mirror of
https://github.com/ravenscroftj/turbopilot.git
synced 2024-10-01 01:06:01 -04:00
add starcoder/wizardcoder/santacoder support
This commit is contained in:
James Ravenscroft
parent
7eb10b225e
commit
dfa4b5e74f
@ -8,6 +8,9 @@
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#include <vector>
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#include <random>
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typedef void (*offload_func_t)(struct ggml_tensor * tensor);
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void ggml_nop(struct ggml_tensor * tensor);
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struct gpt_vocab
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{
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using id = int32_t;
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79
include/turbopilot/starcoder.hpp
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79
include/turbopilot/starcoder.hpp
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@ -0,0 +1,79 @@
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#ifndef __TURBOPILOT_STARCODER_H
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#define __TURBOPILOT_STARCODER_H
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#include <turbopilot/model.hpp>
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// default hparams (GPT-2 117M)
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// https://huggingface.co/bigcode/gpt_bigcode-santacoder/blob/main/config.json
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struct starcoder_hparams {
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int32_t n_vocab = 49280;
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int32_t n_ctx = 2048;
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int32_t n_embd = 2048;
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int32_t n_head = 16;
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int32_t n_layer = 24;
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int32_t ftype = 1;
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};
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struct starcoder_layer {
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// normalization
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struct ggml_tensor * ln_1_g;
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struct ggml_tensor * ln_1_b;
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struct ggml_tensor * ln_2_g;
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struct ggml_tensor * ln_2_b;
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// attention
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struct ggml_tensor * c_attn_attn_w;
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struct ggml_tensor * c_attn_attn_b;
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struct ggml_tensor * c_attn_proj_w;
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struct ggml_tensor * c_attn_proj_b;
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// mlp
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struct ggml_tensor * c_mlp_fc_w;
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struct ggml_tensor * c_mlp_fc_b;
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struct ggml_tensor * c_mlp_proj_w;
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struct ggml_tensor * c_mlp_proj_b;
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};
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struct starcoder_model {
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starcoder_hparams hparams;
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// normalization
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struct ggml_tensor * ln_f_g;
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struct ggml_tensor * ln_f_b;
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struct ggml_tensor * wte; // position embedding
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struct ggml_tensor * wpe; // token embedding
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struct ggml_tensor * lm_head; // language model head
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std::vector<starcoder_layer> layers;
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// key + value memory
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struct ggml_tensor * memory_k;
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struct ggml_tensor * memory_v;
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//
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struct ggml_context * ctx;
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std::map<std::string, struct ggml_tensor *> tensors;
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};
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class StarcoderModel : public TurbopilotModel {
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public:
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StarcoderModel(ModelConfig config, std::mt19937 &rng) : TurbopilotModel(config, rng){
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this->model = new starcoder_model{};
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this->vocab = new gpt_vocab{};
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}
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virtual ~StarcoderModel();
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bool load_model(std::string path);
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virtual std::stringstream predict(std::string prompt, int max_length, bool include_prompt);
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private:
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starcoder_model *model = NULL;
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gpt_vocab *vocab = NULL;
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};
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#endif //__TURBOPILOT_STARCODER_H
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@ -9,8 +9,10 @@ add_executable(${TURBOPILOT_TARGET}
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gptj.cpp
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common.cpp
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server.cpp
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starcoder.cpp
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../include/turbopilot/model.hpp
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../include/turbopilot/gptj.hpp
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../include/turbopilot/starcoder.hpp
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)
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@ -4,11 +4,15 @@
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#include <cmath>
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#include <random>
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void llama_nop(struct ggml_tensor * tensor) { // don't offload by default
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(void) tensor;
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}
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void gpt_vocab::add_special_token(const std::string & token) {
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special_tokens.push_back(token);
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}
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void gpt_split_words(std::string str, std::vector<std::string>& words) {
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const std::string pattern = R"('s|'t|'re|'ve|'m|'ll|'d| ?[[:alpha:]]+| ?[[:digit:]]+| ?[^\s[:alpha:][:digit:]]+|\s+(?!\S)|\s+)";
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const std::regex re(pattern);
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@ -249,6 +249,7 @@ bool gptj_eval(
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GPTJModel::~GPTJModel(){
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ggml_free(model->ctx);
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free(model);
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free(vocab);
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}
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bool GPTJModel::load_model(std::string fname) {
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@ -9,6 +9,7 @@
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#include <argparse/argparse.hpp>
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#include "turbopilot/model.hpp"
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#include "turbopilot/starcoder.hpp"
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#include "turbopilot/gptj.hpp"
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#include "turbopilot/server.hpp"
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@ -64,6 +65,9 @@ int main(int argc, char **argv)
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if(model_type.compare("codegen") == 0) {
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spdlog::info("Initializing GPT-J type model for '{}' model", model_type);
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model = new GPTJModel(config, rng);
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}else if(model_type.compare("starcoder") == 0 || model_type.compare("wizardcoder") == 0){
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spdlog::info("Initializing Starcoder/Wizardcoder type model for '{}' model type", model_type);
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model = new StarcoderModel(config, rng);
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}else{
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spdlog::error("Invalid model type: {}", model_type);
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}
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771
src/starcoder.cpp
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771
src/starcoder.cpp
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@ -0,0 +1,771 @@
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#include <iostream>
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#include <fstream>
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#include <turbopilot/starcoder.hpp>
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#include <ggml/ggml.h>
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#include <spdlog/spdlog.h>
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// evaluate the transformer
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//
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// - model: the model
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// - n_threads: number of threads to use
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// - n_past: the context size so far
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// - embd_inp: the embeddings of the tokens in the context
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// - embd_w: the predicted logits for the next token
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//
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bool starcoder_eval(
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const starcoder_model & model,
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const int n_threads,
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const int n_past,
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const std::vector<gpt_vocab::id> & embd_inp,
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std::vector<float> & embd_w,
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size_t & mem_per_token) {
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const int N = embd_inp.size();
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const auto & hparams = model.hparams;
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const int n_embd = hparams.n_embd;
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const int n_layer = hparams.n_layer;
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const int n_ctx = hparams.n_ctx;
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const int n_head = hparams.n_head;
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const int n_vocab = hparams.n_vocab;
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static size_t buf_size = 256u*1024*1024;
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static void * buf = malloc(buf_size);
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// use 2 scratch buffers
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// TODO: very hacky solution - reimplement in a more elegant way
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static size_t scr0_size = 256u*1024*1024;
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static void * scr0 = malloc(scr0_size);
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static size_t scr1_size = 256u*1024*1024;
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static void * scr1 = malloc(scr1_size);
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if (mem_per_token > 0 && mem_per_token*N > buf_size) {
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const size_t buf_size_new = 1.1*(mem_per_token*N); // add 10% to account for ggml object overhead
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//printf("\n%s: reallocating buffer from %zu to %zu bytes\n", __func__, buf_size, buf_size_new);
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// reallocate
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buf_size = buf_size_new;
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buf = realloc(buf, buf_size);
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if (buf == nullptr) {
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fprintf(stderr, "%s: failed to allocate %zu bytes\n", __func__, buf_size);
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return false;
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}
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}
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struct ggml_init_params params = {
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/*.mem_size =*/ buf_size,
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/*.mem_buffer =*/ buf,
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/*.no_alloc =*/ false,
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};
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struct ggml_context * ctx0 = ggml_init(params);
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struct ggml_cgraph gf = {};
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struct ggml_tensor * embd = ggml_new_tensor_1d(ctx0, GGML_TYPE_I32, N);
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memcpy(embd->data, embd_inp.data(), N*ggml_element_size(embd));
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struct ggml_tensor * position = ggml_new_tensor_1d(ctx0, GGML_TYPE_I32, N);
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for (int i = 0; i < N; ++i) {
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((int32_t *) position->data)[i] = n_past + i;
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}
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// wte + wpe
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struct ggml_tensor * inpL =
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ggml_add(ctx0,
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ggml_get_rows(ctx0, model.wte, embd),
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ggml_get_rows(ctx0, model.wpe, position));
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for (int il = 0; il < n_layer; ++il) {
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struct ggml_tensor * cur;
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ggml_set_scratch(ctx0, { 0, scr0_size, scr0, });
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// norm
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{
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// [ 768, N]
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cur = ggml_norm(ctx0, inpL);
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// cur = ln_1_g*cur + ln_1_b
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// [ 768, N]
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cur = ggml_add(ctx0,
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ggml_mul(ctx0,
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ggml_repeat(ctx0, model.layers[il].ln_1_g, cur),
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cur),
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ggml_repeat(ctx0, model.layers[il].ln_1_b, cur));
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}
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// attn
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// [2304, 768] - model.layers[il].c_attn_attn_w
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// [2304, 1] - model.layers[il].c_attn_attn_b
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// [ 768, N] - cur (in)
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// [2304, N] - cur (out)
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//
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// cur = attn_w*cur + attn_b
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// [2304, N]
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{
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cur = ggml_mul_mat(ctx0,
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model.layers[il].c_attn_attn_w,
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cur);
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cur = ggml_add(ctx0,
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ggml_repeat(ctx0, model.layers[il].c_attn_attn_b, cur),
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cur);
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}
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// self-attention
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{
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struct ggml_tensor * Qcur = ggml_view_2d(ctx0, cur, n_embd, N, cur->nb[1], 0*sizeof(float)*n_embd);
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struct ggml_tensor * Kcur = ggml_view_2d(ctx0, cur, n_embd, N, cur->nb[1], 1*sizeof(float)*n_embd);
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struct ggml_tensor * Vcur = ggml_view_2d(ctx0, cur, n_embd, N, cur->nb[1], 2*sizeof(float)*n_embd);
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// store key and value to memory
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if (N >= 1) {
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struct ggml_tensor * k = ggml_view_1d(ctx0, model.memory_k, N*n_embd, (ggml_element_size(model.memory_k)*n_embd)*(il*n_ctx + n_past));
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struct ggml_tensor * v = ggml_view_1d(ctx0, model.memory_v, N*n_embd, (ggml_element_size(model.memory_v)*n_embd)*(il*n_ctx + n_past));
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ggml_build_forward_expand(&gf, ggml_cpy(ctx0, Kcur, k));
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ggml_build_forward_expand(&gf, ggml_cpy(ctx0, Vcur, v));
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}
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// Q = Qcur.contiguous().view(n_embd/n_head, n_head, N).permute(0, 2, 1, 3)
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// [64, N, 12]
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struct ggml_tensor * Q =
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ggml_permute(ctx0,
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ggml_cpy(ctx0,
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Qcur,
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ggml_new_tensor_3d(ctx0, GGML_TYPE_F32, n_embd/n_head, n_head, N)),
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0, 2, 1, 3);
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// K = Kmem.view(n_embd/n_head, n_head, n_past + N).permute(0, 2, 1, 3)
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// [64, n_past + N, 12]
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struct ggml_tensor * K =
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ggml_permute(ctx0,
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ggml_reshape_3d(ctx0,
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ggml_view_1d(ctx0, model.memory_k, (n_past + N)*n_embd, il*n_ctx*ggml_element_size(model.memory_k)*n_embd),
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n_embd/n_head, n_head, n_past + N),
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0, 2, 1, 3); //TODO: need to be tiled
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// GG: flash attention
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//struct ggml_tensor * V =
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// ggml_cpy(ctx0,
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// ggml_permute(ctx0,
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// ggml_reshape_3d(ctx0,
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// ggml_view_1d(ctx0, model.memory_v, (n_past + N)*n_embd, il*n_ctx*ggml_element_size(model.memory_v)*n_embd),
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// n_embd/n_head, n_head, n_past + N),
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// 1, 2, 0, 3),
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// ggml_new_tensor_3d(ctx0, GGML_TYPE_F32, n_past + N, n_embd/n_head, n_head));
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//struct ggml_tensor * KQV = ggml_flash_attn(ctx0, Q, K, V, true);
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// K * Q
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// [n_past + N, N, 12]
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struct ggml_tensor * KQ = ggml_mul_mat(ctx0, K, Q); //TODO: check if it broadcasts
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// KQ_scaled = KQ / sqrt(n_embd/n_head)
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// [n_past + N, N, 12]
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struct ggml_tensor * KQ_scaled =
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ggml_scale_inplace(ctx0,
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KQ,
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ggml_new_f32(ctx0, 1.0f/sqrt(float(n_embd)/n_head))
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);
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// KQ_masked = mask_past(KQ_scaled)
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// [n_past + N, N, 12]
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struct ggml_tensor * KQ_masked = ggml_diag_mask_inf_inplace(ctx0, KQ_scaled, n_past);
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// KQ = soft_max(KQ_masked)
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// [n_past + N, N, 12]
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struct ggml_tensor * KQ_soft_max = ggml_soft_max_inplace(ctx0, KQ_masked);
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// V_trans = Vmem.view(n_embd/n_head, n_head, n_past + N).permute(1, 2, 0, 3).contiguous()
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// [n_past + N, 64, 12]
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struct ggml_tensor * V_trans =
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ggml_cpy(ctx0,
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ggml_permute(ctx0,
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ggml_reshape_3d(ctx0,
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ggml_view_1d(ctx0, model.memory_v, (n_past + N)*n_embd, il*n_ctx*ggml_element_size(model.memory_v)*n_embd),
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n_embd/n_head, n_head, n_past + N),
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1, 2, 0, 3),
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ggml_new_tensor_3d(ctx0, model.memory_v->type, n_past + N, n_embd/n_head, n_head));
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// KQV = transpose(V) * KQ_soft_max
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// [64, N, 12]
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struct ggml_tensor * KQV = ggml_mul_mat(ctx0, V_trans, KQ_soft_max);
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// KQV_merged = KQV.permute(0, 2, 1, 3)
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// [64, 12, N]
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struct ggml_tensor * KQV_merged = ggml_permute(ctx0, KQV, 0, 2, 1, 3);
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// cur = KQV_merged.contiguous().view(n_embd, N)
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// [768, N]
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cur = ggml_cpy(ctx0,
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KQV_merged,
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ggml_new_tensor_2d(ctx0, GGML_TYPE_F32, n_embd, N));
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}
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// projection
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// [ 768, 768] - model.layers[il].c_attn_proj_w
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// [ 768, 1] - model.layers[il].c_attn_proj_b
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// [ 768, N] - cur (in)
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// [ 768, N] - cur (out)
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//
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// cur = proj_w*cur + proj_b
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// [768, N]
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{
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cur = ggml_mul_mat(ctx0,
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model.layers[il].c_attn_proj_w,
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cur);
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cur = ggml_add(ctx0,
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ggml_repeat(ctx0, model.layers[il].c_attn_proj_b, cur),
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cur);
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}
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// add the input
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cur = ggml_add(ctx0, cur, inpL);
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struct ggml_tensor * inpFF = cur;
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ggml_set_scratch(ctx0, { 0, scr1_size, scr1, });
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// feed-forward network
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{
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// norm
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{
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cur = ggml_norm(ctx0, inpFF);
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// cur = ln_2_g*cur + ln_2_b
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// [ 768, N]
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cur = ggml_add(ctx0,
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ggml_mul(ctx0,
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ggml_repeat(ctx0, model.layers[il].ln_2_g, cur),
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cur),
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ggml_repeat(ctx0, model.layers[il].ln_2_b, cur));
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}
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// fully connected
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// [3072, 768] - model.layers[il].c_mlp_fc_w
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// [3072, 1] - model.layers[il].c_mlp_fc_b
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// [ 768, N] - cur (in)
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// [3072, N] - cur (out)
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//
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// cur = fc_w*cur + fc_b
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// [3072, N]
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cur = ggml_mul_mat(ctx0,
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model.layers[il].c_mlp_fc_w,
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cur);
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cur = ggml_add(ctx0,
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ggml_repeat(ctx0, model.layers[il].c_mlp_fc_b, cur),
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cur);
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// GELU activation
|
||||
// [3072, N]
|
||||
cur = ggml_gelu(ctx0, cur);
|
||||
|
||||
// projection
|
||||
// [ 768, 3072] - model.layers[il].c_mlp_proj_w
|
||||
// [ 768, 1] - model.layers[il].c_mlp_proj_b
|
||||
// [3072, N] - cur (in)
|
||||
// [ 768, N] - cur (out)
|
||||
//
|
||||
// cur = proj_w*cur + proj_b
|
||||
// [768, N]
|
||||
cur = ggml_mul_mat(ctx0,
|
||||
model.layers[il].c_mlp_proj_w,
|
||||
cur);
|
||||
|
||||
cur = ggml_add(ctx0,
|
||||
ggml_repeat(ctx0, model.layers[il].c_mlp_proj_b, cur),
|
||||
cur);
|
||||
}
|
||||
|
||||
// input for next layer
|
||||
inpL = ggml_add(ctx0, cur, inpFF);
|
||||
}
|
||||
|
||||
ggml_set_scratch(ctx0, { 0, scr0_size, scr0, });
|
||||
|
||||
// norm
|
||||
{
|
||||
// [ 768, N]
|
||||
inpL = ggml_norm(ctx0, inpL);
|
||||
|
||||
// inpL = ln_f_g*inpL + ln_f_b
|
||||
// [ 768, N]
|
||||
inpL = ggml_add(ctx0,
|
||||
ggml_mul(ctx0,
|
||||
ggml_repeat(ctx0, model.ln_f_g, inpL),
|
||||
inpL),
|
||||
ggml_repeat(ctx0, model.ln_f_b, inpL));
|
||||
}
|
||||
|
||||
ggml_set_scratch(ctx0, { 0, 0, nullptr, });
|
||||
|
||||
// inpL = WTE * inpL
|
||||
// [ 768, 50257] - model.lm_head
|
||||
// [ 768, N] - inpL
|
||||
inpL = ggml_mul_mat(ctx0, model.lm_head, inpL);
|
||||
|
||||
// logits -> probs
|
||||
//inpL = ggml_soft_max_inplace(ctx0, inpL);
|
||||
|
||||
// run the computation
|
||||
ggml_build_forward_expand(&gf, inpL);
|
||||
ggml_graph_compute_with_ctx(ctx0, &gf, n_threads);
|
||||
|
||||
//if (n_past%100 == 0) {
|
||||
// ggml_graph_print (&gf);
|
||||
// ggml_graph_dump_dot(&gf, NULL, "gpt-2.dot");
|
||||
//}
|
||||
|
||||
//embd_w.resize(n_vocab*N);
|
||||
//memcpy(embd_w.data(), ggml_get_data(inpL), sizeof(float)*n_vocab*N);
|
||||
|
||||
// return result just for the last token
|
||||
embd_w.resize(n_vocab);
|
||||
memcpy(embd_w.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;
|
||||
}
|
||||
//printf("used_mem = %zu MB\n", ggml_used_mem(ctx0)/(1024*1024));
|
||||
|
||||
ggml_free(ctx0);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
StarcoderModel::~StarcoderModel(){
|
||||
ggml_free(model->ctx);
|
||||
free(model);
|
||||
free(vocab);
|
||||
}
|
||||
|
||||
bool StarcoderModel::load_model(std::string fname) {
|
||||
printf("%s: loading model from '%s'\n", __func__, fname.c_str());
|
||||
|
||||
auto fin = std::ifstream(fname, std::ios::binary);
|
||||
if (!fin) {
|
||||
fprintf(stderr, "%s: failed to open '%s'\n", __func__, fname.c_str());
|
||||
return false;
|
||||
}
|
||||
|
||||
// verify magic
|
||||
{
|
||||
uint32_t magic;
|
||||
fin.read((char *) &magic, sizeof(magic));
|
||||
if (magic != GGML_FILE_MAGIC) {
|
||||
fprintf(stderr, "%s: invalid model file '%s' (bad magic)\n", __func__, fname.c_str());
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
// load hparams
|
||||
{
|
||||
auto & hparams = model->hparams;
|
||||
|
||||
fin.read((char *) &hparams.n_vocab, sizeof(hparams.n_vocab));
|
||||
fin.read((char *) &hparams.n_ctx, sizeof(hparams.n_ctx));
|
||||
fin.read((char *) &hparams.n_embd, sizeof(hparams.n_embd));
|
||||
fin.read((char *) &hparams.n_head, sizeof(hparams.n_head));
|
||||
fin.read((char *) &hparams.n_layer, sizeof(hparams.n_layer));
|
||||
fin.read((char *) &hparams.ftype, sizeof(hparams.ftype));
|
||||
|
||||
const int32_t qntvr = hparams.ftype / GGML_QNT_VERSION_FACTOR;
|
||||
|
||||
printf("%s: n_vocab = %d\n", __func__, hparams.n_vocab);
|
||||
printf("%s: n_ctx = %d\n", __func__, hparams.n_ctx);
|
||||
printf("%s: n_embd = %d\n", __func__, hparams.n_embd);
|
||||
printf("%s: n_head = %d\n", __func__, hparams.n_head);
|
||||
printf("%s: n_layer = %d\n", __func__, hparams.n_layer);
|
||||
printf("%s: ftype = %d\n", __func__, hparams.ftype);
|
||||
printf("%s: qntvr = %d\n", __func__, qntvr);
|
||||
|
||||
hparams.ftype %= GGML_QNT_VERSION_FACTOR;
|
||||
}
|
||||
|
||||
// load vocab
|
||||
{
|
||||
int32_t n_vocab = 0;
|
||||
fin.read((char *) &n_vocab, sizeof(n_vocab));
|
||||
|
||||
if (n_vocab != model->hparams.n_vocab) {
|
||||
fprintf(stderr, "%s: invalid model file '%s' (bad vocab size %d != %d)\n",
|
||||
__func__, fname.c_str(), n_vocab, model->hparams.n_vocab);
|
||||
return false;
|
||||
}
|
||||
|
||||
std::string word;
|
||||
std::vector<char> buf(128);
|
||||
|
||||
for (int i = 0; i < n_vocab; i++) {
|
||||
uint32_t len;
|
||||
fin.read((char *) &len, sizeof(len));
|
||||
|
||||
buf.resize(len);
|
||||
fin.read((char *) buf.data(), len);
|
||||
word.assign(buf.data(), len);
|
||||
|
||||
vocab->token_to_id[word] = i;
|
||||
vocab->id_to_token[i] = word;
|
||||
|
||||
// if (i < 10) fprintf(stderr, "%.s: vocab[%d] = '%s'\n", __func__, i, word.c_str());
|
||||
}
|
||||
|
||||
// Add StarChat special tokens.
|
||||
for (const std::string & token : {
|
||||
"<|system|>",
|
||||
"<|user|>",
|
||||
"<|assistant|>",
|
||||
"<|end|>",
|
||||
"<fim-prefix>",
|
||||
"<fim-middle>",
|
||||
"<fim-suffix>",
|
||||
"<fim-pad>",
|
||||
"<|end_of_turn|>"
|
||||
}) {
|
||||
if (vocab->token_to_id.find(token) != vocab->token_to_id.end()) {
|
||||
vocab->add_special_token(token);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// for the big tensors, we have the option to store the data in 16-bit floats or quantized
|
||||
// in order to save memory and also to speed up the computation
|
||||
ggml_type wtype = ggml_ftype_to_ggml_type((ggml_ftype) (model->hparams.ftype));
|
||||
if (wtype == GGML_TYPE_COUNT) {
|
||||
fprintf(stderr, "%s: invalid model file '%s' (bad ftype value %d)\n",
|
||||
__func__, fname.c_str(), model->hparams.ftype);
|
||||
return false;
|
||||
}
|
||||
|
||||
auto & ctx = model->ctx;
|
||||
|
||||
size_t ctx_size = 0;
|
||||
|
||||
{
|
||||
const auto & hparams = model->hparams;
|
||||
|
||||
const int n_embd = hparams.n_embd;
|
||||
const int n_layer = hparams.n_layer;
|
||||
const int n_ctx = hparams.n_ctx;
|
||||
const int n_vocab = hparams.n_vocab;
|
||||
|
||||
const int head_dim = n_embd / hparams.n_head;
|
||||
const int kv_heads = hparams.n_head; // 1 if MQA else hparams.n_head
|
||||
const int kv_dim = kv_heads * head_dim;
|
||||
|
||||
ctx_size += n_embd*ggml_type_sizef(GGML_TYPE_F32); // ln_f_g
|
||||
ctx_size += n_embd*ggml_type_sizef(GGML_TYPE_F32); // ln_f_b
|
||||
|
||||
ctx_size += n_vocab*n_embd*ggml_type_sizef(wtype); // wte
|
||||
ctx_size += n_ctx*n_embd*ggml_type_sizef(GGML_TYPE_F32); // wpe
|
||||
ctx_size += n_vocab*n_embd*ggml_type_sizef(wtype); // lm_head
|
||||
|
||||
ctx_size += n_layer*(n_embd*ggml_type_sizef(GGML_TYPE_F32)); // ln_1_g
|
||||
ctx_size += n_layer*(n_embd*ggml_type_sizef(GGML_TYPE_F32)); // ln_1_b
|
||||
|
||||
ctx_size += n_layer*(n_embd*ggml_type_sizef(GGML_TYPE_F32)); // ln_2_g
|
||||
ctx_size += n_layer*(n_embd*ggml_type_sizef(GGML_TYPE_F32)); // ln_2_b
|
||||
|
||||
ctx_size += n_layer*((n_embd + 2*kv_dim)*n_embd*ggml_type_sizef(wtype)); // c_attn_attn_w // TODO:
|
||||
ctx_size += n_layer*( (n_embd + 2*kv_dim)*ggml_type_sizef(GGML_TYPE_F32)); // c_attn_attn_b
|
||||
|
||||
ctx_size += n_layer*(n_embd*n_embd*ggml_type_sizef(wtype)); // c_attn_proj_w
|
||||
ctx_size += n_layer*( n_embd*ggml_type_sizef(GGML_TYPE_F32)); // c_attn_proj_b
|
||||
|
||||
ctx_size += n_layer*(4*n_embd*n_embd*ggml_type_sizef(wtype)); // c_mlp_fc_w
|
||||
ctx_size += n_layer*( 4*n_embd*ggml_type_sizef(GGML_TYPE_F32)); // c_mlp_fc_b
|
||||
|
||||
ctx_size += n_layer*(4*n_embd*n_embd*ggml_type_sizef(wtype)); // c_mlp_proj_w
|
||||
ctx_size += n_layer*( n_embd*ggml_type_sizef(GGML_TYPE_F32)); // c_mlp_proj_b
|
||||
|
||||
ctx_size += n_ctx*n_layer*n_embd*ggml_type_sizef(GGML_TYPE_F32); // memory_k
|
||||
ctx_size += n_ctx*n_layer*n_embd*ggml_type_sizef(GGML_TYPE_F32); // memory_v
|
||||
|
||||
ctx_size += (6 + 12*n_layer)*512; // object overhead
|
||||
|
||||
printf("%s: ggml ctx size = %6.2f MB\n", __func__, ctx_size/(1024.0*1024.0));
|
||||
}
|
||||
|
||||
// create the ggml context
|
||||
{
|
||||
struct ggml_init_params params = {
|
||||
/*.mem_size =*/ ctx_size,
|
||||
/*.mem_buffer =*/ NULL,
|
||||
/*.no_alloc =*/ false,
|
||||
};
|
||||
|
||||
model->ctx = ggml_init(params);
|
||||
if (!model->ctx) {
|
||||
fprintf(stderr, "%s: ggml_init() failed\n", __func__);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
// prepare memory for the weights
|
||||
{
|
||||
const auto & hparams = model->hparams;
|
||||
|
||||
const int n_embd = hparams.n_embd;
|
||||
const int n_layer = hparams.n_layer;
|
||||
const int n_ctx = hparams.n_ctx;
|
||||
const int n_vocab = hparams.n_vocab;
|
||||
|
||||
const int head_dim = n_embd / hparams.n_head;
|
||||
const int kv_heads = hparams.n_head; // 1 if MQA else hparams.n_head
|
||||
const int kv_dim = kv_heads * head_dim;
|
||||
|
||||
model->layers.resize(n_layer);
|
||||
|
||||
model->ln_f_g = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd);
|
||||
model->ln_f_b = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd);
|
||||
|
||||
model->wte = ggml_new_tensor_2d(ctx, wtype, n_embd, n_vocab);
|
||||
model->wpe = ggml_new_tensor_2d(ctx, GGML_TYPE_F32, n_embd, n_ctx);
|
||||
model->lm_head = ggml_new_tensor_2d(ctx, wtype, n_embd, n_vocab);
|
||||
|
||||
// map by name
|
||||
model->tensors["model/ln_f/g"] = model->ln_f_g;
|
||||
model->tensors["model/ln_f/b"] = model->ln_f_b;
|
||||
|
||||
model->tensors["model/wte"] = model->wte;
|
||||
model->tensors["model/wpe"] = model->wpe;
|
||||
model->tensors["model/lm_head"] = model->lm_head;
|
||||
|
||||
for (int i = 0; i < n_layer; ++i) {
|
||||
auto & layer = model->layers[i];
|
||||
|
||||
layer.ln_1_g = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd);
|
||||
layer.ln_1_b = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd);
|
||||
|
||||
layer.ln_2_g = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd);
|
||||
layer.ln_2_b = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd);
|
||||
|
||||
layer.c_attn_attn_w = ggml_new_tensor_2d(ctx, wtype, n_embd, n_embd + 2*kv_dim);
|
||||
layer.c_attn_attn_b = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd + 2*kv_dim);
|
||||
|
||||
layer.c_attn_proj_w = ggml_new_tensor_2d(ctx, wtype, n_embd, n_embd);
|
||||
layer.c_attn_proj_b = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd);
|
||||
|
||||
layer.c_mlp_fc_w = ggml_new_tensor_2d(ctx, wtype, n_embd, 4*n_embd); //TODO: 4*n_embd = config.n_inner
|
||||
layer.c_mlp_fc_b = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, 4*n_embd);
|
||||
|
||||
layer.c_mlp_proj_w = ggml_new_tensor_2d(ctx, wtype, 4*n_embd, n_embd);
|
||||
layer.c_mlp_proj_b = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_embd);
|
||||
|
||||
// map by name
|
||||
model->tensors["model/h" + std::to_string(i) + "/ln_1/g"] = layer.ln_1_g;
|
||||
model->tensors["model/h" + std::to_string(i) + "/ln_1/b"] = layer.ln_1_b;
|
||||
|
||||
model->tensors["model/h" + std::to_string(i) + "/ln_2/g"] = layer.ln_2_g;
|
||||
model->tensors["model/h" + std::to_string(i) + "/ln_2/b"] = layer.ln_2_b;
|
||||
|
||||
model->tensors["model/h" + std::to_string(i) + "/attn/c_attn/w"] = layer.c_attn_attn_w;
|
||||
model->tensors["model/h" + std::to_string(i) + "/attn/c_attn/b"] = layer.c_attn_attn_b;
|
||||
|
||||
model->tensors["model/h" + std::to_string(i) + "/attn/c_proj/w"] = layer.c_attn_proj_w;
|
||||
model->tensors["model/h" + std::to_string(i) + "/attn/c_proj/b"] = layer.c_attn_proj_b;
|
||||
|
||||
model->tensors["model/h" + std::to_string(i) + "/mlp/c_fc/w"] = layer.c_mlp_fc_w;
|
||||
model->tensors["model/h" + std::to_string(i) + "/mlp/c_fc/b"] = layer.c_mlp_fc_b;
|
||||
|
||||
model->tensors["model/h" + std::to_string(i) + "/mlp/c_proj/w"] = layer.c_mlp_proj_w;
|
||||
model->tensors["model/h" + std::to_string(i) + "/mlp/c_proj/b"] = layer.c_mlp_proj_b;
|
||||
}
|
||||
}
|
||||
|
||||
// key + value memory
|
||||
{
|
||||
const auto & hparams = model->hparams;
|
||||
|
||||
const int n_embd = hparams.n_embd;
|
||||
const int n_layer = hparams.n_layer;
|
||||
const int n_ctx = hparams.n_ctx;
|
||||
|
||||
const int n_mem = n_layer*n_ctx;
|
||||
const int n_elements = n_embd*n_mem;
|
||||
|
||||
model->memory_k = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_elements);
|
||||
model->memory_v = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, n_elements);
|
||||
|
||||
const size_t memory_size = ggml_nbytes(model->memory_k) + ggml_nbytes(model->memory_v);
|
||||
|
||||
printf("%s: memory size = %8.2f MB, n_mem = %d\n", __func__, memory_size/1024.0/1024.0, n_mem);
|
||||
}
|
||||
|
||||
// load weights
|
||||
{
|
||||
size_t total_size = 0;
|
||||
|
||||
bool has_lm_head = false;
|
||||
|
||||
while (true) {
|
||||
int32_t n_dims;
|
||||
int32_t length;
|
||||
int32_t ttype;
|
||||
|
||||
fin.read(reinterpret_cast<char *>(&n_dims), sizeof(n_dims));
|
||||
fin.read(reinterpret_cast<char *>(&length), sizeof(length));
|
||||
fin.read(reinterpret_cast<char *>(&ttype), sizeof(ttype));
|
||||
|
||||
if (fin.eof()) {
|
||||
break;
|
||||
}
|
||||
|
||||
int32_t nelements = 1;
|
||||
int32_t ne[2] = { 1, 1 };
|
||||
for (int i = 0; i < n_dims; ++i) {
|
||||
fin.read(reinterpret_cast<char *>(&ne[i]), sizeof(ne[i]));
|
||||
nelements *= ne[i];
|
||||
}
|
||||
|
||||
std::string name(length, 0);
|
||||
fin.read(&name[0], length);
|
||||
|
||||
if (model->tensors.find(name.data()) == model->tensors.end()) {
|
||||
fprintf(stderr, "%s: unknown tensor '%s' in model file\n", __func__, name.data());
|
||||
return false;
|
||||
}
|
||||
|
||||
auto tensor = model->tensors[name.data()];
|
||||
if (tensor->ne[0] != ne[0] || tensor->ne[1] != ne[1]) {
|
||||
fprintf(stderr, "%s: tensor '%s' has wrong shape in model file: got [%d, %d], expected [%d, %d]\n",
|
||||
__func__, name.data(), (int) tensor->ne[0], (int) tensor->ne[1], ne[0], ne[1]);
|
||||
return false;
|
||||
}
|
||||
if (ggml_nelements(tensor) != nelements) {
|
||||
fprintf(stderr, "%s: tensor '%s' has wrong size in model file. got %d, expected %d\n",
|
||||
__func__, name.data(), (int) ggml_nelements(tensor), nelements);
|
||||
return false;
|
||||
}
|
||||
|
||||
// for debugging
|
||||
if (0) {
|
||||
printf("%24s - [%5d, %5d], type = %6s, %6.2f MB, %9zu bytes\n", name.data(), ne[0], ne[1], ggml_type_name(ggml_type(ttype)), ggml_nbytes(tensor)/1024.0/1024.0, ggml_nbytes(tensor));
|
||||
}
|
||||
|
||||
const size_t bpe = ggml_type_size(ggml_type(ttype));
|
||||
|
||||
if ((nelements*bpe)/ggml_blck_size(tensor->type) != ggml_nbytes(tensor)) {
|
||||
fprintf(stderr, "%s: tensor '%s' has wrong size in model file: got %zu, expected %zu\n",
|
||||
__func__, name.data(), ggml_nbytes(tensor), nelements*bpe);
|
||||
return false;
|
||||
}
|
||||
|
||||
fin.read(reinterpret_cast<char *>(tensor->data), ggml_nbytes(tensor));
|
||||
|
||||
// GPT-2 models share the WTE tensor as the LM head
|
||||
if (name == "model/wte" && has_lm_head == false) {
|
||||
memcpy(model->lm_head->data, tensor->data, ggml_nbytes(tensor));
|
||||
}
|
||||
|
||||
if (name == "model/lm_head") {
|
||||
has_lm_head = true;
|
||||
}
|
||||
|
||||
total_size += ggml_nbytes(tensor);
|
||||
}
|
||||
|
||||
printf("%s: model size = %8.2f MB\n", __func__, total_size/1024.0/1024.0);
|
||||
}
|
||||
|
||||
fin.close();
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
std::stringstream StarcoderModel::predict(std::string prompt, int max_length, bool include_prompt) {
|
||||
|
||||
std::stringstream result;
|
||||
// tokenize the prompt
|
||||
std::vector<gpt_vocab::id> embd_inp = ::gpt_tokenize((*vocab), prompt);
|
||||
|
||||
int n_past = 0;
|
||||
|
||||
int64_t t_sample_us = 0;
|
||||
int64_t t_predict_us = 0;
|
||||
|
||||
int n_predict = std::min(max_length, model->hparams.n_ctx - (int) embd_inp.size());
|
||||
|
||||
spdlog::debug("{}: number of tokens in prompt = {}", __func__, embd_inp.size());
|
||||
|
||||
std::vector<gpt_vocab::id> embd;
|
||||
|
||||
// determine the required inference memory per token:
|
||||
size_t mem_per_token = 0;
|
||||
|
||||
std::vector<float> logits;
|
||||
|
||||
starcoder_eval((*model), config.n_threads, 0, { 0, 1, 2, 3 }, logits, mem_per_token);
|
||||
|
||||
for (int i = embd.size(); i < embd_inp.size() + n_predict; i++) {
|
||||
// predict
|
||||
if (embd.size() > 0) {
|
||||
const int64_t t_start_us = ggml_time_us();
|
||||
|
||||
if (!starcoder_eval((*model), config.n_threads, n_past, embd, logits, mem_per_token)) {
|
||||
throw std::runtime_error("Failed to predict");
|
||||
}
|
||||
|
||||
t_predict_us += ggml_time_us() - t_start_us;
|
||||
}
|
||||
|
||||
n_past += embd.size();
|
||||
embd.clear();
|
||||
|
||||
if (i >= embd_inp.size()) {
|
||||
// sample next token
|
||||
const int top_k = config.top_k;
|
||||
const float top_p = config.top_p;
|
||||
const float temp = config.temp;
|
||||
|
||||
const int n_vocab = model->hparams.n_vocab;
|
||||
|
||||
gpt_vocab::id id = 0;
|
||||
|
||||
{
|
||||
const int64_t t_start_sample_us = ggml_time_us();
|
||||
|
||||
id = gpt_sample_top_k_top_p((*vocab), logits.data() + (logits.size() - n_vocab), top_k, top_p, temp, rng);
|
||||
|
||||
t_sample_us += ggml_time_us() - t_start_sample_us;
|
||||
}
|
||||
|
||||
// add it to the context
|
||||
embd.push_back(id);
|
||||
|
||||
if(id != 50256){
|
||||
result << vocab->id_to_token[id].c_str();
|
||||
}
|
||||
|
||||
} else {
|
||||
// if here, it means we are still processing the input prompt
|
||||
for (int k = i; k < embd_inp.size(); k++) {
|
||||
embd.push_back(embd_inp[k]);
|
||||
|
||||
if(include_prompt){
|
||||
result << vocab->id_to_token[embd_inp[k]].c_str();
|
||||
}
|
||||
|
||||
if (embd.size() > config.n_batch) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
i += embd.size() - 1;
|
||||
}
|
||||
|
||||
// end of text token
|
||||
if (embd.back() == 50256) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user