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backend: dedupe tokenizing code in gptj/mpt

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This commit is contained in:
Aaron Miller 2023-05-15 17:30:45 -07:00 committed by AT
parent 4cd8bdf9a1
commit 6182026c70
3 changed files with 57 additions and 121 deletions
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130
gpt4all-backend/mpt.cpp
View File

@ -1,6 +1,8 @@
#include "mpt.h"
#include "llama.cpp/ggml.h"
#include "utils.h"
#include <cassert>
#include <cmath>
#include <cstdio>
@ -136,26 +138,8 @@ static bool kv_cache_init(
return true;
}
struct mpt_vocab {
using id = int32_t;
using token = std::string;
std::map<token, id> token_to_id;
std::map<id, token> id_to_token;
std::vector<std::string> special_tokens;
void add_special_token(const std::string &token) {
special_tokens.push_back(token);
}
};
std::string regex_escape(const std::string &s) {
static const std::regex metacharacters(R"([\.\^\$\-\+\(\)\[\]\{\}\|\?\*])");
return std::regex_replace(s, metacharacters, "\\$&");
}
// load the model's weights from a stream
bool mpt_model_load(const std::string &fname, std::istream &fin, mpt_model & model, mpt_vocab & vocab) {
bool mpt_model_load(const std::string &fname, std::istream &fin, mpt_model & model, gpt_vocab & vocab) {
printf("%s: loading model from '%s' - please wait ...\n", __func__, fname.c_str());
// verify magic
@ -219,8 +203,6 @@ bool mpt_model_load(const std::string &fname, std::istream &fin, mpt_model & mod
vocab.id_to_token[i] = word;
}
// TODO: this only kind-of works, the gpt_tokenize can still incorrectly
// tokenize special tokens
if(special) {
vocab.add_special_token(word);
}
@ -436,7 +418,7 @@ bool mpt_model_load(const std::string &fname, std::istream &fin, mpt_model & mod
}
// load the model's weights from a file path
bool mpt_model_load(const std::string & fname, mpt_model & model, mpt_vocab & vocab) {
bool mpt_model_load(const std::string & fname, mpt_model & model, gpt_vocab & vocab) {
auto fin = std::ifstream(fname, std::ios::binary);
if (!fin) {
@ -647,98 +629,6 @@ bool mpt_eval(
return true;
}
std::vector<int> mpt_tokenize_inner(const mpt_vocab & vocab, const std::string & text) {
// taken from stablelm example in ggml
// they both use the gpt-neox tokenizer
// not sure if this entirely right?
std::vector<std::string> words;
// first split the text into words
{
std::string str = text;
std::string pat = R"('s|'t|'re|'ve|'m|'ll|'d| ?[[:alpha:]]+| ?[[:digit:]]+| ?[^\s[:alpha:][:digit:]]+|\s+(?!\S)|\s+)";
std::regex re(pat);
std::smatch m;
while (std::regex_search(str, m, re)) {
for (auto x : m) {
words.push_back(x);
}
str = m.suffix();
}
}
// find the longest tokens that form the words:
std::vector<mpt_vocab::id> tokens;
for (const auto & word : words) {
if (word.size() == 0) continue;
int i = 0;
int n = word.size();
while (i < n) {
int j = n;
while (j > i) {
auto it = vocab.token_to_id.find(word.substr(i, j-i));
if (it != vocab.token_to_id.end()) {
tokens.push_back(it->second);
i = j;
break;
}
--j;
}
if (i == n) {
break;
}
if (j == i) {
auto sub = word.substr(i, 1);
if (vocab.token_to_id.find(sub) != vocab.token_to_id.end()) {
tokens.push_back(vocab.token_to_id.at(sub));
} else {
fprintf(stderr, "%s: unknown token '%s'\n", __func__, sub.data());
}
++i;
}
}
}
return tokens;
}
std::vector<mpt_vocab::id> mpt_tokenize(const mpt_vocab & vocab, const std::string & text) {
// Generate the subpattern from the special_tokens vector if it's not empty
if (!vocab.special_tokens.empty()) {
std::vector<mpt_vocab::id> out;
std::vector<std::string> chunks;
std::string str = text;
std::string special_tokens_subpattern;
for (const auto &token : vocab.special_tokens) {
if (!special_tokens_subpattern.empty()) {
special_tokens_subpattern += "|";
}
special_tokens_subpattern += regex_escape(token);
}
std::regex re(special_tokens_subpattern);
std::smatch m;
while (std::regex_search(str, m, re)) {
auto tok = vocab.token_to_id.find(m.str());
if (tok != vocab.token_to_id.end()) {
auto tokid = tok->second;
auto pfxtoks = mpt_tokenize_inner(vocab, m.prefix());
out.insert(out.end(), pfxtoks.begin(), pfxtoks.end());
out.push_back(tokid);
str = m.suffix();
}
}
if (!str.empty()) {
auto tokrest = mpt_tokenize_inner(vocab, str);
out.insert(out.end(), tokrest.begin(), tokrest.end());
}
return out;
} else {
return mpt_tokenize_inner(vocab, text);
}
}
#define MPT_MAX_RNG_STATE 64*1024
@ -801,8 +691,8 @@ size_t mpt_copy_state_data(const mpt_model &model, const std::mt19937 &rng, uint
return written;
}
mpt_vocab::id mpt_sample_top_k_top_p(
const mpt_vocab & vocab,
gpt_vocab::id mpt_sample_top_k_top_p(
const gpt_vocab & vocab,
const size_t actualVocabSize,
const int32_t * last_n_tokens_data,
int last_n_tokens_size,
@ -817,7 +707,7 @@ mpt_vocab::id mpt_sample_top_k_top_p(
const auto last_n_tokens = std::vector<int32_t>(last_n_tokens_data, last_n_tokens_data + last_n_tokens_size);
const auto * plogits = logits.data() + logits.size() - n_logits;
std::vector<std::pair<double, mpt_vocab::id>> logits_id;
std::vector<std::pair<double, gpt_vocab::id>> logits_id;
logits_id.reserve(n_logits);
{
@ -842,7 +732,7 @@ mpt_vocab::id mpt_sample_top_k_top_p(
std::partial_sort(
logits_id.begin(),
logits_id.begin() + top_k, logits_id.end(),
[](const std::pair<double, mpt_vocab::id> & a, const std::pair<double, mpt_vocab::id> & b) {
[](const std::pair<double, gpt_vocab::id> & a, const std::pair<double, gpt_vocab::id> & b) {
return a.first > b.first;
});
@ -952,7 +842,7 @@ size_t mpt_set_state_data(mpt_model *model, std::mt19937 *rng, const uint8_t *sr
struct MPTPrivate {
const std::string modelPath;
bool modelLoaded;
mpt_vocab vocab;
gpt_vocab vocab;
mpt_model *model = nullptr;
int64_t n_threads = 0;
size_t mem_per_token = 0;
@ -1037,7 +927,7 @@ void MPT::prompt(const std::string &prompt,
int64_t t_prompt_us = 0;
// tokenize the prompt
std::vector<int> embd_inp = mpt_tokenize(d_ptr->vocab, prompt);
std::vector<int> embd_inp = gpt_tokenize(d_ptr->vocab, prompt);
// save the context size
promptCtx.n_ctx = d_ptr->model->hparams.n_ctx;

43
gpt4all-backend/utils.cpp
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@ -102,7 +102,7 @@ std::map<std::string, int32_t> json_parse(const std::string & fname) {
return result;
}
std::vector<gpt_vocab::id> gpt_tokenize(const gpt_vocab & vocab, const std::string & text) {
std::vector<gpt_vocab::id> gpt_tokenize_inner(const gpt_vocab & vocab, const std::string & text) {
std::vector<std::string> words;
// first split the text into words
@ -157,6 +157,47 @@ std::vector<gpt_vocab::id> gpt_tokenize(const gpt_vocab & vocab, const std::stri
return tokens;
}
std::string regex_escape(const std::string &s) {
static const std::regex metacharacters(R"([\.\^\$\-\+\(\)\[\]\{\}\|\?\*])");
return std::regex_replace(s, metacharacters, "\\$&");
}
std::vector<gpt_vocab::id> gpt_tokenize(const gpt_vocab & vocab, const std::string & text) {
// Generate the subpattern from the special_tokens vector if it's not empty
if (!vocab.special_tokens.empty()) {
std::vector<gpt_vocab::id> out;
std::vector<std::string> chunks;
std::string str = text;
std::string special_tokens_subpattern;
for (const auto &token : vocab.special_tokens) {
if (!special_tokens_subpattern.empty()) {
special_tokens_subpattern += "|";
}
special_tokens_subpattern += regex_escape(token);
}
std::regex re(special_tokens_subpattern);
std::smatch m;
while (std::regex_search(str, m, re)) {
auto tok = vocab.token_to_id.find(m.str());
if (tok != vocab.token_to_id.end()) {
auto tokid = tok->second;
auto pfxtoks = gpt_tokenize_inner(vocab, m.prefix());
out.insert(out.end(), pfxtoks.begin(), pfxtoks.end());
out.push_back(tokid);
str = m.suffix();
}
}
if (!str.empty()) {
auto tokrest = gpt_tokenize_inner(vocab, str);
out.insert(out.end(), tokrest.begin(), tokrest.end());
}
return out;
} else {
return gpt_tokenize_inner(vocab, text);
}
}
bool gpt_vocab_init(const std::string & fname, gpt_vocab & vocab) {
printf("%s: loading vocab from '%s'\n", __func__, fname.c_str());

5
gpt4all-backend/utils.h
View File

@ -44,6 +44,11 @@ struct gpt_vocab {
std::map<token, id> token_to_id;
std::map<id, token> id_to_token;
std::vector<std::string> special_tokens;
void add_special_token(const std::string &token) {
special_tokens.push_back(token);
}
};
void replace(std::string & str, const std::string & needle, const std::string & replacement);