#include "arg.h"
#include "common.h"
#include "log.h"
#include "ngram-cache.h"
#include "llama.h"
#include "ggml.h"
#include <cinttypes>
#include <clocale>
#include <cstdint>
#include <cstdio>
#include <fstream>
#include <string>
#include <vector>
int main(int argc, char ** argv){
std::setlocale(LC_NUMERIC, "C");
common_params params;
common_init();
if (!common_params_parse(argc, argv, params, LLAMA_EXAMPLE_LOOKUP)) {
return 1;
}
const int n_draft = params.speculative.draft.n_max;
// init llama.cpp
llama_backend_init();
llama_numa_init(params.numa);
// load the model
auto llama_init = common_init_from_params(params);
llama_context * ctx = llama_init->context();
// tokenize the prompt
std::vector<llama_token> inp;
inp = common_tokenize(ctx, params.prompt, true, true);
common_ngram_cache ngram_cache_context;
common_ngram_cache ngram_cache_dynamic;
common_ngram_cache ngram_cache_static;
int64_t t_draft_flat_us = 0;
int64_t t_draft_us = 0;
{
const int64_t t_start_draft_us = ggml_time_us();
if (!params.speculative.ngram_cache.lookup_cache_static.empty()) {
try {
ngram_cache_static = common_ngram_cache_load(params.speculative.ngram_cache.lookup_cache_static);
} catch (std::ifstream::failure const &) {
LOG_ERR("failed to open static lookup cache: %s", params.speculative.ngram_cache.lookup_cache_static.c_str());
exit(1);
}
}
if (!params.speculative.ngram_cache.lookup_cache_dynamic.empty()) {
try {
ngram_cache_dynamic = common_ngram_cache_load(params.speculative.ngram_cache.lookup_cache_dynamic);
} catch (std::ifstream::failure const &) {} // if the file does not exist it will simply be created at the end of the program
}
t_draft_flat_us += ggml_time_us() - t_start_draft_us;
}
const int n_input = inp.size();
const int n_ctx = llama_n_ctx(ctx);
int n_drafted = 0;
int n_accept = 0;
const int64_t t_start_ms = ggml_time_ms();
// Iterate over input tokens in chunks of size n_ctx.
// Each chunk is treated as if a sequential generation but with pre-determined tokens to ensure reproducibility.
for (int i_start = 0; i_start + n_ctx < n_input; i_start += n_ctx) {
const std::vector<llama_token> inp_slice(inp.begin() + i_start, inp.begin() + i_start + n_ctx);
std::vector<llama_token> pseudo_output;
pseudo_output.push_back(inp_slice[0]);
while ((int) pseudo_output.size() < n_ctx) {
// Simulate drafting and decoding from draft:
std::vector<llama_token> draft;
draft.push_back(pseudo_output.back());
{
const int64_t t_start_draft_us = ggml_time_us();
common_ngram_cache_draft(pseudo_output, draft, n_draft, LLAMA_NGRAM_MIN, LLAMA_NGRAM_MAX, ngram_cache_context, ngram_cache_dynamic, ngram_cache_static);
t_draft_us += ggml_time_us() - t_start_draft_us;
}
n_drafted += draft.size() - 1;
for (size_t j = 1; j < draft.size() && (int) pseudo_output.size() < n_ctx; ++j) {
const llama_token ground_truth = inp_slice[pseudo_output.size()];
const llama_token drafted = draft[j];
if (ground_truth != drafted) {
break;
}
++n_accept;
pseudo_output.push_back(ground_truth);
{
const int64_t t_start_draft_us = ggml_time_us();
common_ngram_cache_update(ngram_cache_context, LLAMA_NGRAM_MIN, LLAMA_NGRAM_MAX, pseudo_output, 1, false);
t_draft_us += ggml_time_us() - t_start_draft_us;
}
}
// After each simulated batch decoding simulate the sampling of a single token:
if ((int) pseudo_output.size() < n_ctx) {
pseudo_output.push_back(inp_slice[pseudo_output.size()]);
{
const int64_t t_start_draft_us = ggml_time_us();
common_ngram_cache_update(ngram_cache_context, LLAMA_NGRAM_MIN, LLAMA_NGRAM_MAX, pseudo_output, 1, false);
t_draft_us += ggml_time_us() - t_start_draft_us;
}
}
draft.erase(draft.begin());
}
if (i_start > 0 && i_start / 100000 != (i_start - n_ctx) / 100000) {
const int64_t t_now_ms = ggml_time_ms();
const int64_t eta_ms = (n_input - i_start) * (t_now_ms - t_start_ms) / i_start;
const int64_t eta_min = eta_ms / (60*1000);
const int64_t eta_s = (eta_ms - 60*1000*eta_min) / 1000;
LOG_INF("lookup-stats: %d/%d done, ETA: %02" PRId64 ":%02" PRId64 "\n", i_start, n_input, eta_min, eta_s);
}
// After each chunk, update the dynamic ngram cache with the context ngram cache:
common_ngram_cache_merge(ngram_cache_dynamic, ngram_cache_context);
ngram_cache_context.clear();
}
LOG("\n");
LOG_INF("\n");
LOG_INF("n_draft = %d\n", n_draft);
LOG_INF("n_predict = %d\n", n_input - n_input % n_ctx);
LOG_INF("n_drafted = %d\n", n_drafted);
LOG_INF("t_draft_flat = %.2f ms\n", t_draft_flat_us*1e-3);
LOG_INF("t_draft = %.2f ms, %.2f us per token, %.2f tokens per second\n",
t_draft_us*1e-3, 1.0f*t_draft_us/n_drafted, n_drafted/(1e-6*t_draft_us));
LOG_INF("n_accept = %d\n", n_accept);
LOG_INF("accept = %.3f%%\n", 100.0f * n_accept / n_drafted);
llama_backend_free();
LOG("\n\n");
return 0;
}