. (diff)
downloadopenldap-b527294153be3b79563c82c66102adc0004736c0.tar.xz
openldap-b527294153be3b79563c82c66102adc0004736c0.zip
Adding upstream version 2.6.7+dfsg.upstream/2.6.7+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'servers/slapd/zn_malloc.c')
-rw-r--r--servers/slapd/zn_malloc.c970
1 files changed, 970 insertions, 0 deletions
diff --git a/servers/slapd/zn_malloc.c b/servers/slapd/zn_malloc.c
new file mode 100644
index 0000000..e2cdc21
--- /dev/null
+++ b/servers/slapd/zn_malloc.c
@@ -0,0 +1,970 @@
+/* zn_malloc.c - zone-based malloc routines */
+/* $OpenLDAP$*/
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2022 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>.
+ */
+/* Portions Copyright 2004 IBM Corporation
+ * 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.
+ */
+/* ACKNOWLEDGEMENTS
+ * This work originally developed by Jong-Hyuk Choi for inclusion in
+ * OpenLDAP Software.
+ */
+
+#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);
+
+ ldap_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 );
+ Debug(LDAP_DEBUG_NONE,
+ "++> slap_zn_mem_create: deltasize=%d, zonesize=%d\n",
+ deltasize, zonesize );
+
+ 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;
+ ldap_avl_insert(&zh->zh_zonetree, zo, slap_zone_cmp, ldap_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 );
+
+ 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) );
+ 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 );
+ 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) );
+ 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,
+ "zn_malloc %lu: ch_malloc\n",
+ (long)size );
+ Debug(LDAP_DEBUG_NONE,
+ "slap_zn_malloc: returning 0x%x, 0x%x\n",
+ ptr, (int)ptr>>(zh->zh_zoneorder+1) );
+ 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;
+ ldap_avl_insert(&zh->zh_zonetree, zo, slap_zone_cmp, ldap_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 );
+
+ 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 = ldap_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 );
+ 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 );
+
+ if (zh) {
+ ldap_pvt_thread_mutex_lock( &zh->zh_mutex );
+ zoo = ldap_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 );
+ 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 );
+ 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" );
+ 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 );
+ 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 );
+ 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 );
+ 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" );
+ 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 );
+ 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 = ldap_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 );
+ }
+
+ ldap_pvt_thread_mutex_unlock( &zh->zh_mutex );
+ Debug(LDAP_DEBUG_NONE, "zone %d invalidate\n", idx );
+ 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 = ldap_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 = ldap_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 = ldap_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 = ldap_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 = ldap_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 */