/*
* heap_resize_chunk -- (internal) splits the chunk into two smaller ones
*/
static void
heap_resize_chunk(struct palloc_heap *heap,
uint32_t chunk_id, uint32_t zone_id, uint32_t new_size_idx)
{
uint32_t new_chunk_id = chunk_id + new_size_idx;
struct zone *z = ZID_TO_ZONE(heap->layout, zone_id);
struct chunk_header *old_hdr = &z->chunk_headers[chunk_id];
struct chunk_header *new_hdr = &z->chunk_headers[new_chunk_id];
uint32_t rem_size_idx = old_hdr->size_idx - new_size_idx;
heap_chunk_init(heap, new_hdr, CHUNK_TYPE_FREE, rem_size_idx);
heap_chunk_init(heap, old_hdr, CHUNK_TYPE_FREE, new_size_idx);
struct bucket *def_bucket = heap->rt->default_bucket;
struct memory_block m = {new_chunk_id, zone_id, rem_size_idx, 0,
0, 0, NULL, NULL};
memblock_rebuild_state(heap, &m);
bucket_insert_block(def_bucket, &m);
}
/*
* heap_resize_chunk -- (internal) splits the chunk into two smaller ones
*/
static void
heap_resize_chunk(PMEMobjpool *pop,
uint32_t chunk_id, uint32_t zone_id, uint32_t new_size_idx)
{
uint32_t new_chunk_id = chunk_id + new_size_idx;
struct zone *z = &pop->heap->layout->zones[zone_id];
struct chunk_header *old_hdr = &z->chunk_headers[chunk_id];
struct chunk_header *new_hdr = &z->chunk_headers[new_chunk_id];
uint32_t rem_size_idx = old_hdr->size_idx - new_size_idx;
heap_chunk_init(pop, new_hdr, CHUNK_TYPE_FREE, rem_size_idx);
heap_chunk_init(pop, old_hdr, CHUNK_TYPE_FREE, new_size_idx);
struct bucket *def_bucket = pop->heap->buckets[DEFAULT_BUCKET];
struct memory_block m = {new_chunk_id, zone_id, rem_size_idx, 0};
if (bucket_insert_block(def_bucket, m) != 0) {
ERR("bucket_insert_block failed during resize");
}
}
/*
* heap_reclaim_run -- checks the run for available memory if unclaimed.
*
* Returns 1 if reclaimed chunk, 0 otherwise.
*/
static int
heap_reclaim_run(struct palloc_heap *heap, struct chunk_run *run,
struct memory_block *m)
{
if (m->m_ops->claim(m) != 0)
return 0; /* this run already has an owner */
struct alloc_class *c = alloc_class_get_create_by_unit_size(
heap->rt->alloc_classes, run->block_size);
if (c == NULL)
return 0;
ASSERTeq(c->type, CLASS_RUN);
pthread_mutex_t *lock = m->m_ops->get_lock(m);
util_mutex_lock(lock);
unsigned i;
unsigned nval = c->run.bitmap_nval;
for (i = 0; nval > 0 && i < nval - 1; ++i)
if (run->bitmap[i] != 0)
break;
int empty = (i == (nval - 1)) &&
(run->bitmap[i] == c->run.bitmap_lastval);
if (empty) {
struct zone *z = ZID_TO_ZONE(heap->layout, m->zone_id);
struct chunk_header *hdr = &z->chunk_headers[m->chunk_id];
struct bucket *defb = heap_get_default_bucket(heap);
/*
* The redo log ptr can be NULL if we are sure that there's only
* one persistent value modification in the entire operation
* context.
*/
struct operation_context ctx;
operation_init(&ctx, heap->base, NULL, NULL);
ctx.p_ops = &heap->p_ops;
struct memory_block nb = MEMORY_BLOCK_NONE;
nb.chunk_id = m->chunk_id;
nb.zone_id = m->zone_id;
nb.block_off = 0;
nb.size_idx = m->size_idx;
heap_chunk_init(heap, hdr, CHUNK_TYPE_FREE, nb.size_idx);
memblock_rebuild_state(heap, &nb);
nb = heap_coalesce_huge(heap, &nb);
nb.m_ops->prep_hdr(&nb, MEMBLOCK_FREE, &ctx);
operation_process(&ctx);
bucket_insert_block(defb, &nb);
*m = nb;
} else {
recycler_put(heap->rt->recyclers[c->id], m);
}
util_mutex_unlock(lock);
return empty;
}
/*
* heap_chunk_init -- (internal) writes chunk header
*/
static void
heap_chunk_init(struct palloc_heap *heap, struct chunk_header *hdr,
uint16_t type, uint32_t size_idx)
{
struct chunk_header nhdr = {
.type = type,
.flags = 0,
.size_idx = size_idx
};
VALGRIND_DO_MAKE_MEM_UNDEFINED(hdr, sizeof(*hdr));
*hdr = nhdr; /* write the entire header (8 bytes) at once */
pmemops_persist(&heap->p_ops, hdr, sizeof(*hdr));
heap_chunk_write_footer(hdr, size_idx);
}
/*
* heap_zone_init -- (internal) writes zone's first chunk and header
*/
static void
heap_zone_init(struct palloc_heap *heap, uint32_t zone_id)
{
struct zone *z = ZID_TO_ZONE(heap->layout, zone_id);
uint32_t size_idx = get_zone_size_idx(zone_id, heap->rt->max_zone,
heap->size);
heap_chunk_init(heap, &z->chunk_headers[0], CHUNK_TYPE_FREE, size_idx);
struct zone_header nhdr = {
.size_idx = size_idx,
.magic = ZONE_HEADER_MAGIC,
};
z->header = nhdr; /* write the entire header (8 bytes) at once */
pmemops_persist(&heap->p_ops, &z->header, sizeof(z->header));
}
/*
* heap_run_init -- (internal) creates a run based on a chunk
*/
static void
heap_run_init(struct palloc_heap *heap, struct bucket *b,
const struct memory_block *m)
{
struct alloc_class *c = b->aclass;
ASSERTeq(c->type, CLASS_RUN);
struct zone *z = ZID_TO_ZONE(heap->layout, m->zone_id);
struct chunk_run *run = (struct chunk_run *)&z->chunks[m->chunk_id];
ASSERTne(m->size_idx, 0);
size_t runsize = SIZEOF_RUN(run, m->size_idx);
VALGRIND_DO_MAKE_MEM_UNDEFINED(run, runsize);
/* add/remove chunk_run and chunk_header to valgrind transaction */
VALGRIND_ADD_TO_TX(run, runsize);
run->block_size = c->unit_size;
pmemops_persist(&heap->p_ops, &run->block_size,
sizeof(run->block_size));
/* set all the bits */
memset(run->bitmap, 0xFF, sizeof(run->bitmap));
unsigned nval = c->run.bitmap_nval;
ASSERT(nval > 0);
/* clear only the bits available for allocations from this bucket */
memset(run->bitmap, 0, sizeof(uint64_t) * (nval - 1));
run->bitmap[nval - 1] = c->run.bitmap_lastval;
run->incarnation_claim = heap->run_id;
VALGRIND_SET_CLEAN(&run->incarnation_claim,
sizeof(run->incarnation_claim));
VALGRIND_REMOVE_FROM_TX(run, runsize);
pmemops_persist(&heap->p_ops, run->bitmap, sizeof(run->bitmap));
struct chunk_header run_data_hdr;
run_data_hdr.type = CHUNK_TYPE_RUN_DATA;
run_data_hdr.flags = 0;
struct chunk_header *data_hdr;
for (unsigned i = 1; i < m->size_idx; ++i) {
data_hdr = &z->chunk_headers[m->chunk_id + i];
VALGRIND_DO_MAKE_MEM_UNDEFINED(data_hdr, sizeof(*data_hdr));
VALGRIND_ADD_TO_TX(data_hdr, sizeof(*data_hdr));
run_data_hdr.size_idx = i;
*data_hdr = run_data_hdr;
VALGRIND_REMOVE_FROM_TX(data_hdr, sizeof(*data_hdr));
}
pmemops_persist(&heap->p_ops,
&z->chunk_headers[m->chunk_id + 1],
sizeof(struct chunk_header) * (m->size_idx - 1));
struct chunk_header *hdr = &z->chunk_headers[m->chunk_id];
ASSERT(hdr->type == CHUNK_TYPE_FREE);
VALGRIND_ADD_TO_TX(hdr, sizeof(*hdr));
struct chunk_header run_hdr;
run_hdr.size_idx = hdr->size_idx;
run_hdr.type = CHUNK_TYPE_RUN;
run_hdr.flags = header_type_to_flag[c->header_type];
*hdr = run_hdr;
VALGRIND_REMOVE_FROM_TX(hdr, sizeof(*hdr));
pmemops_persist(&heap->p_ops, hdr, sizeof(*hdr));
}
/*
* heap_run_insert -- (internal) inserts and splits a block of memory into a run
*/
static void
heap_run_insert(struct palloc_heap *heap, struct bucket *b,
const struct memory_block *m, uint32_t size_idx, uint16_t block_off)
{
struct alloc_class *c = b->aclass;
ASSERTeq(c->type, CLASS_RUN);
ASSERT(size_idx <= BITS_PER_VALUE);
ASSERT(block_off + size_idx <= c->run.bitmap_nallocs);
uint32_t unit_max = c->run.unit_max;
struct memory_block nm = *m;
nm.size_idx = unit_max - (block_off % unit_max);
nm.block_off = block_off;
if (nm.size_idx > size_idx)
nm.size_idx = size_idx;
do {
bucket_insert_block(b, &nm);
ASSERT(nm.size_idx <= UINT16_MAX);
ASSERT(nm.block_off + nm.size_idx <= UINT16_MAX);
nm.block_off = (uint16_t)(nm.block_off + (uint16_t)nm.size_idx);
size_idx -= nm.size_idx;
nm.size_idx = size_idx > unit_max ? unit_max : size_idx;
} while (size_idx != 0);
}
/*
* heap_process_run_metadata -- (internal) parses the run bitmap
*/
static uint32_t
heap_process_run_metadata(struct palloc_heap *heap, struct bucket *b,
const struct memory_block *m)
{
struct alloc_class *c = b->aclass;
ASSERTeq(c->type, CLASS_RUN);
uint16_t block_off = 0;
uint16_t block_size_idx = 0;
uint32_t inserted_blocks = 0;
struct zone *z = ZID_TO_ZONE(heap->layout, m->zone_id);
struct chunk_run *run = (struct chunk_run *)&z->chunks[m->chunk_id];
for (unsigned i = 0; i < c->run.bitmap_nval; ++i) {
ASSERT(i < MAX_BITMAP_VALUES);
uint64_t v = run->bitmap[i];
ASSERT(BITS_PER_VALUE * i <= UINT16_MAX);
block_off = (uint16_t)(BITS_PER_VALUE * i);
if (v == 0) {
heap_run_insert(heap, b, m, BITS_PER_VALUE, block_off);
inserted_blocks += BITS_PER_VALUE;
continue;
} else if (v == UINT64_MAX) {
continue;
}
for (unsigned j = 0; j < BITS_PER_VALUE; ++j) {
if (BIT_IS_CLR(v, j)) {
block_size_idx++;
} else if (block_size_idx != 0) {
ASSERT(block_off >= block_size_idx);
heap_run_insert(heap, b, m,
block_size_idx,
(uint16_t)(block_off - block_size_idx));
inserted_blocks += block_size_idx;
block_size_idx = 0;
}
if ((block_off++) == c->run.bitmap_nallocs) {
i = MAX_BITMAP_VALUES;
break;
}
}
if (block_size_idx != 0) {
ASSERT(block_off >= block_size_idx);
heap_run_insert(heap, b, m,
block_size_idx,
(uint16_t)(block_off - block_size_idx));
inserted_blocks += block_size_idx;
block_size_idx = 0;
}
}
return inserted_blocks;
}
/*
* heap_create_run -- (internal) initializes a new run on an existing free chunk
*/
static void
heap_create_run(struct palloc_heap *heap, struct bucket *b,
struct memory_block *m)
{
heap_run_init(heap, b, m);
memblock_rebuild_state(heap, m);
heap_process_run_metadata(heap, b, m);
}
/*
* heap_degrade_run_if_empty -- makes a chunk out of an empty run
*/
int
heap_degrade_run_if_empty(PMEMobjpool *pop, struct bucket *b,
struct memory_block m)
{
struct zone *z = &pop->heap->layout->zones[m.zone_id];
struct chunk_header *hdr = &z->chunk_headers[m.chunk_id];
ASSERT(hdr->type == CHUNK_TYPE_RUN);
struct chunk_run *run = (struct chunk_run *)&z->chunks[m.chunk_id];
int err = 0;
if ((err = pthread_mutex_lock(heap_get_run_lock(pop, m))) != 0)
return err;
int i;
for (i = 0; i < bucket_bitmap_nval(b) - 1; ++i)
if (run->bitmap[i] != 0)
goto out;
if (run->bitmap[i] != bucket_bitmap_lastval(b))
goto out;
m.block_off = 0;
m.size_idx = RUN_UNIT_MAX;
uint32_t size_idx_sum = 0;
while (size_idx_sum != bucket_bitmap_nallocs(b)) {
if (bucket_get_rm_block_exact(b, m) != 0) {
ERR("persistent and volatile state mismatched");
ASSERT(0);
}
size_idx_sum += m.size_idx;
m.block_off += RUN_UNIT_MAX;
if (m.block_off + RUN_UNIT_MAX > bucket_bitmap_nallocs(b))
m.size_idx = bucket_bitmap_nallocs(b) - m.block_off;
else
m.size_idx = RUN_UNIT_MAX;
}
struct bucket *defb = pop->heap->buckets[DEFAULT_BUCKET];
if ((err = bucket_lock(defb)) != 0) {
ERR("Failed to lock default bucket");
ASSERT(0);
}
m.block_off = 0;
m.size_idx = 1;
heap_chunk_init(pop, hdr, CHUNK_TYPE_FREE, m.size_idx);
uint64_t *mhdr;
uint64_t op_result;
struct memory_block fm =
heap_free_block(pop, defb, m, &mhdr, &op_result);
VALGRIND_ADD_TO_TX(mhdr, sizeof (*mhdr));
*mhdr = op_result;
VALGRIND_REMOVE_FROM_TX(mhdr, sizeof (*mhdr));
pop->persist(mhdr, sizeof (*mhdr));
if ((err = bucket_insert_block(defb, fm)) != 0) {
ERR("Failed to update heap volatile state");
}
bucket_unlock(defb);
out:
if (pthread_mutex_unlock(heap_get_run_lock(pop, m)) != 0) {
ERR("Failed to release run lock");
ASSERT(0);
}
return err;
}
/*
* heap_chunk_init -- (internal) writes chunk header
*/
static void
heap_chunk_init(PMEMobjpool *pop, struct chunk_header *hdr,
uint16_t type, uint32_t size_idx)
{
struct chunk_header nhdr = {
.type = type,
.flags = 0,
.size_idx = size_idx
};
*hdr = nhdr; /* write the entire header (8 bytes) at once */
pop->persist(hdr, sizeof (*hdr));
heap_chunk_write_footer(hdr, size_idx);
}
/*
* heap_zone_init -- (internal) writes zone's first chunk and header
*/
static void
heap_zone_init(PMEMobjpool *pop, uint32_t zone_id)
{
struct zone *z = &pop->heap->layout->zones[zone_id];
uint32_t size_idx = get_zone_size_idx(zone_id, pop->heap->max_zone,
pop->heap_size);
heap_chunk_init(pop, &z->chunk_headers[0], CHUNK_TYPE_FREE, size_idx);
struct zone_header nhdr = {
.size_idx = size_idx,
.magic = ZONE_HEADER_MAGIC,
};
z->header = nhdr; /* write the entire header (8 bytes) at once */
pop->persist(&z->header, sizeof (z->header));
}
/*
* heap_init_run -- (internal) creates a run based on a chunk
*/
static void
heap_init_run(PMEMobjpool *pop, struct bucket *b, struct chunk_header *hdr,
struct chunk_run *run)
{
/* add/remove chunk_run and chunk_header to valgrind transaction */
VALGRIND_ADD_TO_TX(run, sizeof (*run));
run->block_size = bucket_unit_size(b);
pop->persist(&run->block_size, sizeof (run->block_size));
ASSERT(hdr->type == CHUNK_TYPE_FREE);
/* set all the bits */
memset(run->bitmap, 0xFF, sizeof (run->bitmap));
/* clear only the bits available for allocations from this bucket */
memset(run->bitmap, 0, sizeof (uint64_t) * (bucket_bitmap_nval(b) - 1));
run->bitmap[bucket_bitmap_nval(b) - 1] = bucket_bitmap_lastval(b);
VALGRIND_REMOVE_FROM_TX(run, sizeof (*run));
pop->persist(run->bitmap, sizeof (run->bitmap));
VALGRIND_ADD_TO_TX(hdr, sizeof (*hdr));
hdr->type = CHUNK_TYPE_RUN;
VALGRIND_REMOVE_FROM_TX(hdr, sizeof (*hdr));
pop->persist(hdr, sizeof (*hdr));
}
