mirror of https://github.com/google/gemma.cpp.git
71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
#include <iostream>
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// copybara:import_next_line:gemma_cpp
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#include "compression/compress.h"
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// copybara:end
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// copybara:import_next_line:gemma_cpp
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#include "gemma.h" // Gemma
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// copybara:end
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// copybara:import_next_line:gemma_cpp
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#include "util/args.h" // HasHelp
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// copybara:end
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// copybara:import_next_line:gemma_cpp
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#include "configs.h"
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// copybara:end
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#include "hwy/base.h"
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#include "hwy/contrib/thread_pool/thread_pool.h"
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#include "hwy/highway.h"
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#include "hwy/per_target.h"
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#include "hwy/profiler.h"
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#include "hwy/timer.h"
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std::vector<int> tokenize(
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std::string prompt_string,
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const sentencepiece::SentencePieceProcessor* tokenizer) {
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prompt_string = "<start_of_turn>user\n" + prompt_string +
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"<end_of_turn>\n<start_of_turn>model\n";
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std::vector<int> tokens;
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HWY_ASSERT(tokenizer->Encode(prompt_string, &tokens).ok());
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tokens.insert(tokens.begin(), 2); // BOS token
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return tokens;
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}
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int main(int argc, char** argv) {
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gcpp::LoaderArgs loader(argc, argv);
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// A rough heuristic for a reasonable number of threads given hardware
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// concurrency estimate
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size_t num_threads = static_cast<size_t>(std::clamp(
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static_cast<int>(std::thread::hardware_concurrency()) - 2, 1, 18));
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hwy::ThreadPool pool(num_threads);
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hwy::ThreadPool inner_pool(0);
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gcpp::Gemma model(loader, pool);
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std::mt19937 gen;
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std::random_device rd;
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gen.seed(rd());
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std::vector<int> tokens =
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tokenize("Write a greeting to the world.", model.Tokenizer());
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size_t ntokens = tokens.size();
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size_t pos = 0;
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auto stream_token = [&pos, &gen, &ntokens, tokenizer = model.Tokenizer()](
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int token, float) {
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++pos;
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if (pos < ntokens) {
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// print feedback
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} else if (token != gcpp::EOS_ID) {
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std::string token_text;
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HWY_ASSERT(tokenizer->Decode(std::vector<int>{token}, &token_text).ok());
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if (pos == ntokens + 1) {
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// first token of response
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token_text.erase(0, token_text.find_first_not_of(" \t\n\n"));
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}
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std::cout << token_text << std::flush;
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}
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return true;
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};
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GenerateGemma(
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model, /*max_tokens=*/2048, /*max_generated_tokens=*/1024,
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/*temperature=*/1.0, tokens, 0, pool, inner_pool, stream_token,
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[](int) { return true; }, gen, 0);
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std::cout << std::endl;
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}
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