mirror of
https://github.com/ggerganov/llama.cpp.git
synced 2024-12-26 11:24:35 +00:00
allocator: fix partial offloading
This commit is contained in:
slaren
parent
e87840f9fd
commit
7de7882537
209
ggml-backend.c
209
ggml-backend.c
@ -6,12 +6,13 @@
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#include <string.h>
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#define UNUSED(x) (void)(x)
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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//#define GGML_ALLOCATOR_DEBUG
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//#define AT_PRINTF printf
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#define AT_PRINTF(...) ((void)0)
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// allocator
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static size_t aligned_offset(const void * buffer, size_t offset, size_t alignment) {
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@ -33,6 +34,7 @@ void ggml_backend_buffer_free(struct ggml_backend_buffer * alloc) {
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free(alloc);
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}
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#if 0
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// backend buffer allocator - simple - cannot free tensors, good for weights and small contexts
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struct ggml_allocator_simple_context {
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@ -47,8 +49,6 @@ static void ggml_allocator_simple_free_buffer(struct ggml_backend_buffer * alloc
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free(context);
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}
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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static void ggml_allocator_simple_alloc_tensor(struct ggml_backend_buffer * alloc, struct ggml_tensor * tensor) {
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struct ggml_allocator_simple_context * context = (struct ggml_allocator_simple_context *)alloc->context;
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@ -120,7 +120,7 @@ static struct ggml_backend_buffer * ggml_allocator_simple_init(void * data, size
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return allocator;
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}
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//////////////////////////////////////////////////////////////
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#endif
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// backend buffer allocator - default - can free tensors
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@ -136,7 +136,7 @@ struct ggml_allocator_default_context {
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size_t size;
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size_t alignment;
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int n_free_blocks;
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struct free_block free_blocks[1024];
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struct free_block free_blocks[MAX_FREE_BLOCKS];
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#ifdef GGML_ALLOCATOR_DEBUG
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struct ggml_tensor * allocated_tensors[1024];
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@ -190,8 +190,6 @@ void ggml_allocator_default_alloc_tensor(struct ggml_backend_buffer * alloc, str
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size_t max_avail = 0;
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//fprintf(stderr, "%s: allocating %s - %zu bytes\n", __func__, tensor->name, size);
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// find the best fitting free block
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int best_fit_block = -1;
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size_t best_fit_size = SIZE_MAX;
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@ -230,13 +228,13 @@ void ggml_allocator_default_alloc_tensor(struct ggml_backend_buffer * alloc, str
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add_allocated_tensor(allocator_ctx, tensor);
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size_t cur_max = (char*)addr - (char*)allocator_ctx->data + size;
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if (cur_max > alloc->max_size) {
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fprintf(stderr, "max_size = %.2f MB: tensors: ", cur_max / 1024.0 / 1024.0);
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printf("max_size = %.2f MB: tensors: ", cur_max / 1024.0 / 1024.0);
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for (int i = 0; i < 1024; i++) {
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if (allocator_ctx->allocated_tensors[i]) {
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fprintf(stderr, "%s (%.2f MB) ", allocator_ctx->allocated_tensors[i]->name, ggml_nbytes(allocator_ctx->allocated_tensors[i]) / 1024.0 / 1024.0);
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printf("%s (%.2f MB) ", allocator_ctx->allocated_tensors[i]->name, ggml_nbytes(allocator_ctx->allocated_tensors[i]) / 1024.0 / 1024.0);
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}
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}
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fprintf(stderr, "\n");
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printf("\n");
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}
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#endif
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@ -257,8 +255,9 @@ void ggml_allocator_default_free_tensor(struct ggml_backend_buffer * alloc, stru
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void * ptr = tensor->data;
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if (ptr < allocator_ctx->data || (char*)ptr >= (char*)allocator_ctx->data + alloc->max_size) {
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//fprintf(stderr, "%s: %s - tensor not in this buffer (%p - %p - %zu)\n", __func__, tensor->name, ptr, allocator_ctx->data, allocator_ctx->size);
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//GGML_ASSERT(!"trying to free a tensor that was not allocated by this allocator");
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// the tensor was not allocated in this buffer
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// this can happen because the allocator can try to free weights and other constants
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// the easiest way to deal with this is to just ignore it
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return;
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}
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@ -303,40 +302,42 @@ void ggml_allocator_default_free_tensor(struct ggml_backend_buffer * alloc, stru
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}
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}
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// otherwise, add a new block
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if (allocator_ctx->n_free_blocks < MAX_FREE_BLOCKS) {
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// insert the new block in the correct position to keep the array sorted
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int insert_pos = 0;
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while (insert_pos < allocator_ctx->n_free_blocks && allocator_ctx->free_blocks[insert_pos].addr < ptr) {
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insert_pos++;
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}
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// shift all blocks from insert_pos onward to make room for the new block
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for (int i = allocator_ctx->n_free_blocks; i > insert_pos; i--) {
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allocator_ctx->free_blocks[i] = allocator_ctx->free_blocks[i-1];
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}
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// insert the new block
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allocator_ctx->free_blocks[insert_pos].addr = ptr;
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allocator_ctx->free_blocks[insert_pos].size = size;
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allocator_ctx->n_free_blocks++;
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GGML_ASSERT(allocator_ctx->n_free_blocks < MAX_FREE_BLOCKS && "out of free blocks");
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// insert the new block in the correct position to keep the array sorted
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int insert_pos = 0;
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while (insert_pos < allocator_ctx->n_free_blocks && allocator_ctx->free_blocks[insert_pos].addr < ptr) {
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insert_pos++;
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}
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else {
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GGML_ASSERT(!"out of free blocks");
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// shift all blocks from insert_pos onward to make room for the new block
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for (int i = allocator_ctx->n_free_blocks; i > insert_pos; i--) {
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allocator_ctx->free_blocks[i] = allocator_ctx->free_blocks[i-1];
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}
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// insert the new block
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allocator_ctx->free_blocks[insert_pos].addr = ptr;
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allocator_ctx->free_blocks[insert_pos].size = size;
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allocator_ctx->n_free_blocks++;
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}
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static void ggml_allocator_default_reset(struct ggml_backend_buffer * alloc) {
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struct ggml_allocator_default_context * ctx = (struct ggml_allocator_default_context *)alloc->context;
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ctx->n_free_blocks = 1; // TODO
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ctx->n_free_blocks = 1;
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size_t align_offset = aligned_offset(ctx->data, 0, ctx->alignment);
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ctx->free_blocks[0].addr = (char *)ctx->data + align_offset;
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ctx->free_blocks[0].size = ctx->size - align_offset;
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}
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size_t ggml_allocator_default_get_alloc_size(struct ggml_backend_buffer * alloc, struct ggml_tensor * tensor) {
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return ggml_nbytes(tensor);
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UNUSED(alloc);
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}
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static const struct ggml_backend_buffer_interface ggml_allocator_default_interface = {
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/* .free_buffer = */ ggml_allocator_default_free_buffer,
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/* .alloc_tensor = */ ggml_allocator_default_alloc_tensor,
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/* .free_tensor = */ ggml_allocator_default_free_tensor,
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/* .reset = */ ggml_allocator_default_reset,
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/* .get_alloc_size = */ ggml_allocator_simple_get_alloc_size,
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/* .get_alloc_size = */ ggml_allocator_default_get_alloc_size,
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/* .init_tensor = */ NULL,
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/* .free_data = */ NULL,
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};
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@ -349,7 +350,7 @@ struct ggml_backend_buffer * ggml_allocator_default_init(void * data, size_t siz
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ctx->data = data;
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ctx->size = size;
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ctx->alignment = alignment;
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ctx->n_free_blocks = 1; // TODO
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ctx->n_free_blocks = 1;
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size_t align_offset = aligned_offset(data, 0, alignment);
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ctx->free_blocks[0].addr = (char *)data + align_offset;
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ctx->free_blocks[0].size = size - align_offset;
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@ -651,7 +652,7 @@ void ggml_graph_splits_add_n_va(struct ggml_graph_splits * splits, struct ggml_t
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split->src_inputs[i] = *inputs[i];
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split->dst_inputs[i] = ggml_dup_tensor(ctx, *inputs[i]);
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ggml_format_name(split->dst_inputs[i], "%s (split output)", split->src_inputs[i]->name);
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// TODO: maybe support different layings in ggml_backend_cpy_tensor instead
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// TODO: maybe support different layouts in ggml_backend_cpy_tensor instead
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for (int j = 0; j < GGML_MAX_DIMS; j++) {
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split->dst_inputs[i]->nb[j] = split->src_inputs[i]->nb[j];
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}
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@ -771,10 +772,6 @@ void ggml_graph_splits_compute(struct ggml_graph_splits * splits) {
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//exit(0);
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}
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void ggml_graph_allocate_tensors(struct ggml_cgraph * graph, struct ggml_context * ctx) {
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ggml_graph_allocate_tensors_n(&graph, 1, ctx);
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}
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static bool ggml_is_view(struct ggml_tensor * t) {
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return t->op == GGML_OP_RESHAPE || t->op == GGML_OP_VIEW || t->op == GGML_OP_TRANSPOSE ||
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t->op == GGML_OP_PERMUTE || t->op == GGML_OP_CPY;
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@ -794,56 +791,7 @@ struct ggml_tensor * view_parent(struct ggml_tensor * t) {
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}
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}
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#if 0
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void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, struct ggml_context * ctx) {
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struct ggml_buffer * buffer = ggml_get_buffer(ctx);
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for (int i = 0; i < n_graphs; i++) {
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struct ggml_cgraph * graph = graphs[i];
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for (int j = 0; j < graph->n_leafs; j++) {
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struct ggml_tensor * leaf = graph->leafs[j];
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GGML_ASSERT(leaf->backend == buffer->backend_buffer->backend);
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if (leaf->data == NULL) {
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//printf("allocating leaf %s\n", leaf->name);
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ggml_backend_buffer_tensor_alloc(buffer->backend_buffer, leaf);
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}
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}
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for (int j = 0; j < graph->n_nodes; j++) {
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struct ggml_tensor * node = graph->nodes[j];
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GGML_ASSERT(node->backend == buffer->backend_buffer->backend);
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if (node->data == NULL) {
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if (ggml_is_view(node)) {
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size_t offset;
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memcpy(&offset, node->op_params, sizeof(size_t));
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switch(node->op) {
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case GGML_OP_VIEW:
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//printf("view %s (%s), offset %zu\n", node->name, ggml_op_name(node->op), offset);
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node->data = (char *) node->src[0]->data + offset;
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break;
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case GGML_OP_RESHAPE:
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case GGML_OP_TRANSPOSE:
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case GGML_OP_PERMUTE:
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node->data = node->src[0]->data;
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break;
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case GGML_OP_CPY:
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node->data = node->src[1]->data;
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break;
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default:
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GGML_ASSERT(!"unknown view op");
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break;
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}
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} else {
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//printf("allocating tensor %s\n", node->name);
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ggml_backend_buffer_tensor_alloc(buffer->backend_buffer, node);
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}
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}
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}
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}
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//printf("\n\n\n");
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}
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#else
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void allocate_node(struct ggml_buffer * buffer, struct ggml_tensor * node) {
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static void allocate_node(struct ggml_buffer * buffer, struct ggml_tensor * node) {
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if (node->data == NULL) {
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if (ggml_is_view(node)) {
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size_t offset;
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@ -865,7 +813,6 @@ void allocate_node(struct ggml_buffer * buffer, struct ggml_tensor * node) {
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break;
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}
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} else {
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//printf("allocating tensor %s\n", node->name);
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// see if we can reuse a parent's buffer (inplace)
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for (int i = 0; i < GGML_MAX_SRC; i++) {
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struct ggml_tensor * parent = node->src[i];
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@ -897,7 +844,11 @@ void allocate_node(struct ggml_buffer * buffer, struct ggml_tensor * node) {
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}
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}
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void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, struct ggml_context * ctx) {
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static void ggml_graph_allocate_tensors_n(
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struct ggml_cgraph ** graphs, int n_graphs,
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struct ggml_tensor *** inputs, struct ggml_tensor *** outputs,
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struct ggml_context * ctx) {
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struct ggml_buffer * buffer = ggml_get_buffer(ctx);
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// reset counters
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@ -922,6 +873,7 @@ void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, s
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struct ggml_cgraph * gf = graphs[g];
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for (int i = 0; i < gf->n_nodes; i++) {
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struct ggml_tensor * node = gf->nodes[i];
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if (ggml_is_view(node)) {
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struct ggml_tensor * ancestor = node;
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do {
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@ -929,19 +881,13 @@ void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, s
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} while (ggml_is_view(ancestor));
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ancestor->n_views += 1;
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}
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for (int j = 0; j < GGML_MAX_SRC; j++) {
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struct ggml_tensor * parent = node->src[j];
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if (parent == NULL) {
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break;
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}
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parent->n_children += 1;
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if (ggml_is_view(parent)) {
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struct ggml_tensor * ancestor = parent;
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do {
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ancestor = view_parent(ancestor);
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} while (ggml_is_view(ancestor));
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ancestor->n_views += 1;
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}
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}
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}
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}
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@ -949,9 +895,16 @@ void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, s
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// allocate tensors
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for (int g = 0; g < n_graphs; g++) {
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struct ggml_cgraph * gf = graphs[g];
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AT_PRINTF("####### graph %d/%d\n", g, n_graphs);
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if (inputs != NULL && inputs[g] != NULL) {
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for (int i = 0; inputs[g][i] != NULL; i++) {
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struct ggml_tensor * input = inputs[g][i];
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AT_PRINTF("input: %s\n", input->name);
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allocate_node(buffer, input);
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}
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}
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for (int i = 0; i < gf->n_nodes; i++) {
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struct ggml_tensor * node = gf->nodes[i];
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bool is_view = ggml_is_view(node);
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// allocate parents (leafs)
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for (int j = 0; j < GGML_MAX_SRC; j++) {
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@ -959,19 +912,7 @@ void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, s
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if (parent == NULL) {
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break;
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}
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if (parent->freed) {
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printf("!!!!!! tensor %s used after free\n", parent->name);
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}
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if (ggml_is_view(parent)) {
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struct ggml_tensor * ancestor = parent;
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do {
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ancestor = view_parent(ancestor);
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} while (ggml_is_view(ancestor));
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if (ancestor->freed) {
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printf("!!!!!! tensor %s used after free (as view %s)\n", ancestor->name, parent->name);
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}
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allocate_node(buffer, ancestor);
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}
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GGML_ASSERT(!parent->freed && "tensor used after free");
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allocate_node(buffer, parent);
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}
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@ -998,6 +939,9 @@ void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, s
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break;
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}
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parent->n_children -= 1;
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//AT_PRINTF("parent %s: %d children, %d views\n", parent->name, parent->n_children, parent->n_views);
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if (parent->n_children == 0 && parent->n_views == 0) {
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if (ggml_is_view(parent)) {
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struct ggml_tensor * ancestor = parent;
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@ -1005,34 +949,36 @@ void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, s
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ancestor = view_parent(ancestor);
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} while (ggml_is_view(ancestor));
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ancestor->n_views -= 1;
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AT_PRINTF("ancestor %s: %d children, %d views\n", ancestor->name, ancestor->n_children, ancestor->n_views);
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if (ancestor->n_views == 0 && ancestor->n_children == 0 && ancestor->data != node->data) {
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//AT_PRINTF("free1\n");
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ggml_backend_buffer_tensor_free(buffer->backend_buffer, ancestor);
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}
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}
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else {
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if (parent->data != node->data) {
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//AT_PRINTF("free2\n");
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ggml_backend_buffer_tensor_free(buffer->backend_buffer, parent);
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}
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}
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}
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}
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if (is_view) {
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struct ggml_tensor * ancestor = node;
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do {
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ancestor = view_parent(ancestor);
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} while (ggml_is_view(ancestor));
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ancestor->n_views -= 1;
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if (ancestor->n_views == 0 && ancestor->n_children == 0) {
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ggml_backend_buffer_tensor_free(buffer->backend_buffer, ancestor);
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}
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}
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AT_PRINTF("\n");
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}
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if (outputs != NULL && outputs[g] != NULL) {
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for (int i = 0; outputs[g][i] != NULL; i++) {
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struct ggml_tensor * output = outputs[g][i];
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AT_PRINTF("output: %s\n", output->name);
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ggml_backend_buffer_tensor_free(buffer->backend_buffer, output);
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}
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}
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}
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}
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#endif
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void ggml_graph_allocate_tensors(struct ggml_cgraph * graph, struct ggml_context * ctx) {
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ggml_graph_allocate_tensors_n(&graph, 1, NULL, NULL, ctx);
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}
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void ggml_graph_splits_allocate_tensors(struct ggml_graph_splits * splits) {
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bool visited[GGML_MAX_SPLITS] = {false};
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@ -1041,20 +987,21 @@ void ggml_graph_splits_allocate_tensors(struct ggml_graph_splits * splits) {
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struct ggml_graph_split * split = &splits->splits[i];
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struct ggml_context * ctx = split->ctx;
|
||||
struct ggml_cgraph * backend_graphs[GGML_MAX_SPLITS];
|
||||
int num_graphs = 0;
|
||||
struct ggml_tensor ** graph_inputs[GGML_MAX_SPLITS];
|
||||
struct ggml_tensor ** graph_outputs[GGML_MAX_SPLITS];
|
||||
int n_graphs = 0;
|
||||
|
||||
for (int j = i; j < splits->n_splits; j++) {
|
||||
if (splits->splits[j].ctx == ctx) {
|
||||
backend_graphs[num_graphs] = splits->splits[j].graph;
|
||||
graph_inputs[n_graphs] = splits->splits[j].dst_inputs;
|
||||
graph_outputs[n_graphs] = j < splits->n_splits - 1 ? splits->splits[j + 1].src_inputs : NULL;
|
||||
backend_graphs[n_graphs] = splits->splits[j].graph;
|
||||
visited[j] = true;
|
||||
num_graphs++;
|
||||
// TODO: need to ensure that the output tensors are never freed
|
||||
// maybe this can be done automatically in ggml_graph_allocate_tensors_n by assuming that n_childs == 0 => output tensor
|
||||
n_graphs++;
|
||||
}
|
||||
}
|
||||
//printf("allocating tensors for %s [%d graphs/%d splits]\n", ggml_backend_name(ggml_get_buffer(ctx)->backend_buffer->backend), num_graphs, splits->n_splits);
|
||||
ggml_graph_allocate_tensors_n(backend_graphs, num_graphs, ctx);
|
||||
AT_PRINTF("allocating tensors for %s [%d graphs/%d splits]\n", ggml_backend_name(ggml_get_buffer(ctx)->backend_buffer->backend), n_graphs, splits->n_splits);
|
||||
ggml_graph_allocate_tensors_n(backend_graphs, n_graphs, graph_inputs, graph_outputs, ctx);
|
||||
}
|
||||
}
|
||||
//printf("done allocating tensors\n");
|
||||
}
|
||||
|
||||
|
||||
@ -155,7 +155,6 @@ extern "C" {
|
||||
|
||||
// graph tensor allocator
|
||||
GGML_API void ggml_graph_allocate_tensors(struct ggml_cgraph * graph, struct ggml_context * ctx);
|
||||
GGML_API void ggml_graph_allocate_tensors_n(struct ggml_cgraph ** graphs, int n_graphs, struct ggml_context * ctx);
|
||||
GGML_API void ggml_graph_splits_allocate_tensors(struct ggml_graph_splits * splits);
|
||||
|
||||
#ifdef __cplusplus
|
||||
|
||||
@ -1390,10 +1390,10 @@ static ggml_graph_splits llama_build_graph(
|
||||
ggml_set_name(cur, "ffn_norm");
|
||||
}
|
||||
|
||||
struct ggml_tensor * tmp = ggml_mul_mat(ctx_l,
|
||||
struct ggml_tensor * rw3 = ggml_mul_mat(ctx_l,
|
||||
model.layers[il].w3,
|
||||
cur);
|
||||
ggml_set_name(tmp, "result_w3");
|
||||
ggml_set_name(rw3, "result_w3");
|
||||
|
||||
cur = ggml_mul_mat(ctx_l,
|
||||
model.layers[il].w1,
|
||||
@ -1404,7 +1404,7 @@ static ggml_graph_splits llama_build_graph(
|
||||
cur = ggml_silu(ctx_l, cur);
|
||||
ggml_set_name(cur, "silu");
|
||||
|
||||
cur = ggml_mul(ctx_l, cur, tmp);
|
||||
cur = ggml_mul(ctx_l, cur, rw3);
|
||||
ggml_set_name(cur, "silu_x_result_w3");
|
||||
|
||||
cur = ggml_mul_mat(ctx_l,
|
||||
@ -1534,8 +1534,7 @@ static bool llama_eval_internal(
|
||||
// for big prompts, if BLAS is enabled, it is better to use only one thread
|
||||
// otherwise, the threads are spin-lock waiting for the BLAS calls and are degrading the performance
|
||||
n_threads = N >= 32 && ggml_cpu_has_blas() ? 1 : n_threads;
|
||||
// TODO: fix this - probably should be set during the model creation
|
||||
// ggml_backend_cpu_set_n_threads(const_cast<ggml_backend*>(model.backend_cpu), n_threads);
|
||||
ggml_backend_cpu_set_n_threads(const_cast<ggml_backend*>(model.backend_cpu), n_threads);
|
||||
|
||||
struct ggml_graph_splits splits = llama_build_graph(lctx, N, n_past, embd_input);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user