mirror of
https://github.com/ggml-org/llama.cpp.git
synced 2025-10-31 08:51:55 +00:00
1072 lines
40 KiB
C++
1072 lines
40 KiB
C++
#include "common.h"
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#include "llama.h"
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#include <cmath>
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#include <cstdio>
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#include <cstring>
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#include <ctime>
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#include <sstream>
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#include <thread>
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#include <mutex>
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#include <atomic>
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#include <vector>
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#include <array>
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#include <fstream>
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#include <sstream>
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#if defined(_MSC_VER)
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#pragma warning(disable: 4244 4267) // possible loss of data
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#endif
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struct results_perplexity {
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std::vector<llama_token> tokens;
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double ppl_value;
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std::vector<float> logits;
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std::vector<float> probs;
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};
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struct results_log_softmax {
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double log_softmax;
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float logit;
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float prob;
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};
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static void write_logfile(
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const llama_context * ctx, const gpt_params & params, const llama_model * model,
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const struct results_perplexity & results
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) {
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if (params.logdir.empty()) {
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return;
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}
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if (params.hellaswag) {
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fprintf(stderr, "%s: warning: logging results is not implemented for HellaSwag. No files will be written.\n", __func__);
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return;
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}
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const std::string timestamp = get_sortable_timestamp();
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const bool success = create_directory_with_parents(params.logdir);
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if (!success) {
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fprintf(stderr, "%s: warning: failed to create logdir %s, cannot write logfile\n",
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__func__, params.logdir.c_str());
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return;
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}
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const std::string logfile_path = params.logdir + timestamp + ".yml";
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FILE * logfile = fopen(logfile_path.c_str(), "w");
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if (logfile == NULL) {
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fprintf(stderr, "%s: failed to open logfile %s\n", __func__, logfile_path.c_str());
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return;
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}
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fprintf(logfile, "binary: main\n");
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char model_desc[128];
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llama_model_desc(model, model_desc, sizeof(model_desc));
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dump_non_result_info_yaml(logfile, params, ctx, timestamp, results.tokens, model_desc);
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fprintf(logfile, "\n");
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fprintf(logfile, "######################\n");
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fprintf(logfile, "# Perplexity Results #\n");
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fprintf(logfile, "######################\n");
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fprintf(logfile, "\n");
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dump_vector_float_yaml(logfile, "logits", results.logits);
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fprintf(logfile, "ppl_value: %f\n", results.ppl_value);
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dump_vector_float_yaml(logfile, "probs", results.probs);
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llama_dump_timing_info_yaml(logfile, ctx);
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fclose(logfile);
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}
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static std::vector<float> softmax(const std::vector<float>& logits) {
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std::vector<float> probs(logits.size());
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float max_logit = logits[0];
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for (float v : logits) {
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max_logit = std::max(max_logit, v);
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}
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double sum_exp = 0.0;
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for (size_t i = 0; i < logits.size(); i++) {
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// Subtract the maximum logit value from the current logit value for numerical stability
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const float logit = logits[i] - max_logit;
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const float exp_logit = expf(logit);
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sum_exp += exp_logit;
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probs[i] = exp_logit;
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}
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for (size_t i = 0; i < probs.size(); i++) {
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probs[i] /= sum_exp;
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}
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return probs;
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}
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static results_log_softmax log_softmax(int n_vocab, const float * logits, int tok) {
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float max_logit = logits[0];
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for (int i = 1; i < n_vocab; ++i) {
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max_logit = std::max(max_logit, logits[i]);
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}
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double sum_exp = 0.0;
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for (int i = 0; i < n_vocab; ++i) {
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sum_exp += expf(logits[i] - max_logit);
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}
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return {logits[tok] - max_logit - log(sum_exp), logits[tok], expf(logits[tok] - max_logit) / (float) sum_exp};
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}
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static void process_logits(
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int n_vocab, const float * logits, const int * tokens, int n_token, std::vector<std::thread> & workers,
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double & nll, double & nll2, float * logit_history, float * prob_history
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) {
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std::mutex mutex;
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int counter = 0;
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auto compute = [&mutex, &counter, &nll, &nll2, logit_history, prob_history, n_vocab, logits, tokens, n_token] () {
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double local_nll = 0;
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double local_nll2 = 0;
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while (true) {
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std::unique_lock<std::mutex> lock(mutex);
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int i = counter++;
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if (i >= n_token) {
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nll += local_nll; nll2 += local_nll2;
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break;
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}
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lock.unlock();
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const results_log_softmax results = log_softmax(n_vocab, logits + i*n_vocab, tokens[i+1]);
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const double v = -results.log_softmax;
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local_nll += v;
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local_nll2 += v*v;
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logit_history[i] = results.logit;
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prob_history[i] = results.prob;
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}
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};
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for (auto & w : workers) {
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w = std::thread(compute);
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}
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compute();
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for (auto & w : workers) {
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w.join();
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}
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}
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static results_perplexity perplexity_v2(llama_context * ctx, const gpt_params & params) {
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// Download: https://s3.amazonaws.com/research.metamind.io/wikitext/wikitext-2-raw-v1.zip?ref=salesforce-research
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// Run `./perplexity -m models/7B/ggml-model-q4_0.bin -f wiki.test.raw`
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// Output: `perplexity: 13.5106 [114/114]`
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// BOS tokens will be added for each chunk before eval
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const bool add_bos = llama_should_add_bos_token(llama_get_model(ctx));
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fprintf(stderr, "%s: tokenizing the input ..\n", __func__);
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std::vector<llama_token> tokens = ::llama_tokenize(ctx, params.prompt, add_bos);
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const int n_ctx = llama_n_ctx(ctx);
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if (int(tokens.size()) < 2*n_ctx) {
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fprintf(stderr, "%s: you need at least %d tokens to evaluate perplexity with a context of %d\n",__func__,2*n_ctx,
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n_ctx);
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fprintf(stderr, "%s: the data file you provided tokenizes to only %zu tokens\n",__func__,tokens.size());
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return {std::move(tokens), 0., {}, {}};
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}
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std::vector<float> logit_history;
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std::vector<float> prob_history;
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logit_history.resize(tokens.size());
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prob_history.resize(tokens.size());
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if (params.ppl_stride <= 0) {
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fprintf(stderr, "%s: stride is %d but must be greater than zero!\n",__func__,params.ppl_stride);
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return {tokens, -1, logit_history, prob_history};
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}
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const int calc_chunk = n_ctx;
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fprintf(stderr, "%s: have %zu tokens. Calculation chunk = %d\n", __func__, tokens.size(), calc_chunk);
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if (int(tokens.size()) <= calc_chunk) {
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fprintf(stderr, "%s: there are only %zu tokens, this is not enough for a context size of %d and stride %d\n",__func__,
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tokens.size(), n_ctx, params.ppl_stride);
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return {tokens, -1, logit_history, prob_history};
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}
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const int n_chunk_max = (tokens.size() - calc_chunk + params.ppl_stride - 1) / params.ppl_stride;
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const int n_chunk = params.n_chunks < 0 ? n_chunk_max : std::min(params.n_chunks, n_chunk_max);
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const int n_vocab = llama_n_vocab(llama_get_model(ctx));
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const int n_batch = params.n_batch;
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int count = 0;
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double nll = 0.0;
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fprintf(stderr, "%s: calculating perplexity over %d chunks, batch_size=%d\n", __func__, n_chunk, n_batch);
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for (int i = 0; i < n_chunk; ++i) {
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const int start = i * params.ppl_stride;
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const int end = start + calc_chunk;
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const int num_batches = (calc_chunk + n_batch - 1) / n_batch;
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//fprintf(stderr, "%s: evaluating %d...%d using %d batches\n", __func__, start, end, num_batches);
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std::vector<float> logits;
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const auto t_start = std::chrono::high_resolution_clock::now();
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// clear the KV cache
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llama_kv_cache_clear(ctx);
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for (int j = 0; j < num_batches; ++j) {
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const int batch_start = start + j * n_batch;
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const int batch_size = std::min(end - batch_start, n_batch);
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//fprintf(stderr, " Batch %d: starts at %d, size is %d, n_past is %d\n",j,batch_start,batch_size,j * n_batch);
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if (llama_decode(ctx, llama_batch_get_one(tokens.data() + batch_start, batch_size, j * n_batch, 0))) {
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//fprintf(stderr, "%s : failed to eval\n", __func__);
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return {tokens, -1, logit_history, prob_history};
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}
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// save original token and restore it after eval
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const auto token_org = tokens[batch_start];
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// add BOS token for the first batch of each chunk
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if (add_bos && j == 0) {
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tokens[batch_start] = llama_token_bos(llama_get_model(ctx));
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}
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const auto batch_logits = llama_get_logits(ctx);
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logits.insert(logits.end(), batch_logits, batch_logits + batch_size * n_vocab);
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if (j == 0) {
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tokens[batch_start] = token_org;
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}
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}
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const auto t_end = std::chrono::high_resolution_clock::now();
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if (i == 0) {
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const float t_total = std::chrono::duration<float>(t_end - t_start).count();
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fprintf(stderr, "%s: %.2f seconds per pass - ETA ", __func__, t_total);
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int total_seconds = (int)(t_total * n_chunk);
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if (total_seconds >= 60*60) {
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fprintf(stderr, "%d hours ", total_seconds / (60*60));
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total_seconds = total_seconds % (60*60);
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}
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fprintf(stderr, "%.2f minutes\n", total_seconds / 60.0);
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}
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//fprintf(stderr, "%s: using tokens %d...%d\n",__func__,params.n_ctx - params.ppl_stride + start, params.n_ctx + start);
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for (int j = n_ctx - params.ppl_stride - 1; j < n_ctx - 1; ++j) {
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// Calculate probability of next token, given the previous ones.
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const std::vector<float> tok_logits(
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logits.begin() + (j + 0) * n_vocab,
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logits.begin() + (j + 1) * n_vocab);
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const float prob = softmax(tok_logits)[tokens[start + j + 1]];
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logit_history[start + j + 1] = tok_logits[tokens[start + j + 1]];
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prob_history[start + j + 1] = prob;
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nll += -std::log(prob);
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++count;
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}
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// perplexity is e^(average negative log-likelihood)
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if (params.ppl_output_type == 0) {
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printf("[%d]%.4lf,", i + 1, std::exp(nll / count));
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} else {
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printf("%8d %.4lf\n", i*params.ppl_stride, std::exp(nll / count));
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}
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fflush(stdout);
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}
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printf("\n");
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return {tokens, std::exp(nll / count), logit_history, prob_history};
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}
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static results_perplexity perplexity(llama_context * ctx, const gpt_params & params) {
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if (params.ppl_stride > 0) {
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return perplexity_v2(ctx, params);
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}
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// Download: https://s3.amazonaws.com/research.metamind.io/wikitext/wikitext-2-raw-v1.zip?ref=salesforce-research
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// Run `./perplexity -m models/7B/ggml-model-q4_0.bin -f wiki.test.raw`
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// Output: `perplexity: 13.5106 [114/114]`
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// BOS tokens will be added for each chunk before eval
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const bool add_bos = llama_should_add_bos_token(llama_get_model(ctx));
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const int n_ctx = llama_n_ctx(ctx);
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auto tim1 = std::chrono::high_resolution_clock::now();
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fprintf(stderr, "%s: tokenizing the input ..\n", __func__);
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std::vector<llama_token> tokens = ::llama_tokenize(ctx, params.prompt, add_bos);
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auto tim2 = std::chrono::high_resolution_clock::now();
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fprintf(stderr, "%s: tokenization took %g ms\n",__func__,1e-3*std::chrono::duration_cast<std::chrono::microseconds>(tim2-tim1).count());
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if (int(tokens.size()) < 2*n_ctx) {
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fprintf(stderr, "%s: you need at least %d tokens to evaluate perplexity with a context of %d\n",__func__,2*n_ctx,
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n_ctx);
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fprintf(stderr, "%s: the data file you provided tokenizes to only %zu tokens\n",__func__,tokens.size());
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return {std::move(tokens), 0., {}, {}};
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}
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std::vector<float> logit_history;
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logit_history.resize(tokens.size());
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std::vector<float> prob_history;
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prob_history.resize(tokens.size());
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const int n_chunk_max = tokens.size() / n_ctx;
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const int n_chunk = params.n_chunks < 0 ? n_chunk_max : std::min(params.n_chunks, n_chunk_max);
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const int n_vocab = llama_n_vocab(llama_get_model(ctx));
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const int n_batch = params.n_batch;
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int count = 0;
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double nll = 0.0;
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double nll2 = 0.0;
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fprintf(stderr, "%s: calculating perplexity over %d chunks, batch_size=%d\n", __func__, n_chunk, n_batch);
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std::vector<std::thread> workers(std::thread::hardware_concurrency() - 1);
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for (int i = 0; i < n_chunk; ++i) {
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const int start = i * n_ctx;
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const int end = start + n_ctx;
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const int num_batches = (n_ctx + n_batch - 1) / n_batch;
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std::vector<float> logits;
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const auto t_start = std::chrono::high_resolution_clock::now();
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// clear the KV cache
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llama_kv_cache_clear(ctx);
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for (int j = 0; j < num_batches; ++j) {
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const int batch_start = start + j * n_batch;
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const int batch_size = std::min(end - batch_start, n_batch);
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// save original token and restore it after eval
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const auto token_org = tokens[batch_start];
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// add BOS token for the first batch of each chunk
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if (add_bos && j == 0) {
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tokens[batch_start] = llama_token_bos(llama_get_model(ctx));
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}
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if (llama_decode(ctx, llama_batch_get_one(tokens.data() + batch_start, batch_size, j * n_batch, 0))) {
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fprintf(stderr, "%s : failed to eval\n", __func__);
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return {tokens, -1, logit_history, prob_history};
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}
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// restore the original token in case it was set to BOS
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tokens[batch_start] = token_org;
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const auto * batch_logits = llama_get_logits(ctx);
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logits.insert(logits.end(), batch_logits, batch_logits + batch_size * n_vocab);
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}
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const auto t_end = std::chrono::high_resolution_clock::now();
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if (i == 0) {
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const float t_total = std::chrono::duration<float>(t_end - t_start).count();
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fprintf(stderr, "%s: %.2f seconds per pass - ETA ", __func__, t_total);
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int total_seconds = (int)(t_total * n_chunk);
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if (total_seconds >= 60*60) {
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fprintf(stderr, "%d hours ", total_seconds / (60*60));
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total_seconds = total_seconds % (60*60);
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}
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fprintf(stderr, "%.2f minutes\n", total_seconds / 60.0);
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}
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// We get the logits for all the tokens in the context window (params.n_ctx)
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// from llama_eval above. Now, based on https://huggingface.co/docs/transformers/perplexity,
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// calculate the perplexity over the last half of the window (so the model always has
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// some context to predict the token).
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//
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// We rely on the fact that attention in the forward pass only looks at previous
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// tokens here, so the logits returned for each token are an accurate representation
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// of what the model would have predicted at that point.
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//
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// Example, we have a context window of 512, we will compute perplexity for each of the
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// last 256 tokens. Then, we split the input up into context window size chunks to
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// process the entire prompt.
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const int first = n_ctx/2;
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process_logits(n_vocab, logits.data() + first*n_vocab, tokens.data() + start + first, n_ctx - 1 - first,
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workers, nll, nll2, logit_history.data() + start + first, prob_history.data() + start + first);
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count += n_ctx - first - 1;
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// perplexity is e^(average negative log-likelihood)
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if (params.ppl_output_type == 0) {
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printf("[%d]%.4lf,", i + 1, std::exp(nll / count));
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} else {
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double av = nll/count;
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double av2 = nll2/count - av*av;
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if (av2 > 0) av2 = sqrt(av2/(count-1));
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printf("%8d %.4lf %4lf %4lf\n", i*n_ctx, std::exp(nll / count), av, av2);
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}
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fflush(stdout);
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}
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printf("\n");
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nll2 /= count;
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nll /= count;
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const double ppl = exp(nll);
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nll2 -= nll * nll;
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if (nll2 > 0) {
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nll2 = sqrt(nll2/(count-1));
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printf("Final estimate: PPL = %.4lf +/- %.5lf\n", ppl, nll2*ppl);
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} else {
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printf("Unexpected negative standard deviation of log(prob)\n");
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}
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return {tokens, ppl, logit_history, prob_history};
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}
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static std::vector<float> evaluate_tokens(llama_context * ctx, std::vector<int> & tokens,
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int n_past, int n_batch, int n_vocab) {
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std::vector<float> result;
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result.reserve(tokens.size() * n_vocab);
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size_t n_chunk = (tokens.size() + n_batch - 1)/n_batch;
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for (size_t i_chunk = 0; i_chunk < n_chunk; ++i_chunk) {
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size_t n_tokens = tokens.size() - i_chunk * n_batch;
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n_tokens = std::min(n_tokens, size_t(n_batch));
|
|
llama_kv_cache_seq_rm(ctx, 0, n_past, -1);
|
|
if (llama_decode(ctx, llama_batch_get_one(tokens.data() + i_chunk * n_batch, n_tokens, n_past, 0))) {
|
|
fprintf(stderr, "%s : failed to eval\n", __func__);
|
|
return {};
|
|
}
|
|
|
|
const auto logits = llama_get_logits(ctx);
|
|
result.insert(result.end(), logits, logits + n_tokens * n_vocab);
|
|
|
|
n_past += n_tokens;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static void hellaswag_compute_logprobs(const float * batch_logits, int n_vocab, std::vector<std::thread>& workers,
|
|
const std::vector<std::pair<size_t, llama_token>>& eval_pairs, std::vector<float>& eval_results) {
|
|
constexpr int k_token_chunk = 4;
|
|
if (eval_results.size() != eval_pairs.size()) {
|
|
eval_results.resize(eval_pairs.size());
|
|
}
|
|
if (eval_pairs.empty()) return;
|
|
|
|
size_t max_threads = std::min((eval_pairs.size() + k_token_chunk - 1)/k_token_chunk, workers.size());
|
|
|
|
std::atomic<int> counter(0);
|
|
auto compute = [&counter, &eval_pairs, &eval_results, batch_logits, n_vocab] () {
|
|
float local_logprobs[k_token_chunk];
|
|
while (true) {
|
|
size_t first = counter.fetch_add(k_token_chunk, std::memory_order_relaxed);
|
|
if (first >= eval_results.size()) break;
|
|
size_t last = std::min(first + k_token_chunk, eval_results.size());
|
|
for (size_t i = first; i < last; ++i) {
|
|
auto logits = batch_logits + eval_pairs[i].first * n_vocab;
|
|
float max_logit = logits[0];
|
|
for (int j = 1; j < n_vocab; ++j) {
|
|
max_logit = std::max(max_logit, logits[j]);
|
|
}
|
|
float sum_p = 0.f;
|
|
for (int j = 0; j < n_vocab; ++j) {
|
|
sum_p += expf(logits[j] - max_logit);
|
|
}
|
|
local_logprobs[i - first] = logits[eval_pairs[i].second] - max_logit - std::log(sum_p);
|
|
}
|
|
std::memcpy(eval_results.data() + first, local_logprobs, (last - first)*sizeof(float));
|
|
}
|
|
};
|
|
|
|
for (size_t it = 0; it < max_threads; ++it) {
|
|
workers[it] = std::thread(compute);
|
|
}
|
|
for (size_t it = 0; it < max_threads; ++it) {
|
|
workers[it].join();
|
|
}
|
|
|
|
}
|
|
|
|
static void hellaswag_score(llama_context * ctx, const gpt_params & params) {
|
|
// Calculates hellaswag score (acc_norm) from prompt
|
|
//
|
|
// Data extracted from the HellaSwag validation dataset (MIT license) https://github.com/rowanz/hellaswag/blob/master/data/hellaswag_val.jsonl
|
|
// All used data fields are preprocessed as in https://github.com/EleutherAI/lm-evaluation-harness/blob/df3da98c5405deafd519c2ddca52bb7c3fe36bef/lm_eval/tasks/hellaswag.py#L62-L68
|
|
//
|
|
// All 10042 tasks should be extracted to keep the results standardized like other implementations.
|
|
//
|
|
// Datafile layout:
|
|
// ['??'] denotes json fields
|
|
// 6 lines per task:
|
|
// ['activity_label'] + ": " +['ctx'] - The first part of the query, the context
|
|
// ['label'] - The index the best common sense ending aka gold ending
|
|
// ['endings'][0] - Endings added to the first part of the query
|
|
// ['endings'][1]
|
|
// ['endings'][2]
|
|
// ['endings'][3]
|
|
|
|
std::vector<std::string> prompt_lines;
|
|
std::istringstream strstream(params.prompt);
|
|
std::string line;
|
|
|
|
while (std::getline(strstream,line,'\n')) {
|
|
prompt_lines.push_back(line);
|
|
}
|
|
|
|
if (prompt_lines.size() % 6 != 0) {
|
|
fprintf(stderr, "%s : number of lines in prompt not a multiple of 6.\n", __func__);
|
|
return;
|
|
}
|
|
|
|
size_t hs_task_count = prompt_lines.size()/6;
|
|
fprintf(stderr, "%s : loaded %zu tasks from prompt.\n", __func__, hs_task_count);
|
|
|
|
const bool is_spm = llama_vocab_type(llama_get_model(ctx)) == LLAMA_VOCAB_TYPE_SPM;
|
|
fprintf(stderr, "================================= is_spm = %d\n", is_spm);
|
|
|
|
// This is needed as usual for LLaMA models
|
|
const bool add_bos = llama_should_add_bos_token(llama_get_model(ctx));
|
|
|
|
// Number of tasks to use when computing the score
|
|
if (params.hellaswag_tasks < hs_task_count) {
|
|
hs_task_count = params.hellaswag_tasks;
|
|
}
|
|
|
|
// The tasks should be randomized so the score stabilizes quickly.
|
|
bool randomize_tasks = true;
|
|
|
|
// The random seed should not impact the final result if the computation is done over enough tasks, so kept hardcoded for now
|
|
std::mt19937 rng(1);
|
|
|
|
// Dataholder for hellaswag tasks
|
|
struct hs_data_t {
|
|
std::string context;
|
|
size_t gold_ending_idx;
|
|
std::string ending[4];
|
|
size_t ending_logprob_count[4];
|
|
double ending_logprob[4];
|
|
|
|
size_t i_batch; // starting index in the llama_batch
|
|
size_t common_prefix; // max number of initial tokens that are the same in all sentences
|
|
size_t required_tokens; // needed number of tokens to evaluate all 4 endings
|
|
std::vector<llama_token> seq_tokens[4];
|
|
};
|
|
|
|
fprintf(stderr, "%s : selecting %zu %s tasks.\n", __func__, hs_task_count, (randomize_tasks?"randomized":"the first") );
|
|
|
|
// Select and read data from prompt lines
|
|
std::vector<hs_data_t> hs_data(hs_task_count);
|
|
for (size_t i = 0; i < hs_task_count; i++) {
|
|
size_t idx = i;
|
|
|
|
auto & hs_cur = hs_data[i];
|
|
|
|
// Select a random example of those left in the prompt
|
|
if (randomize_tasks) {
|
|
std::uniform_int_distribution<size_t> dist(0, prompt_lines.size()/6-1 ) ;
|
|
idx = dist(rng);
|
|
}
|
|
|
|
hs_cur.context = prompt_lines[idx*6];
|
|
hs_cur.gold_ending_idx = std::stoi( prompt_lines[idx*6+1] );
|
|
for (size_t j = 0; j < 4; j++) {
|
|
hs_cur.ending[j] = prompt_lines[idx*6+2+j];
|
|
hs_cur.seq_tokens[j] = ::llama_tokenize(ctx, hs_cur.context + " " + hs_cur.ending[j], add_bos);
|
|
}
|
|
|
|
// determine the common prefix of the endings
|
|
hs_cur.common_prefix = 0;
|
|
hs_cur.required_tokens = 0;
|
|
for (size_t k = 0; k < hs_cur.seq_tokens[0].size(); k++) {
|
|
if (hs_cur.seq_tokens[0][k] != hs_cur.seq_tokens[1][k] ||
|
|
hs_cur.seq_tokens[0][k] != hs_cur.seq_tokens[2][k] ||
|
|
hs_cur.seq_tokens[0][k] != hs_cur.seq_tokens[3][k]) {
|
|
break;
|
|
}
|
|
hs_cur.common_prefix++;
|
|
}
|
|
hs_cur.required_tokens = hs_cur.common_prefix +
|
|
hs_cur.seq_tokens[0].size() - hs_cur.common_prefix +
|
|
hs_cur.seq_tokens[1].size() - hs_cur.common_prefix +
|
|
hs_cur.seq_tokens[2].size() - hs_cur.common_prefix +
|
|
hs_cur.seq_tokens[3].size() - hs_cur.common_prefix;
|
|
|
|
//GGML_ASSERT(hs_cur.common_prefix >= ::llama_tokenize(ctx, hs_cur.context, add_bos).size());
|
|
|
|
// Delete the selected random example from the prompt
|
|
if (randomize_tasks) {
|
|
prompt_lines.erase( std::next(prompt_lines.begin(),idx*6) , std::next(prompt_lines.begin(),idx*6+6) );
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, "%s : calculating hellaswag score over selected tasks.\n", __func__);
|
|
|
|
printf("\ntask\tacc_norm\n");
|
|
|
|
double acc = 0.0f;
|
|
|
|
const int n_vocab = llama_n_vocab(llama_get_model(ctx));
|
|
const int n_ctx = llama_n_ctx(ctx);
|
|
const int n_batch = params.n_batch;
|
|
|
|
const int max_tasks_per_batch = params.n_parallel;
|
|
const int max_seq = 4*max_tasks_per_batch;
|
|
|
|
llama_batch batch = llama_batch_init(n_ctx, 0, max_seq);
|
|
|
|
std::vector<float> tok_logits(n_vocab);
|
|
std::vector<float> batch_logits(n_ctx*n_vocab);
|
|
|
|
std::vector<std::pair<size_t, llama_token>> eval_pairs;
|
|
std::vector<float> eval_results;
|
|
std::vector<std::thread> workers(std::thread::hardware_concurrency());
|
|
|
|
auto decode_helper = [&](llama_context * ctx, llama_batch & batch, int32_t n_batch) {
|
|
for (int32_t i = 0; i < (int32_t) batch.n_tokens; i += n_batch) {
|
|
const int32_t n_tokens = std::min(n_batch, (int32_t) (batch.n_tokens - i));
|
|
|
|
llama_batch batch_view = {
|
|
n_tokens,
|
|
batch.token + i,
|
|
nullptr,
|
|
batch.pos + i,
|
|
batch.n_seq_id + i,
|
|
batch.seq_id + i,
|
|
batch.logits + i,
|
|
0, 0, 0, // unused
|
|
};
|
|
|
|
const int ret = llama_decode(ctx, batch_view);
|
|
if (ret != 0) {
|
|
LOG_TEE("failed to decode the batch, n_batch = %d, ret = %d\n", n_batch, ret);
|
|
return false;
|
|
}
|
|
|
|
memcpy(batch_logits.data() + i*n_vocab, llama_get_logits(ctx), n_tokens*n_vocab*sizeof(float));
|
|
}
|
|
|
|
return true;
|
|
};
|
|
|
|
for (size_t i0 = 0; i0 < hs_task_count; i0++) {
|
|
int n_cur = 0;
|
|
|
|
size_t i1 = i0;
|
|
size_t i_batch = 0; // this tells us where in `llama_batch` we are currently
|
|
|
|
llama_batch_clear(batch);
|
|
|
|
// batch as much tasks as possible into the available context
|
|
// each task has 4 unique seuqnce ids - one for each ending
|
|
// the common prefix is shared among the 4 sequences to save tokens
|
|
// we extract logits only from the last common token and from all ending tokens of each sequence
|
|
while (n_cur + (int) hs_data[i1].required_tokens <= n_ctx) {
|
|
auto & hs_cur = hs_data[i1];
|
|
|
|
const int s0 = 4*(i1 - i0);
|
|
if (s0 + 4 > max_seq) {
|
|
break;
|
|
}
|
|
|
|
for (size_t i = 0; i < hs_cur.common_prefix; ++i) {
|
|
llama_batch_add(batch, hs_cur.seq_tokens[0][i], i, { s0 + 0, s0 + 1, s0 + 2, s0 + 3}, false);
|
|
}
|
|
batch.logits[batch.n_tokens - 1] = true; // we need logits for the last token of the common prefix
|
|
|
|
for (int s = 0; s < 4; ++s) {
|
|
for (size_t i = hs_cur.common_prefix; i < hs_cur.seq_tokens[s].size(); ++i) {
|
|
llama_batch_add(batch, hs_cur.seq_tokens[s][i], i, { s0 + s }, true);
|
|
}
|
|
}
|
|
|
|
hs_cur.i_batch = i_batch;
|
|
i_batch += hs_cur.required_tokens;
|
|
|
|
n_cur += hs_data[i1].required_tokens;
|
|
if (++i1 == hs_task_count) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i0 == i1) {
|
|
fprintf(stderr, "%s : task %zu does not fit in the context window\n", __func__, i0);
|
|
return;
|
|
}
|
|
|
|
llama_kv_cache_clear(ctx);
|
|
|
|
// decode all tasks [i0, i1)
|
|
if (!decode_helper(ctx, batch, n_batch)) {
|
|
fprintf(stderr, "%s: llama_decode() failed\n", __func__);
|
|
return;
|
|
}
|
|
|
|
// Compute log-probs in parallel
|
|
// First we collect all tasks
|
|
eval_pairs.clear();
|
|
for (size_t i = i0; i < i1; ++i) {
|
|
auto & hs_cur = hs_data[i];
|
|
size_t li = hs_cur.common_prefix;
|
|
for (int s = 0; s < 4; ++s) {
|
|
for (size_t j = hs_cur.common_prefix; j < hs_cur.seq_tokens[s].size() - 1; j++) {
|
|
eval_pairs.push_back(std::make_pair(hs_cur.i_batch + li++, hs_cur.seq_tokens[s][j + 1]));
|
|
}
|
|
++li;
|
|
}
|
|
}
|
|
// Then we do the actual calculation
|
|
hellaswag_compute_logprobs(batch_logits.data(), n_vocab, workers, eval_pairs, eval_results);
|
|
|
|
size_t ir = 0;
|
|
|
|
// compute the logprobs for each ending of the decoded tasks
|
|
for (size_t i = i0; i < i1; ++i) {
|
|
auto & hs_cur = hs_data[i];
|
|
|
|
std::memcpy(tok_logits.data(), batch_logits.data() + n_vocab*(hs_cur.i_batch + hs_cur.common_prefix - 1), n_vocab*sizeof(float));
|
|
|
|
const auto first_probs = softmax(tok_logits);
|
|
|
|
for (int s = 0; s < 4; ++s) {
|
|
hs_cur.ending_logprob_count[s] = 1;
|
|
hs_cur.ending_logprob[s] = std::log(first_probs[hs_cur.seq_tokens[s][hs_cur.common_prefix]]);
|
|
for (size_t j = hs_cur.common_prefix; j < hs_cur.seq_tokens[s].size() - 1; j++) {
|
|
hs_cur.ending_logprob[s] += eval_results[ir++];
|
|
hs_cur.ending_logprob_count[s]++;
|
|
}
|
|
hs_cur.ending_logprob[s] /= hs_cur.ending_logprob_count[s];
|
|
}
|
|
|
|
// Find the ending with maximum logprob
|
|
size_t ending_logprob_max_idx = 0;
|
|
double ending_logprob_max_val = hs_cur.ending_logprob[0];
|
|
for (size_t s = 1; s < 4; s++) {
|
|
if (hs_cur.ending_logprob[s] > ending_logprob_max_val) {
|
|
ending_logprob_max_idx = s;
|
|
ending_logprob_max_val = hs_cur.ending_logprob[s];
|
|
}
|
|
}
|
|
|
|
//printf("max logprob ending idx %lu, gold ending idx %lu\n", ending_logprob_max_idx, hs_cur.gold_ending_idx);
|
|
|
|
// If the gold ending got the maximum logprobe add one accuracy point
|
|
if (ending_logprob_max_idx == hs_cur.gold_ending_idx) {
|
|
acc += 1.0;
|
|
}
|
|
|
|
// Print the accumulated accuracy mean x 100
|
|
printf("%zu\t%.8lf\n", i + 1, acc/double(i + 1)*100.0);
|
|
fflush(stdout);
|
|
}
|
|
|
|
i0 = i1 - 1;
|
|
}
|
|
|
|
llama_batch_free(batch);
|
|
|
|
printf("\n");
|
|
}
|
|
|
|
struct winogrande_entry {
|
|
std::string first;
|
|
std::string second;
|
|
std::array<std::string, 2> choices;
|
|
int answer;
|
|
};
|
|
|
|
static std::vector<winogrande_entry> load_winogrande_from_csv(const std::string& prompt) {
|
|
std::vector<winogrande_entry> result;
|
|
std::istringstream in(prompt);
|
|
std::string line;
|
|
std::array<int, 4> comma_pos;
|
|
while (true) {
|
|
std::getline(in, line);
|
|
if (in.fail() || in.eof()) break;
|
|
int ipos = 0;
|
|
bool quote_open = false;
|
|
for (int i = 0; i < int(line.size()); ++i) {
|
|
if (!quote_open) {
|
|
if (line[i] == ',') {
|
|
comma_pos[ipos++] = i;
|
|
if (ipos == 4) break;
|
|
}
|
|
else if (line[i] == '"') {
|
|
quote_open = true;
|
|
}
|
|
}
|
|
else {
|
|
if (line[i] == '"') {
|
|
quote_open = false;
|
|
}
|
|
}
|
|
}
|
|
if (ipos != 4) {
|
|
printf("%s: failed to find comma separators in <%s>\n", __func__, line.c_str());
|
|
continue;
|
|
}
|
|
auto sentence = line[comma_pos[0]+1] == '"' ? line.substr(comma_pos[0]+2, comma_pos[1] - comma_pos[0] - 3)
|
|
: line.substr(comma_pos[0]+1, comma_pos[1] - comma_pos[0] - 1);
|
|
auto choice1 = line.substr(comma_pos[1]+1, comma_pos[2] - comma_pos[1] - 1);
|
|
auto choice2 = line.substr(comma_pos[2]+1, comma_pos[3] - comma_pos[2] - 1);
|
|
auto answer = line.substr(comma_pos[3]+1, line.size() - comma_pos[3] - 1);
|
|
auto index = line.substr(0, comma_pos[0]);
|
|
int where = 0;
|
|
for ( ; where < int(sentence.size()); ++where) {
|
|
if (sentence[where] == '_') break;
|
|
}
|
|
if (where == int(sentence.size())) {
|
|
printf("%s: no _ in <%s>\n", __func__, sentence.c_str());
|
|
continue;
|
|
}
|
|
std::istringstream stream(answer.c_str());
|
|
int i_answer; stream >> i_answer;
|
|
if (stream.fail() || i_answer < 1 || i_answer > 2) {
|
|
printf("%s: failed to parse answer <%s>\n", __func__, answer.c_str());
|
|
continue;
|
|
}
|
|
result.emplace_back();
|
|
auto& wg = result.back();
|
|
wg.first = sentence.substr(0, where);
|
|
wg.second = sentence.substr(where + 1, sentence.size() - where - 1);
|
|
wg.choices[0] = std::move(choice1);
|
|
wg.choices[1] = std::move(choice2);
|
|
wg.answer = i_answer;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Evaluates the Winogrande score.
|
|
* Uses a CSV containing task index, dentence, choice 1, choice 2, answer (1 or 2)
|
|
* You can get one such dataset from e.g. https://huggingface.co/datasets/ikawrakow/winogrande-eval-for-llama.cpp
|
|
* As an example, the 1st row in the above dataset is
|
|
*
|
|
* 0,Sarah was a much better surgeon than Maria so _ always got the easier cases.,Sarah,Maria,2
|
|
*
|
|
*/
|
|
static void winogrande_score(llama_context * ctx, const gpt_params & params) {
|
|
|
|
constexpr int k_min_trailing_ctx = 3;
|
|
|
|
auto data = load_winogrande_from_csv(params.prompt);
|
|
if (data.empty()) {
|
|
fprintf(stderr, "%s: no tasks\n", __func__);
|
|
return;
|
|
}
|
|
|
|
fprintf(stderr, "%s : loaded %zu tasks from prompt.\n", __func__, data.size());
|
|
|
|
if (params.winogrande_tasks > 0 && params.winogrande_tasks < data.size()) {
|
|
fprintf(stderr, "%s : selecting %zu random tasks\n", __func__, params.winogrande_tasks);
|
|
std::mt19937 rng(1);
|
|
std::vector<int> aux(data.size());
|
|
for (int i = 0; i < int(data.size()); ++i) {
|
|
aux[i] = i;
|
|
}
|
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float scale = 1/(1.f + (float)rng.max());
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std::vector<winogrande_entry> selected;
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selected.resize(params.winogrande_tasks);
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for (int i = 0; i < int(params.winogrande_tasks); ++i) {
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int j = int(scale*rng()*aux.size());
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selected[i] = std::move(data[aux[j]]);
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aux[j] = aux.back();
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aux.pop_back();
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}
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data = std::move(selected);
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}
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|
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// This is needed as usual for LLaMA models
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const bool add_bos = llama_should_add_bos_token(llama_get_model(ctx));
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|
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fprintf(stderr, "%s : calculating winogrande score over selected tasks.\n", __func__);
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|
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const int n_vocab = llama_n_vocab(llama_get_model(ctx));
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const int n_ctx = llama_n_ctx(ctx);
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|
|
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std::vector<float> tok_logits(n_vocab);
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|
|
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int n_correct = 0;
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|
int n_done = 0;
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|
|
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for (size_t task_idx = 0; task_idx < data.size(); task_idx++) {
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const auto& task = data[task_idx];
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|
|
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auto base_context = ::llama_tokenize(ctx, task.first, add_bos);
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auto base_ctx_1st = ::llama_tokenize(ctx, task.first + task.choices[0], add_bos);
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auto base_ctx_2nd = ::llama_tokenize(ctx, task.first + task.choices[1], add_bos);
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|
|
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auto sentence_1st = task.first + task.choices[0] + task.second;
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auto sentence_2nd = task.first + task.choices[1] + task.second;
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auto query_1st = ::llama_tokenize(ctx, sentence_1st, add_bos);
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auto query_2nd = ::llama_tokenize(ctx, sentence_2nd, add_bos);
|
|
|
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if (query_1st.size() > (size_t)n_ctx || query_2nd.size() > (size_t)n_ctx) {
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|
fprintf(stderr, "%s : number of tokens in queries %zu, %zu > n_ctxl\n", __func__, query_1st.size(), query_2nd.size());
|
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return;
|
|
}
|
|
|
|
auto query_1st_size = query_1st.size();
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|
auto query_2nd_size = query_2nd.size();
|
|
|
|
// Speedup small evaluations by evaluating atleast 32 tokens
|
|
// For Winogrande this seems to slow it down rather than speed it up.
|
|
//if (query_1st.size() < 32) query_1st.resize(32);
|
|
//if (query_2nd.size() < 32) query_2nd.resize(32);
|
|
|
|
llama_kv_cache_clear(ctx);
|
|
auto logits_1st = evaluate_tokens(ctx, query_1st, 0, params.n_batch, n_vocab);
|
|
|
|
llama_kv_cache_clear(ctx);
|
|
auto logits_2nd = evaluate_tokens(ctx, query_2nd, 0, params.n_batch, n_vocab);
|
|
|
|
if (logits_1st.empty() || logits_2nd.empty()) {
|
|
fprintf(stderr, "%s : failed to eval\n", __func__);
|
|
return;
|
|
}
|
|
|
|
bool skip_choice = query_1st_size - base_ctx_1st.size() > k_min_trailing_ctx &&
|
|
query_2nd_size - base_ctx_2nd.size() > k_min_trailing_ctx;
|
|
|
|
float score_1st = 0;
|
|
bool is_nan_1st = false;
|
|
const auto& base_1 = skip_choice ? base_ctx_1st : base_context;
|
|
const int last_1st = query_1st_size - base_1.size() > 1 ? 1 : 0;
|
|
for (size_t j = base_1.size()-1; j < query_1st_size-1-last_1st; ++j) {
|
|
std::memcpy(tok_logits.data(), logits_1st.data() + j*n_vocab, n_vocab*sizeof(float));
|
|
const float prob = softmax(tok_logits)[query_1st[j+1]];
|
|
if (std::isnan(prob) || !prob) {
|
|
fprintf(stderr, "%s: %g probability for token %zu when evaluating <%s>. Base context has %zu tokens\n", __func__,
|
|
prob, j, sentence_1st.c_str(), base_context.size());
|
|
is_nan_1st = true;
|
|
break;
|
|
}
|
|
score_1st += std::log(prob);
|
|
}
|
|
score_1st /= (query_1st_size - base_1.size() - last_1st);
|
|
|
|
float score_2nd = 0;
|
|
bool is_nan_2nd = false;
|
|
const auto& base_2 = skip_choice ? base_ctx_2nd : base_context;
|
|
const int last_2nd = query_2nd_size - base_2.size() > 1 ? 1 : 0;
|
|
for (size_t j = base_2.size()-1; j < query_2nd_size-1-last_2nd; ++j) {
|
|
std::memcpy(tok_logits.data(), logits_2nd.data() + j*n_vocab, n_vocab*sizeof(float));
|
|
const float prob = softmax(tok_logits)[query_2nd[j+1]];
|
|
if (std::isnan(prob) || !prob) {
|
|
fprintf(stderr, "%s: %g probability for token %zu when evaluating <%s>. Base context has %zu tokens\n", __func__,
|
|
prob, j, sentence_2nd.c_str(), base_context.size());
|
|
is_nan_2nd = true;
|
|
break;
|
|
}
|
|
score_2nd += std::log(prob);
|
|
}
|
|
score_2nd /= (query_2nd_size - base_2.size() - last_2nd);
|
|
|
|
if (is_nan_1st || is_nan_2nd) {
|
|
continue;
|
|
}
|
|
|
|
if (std::isnan(score_1st) || std::isnan(score_2nd)) {
|
|
printf("================== NaN score %g, %g) for:\n", score_1st, score_2nd);
|
|
printf("Q1: <%s> - %zu tokens\n", sentence_1st.c_str(), query_1st_size);
|
|
printf("Q2: <%s> - %zu tokens\n", sentence_2nd.c_str(), query_2nd_size);
|
|
printf("B : <%s> - %zu tokens\n", task.first.c_str(), base_context.size());
|
|
printf("base_1 has %zu tokens, base_2 has %zu tokens, skip_choice = %d\n", base_1.size(), base_2.size(), skip_choice);
|
|
continue;
|
|
}
|
|
|
|
int result = score_1st > score_2nd ? 1 : 2;
|
|
|
|
if (result == task.answer) {
|
|
++n_correct;
|
|
}
|
|
++n_done;
|
|
|
|
// Print the accumulated accuracy mean x 100
|
|
printf("%zu\t%.4lf\t%10.6f %10.6f %d %d\n",task_idx+1, 100.0 * n_correct/n_done,score_1st,score_2nd,result,task.answer);
|
|
fflush(stdout);
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
if (n_done < 100) return;
|
|
|
|
const float p = 1.f*n_correct/n_done;
|
|
const float sigma = 100.f*sqrt(p*(1-p)/(n_done-1));
|
|
printf("Final Winogrande score(%d tasks): %.4lf +/- %.4lf\n", n_done, 100*p, sigma);
|
|
}
|
|
|
|
|
|
int main(int argc, char ** argv) {
|
|
gpt_params params;
|
|
|
|
params.n_batch = 512;
|
|
if (!gpt_params_parse(argc, argv, params)) {
|
|
return 1;
|
|
}
|
|
|
|
params.logits_all = true;
|
|
params.n_batch = std::min(params.n_batch, params.n_ctx);
|
|
|
|
if (params.ppl_stride > 0) {
|
|
fprintf(stderr, "Will perform strided perplexity calculation -> adjusting context size from %d to %d\n",
|
|
params.n_ctx, params.n_ctx + params.ppl_stride/2);
|
|
params.n_ctx += params.ppl_stride/2;
|
|
}
|
|
|
|
print_build_info();
|
|
|
|
if (params.seed == LLAMA_DEFAULT_SEED) {
|
|
params.seed = time(NULL);
|
|
}
|
|
|
|
fprintf(stderr, "%s: seed = %u\n", __func__, params.seed);
|
|
|
|
std::mt19937 rng(params.seed);
|
|
if (params.random_prompt) {
|
|
params.prompt = gpt_random_prompt(rng);
|
|
}
|
|
|
|
llama_backend_init(params.numa);
|
|
|
|
llama_model * model;
|
|
llama_context * ctx;
|
|
|
|
// load the model and apply lora adapter, if any
|
|
std::tie(model, ctx) = llama_init_from_gpt_params(params);
|
|
if (model == NULL) {
|
|
fprintf(stderr, "%s: error: unable to load model\n", __func__);
|
|
return 1;
|
|
}
|
|
|
|
const int n_ctx_train = llama_n_ctx_train(model);
|
|
if (params.n_ctx > n_ctx_train) {
|
|
fprintf(stderr, "%s: warning: model was trained on only %d context tokens (%d specified)\n",
|
|
__func__, n_ctx_train, params.n_ctx);
|
|
}
|
|
|
|
// print system information
|
|
{
|
|
fprintf(stderr, "\n");
|
|
fprintf(stderr, "%s\n", get_system_info(params).c_str());
|
|
}
|
|
|
|
struct results_perplexity results;
|
|
if (params.hellaswag) {
|
|
hellaswag_score(ctx, params);
|
|
} else if (params.winogrande) {
|
|
winogrande_score(ctx, params);
|
|
} else {
|
|
results = perplexity(ctx, params);
|
|
}
|
|
|
|
llama_print_timings(ctx);
|
|
write_logfile(ctx, params, model, results);
|
|
|
|
llama_free(ctx);
|
|
llama_free_model(model);
|
|
|
|
llama_backend_free();
|
|
|
|
return 0;
|
|
}
|