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falcon: use *model-local* eval & scratch bufs (#1079)

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fixes memory leaks copied from ggml/examples based implementation
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Aaron Miller 2023-06-27 16:09:11 -07:00 committed by GitHub
parent 58cd346686
commit 28d41d4f6d
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1 changed files with 34 additions and 35 deletions
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67
gpt4all-backend/falcon.cpp
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@ -93,6 +93,13 @@ struct falcon_model {
struct ggml_context* ctx;
std::map<std::string, struct ggml_tensor*> tensors;
void * eval_buf;
size_t eval_buf_size;
void * scr0_buf;
size_t scr0_buf_size;
void * scr1_buf;
size_t scr1_buf_size;
};
static bool kv_cache_init(
@ -457,6 +464,12 @@ bool falcon_model_load(const std::string & fname, falcon_model & model, gpt_voca
fin.close();
model.eval_buf_size = 256u * 1024 * 1024;
model.eval_buf = malloc(model.eval_buf_size);
model.scr0_buf_size = 256u * 1024 * 1024;
model.scr0_buf = malloc(model.scr0_buf_size);
model.scr1_buf_size = 256u * 1024 * 1024;
model.scr1_buf = malloc(model.scr1_buf_size);
return true;
}
@ -489,37 +502,13 @@ bool falcon_eval(
const int version = hparams.falcon_version;
const size_t head_dim = n_embd / n_head;
static size_t buf_size = 256u*1024*1024;
static void * buf = malloc(buf_size);
// use 2 scratch buffers
// TODO: very hacky solution - reimplement in a more elegant way
static size_t scr0_size = 256u*1024*1024;
static void * scr0 = malloc(scr0_size);
static size_t scr1_size = 256u*1024*1024;
static void * scr1 = malloc(scr1_size);
if (mem_per_token > 0 && mem_per_token*N > buf_size) {
const size_t buf_size_new = 1.1*(mem_per_token*N); // add 10% to account for ggml object overhead
//printf("\n%s: reallocating buffer from %zu to %zu bytes\n", __func__, buf_size, buf_size_new);
// reallocate
buf_size = buf_size_new;
buf = realloc(buf, buf_size);
if (buf == nullptr) {
fprintf(stderr, "%s: failed to allocate %zu bytes\n", __func__, buf_size);
return false;
}
}
struct ggml_init_params params = {
.mem_size = buf_size,
.mem_buffer = buf,
struct ggml_init_params eval_ctx_params = {
.mem_size = model.eval_buf_size,
.mem_buffer = model.eval_buf,
.no_alloc = false,
};
struct ggml_context * ctx0 = ggml_init(params);
struct ggml_context * ctx0 = ggml_init(eval_ctx_params);
struct ggml_cgraph gf = {};
gf.n_threads = n_threads;
@ -537,7 +526,7 @@ bool falcon_eval(
struct ggml_tensor * cur;
struct ggml_tensor * layernorm_output;
ggml_set_scratch(ctx0, { 0, scr0_size, scr0, });
ggml_set_scratch(ctx0, {0, model.scr0_buf_size, model.scr0_buf, });
// self-attention
{
@ -678,7 +667,7 @@ bool falcon_eval(
}
}
ggml_set_scratch(ctx0, { 0, scr1_size, scr1, });
ggml_set_scratch(ctx0, {0, model.scr1_buf_size, model.scr1_buf, });
struct ggml_tensor* inpFF = layernorm_output;
struct ggml_tensor* attn_out = ggml_cpy(
@ -696,7 +685,7 @@ bool falcon_eval(
inpL = cur;
}
ggml_set_scratch(ctx0, { 0, scr0_size, scr0, });
ggml_set_scratch(ctx0, {0, model.scr0_buf_size, model.scr0_buf, });
// norm
{
@ -871,9 +860,20 @@ Falcon::Falcon() : d_ptr(new FalconPrivate) {
}
Falcon::~Falcon() {
if (d_ptr->model) {
delete d_ptr->model;
if(d_ptr->model->ctx) {
ggml_free(d_ptr->model->ctx);
d_ptr->model->ctx = nullptr;
}
if(d_ptr->model->eval_buf) {
free(d_ptr->model->eval_buf);
}
if(d_ptr->model->scr0_buf) {
free(d_ptr->model->scr0_buf);
}
if(d_ptr->model->scr1_buf) {
free(d_ptr->model->scr1_buf);
}
delete d_ptr->model;
}
bool Falcon::loadModel(const std::string &modelPath)
@ -1024,7 +1024,6 @@ DLL_EXPORT bool magic_match(std::istream& f) {
}
DLL_EXPORT LLModel *construct() {
std::cerr << "Falcon construct" << std::endl;
return new Falcon;
}
}