aditya/llama.cpp
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Fix memory allocation issues and seg faults

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Georgi Gerganov 2023-03-24 00:11:53 +02:00
parent 483bab2e3d
commit 4870e455b3
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GPG key ID: 449E073F9DC10735
1 changed files with 16 additions and 18 deletions
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llama.cpp
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@ -102,6 +102,9 @@ struct llama_context {
// decode output (2-dimensional array: [n_tokens][n_vocab])
std::vector<float> logits;
bool logits_all = false;
// work buffer for transformer evaluation
std::vector<uint8_t> buf_eval;
};
struct llama_context_params llama_context_default_params() {
@ -627,27 +630,19 @@ static bool llama_eval_internal(
const int n_rot = hparams.n_embd/hparams.n_head;
auto & mem_per_token = lctx.mem_per_token;
auto & buf_eval = lctx.buf_eval;
// TODO: fix this hardcoded size
static size_t buf_size = 512u*1024*1024;
static void * buf = malloc(buf_size);
if (mem_per_token*(n_past + N + 16) > buf_eval.size()) {
const size_t buf_size_new = 1.618*buf_eval.size();
if (mem_per_token > 0 && mem_per_token*N > buf_size) {
const size_t buf_size_new = 1.3*(mem_per_token*N); // add 30% to account for ggml object overhead
//fprintf(stderr, "\n%s: reallocating buffer from %zu to %zu bytes\n", __func__, buf_size, buf_size_new);
//fprintf(stderr, "\n%s: reallocating buffer from %zu to %zu bytes\n", __func__, buf_eval.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;
}
buf_eval.resize(buf_size_new);
}
struct ggml_init_params params = {
/*.mem_size =*/ buf_size,
/*.mem_buffer =*/ buf,
/*.mem_size =*/ buf_eval.size(),
/*.mem_buffer =*/ buf_eval.data(),
};
struct ggml_context * ctx0 = ggml_init(params);
@ -832,10 +827,11 @@ static bool llama_eval_internal(
memcpy(logits_out.data(), (float *) ggml_get_data(inpL) + (n_vocab*(N-1)), sizeof(float)*n_vocab);
}
if (mem_per_token == 0) {
mem_per_token = ggml_used_mem(ctx0)/N;
if (N == 1) {
mem_per_token = ggml_used_mem(ctx0)/(n_past + N);
}
//fprintf(stderr, "used_mem = %zu\n", ggml_used_mem(ctx0));
//fprintf(stderr, "\nused_mem = %zu, %zu MB\n", ggml_used_mem(ctx0), ggml_used_mem(ctx0)/1024/1024);
ggml_free(ctx0);
@ -1416,6 +1412,8 @@ struct llama_context * llama_init_from_file(
return nullptr;
}
ctx->buf_eval.resize(512u*1024u*1024u);
return ctx;
}