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-rw-r--r--ggml-alloc.c1041
1 files changed, 0 insertions, 1041 deletions
diff --git a/ggml-alloc.c b/ggml-alloc.c
deleted file mode 100644
index bd367c42..00000000
--- a/ggml-alloc.c
+++ /dev/null
@@ -1,1041 +0,0 @@
-#include "ggml-alloc.h"
-#include "ggml-backend-impl.h"
-#include "ggml.h"
-#include "ggml-impl.h"
-#include <assert.h>
-#include <limits.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
-#define MAX_FREE_BLOCKS 256
-
-//#define GGML_ALLOCATOR_DEBUG
-
-//#define AT_PRINTF(...) fprintf(stderr, __VA_ARGS__)
-#define AT_PRINTF(...)
-
-
-static bool ggml_is_view(const struct ggml_tensor * t) {
- return t->view_src != NULL;
-}
-
-static bool ggml_are_same_layout(const struct ggml_tensor * a, const struct ggml_tensor * b) {
- if (a->type != b->type) {
- return false;
- }
- for (int i = 0; i < GGML_MAX_DIMS; i++) {
- if (a->ne[i] != b->ne[i]) {
- return false;
- }
- if (a->nb[i] != b->nb[i]) {
- return false;
- }
- }
- return true;
-}
-
-static bool ggml_op_can_inplace(enum ggml_op op) {
- switch (op) {
- case GGML_OP_SCALE:
- case GGML_OP_DIAG_MASK_ZERO:
- case GGML_OP_DIAG_MASK_INF:
- case GGML_OP_ADD:
- case GGML_OP_ADD1:
- case GGML_OP_SUB:
- case GGML_OP_MUL:
- case GGML_OP_DIV:
- case GGML_OP_SQR:
- case GGML_OP_SQRT:
- case GGML_OP_LOG:
- case GGML_OP_UNARY:
- case GGML_OP_ROPE:
- case GGML_OP_RMS_NORM:
- case GGML_OP_SOFT_MAX:
- return true;
-
- default:
- return false;
- }
-}
-
-static size_t aligned_offset(const void * buffer, size_t offset, size_t alignment) {
- assert(alignment && !(alignment & (alignment - 1))); // power of 2
- size_t align = (alignment - (((uintptr_t)buffer + offset) % alignment)) % alignment;
- return offset + align;
-}
-
-// tallocr
-
-struct ggml_tallocr ggml_tallocr_new(ggml_backend_buffer_t buffer) {
- void * base = ggml_backend_buffer_get_base(buffer);
- size_t align = ggml_backend_buffer_get_alignment(buffer);
-
- assert(align && !(align & (align - 1))); // power of 2
-
- struct ggml_tallocr talloc = (struct ggml_tallocr) {
- /*.buffer = */ buffer,
- /*.base = */ base,
- /*.alignment = */ align,
- /*.offset = */ aligned_offset(base, 0, align),
- };
- return talloc;
-}
-
-void ggml_tallocr_alloc(struct ggml_tallocr * talloc, struct ggml_tensor * tensor) {
- size_t size = ggml_backend_buffer_get_alloc_size(talloc->buffer, tensor);
- size = GGML_PAD(size, talloc->alignment);
-
- if (talloc->offset + size > ggml_backend_buffer_get_size(talloc->buffer)) {
- fprintf(stderr, "%s: not enough space in the buffer to allocate %s (needed %zu, available %zu)\n",
- __func__, tensor->name, size, ggml_backend_buffer_get_size(talloc->buffer) - talloc->offset);
- GGML_ASSERT(!"not enough space in the buffer");
- return;
- }
-
- void * addr = (char *)ggml_backend_buffer_get_base(talloc->buffer) + talloc->offset;
- talloc->offset += size;
-
- assert(((uintptr_t)addr % talloc->alignment) == 0);
-
- ggml_backend_tensor_alloc(talloc->buffer, tensor, addr);
-}
-
-// dynamic tensor allocator
-
-struct free_block {
- size_t offset;
- size_t size;
-};
-
-struct ggml_dyn_tallocr {
- size_t alignment;
- int n_free_blocks;
- struct free_block free_blocks[MAX_FREE_BLOCKS];
- size_t max_size;
-
-#ifdef GGML_ALLOCATOR_DEBUG
- struct {
- const struct ggml_tensor * tensor;
- size_t offset;
- } allocated_tensors[1024];
-#endif
-};
-
-#ifdef GGML_ALLOCATOR_DEBUG
-static void add_allocated_tensor(struct ggml_dyn_tallocr * alloc, size_t offset, const struct ggml_tensor * tensor) {
- for (int i = 0; i < 1024; i++) {
- if (alloc->allocated_tensors[i].tensor == NULL) {
- alloc->allocated_tensors[i].tensor = tensor;
- alloc->allocated_tensors[i].offset = offset;
- return;
- }
- }
- GGML_ASSERT(!"out of allocated_tensors");
-}
-static void remove_allocated_tensor(struct ggml_dyn_tallocr * alloc, size_t offset, const struct ggml_tensor * tensor) {
- for (int i = 0; i < 1024; i++) {
- if (alloc->allocated_tensors[i].offset == offset) {
- alloc->allocated_tensors[i].tensor = NULL;
- return;
- }
- }
- fprintf(stderr, "tried to free tensor %s not found\n", tensor->name);
- GGML_ASSERT(!"tensor not found");
-}
-#endif
-
-static size_t ggml_dyn_tallocr_alloc(struct ggml_dyn_tallocr * alloc, size_t size, const struct ggml_tensor * tensor) {
- size = aligned_offset(NULL, size, alloc->alignment);
-
- AT_PRINTF("%s: allocating %s (%zu bytes) - ", __func__, tensor->name, size);
-
- size_t max_avail = 0;
-
- // find the best fitting free block besides the last block
- int best_fit_block = -1;
- size_t best_fit_size = SIZE_MAX;
- for (int i = 0; i < alloc->n_free_blocks - 1; i++) {
- struct free_block * block = &alloc->free_blocks[i];
- max_avail = MAX(max_avail, block->size);
- if (block->size >= size && block->size <= best_fit_size) {
- best_fit_block = i;
- best_fit_size = block->size;
- }
- }
-
- if (best_fit_block == -1) {
- // the last block is our last resort
- struct free_block * block = &alloc->free_blocks[alloc->n_free_blocks - 1];
- max_avail = MAX(max_avail, block->size);
- if (block->size >= size) {
- best_fit_block = alloc->n_free_blocks - 1;
- } else {
- // this should never happen
- fprintf(stderr, "%s: not enough space in the buffer to allocate %zu bytes, largest block available %zu bytes\n",
- __func__, size, max_avail);
- GGML_ASSERT(!"not enough space in the buffer");
- GGML_UNREACHABLE();
- }
- }
-
- struct free_block * block = &alloc->free_blocks[best_fit_block];
- size_t offset = block->offset;
- block->offset = offset + size;
- block->size -= size;
- if (block->size == 0) {
- // remove block if empty
- alloc->n_free_blocks--;
- for (int j = best_fit_block; j < alloc->n_free_blocks; j++) {
- alloc->free_blocks[j] = alloc->free_blocks[j+1];
- }
- }
-
- AT_PRINTF("block %d, offset %zu\n", best_fit_block, offset);
-
-#ifdef GGML_ALLOCATOR_DEBUG
- add_allocated_tensor(alloc, offset, tensor);
- size_t cur_max = offset + size;
- if (cur_max > alloc->max_size) {
- // sort allocated_tensors by offset
- for (int i = 0; i < 1024; i++) {
- for (int j = i + 1; j < 1024; j++) {
- if (alloc->allocated_tensors[i].offset > alloc->allocated_tensors[j].offset) {
- const struct ggml_tensor * tmp_tensor = alloc->allocated_tensors[i].tensor;
- size_t tmp_offset = alloc->allocated_tensors[i].offset;
- alloc->allocated_tensors[i].tensor = alloc->allocated_tensors[j].tensor;
- alloc->allocated_tensors[i].offset = alloc->allocated_tensors[j].offset;
- alloc->allocated_tensors[j].tensor = tmp_tensor;
- alloc->allocated_tensors[j].offset = tmp_offset;
- }
- }
- }
- fprintf(stderr, "max_size = %.2f MB: tensors: ", cur_max / 1024.0 / 1024.0);
- for (int i = 0; i < 1024; i++) {
- if (alloc->allocated_tensors[i].tensor) {
- fprintf(stderr, "%s [%zx-%zx] (%.2f MB) ", alloc->allocated_tensors[i].tensor->name,
- alloc->allocated_tensors[i].offset,
- alloc->allocated_tensors[i].offset + ggml_nbytes(alloc->allocated_tensors[i].tensor),
- ggml_nbytes(alloc->allocated_tensors[i].tensor) / 1024.0 / 1024.0);
- }
- }
- fprintf(stderr, "\n");
- }
-#endif
-
- alloc->max_size = MAX(alloc->max_size, offset + size);
-
- return offset;
-
- GGML_UNUSED(tensor);
-}
-
-// this is a very naive implementation, but for our case the number of free blocks should be very small
-static void ggml_dyn_tallocr_free_tensor(struct ggml_dyn_tallocr * alloc, size_t offset, size_t size, const struct ggml_tensor * tensor) {
- size = aligned_offset(NULL, size, alloc->alignment);
-
- AT_PRINTF("%s: freeing %s at %zu (%zu bytes) - n_free_blocks = %d\n", __func__, tensor->name, offset, size, alloc->n_free_blocks);
-
-#ifdef GGML_ALLOCATOR_DEBUG
- remove_allocated_tensor(alloc, offset, tensor);
-#endif
-
- // see if we can merge with an existing block
- for (int i = 0; i < alloc->n_free_blocks; i++) {
- struct free_block * block = &alloc->free_blocks[i];
- // check if ptr is at the end of the block
- if (block->offset + block->size == offset) {
- block->size += size;
- // check if we can merge with the next block
- if (i < alloc->n_free_blocks - 1 && block->offset + block->size == alloc->free_blocks[i+1].offset) {
- block->size += alloc->free_blocks[i+1].size;
- alloc->n_free_blocks--;
- for (int j = i+1; j < alloc->n_free_blocks; j++) {
- alloc->free_blocks[j] = alloc->free_blocks[j+1];
- }
- }
- return;
- }
- // check if ptr is at the beginning of the block
- if (offset + size == block->offset) {
- block->offset = offset;
- block->size += size;
- // check if we can merge with the previous block
- if (i > 0 && alloc->free_blocks[i-1].offset + alloc->free_blocks[i-1].size == block->offset) {
- alloc->free_blocks[i-1].size += block->size;
- alloc->n_free_blocks--;
- for (int j = i; j < alloc->n_free_blocks; j++) {
- alloc->free_blocks[j] = alloc->free_blocks[j+1];
- }
- }
- return;
- }
- }
- // otherwise, add a new block
- GGML_ASSERT(alloc->n_free_blocks < MAX_FREE_BLOCKS && "out of free blocks");
- // insert the new block in the correct position to keep the array sorted by address (to make merging blocks faster)
- int insert_pos = 0;
- while (insert_pos < alloc->n_free_blocks && alloc->free_blocks[insert_pos].offset < offset) {
- insert_pos++;
- }
- // shift all blocks from insert_pos onward to make room for the new block
- for (int i = alloc->n_free_blocks; i > insert_pos; i--) {
- alloc->free_blocks[i] = alloc->free_blocks[i-1];
- }
- // insert the new block
- alloc->free_blocks[insert_pos].offset = offset;
- alloc->free_blocks[insert_pos].size = size;
- alloc->n_free_blocks++;
-
- GGML_UNUSED(tensor);
-}
-
-static void ggml_dyn_tallocr_reset(struct ggml_dyn_tallocr * alloc) {
- alloc->n_free_blocks = 1;
- alloc->free_blocks[0].offset = 0;
- alloc->free_blocks[0].size = SIZE_MAX/2; // restrict maximum size of a measure allocator to half size_t max to avoid overflows
- alloc->max_size = 0;
-}
-
-static struct ggml_dyn_tallocr * ggml_dyn_tallocr_new(size_t alignment) {
- struct ggml_dyn_tallocr * alloc = (struct ggml_dyn_tallocr *)malloc(sizeof(struct ggml_dyn_tallocr));
-
- *alloc = (struct ggml_dyn_tallocr) {
- /*.alignment = */ alignment,
- /*.n_free_blocks = */ 0,
- /*.free_blocks = */ {{0}},
- /*.max_size = */ 0,
-#ifdef GGML_ALLOCATOR_DEBUG
- /*.allocated_tensors = */ {{0}},
-#endif
- };
-
- ggml_dyn_tallocr_reset(alloc);
-
- return alloc;
-}
-
-static void ggml_dyn_tallocr_free(struct ggml_dyn_tallocr * alloc) {
- free(alloc);
-}
-
-static size_t ggml_dyn_tallocr_max_size(struct ggml_dyn_tallocr * alloc) {
- return alloc->max_size;
-}
-
-
-/////////////////////////////////////
-
-// graph allocator
-
-struct hash_node {
- int n_children;
- int n_views;
- int buffer_id;
- size_t offset; // offset within the buffer
- bool allocated;
-};
-
-struct tensor_alloc {
- int buffer_id;
- size_t offset;
- size_t size_max; // 0 = pre-allocated, unused, or view
-};
-
-struct leaf_alloc {
- int buffer_id;
- struct tensor_alloc leaf;
-};
-
-struct node_alloc {
- struct tensor_alloc dst;
- struct tensor_alloc src[GGML_MAX_SRC];
-};
-
-struct ggml_gallocr {
- ggml_backend_buffer_type_t * bufts; // [n_buffers]
- ggml_backend_buffer_t * buffers; // [n_buffers]
- struct ggml_dyn_tallocr ** buf_tallocs; // [n_buffers]
- int n_buffers;
-
- struct ggml_hash_set hash_set;
- struct hash_node * hash_values; // [hash_set.size]
-
- struct node_alloc * node_allocs; // [n_nodes]
- int n_nodes;
-
- struct leaf_alloc * leaf_allocs; // [n_leafs]
- int n_leafs;
-};
-
-ggml_gallocr_t ggml_gallocr_new_n(ggml_backend_buffer_type_t * bufts, int n_bufs) {
- ggml_gallocr_t galloc = (ggml_gallocr_t)calloc(1, sizeof(struct ggml_gallocr));
- GGML_ASSERT(galloc != NULL);
-
- galloc->bufts = calloc(n_bufs, sizeof(ggml_backend_buffer_type_t));
- GGML_ASSERT(galloc->bufts != NULL);
-
- galloc->buffers = calloc(n_bufs, sizeof(ggml_backend_buffer_t));
- GGML_ASSERT(galloc->buffers != NULL);
-
- galloc->buf_tallocs = calloc(n_bufs, sizeof(struct ggml_dyn_tallocr *));
- GGML_ASSERT(galloc->buf_tallocs != NULL);
-
- for (int i = 0; i < n_bufs; i++) {
- galloc->bufts[i] = bufts[i];
- galloc->buffers[i] = NULL;
-
- // check if the same buffer type is used multiple times and reuse the same allocator
- for (int j = 0; j < i; j++) {
- if (bufts[i] == bufts[j]) {
- galloc->buf_tallocs[i] = galloc->buf_tallocs[j];
- break;
- }
- }
-
- if (galloc->buf_tallocs[i] == NULL) {
- size_t alignment = ggml_backend_buft_get_alignment(bufts[i]);
- galloc->buf_tallocs[i] = ggml_dyn_tallocr_new(alignment);
- }
- }
- galloc->n_buffers = n_bufs;
-
- return galloc;
-}
-
-ggml_gallocr_t ggml_gallocr_new(ggml_backend_buffer_type_t buft) {
- return ggml_gallocr_new_n(&buft, 1);
-}
-
-void ggml_gallocr_free(ggml_gallocr_t galloc) {
- if (galloc == NULL) {
- return;
- }
-
- for (int i = 0; i < galloc->n_buffers; i++) {
- if (galloc->buffers != NULL) {
- // skip if already freed
- bool freed = false;
- for (int j = 0; j < i; j++) {
- if (galloc->buffers[j] == galloc->buffers[i]) {
- freed = true;
- break;
- }
- }
- if (!freed) {
- ggml_backend_buffer_free(galloc->buffers[i]);
- }
- }
- if (galloc->buf_tallocs != NULL) {
- // skip if already freed
- bool freed = false;
- for (int j = 0; j < i; j++) {
- if (galloc->buf_tallocs[j] == galloc->buf_tallocs[i]) {
- freed = true;
- break;
- }
- }
- if (!freed) {
- ggml_dyn_tallocr_free(galloc->buf_tallocs[i]);
- }
- }
- }
-
- free(galloc->hash_set.keys);
- free(galloc->hash_values);
- free(galloc->bufts);
- free(galloc->buffers);
- free(galloc->buf_tallocs);
- free(galloc->node_allocs);
- free(galloc->leaf_allocs);
- free(galloc);
-}
-
-typedef struct ggml_gallocr * ggml_gallocr_t;
-
-static struct hash_node * ggml_gallocr_hash_get(ggml_gallocr_t galloc, struct ggml_tensor * t) {
- size_t i = ggml_hash_find_or_insert(galloc->hash_set, t);
- return &galloc->hash_values[i];
-}
-
-static bool ggml_gallocr_is_own(ggml_gallocr_t galloc, struct ggml_tensor * t) {
- return ggml_gallocr_hash_get(galloc, t)->allocated;
-}
-
-static void ggml_gallocr_set_node_offset(ggml_gallocr_t galloc, struct ggml_tensor * node, int buffer_id, size_t offset) {
- struct hash_node * hn = ggml_gallocr_hash_get(galloc, node);
- hn->buffer_id = buffer_id;
- hn->offset = offset;
- hn->allocated = true;
-}
-
-static bool ggml_gallocr_is_allocated(ggml_gallocr_t galloc, struct ggml_tensor * t) {
- return t->data != NULL || ggml_gallocr_hash_get(galloc, t)->allocated;
-}
-
-static void ggml_gallocr_allocate_node(ggml_gallocr_t galloc, struct ggml_tensor * node, int buffer_id) {
- struct hash_node * hn = ggml_gallocr_hash_get(galloc, node);
-
- if (!ggml_gallocr_is_allocated(galloc, node) && !ggml_is_view(node)) {
- hn->allocated = true;
- assert(hn->offset == 0);
-
- // try to reuse a parent's buffer (inplace)
- if (ggml_op_can_inplace(node->op)) {
- for (int i = 0; i < GGML_MAX_SRC; i++) {
- struct ggml_tensor * parent = node->src[i];
- if (parent == NULL) {
- continue;
- }
-
- // if the node's data is external, then we cannot re-use it
- if (!ggml_gallocr_is_own(galloc, parent)) {
- AT_PRINTF("not reusing parent %s for %s as %p is external\n", parent->name, node->name, parent->data);
- continue;
- }
-
- // outputs cannot be reused
- if (parent->flags & GGML_TENSOR_FLAG_OUTPUT || (parent->view_src != NULL && parent->view_src->flags & GGML_TENSOR_FLAG_OUTPUT)) {
- AT_PRINTF("not reusing parent %s for %s as it is an output\n", parent->name, node->name);
- continue;
- }
-
- if (!ggml_are_same_layout(node, parent)) {
- AT_PRINTF("not reusing parent %s for %s as layouts are different\n", parent->name, node->name);
- continue;
- }
-
- struct hash_node * p_hn = ggml_gallocr_hash_get(galloc, parent);
- if (p_hn->n_children == 1 && p_hn->n_views == 0) {
- if (ggml_is_view(parent)) {
- struct ggml_tensor * view_src = parent->view_src;
- struct hash_node * view_src_hn = ggml_gallocr_hash_get(galloc, view_src);
- if (view_src_hn->n_views == 1 && view_src_hn->n_children == 0 && view_src->data == parent->data) {
- AT_PRINTF("reusing view parent %s (%s) for %s\n", parent->name, view_src->name, node->name);
- assert(view_src_hn->offset == p_hn->offset);
- hn->buffer_id = p_hn->buffer_id;
- hn->offset = p_hn->offset;
- p_hn->allocated = false; // avoid freeing the parent
- view_src_hn->allocated = false;
- return;
- }
- } else {
- AT_PRINTF("reusing parent %s for %s\n", parent->name, node->name);
- hn->buffer_id = p_hn->buffer_id;
- hn->offset = p_hn->offset;
- p_hn->allocated = false; // avoid freeing the parent
- return;
- }
- }
- }
- }
- // allocate tensor from the buffer
- struct ggml_dyn_tallocr * alloc = galloc->buf_tallocs[buffer_id];
- ggml_backend_buffer_type_t buft = galloc->bufts[buffer_id];
- size_t size = ggml_backend_buft_get_alloc_size(buft, node);
- size_t offset = ggml_dyn_tallocr_alloc(alloc, size, node);
- hn->buffer_id = buffer_id;
- hn->offset = offset;
- return;
- }
-}
-
-static void ggml_gallocr_free_node(ggml_gallocr_t galloc, struct ggml_tensor * node) {
- // graph outputs are never freed
- if (node->flags & GGML_TENSOR_FLAG_OUTPUT) {
- AT_PRINTF("not freeing output %s\n", node->name);
- return;
- }
-
- struct hash_node * hn = ggml_gallocr_hash_get(galloc, node);
- size_t offset = hn->offset;
- int buffer_id = hn->buffer_id;
- struct ggml_dyn_tallocr * alloc = galloc->buf_tallocs[buffer_id];
- ggml_backend_buffer_type_t buft = galloc->bufts[buffer_id];
- size_t size = ggml_backend_buft_get_alloc_size(buft, node);
- ggml_dyn_tallocr_free_tensor(alloc, offset, size, node);
- hn->allocated = false;
-}
-
-static int get_node_buffer_id(const int * node_buffer_ids, int i) {
- return node_buffer_ids ? node_buffer_ids[i] : 0;
-}
-
-static void ggml_gallocr_alloc_graph_impl(ggml_gallocr_t galloc, struct ggml_cgraph * graph, const int * node_buffer_ids, const int * leaf_buffer_ids) {
- // clear hash tables
- memset(galloc->hash_set.keys, 0, galloc->hash_set.size * sizeof(struct ggml_tensor *));
- memset(galloc->hash_values, 0, galloc->hash_set.size * sizeof(struct hash_node));
-
- // allocate leafs
- // these may be tensors that the application is not using in the graph, but may still want to allocate for other purposes
- for (int i = 0; i < graph->n_leafs; i++) {
- struct ggml_tensor * leaf = graph->leafs[i];
- ggml_gallocr_allocate_node(galloc, leaf, get_node_buffer_id(leaf_buffer_ids, i));
- }
-
- // count number of children and views
- // allocate other graph inputs and leafs first to avoid overwriting them
- for (int i = 0; i < graph->n_nodes; i++) {
- struct ggml_tensor * node = graph->nodes[i];
-
- // TODO: better way to add external dependencies
- // GGML_OP_NONE does not appear normally in the graph nodes, but is used by ggml-backend to add dependencies to
- // control when some tensors are allocated and freed. in this case, the dependencies are in `src`, but the node
- // itself is never used and should not be considered a dependency
- if (ggml_is_view(node) && node->op != GGML_OP_NONE) {
- struct ggml_tensor * view_src = node->view_src;
- ggml_gallocr_hash_get(galloc, view_src)->n_views += 1;
- }
-
- if (node->flags & GGML_TENSOR_FLAG_INPUT) {
- ggml_gallocr_allocate_node(galloc, graph->nodes[i], get_node_buffer_id(node_buffer_ids, i));
- }
-
- for (int j = 0; j < GGML_MAX_SRC; j++) {
- struct ggml_tensor * src = node->src[j];
- if (src == NULL) {
- continue;
- }
-
- ggml_gallocr_hash_get(galloc, src)->n_children += 1;
-
- // allocate explicit inputs
- if (src->flags & GGML_TENSOR_FLAG_INPUT) {
- ggml_gallocr_allocate_node(galloc, src, get_node_buffer_id(node_buffer_ids, i));
- }
- }
- }
-
- // allocate tensors
- for (int i = 0; i < graph->n_nodes; i++) {
- struct ggml_tensor * node = graph->nodes[i];
- int buffer_id = get_node_buffer_id(node_buffer_ids, i);
-
- // allocate parents (only leafs need to be allocated at this point)
- for (int j = 0; j < GGML_MAX_SRC; j++) {
- struct ggml_tensor * parent = node->src[j];
- if (parent == NULL) {
- continue;
- }
- ggml_gallocr_allocate_node(galloc, parent, buffer_id);
- }
-
- // allocate node
- ggml_gallocr_allocate_node(galloc, node, buffer_id);
-
- AT_PRINTF("exec: %s (%s) <= ", ggml_op_desc(node), node->name);
- for (int j = 0; j < GGML_MAX_SRC; j++) {
- struct ggml_tensor * parent = node->src[j];
- if (parent == NULL) {
- continue;
- }
- AT_PRINTF("%s", parent->name);
- if (j < GGML_MAX_SRC - 1 && node->src[j + 1] != NULL) {
- AT_PRINTF(", ");
- }
- }
- AT_PRINTF("\n");
-
- // update parents
- for (int j = 0; j < GGML_MAX_SRC; j++) {
- struct ggml_tensor * parent = node->src[j];
- if (parent == NULL) {
- continue;
- }
- struct hash_node * p_hn = ggml_gallocr_hash_get(galloc, parent);
- p_hn->n_children -= 1;
-
- AT_PRINTF("parent %s: %d children, %d views, allocated: %d\n",
- parent->name, p_hn->n_children, p_hn->n_views, p_hn->allocated);
-
- if (p_hn->n_children == 0 && p_hn->n_views == 0) {
- if (ggml_is_view(parent)) {
- struct ggml_tensor * view_src = parent->view_src;
- struct hash_node * view_src_hn = ggml_gallocr_hash_get(galloc, view_src);
- view_src_hn->n_views -= 1;
- AT_PRINTF("view_src %s: %d children, %d views\n",
- view_src->name, view_src_hn->n_children, view_src_hn->n_views);
- if (view_src_hn->n_views == 0 && view_src_hn->n_children == 0 && view_src_hn->allocated) {
- ggml_gallocr_free_node(galloc, view_src);
- }
- }
- else if (p_hn->allocated) {
- ggml_gallocr_free_node(galloc, parent);
- }
- }
- AT_PRINTF("\n");
- }
- }
-}
-
-bool ggml_gallocr_reserve_n(ggml_gallocr_t galloc, struct ggml_cgraph * graph, const int * node_buffer_ids, const int * leaf_buffer_ids) {
- size_t hash_size = graph->visited_hash_table.size;
-
- // initialize hash table
- if (galloc->hash_set.size < hash_size) {
- free(galloc->hash_set.keys);
- free(galloc->hash_values);
- galloc->hash_set.size = hash_size;
- galloc->hash_set.keys = calloc(hash_size, sizeof(struct ggml_tensor *));
- galloc->hash_values = calloc(hash_size, sizeof(struct hash_node));
- GGML_ASSERT(galloc->hash_set.keys != NULL);
- GGML_ASSERT(galloc->hash_values != NULL);
- } else {
- // reset hash table
- memset(galloc->hash_set.keys, 0, sizeof(struct ggml_tensor *) * galloc->hash_set.size);
- memset(galloc->hash_values, 0, sizeof(struct hash_node) * galloc->hash_set.size);
- }
-
- // reset allocators
- for (int i = 0; i < galloc->n_buffers; i++) {
- ggml_dyn_tallocr_reset(galloc->buf_tallocs[i]);
- }
-
- // allocate in hash table
- ggml_gallocr_alloc_graph_impl(galloc, graph, node_buffer_ids, leaf_buffer_ids);
-
- // set the node_allocs from the hash table
- if (galloc->n_nodes < graph->n_nodes) {
- free(galloc->node_allocs);
- galloc->node_allocs = calloc(graph->n_nodes, sizeof(struct node_alloc));
- GGML_ASSERT(galloc->node_allocs != NULL);
- }
- galloc->n_nodes = graph->n_nodes;
- for (int i = 0; i < graph->n_nodes; i++) {
- struct ggml_tensor * node = graph->nodes[i];
- struct node_alloc * node_alloc = &galloc->node_allocs[i];
- if (node->view_src || node->data) {
- node_alloc->dst.buffer_id = -1;
- node_alloc->dst.offset = SIZE_MAX;
- node_alloc->dst.size_max = 0;
- } else {
- struct hash_node * hn = ggml_gallocr_hash_get(galloc, node);
- node_alloc->dst.buffer_id = hn->buffer_id;
- node_alloc->dst.offset = hn->offset;
- node_alloc->dst.size_max = ggml_backend_buft_get_alloc_size(galloc->bufts[hn->buffer_id], node);
- }
- for (int j = 0; j < GGML_MAX_SRC; j++) {
- struct ggml_tensor * src = node->src[j];
- if (!src || src->view_src || src->data) {
- node_alloc->src[j].buffer_id = -1;
- node_alloc->src[j].offset = SIZE_MAX;
- node_alloc->src[j].size_max = 0;
- } else {
- struct hash_node * hn = ggml_gallocr_hash_get(galloc, src);
- node_alloc->src[j].buffer_id = hn->buffer_id;
- node_alloc->src[j].offset = hn->offset;
- node_alloc->src[j].size_max = ggml_backend_buft_get_alloc_size(galloc->bufts[hn->buffer_id], src);
- }
- }
- }
- if (galloc->n_leafs < graph->n_leafs) {
- free(galloc->leaf_allocs);
- galloc->leaf_allocs = calloc(graph->n_leafs, sizeof(galloc->leaf_allocs[0]));
- GGML_ASSERT(galloc->leaf_allocs != NULL);
- }
- galloc->n_leafs = graph->n_leafs;
- for (int i = 0; i < graph->n_leafs; i++) {
- struct ggml_tensor * leaf = graph->leafs[i];
- struct hash_node * hn = ggml_gallocr_hash_get(galloc, leaf);
- galloc->leaf_allocs[i].buffer_id = hn->buffer_id;
- if (leaf->view_src || leaf->data) {
- galloc->leaf_allocs[i].leaf.buffer_id = -1;
- galloc->leaf_allocs[i].leaf.offset = SIZE_MAX;
- galloc->leaf_allocs[i].leaf.size_max = 0;
- } else {
- galloc->leaf_allocs[i].leaf.buffer_id = hn->buffer_id;
- galloc->leaf_allocs[i].leaf.offset = hn->offset;
- galloc->leaf_allocs[i].leaf.size_max = ggml_backend_buft_get_alloc_size(galloc->bufts[hn->buffer_id], leaf);
- }
- }
-
- // reallocate buffers if needed
- for (int i = 0; i < galloc->n_buffers; i++) {
- // if the buffer type is used multiple times, we reuse the same buffer
- for (int j = 0; j < i; j++) {
- if (galloc->buf_tallocs[j] == galloc->buf_tallocs[i]) {
- galloc->buffers[i] = galloc->buffers[j];
- break;
- }
- }
-
- size_t cur_size = galloc->buffers[i] ? ggml_backend_buffer_get_size(galloc->buffers[i]) : 0;
- size_t new_size = ggml_dyn_tallocr_max_size(galloc->buf_tallocs[i]);
-
- // even if there are no tensors allocated in this buffer, we still need to allocate it to initialize views
- if (new_size > cur_size || galloc->buffers[i] == NULL) {
-#ifndef NDEBUG
- fprintf(stderr, "%s: reallocating %s buffer from size %.02f MiB to %.02f MiB\n", __func__, ggml_backend_buft_name(galloc->bufts[i]), cur_size / 1024.0 / 1024.0, new_size / 1024.0 / 1024.0);
-#endif
-
- ggml_backend_buffer_free(galloc->buffers[i]);
- galloc->buffers[i] = ggml_backend_buft_alloc_buffer(galloc->bufts[i], new_size);
- if (galloc->buffers[i] == NULL) {
- fprintf(stderr, "%s: failed to allocate %s buffer of size %zu\n", __func__, ggml_backend_buft_name(galloc->bufts[i]), new_size);
- return false;
- }
- }
- }
-
- return true;
-}
-
-bool ggml_gallocr_reserve(ggml_gallocr_t galloc, struct ggml_cgraph *graph) {
- return ggml_gallocr_reserve_n(galloc, graph, NULL, NULL);
-}
-
-static void ggml_gallocr_init_tensor(ggml_gallocr_t galloc, struct ggml_tensor * tensor, struct tensor_alloc * tensor_alloc) {
- int buffer_id = tensor_alloc->buffer_id;
- assert(tensor->data || tensor->view_src || ggml_backend_buffer_get_alloc_size(galloc->buffers[buffer_id], tensor) <= tensor_alloc->size_max);
-
- if (tensor->view_src != NULL) {
- if (tensor->buffer == NULL) {
- assert(tensor_alloc->offset == SIZE_MAX);
- if (tensor->view_src->buffer == NULL) {
- // this tensor was allocated without ggml-backend
- return;
- }
- ggml_backend_view_init(tensor);
- }
- } else {
- if (tensor->data == NULL) {
- assert(tensor_alloc->offset != SIZE_MAX);
- assert(ggml_backend_buffer_get_alloc_size(galloc->buffers[buffer_id], tensor) <= tensor_alloc->size_max);
- void * base = ggml_backend_buffer_get_base(galloc->buffers[buffer_id]);
- void * addr = (char *)base + tensor_alloc->offset;
- ggml_backend_tensor_alloc(galloc->buffers[buffer_id], tensor, addr);
- } else {
- if (tensor->buffer == NULL) {
- // this tensor was allocated without ggml-backend
- return;
- }
- }
- }
-}
-
-static bool ggml_gallocr_node_needs_realloc(ggml_gallocr_t galloc, struct ggml_tensor * node, struct tensor_alloc * talloc) {
- ggml_backend_buffer_type_t buft = talloc->buffer_id != -1 ? galloc->bufts[talloc->buffer_id] : NULL;
- size_t node_size = (node->data || node->view_src) ? 0 : ggml_backend_buft_get_alloc_size(buft, node);
- return talloc->size_max >= node_size;
-}
-
-static bool ggml_gallocr_needs_realloc(ggml_gallocr_t galloc, struct ggml_cgraph * graph) {
- if (galloc->n_nodes != graph->n_nodes) {
-#ifndef NDEBUG
- fprintf(stderr, "%s: graph has different number of nodes\n", __func__);
-#endif
- return true;
- }
-
- if (galloc->n_leafs != graph->n_leafs) {
-#ifndef NDEBUG
- fprintf(stderr, "%s: graph has different number of leafs\n", __func__);
-#endif
- return true;
- }
-
- for (int i = 0; i < graph->n_nodes; i++) {
- struct ggml_tensor * node = graph->nodes[i];
- struct node_alloc * node_alloc = &galloc->node_allocs[i];
-
- if (!ggml_gallocr_node_needs_realloc(galloc, node, &node_alloc->dst)) {
-#ifndef NDEBUG
- fprintf(stderr, "%s: node %s is not valid\n", __func__, node->name);
-#endif
- return true;
- }
-
- for (int j = 0; j < GGML_MAX_SRC; j++) {
- struct ggml_tensor * src = node->src[j];
- if (src == NULL) {
- continue;
- }
- if (!ggml_gallocr_node_needs_realloc(galloc, src, &node_alloc->src[j])) {
-#ifndef NDEBUG
- fprintf(stderr, "%s: src %d (%s) of node %s is not valid\n", __func__, j, src->name, node->name);
-#endif
- return true;
- }
- }
- }
-
- return false;
-}
-
-bool ggml_gallocr_alloc_graph(ggml_gallocr_t galloc, struct ggml_cgraph * graph) {
- if (ggml_gallocr_needs_realloc(galloc, graph)) {
- if (galloc->n_buffers == 1) {
-#ifndef NDEBUG
- fprintf(stderr, "%s: reallocating buffers automatically\n", __func__);
-#endif
- if (!ggml_gallocr_reserve(galloc, graph)) {
- return false;
- }
- } else {
-#ifndef NDEBUG
- fprintf(stderr, "%s: cannot reallocate multi buffer graph automatically, call reserve\n", __func__);
-#endif
- return false;
- }
- }
-
- // reset buffers
- for (int i = 0; i < galloc->n_buffers; i++) {
- if (galloc->buffers[i] != NULL) {
- ggml_backend_buffer_reset(galloc->buffers[i]);
- }
- }
-
- // allocate the graph tensors from the previous assignments
- // leafs
- for (int i = 0; i < graph->n_leafs; i++) {
- struct ggml_tensor * leaf = graph->leafs[i];
- struct leaf_alloc * leaf_alloc = &galloc->leaf_allocs[i];
- ggml_gallocr_init_tensor(galloc, leaf, &leaf_alloc->leaf);
- }
- // nodes
- for (int i = 0; i < graph->n_nodes; i++) {
- struct ggml_tensor * node = graph->nodes[i];
- struct node_alloc * node_alloc = &galloc->node_allocs[i];
- for (int j = 0; j < GGML_MAX_SRC; j++) {
- struct ggml_tensor * src = node->src[j];
- if (src == NULL) {
- continue;
- }
- ggml_gallocr_init_tensor(galloc, src, &node_alloc->src[j]);
- }
- ggml_gallocr_init_tensor(galloc, node, &node_alloc->dst);
- }
-
- return true;
-}
-
-size_t ggml_gallocr_get_buffer_size(ggml_gallocr_t galloc, int buffer_id) {
- GGML_ASSERT(buffer_id >= 0 && buffer_id < galloc->n_buffers);
-
- if (galloc->buffers[buffer_id] == NULL) {
- return 0;
- }
-
- for (int i = 0; i < buffer_id; i++) {
- if (galloc->buffers[i] == galloc->buffers[buffer_id]) {
- // this buffer is the same as a previous one due to the same buffer type being used multiple times
- // only return the buffer size the first time it appears to avoid double counting
- return 0;
- }
- }
-
- return ggml_backend_buffer_get_size(galloc->buffers[buffer_id]);
-}
-
-// utils
-
-static bool alloc_tensor_range(struct ggml_context * ctx,
- struct ggml_tensor * first, struct ggml_tensor * last,
- ggml_backend_buffer_type_t buft, size_t size,
- ggml_backend_buffer_t ** buffers, size_t * n_buffers) {
- ggml_backend_buffer_t buffer = ggml_backend_buft_alloc_buffer(buft, size);
- if (buffer == NULL) {
-#ifndef NDEBUG
- fprintf(stderr, "%s: failed to allocate %s buffer of size %zu\n", __func__, ggml_backend_buft_name(buft), size);
-#endif
- for (size_t i = 0; i < *n_buffers; i++) {
- ggml_backend_buffer_free((*buffers)[i]);
- }
- free(*buffers);
- return false;
- }
-
- struct ggml_tallocr tallocr = ggml_tallocr_new(buffer);
-
- for (struct ggml_tensor * t = first; t != last; t = ggml_get_next_tensor(ctx, t)) {
- if (t->data == NULL) {
- if (t->view_src == NULL) {
- ggml_tallocr_alloc(&tallocr, t);
- } else if (t->buffer == NULL) {
- ggml_backend_view_init(t);
- }
- } else {
- if (t->view_src != NULL && t->buffer == NULL) {
- // view of a pre-allocated tensor
- ggml_backend_view_init(t);
- }
- }
- }
-
- *buffers = realloc(*buffers, sizeof(ggml_backend_buffer_t) * (*n_buffers + 1));
- (*buffers)[(*n_buffers)++] = buffer;
-
- return true;
-}
-
-ggml_backend_buffer_t ggml_backend_alloc_ctx_tensors_from_buft(struct ggml_context * ctx, ggml_backend_buffer_type_t buft) {
- GGML_ASSERT(ggml_get_no_alloc(ctx) == true);
-
- size_t alignment = ggml_backend_buft_get_alignment(buft);
- size_t max_size = ggml_backend_buft_get_max_size(buft);
-
- ggml_backend_buffer_t * buffers = NULL;
- size_t n_buffers = 0;
-
- size_t cur_buf_size = 0;
- struct ggml_tensor * first = ggml_get_first_tensor(ctx);
- for (struct ggml_tensor * t = first; t != NULL; t = ggml_get_next_tensor(ctx, t)) {
- size_t this_size = 0;
- if (t->data == NULL && t->view_src == NULL) {
- this_size = GGML_PAD(ggml_backend_buft_get_alloc_size(buft, t), alignment);
- }
-
- if (this_size > max_size) {
- fprintf(stderr, "%s: tensor %s is too large to fit in a %s buffer (tensor size: %zu, max buffer size: %zu)\n",
- __func__, t->name,
- ggml_backend_buft_name(buft),
- this_size, max_size);
- for (size_t i = 0; i < n_buffers; i++) {
- ggml_backend_buffer_free(buffers[i]);
- }
- free(buffers);
- return NULL;
- }
-
- if ((cur_buf_size + this_size) > max_size) {
- // allocate tensors in the current buffer
- if (!alloc_tensor_range(ctx, first, t, buft, cur_buf_size, &buffers, &n_buffers)) {
- return NULL;
- }
- first = t;
- cur_buf_size = this_size;
- } else {
- cur_buf_size += this_size;
- }
- }
-
- // allocate remaining tensors
- if (cur_buf_size > 0) {
- if (!alloc_tensor_range(ctx, first, NULL, buft, cur_buf_size, &buffers, &n_buffers)) {
- return NULL;
- }
- }
-
- if (n_buffers == 0) {
-#ifndef NDEBUG
- fprintf(stderr, "%s: all tensors in the context are already allocated\n", __func__);
-#endif
- return NULL;
- }
-
- ggml_backend_buffer_t buffer;
- if (n_buffers == 1) {
- buffer = buffers[0];
- } else {
- buffer = ggml_backend_multi_buffer_alloc_buffer(buffers, n_buffers);
- }
- free(buffers);
- return buffer;
-}
-
-ggml_backend_buffer_t ggml_backend_alloc_ctx_tensors(struct ggml_context * ctx, ggml_backend_t backend) {
- return ggml_backend_alloc_ctx_tensors_from_buft(ctx, ggml_backend_get_default_buffer_type(backend));
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-05 08:11:20 +0000