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set(TARGET save-load-state) | ||
add_executable(${TARGET} save-load-state.cpp) | ||
target_link_libraries(${TARGET} PRIVATE common llama ${CMAKE_THREAD_LIBS_INIT}) | ||
target_compile_features(${TARGET} PRIVATE cxx_std_11) |
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#include <vector> | ||
#include <cstdio> | ||
#include <chrono> | ||
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#include "common.h" | ||
#include "llama.h" | ||
#include "llama.cpp" | ||
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using namespace std; | ||
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int main(int argc, char ** argv) { | ||
gpt_params params; | ||
params.model = "models/llama-7B/ggml-model.bin"; | ||
params.seed = 42; | ||
params.n_threads = 4; | ||
params.repeat_last_n = 64; | ||
params.prompt = "The quick brown fox"; | ||
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if (gpt_params_parse(argc, argv, params) == false) { | ||
return 1; | ||
} | ||
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auto lparams = llama_context_default_params(); | ||
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lparams.n_ctx = params.n_ctx; | ||
lparams.n_parts = params.n_parts; | ||
lparams.seed = params.seed; | ||
lparams.f16_kv = params.memory_f16; | ||
lparams.use_mmap = params.use_mmap; | ||
lparams.use_mlock = params.use_mlock; | ||
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auto n_past = 0; | ||
auto last_n_tokens_data = vector<llama_token>(params.repeat_last_n, 0); | ||
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// init | ||
auto ctx = llama_init_from_file(params.model.c_str(), lparams); | ||
auto tokens = vector<llama_token>(params.n_ctx); | ||
auto n_prompt_tokens = llama_tokenize(ctx, params.prompt.c_str(), tokens.data(), tokens.size(), true); | ||
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if (n_prompt_tokens < 1) { | ||
fprintf(stderr, "%s : failed to tokenize prompt\n", __func__); | ||
return 1; | ||
} | ||
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// evaluate prompt | ||
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llama_eval(ctx, tokens.data(), n_prompt_tokens, n_past, params.n_threads); | ||
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last_n_tokens_data.insert(last_n_tokens_data.end(), tokens.data(), tokens.data() + n_prompt_tokens); | ||
n_past += n_prompt_tokens; | ||
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// Save state (rng, logits, embedding and kv_cache) to file | ||
FILE *fp_write = fopen("dump_state.bin", "wb"); | ||
auto state_size = llama_get_state_size(ctx); | ||
auto state_mem = new uint8_t[state_size]; | ||
llama_copy_state_data(ctx, state_mem); // could also copy directly to memory mapped file | ||
fwrite(state_mem, 1, state_size, fp_write); | ||
fclose(fp_write); | ||
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// save state (last tokens) | ||
auto last_n_tokens_data_saved = vector<llama_token>(last_n_tokens_data); | ||
auto n_past_saved = n_past; | ||
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// first run | ||
printf("\n%s", params.prompt.c_str()); | ||
for (auto i = 0; i < params.n_predict; i++) { | ||
auto next_token = llama_sample_top_p_top_k( | ||
ctx, | ||
&last_n_tokens_data.back() - params.repeat_last_n, | ||
params.repeat_last_n, | ||
40, | ||
1.0, | ||
1.0, | ||
1.1); | ||
auto next_token_str = llama_token_to_str(ctx, next_token); | ||
last_n_tokens_data.push_back(next_token); | ||
printf("%s", next_token_str); | ||
if (llama_eval(ctx, &next_token, 1, n_past, params.n_threads)) { | ||
fprintf(stderr, "\n%s : failed to evaluate\n", __func__); | ||
return 1; | ||
} | ||
n_past += 1; | ||
} | ||
printf("\n\n"); | ||
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// free old model | ||
llama_free(ctx); | ||
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// load new model | ||
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auto ctx2 = llama_init_from_file(params.model.c_str(), lparams); | ||
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// Load state (rng, logits, embedding and kv_cache) from file | ||
FILE *fp_read = fopen("dump_state.bin", "rb"); | ||
auto state_size2 = llama_get_state_size(ctx2); | ||
if (state_size != state_size2) { | ||
fprintf(stderr, "\n%s : failed to validate state size\n", __func__); | ||
} | ||
fread(state_mem, 1, state_size, fp_read); | ||
llama_set_state_data(ctx2, state_mem); // could also read directly from memory mapped file | ||
fclose(fp_read); | ||
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// restore state (last tokens) | ||
last_n_tokens_data = last_n_tokens_data_saved; | ||
n_past = n_past_saved; | ||
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// second run | ||
for (auto i = 0; i < params.n_predict; i++) { | ||
auto next_token = llama_sample_top_p_top_k( | ||
ctx2, | ||
&last_n_tokens_data.back() - params.repeat_last_n, | ||
params.repeat_last_n, | ||
40, | ||
1.0, | ||
1.0, | ||
1.1); | ||
auto next_token_str = llama_token_to_str(ctx2, next_token); | ||
last_n_tokens_data.push_back(next_token); | ||
printf("%s", next_token_str); | ||
if (llama_eval(ctx2, &next_token, 1, n_past, params.n_threads)) { | ||
fprintf(stderr, "\n%s : failed to evaluate\n", __func__); | ||
return 1; | ||
} | ||
n_past += 1; | ||
} | ||
printf("\n\n"); | ||
return 0; | ||
} |
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