File size: 2,665 Bytes
055eba4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | // Copyright 2024 Google LLC
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stddef.h>
#include <random>
#include <string>
#include <vector>
#include "third_party/gemma_cpp/gemma.h"
#include "util/app.h" // LoaderArgs
#include "hwy/base.h"
#include "hwy/contrib/thread_pool/thread_pool.h"
std::vector<int> tokenize(const std::string& prompt_string,
const gcpp::GemmaTokenizer* tokenizer) {
std::string formatted = "<start_of_turn>user\n" + prompt_string +
"<end_of_turn>\n<start_of_turn>model\n";
std::vector<int> tokens;
HWY_ASSERT(tokenizer->Encode(formatted, &tokens));
tokens.insert(tokens.begin(), BOS_ID);
return tokens;
}
int main(int argc, char** argv) {
gcpp::LoaderArgs loader(argc, argv);
gcpp::AppArgs app(argc, argv);
// Instantiate model and KV Cache
hwy::ThreadPool pool(app.num_threads);
gcpp::Gemma model = gcpp::CreateGemma(loader, pool);
gcpp::KVCache kv_cache = gcpp::KVCache::Create(loader.ModelType());
size_t pos = 0; // KV Cache position
// Initialize random number generator
std::mt19937 gen;
std::random_device rd;
gen.seed(rd());
// Tokenize instruction
std::vector<int> tokens =
tokenize("Write a greeting to the world.", model.Tokenizer());
size_t ntokens = tokens.size();
// This callback function gets invoked every time a token is generated
auto stream_token = [&pos, &ntokens, tokenizer = model.Tokenizer()](int token,
float) {
++pos;
if (pos < ntokens) {
// print feedback
} else if (token != gcpp::EOS_ID) {
std::string token_text;
HWY_ASSERT(tokenizer->Decode(std::vector<int>{token}, &token_text));
std::cout << token_text << std::flush;
}
return true;
};
GenerateGemma(model,
{.max_tokens = 2048,
.max_generated_tokens = 1024,
.temperature = 1.0,
.verbosity = 0},
tokens, /*KV cache position = */ 0, kv_cache, pool,
stream_token, gen);
}
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