From 64b3fbb150d12b3ca63ac2fb4e57bc46f41d2ccd Mon Sep 17 00:00:00 2001 From: Daniel Hiltgen Date: Mon, 13 Nov 2023 12:25:58 -0800 Subject: [PATCH] Expose callable API for server This adds an extern "C" interface within the example server --- examples/server/CMakeLists.txt | 24 ++++ examples/server/server.cpp | 247 +++++++++++++++++++++++++++++++++ examples/server/server.h | 83 +++++++++++ ggml-cuda.cu | 1 + 4 files changed, 355 insertions(+) create mode 100644 examples/server/server.h diff --git a/examples/server/CMakeLists.txt b/examples/server/CMakeLists.txt index 859cd12..4ea47a7 100644 --- a/examples/server/CMakeLists.txt +++ b/examples/server/CMakeLists.txt @@ -11,3 +11,27 @@ if (WIN32) TARGET_LINK_LIBRARIES(${TARGET} PRIVATE ws2_32) endif() target_compile_features(${TARGET} PRIVATE cxx_std_11) + +set(TARGET ext_server) +option(LLAMA_SERVER_VERBOSE "Build verbose logging option for Server" ON) +add_library(${TARGET} STATIC server.cpp) +target_include_directories(${TARGET} PRIVATE ../../common) +target_include_directories(${TARGET} PRIVATE ../..) +target_compile_features(${TARGET} PRIVATE cxx_std_11) +target_compile_definitions(${TARGET} PUBLIC LLAMA_SERVER_LIBRARY=1) +target_link_libraries(${TARGET} PRIVATE common llama llava ${CMAKE_THREAD_LIBS_INIT}) + +if (BUILD_SHARED_LIBS) + set_target_properties(ext_server PROPERTIES POSITION_INDEPENDENT_CODE ON) + target_compile_definitions(ext_server PRIVATE LLAMA_SHARED LLAMA_BUILD) + add_library(ext_server_shared SHARED $) + target_link_libraries(ext_server_shared PRIVATE ggml llama llava common ${CMAKE_THREAD_LIBS_INIT}) + install(TARGETS ext_server_shared LIBRARY) +endif() + +if (CUDAToolkit_FOUND) + target_include_directories(${TARGET} PRIVATE ${CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES}) + if (WIN32) + target_link_libraries(ext_server_shared PRIVATE nvml) + endif() +endif() \ No newline at end of file diff --git a/examples/server/server.cpp b/examples/server/server.cpp index 895f751..f939590 100644 --- a/examples/server/server.cpp +++ b/examples/server/server.cpp @@ -5,6 +5,9 @@ #include "../llava/clip.h" #include "stb_image.h" +#if defined(LLAMA_SERVER_LIBRARY) +#include "server.h" +#endif #ifndef NDEBUG // crash the server in debug mode, otherwise send an http 500 error @@ -2631,6 +2634,7 @@ static void append_to_generated_text_from_generated_token_probs(llama_server_con } } +#ifndef LLAMA_SERVER_LIBRARY int main(int argc, char **argv) { // own arguments required by this example @@ -3065,3 +3069,246 @@ int main(int argc, char **argv) llama_backend_free(); return 0; } + +#else // LLAMA_SERVER_LIBRARY +// Expose the llama server as a callable extern "C" API +llama_server_context llama; +std::atomic ext_server_running(false); +std::thread ext_server_thread; +inline ext_server_err makeErr(uint32_t code, std::string msg) { + if (code == 0) { + return ext_server_err{0, NULL}; + } + const std::string::size_type size = msg.size(); + ext_server_err ret = { + code, + new char[size + 1], + }; + memcpy(ret.err, msg.c_str(), size + 1); + return ret; +} + +ext_server_err llama_server_init(ext_server_params *sparams) +{ + log_set_target(stdout); + gpt_params params; + params.n_ctx = sparams->n_ctx; + params.n_batch = sparams->n_batch; + params.n_threads = sparams->n_threads; + params.n_parallel = sparams->n_parallel; + params.rope_freq_base = sparams->rope_freq_base; + params.rope_freq_scale = sparams->rope_freq_scale; + + if (sparams->memory_f16) { + params.cache_type_k = "f16"; + params.cache_type_v = "f16"; + } else { + params.cache_type_k = "f32"; + params.cache_type_v = "f32"; + } + + params.n_gpu_layers = sparams->n_gpu_layers; + params.main_gpu = sparams->main_gpu; + params.use_mlock = sparams->use_mlock; + params.use_mmap = sparams->use_mmap; + params.numa = sparams->numa; + params.embedding = sparams->embedding; + if (sparams->model != NULL) { + params.model = sparams->model; + } + + for (ext_server_lora_adapter *la = sparams->lora_adapters; la != NULL; la = la->next) { + params.lora_adapter.push_back(std::make_tuple(la->adapter, la->scale)); + } + + try { + llama_backend_init(params.numa); + + // load the model + if (!llama.load_model(params)) + { + // TODO - consider modifying the logging logic or patching load_model so we can capture more detailed error messages + // and pass them back to the caller for better UX + return makeErr(1, "error loading model " + params.model); + } + + llama.initialize(); + } catch (std::exception &e) { + return makeErr(1, e.what()); + } catch (...) { + return makeErr(1, "Unknown Exception initializing llama server"); + } + return makeErr(0, ""); +} + +void llama_server_start() +{ + // TODO mutex to protect thread creation + ext_server_thread = std::thread([&]() + { + ext_server_running = true; + try { + LOG_TEE("llama server main loop starting\n"); + ggml_time_init(); + while (ext_server_running.load()) + { + if (!llama.update_slots()) { + LOG_TEE("unexpected error in llama server update_slots - exiting main loop\n"); + break; + } + } + } catch (std::exception &e) { + LOG_TEE("caught exception in llama server main loop: %s\n", e.what()); + } catch (...) { + LOG_TEE("caught unknown exception in llama server main loop\n"); + } + LOG_TEE("\nllama server shutting down\n"); + llama_backend_free(); + }); +} + +void llama_server_stop() { + // TODO - too verbose, remove once things are solid + LOG_TEE("requesting llama server shutdown\n"); + ext_server_running = false; + ext_server_thread.join(); + LOG_TEE("llama server shutdown complete\n"); +} + +ext_server_completion_resp llama_server_completion(const char *json_req) { + std::string msg; + ext_server_completion_resp resp = { + 0, + NULL, + }; + try { + json data = json::parse(json_req); + resp.task_id = llama.request_completion(data, false, false, -1); + return resp; + } catch (std::exception &e) { + msg = e.what(); + } catch (...) { + msg = "Unknown Exception during completion"; + } + const std::string::size_type size = msg.size(); + resp.task_id = 0; + resp.err = new char[size + 1]; + memcpy(resp.err, msg.c_str(), size + 1); + return resp; +} + +ext_task_result llama_server_completion_next_result(const int task_id) { + std::string msg; + ext_task_result resp = {-1,false,false,NULL}; + try { + task_result result = llama.next_result(task_id); + std::string result_json = result.result_json.dump(-1, ' ', false, json::error_handler_t::replace); + const std::string::size_type size = result_json.size(); + resp.id = result.id; + resp.stop = result.stop; + resp.error = result.error; + resp.result_json = new char[size + 1]; + memcpy(resp.result_json, result_json.c_str(), size + 1); + if (result.error) { + llama.request_cancel(task_id); + } else if (result.stop) { + llama.request_cancel(task_id); + } + return resp; + } catch (std::exception &e) { + msg = e.what(); // TODO - json? + } catch (...) { + msg = "Unknown Exception during completion"; + } + resp.error = true; + const std::string::size_type size = msg.size(); + resp.result_json = new char[size + 1]; + memcpy(resp.result_json, msg.c_str(), size + 1); + return resp; +} + +ext_server_err llama_server_completion_cancel(const int task_id) { + try { + llama.request_cancel(task_id); + } catch (std::exception &e) { + return makeErr(1, e.what()); + } catch (...) { + return makeErr(1, "Unknown Exception running llama server"); + } + return makeErr(0, ""); +} + + +ext_server_err llama_server_tokenize(const char *json_req, ext_server_resp *resp) { + resp->json_resp = NULL; + try { + const json body = json::parse(json_req); + std::vector tokens; + if (body.count("content") != 0) + { + tokens = llama.tokenize(body["content"], false); + } + const json data = format_tokenizer_response(tokens); + std::string result_json = data.dump(); + const std::string::size_type size = result_json.size(); + resp->json_resp = new char[size + 1]; + memcpy(resp->json_resp, result_json.c_str(), size + 1); + } catch (std::exception &e) { + return makeErr(1, e.what()); + } catch (...) { + return makeErr(1, "Unknown Exception during tokenize"); + } + return makeErr(0, ""); +} + +ext_server_err llama_server_detokenize(const char *json_req, ext_server_resp *resp) { + resp->json_resp = NULL; + try { + const json body = json::parse(json_req); + std::string content; + if (body.count("tokens") != 0) + { + const std::vector tokens = body["tokens"]; + content = tokens_to_str(llama.ctx, tokens.cbegin(), tokens.cend()); + } + const json data = format_detokenized_response(content); + std::string result_json = data.dump(); + const std::string::size_type size = result_json.size(); + resp->json_resp = new char[size + 1]; + memcpy(resp->json_resp, result_json.c_str(), size + 1); + } catch (std::exception &e) { + return makeErr(1, e.what()); + } catch (...) { + return makeErr(1, "Unknown Exception during detokenize"); + } + return makeErr(0, ""); +} + +ext_server_err llama_server_embedding(const char *json_req, ext_server_resp *resp) { + resp->json_resp = NULL; + try { + const json body = json::parse(json_req); + json prompt; + if (body.count("content") != 0) + { + prompt = body["content"]; + } + else + { + prompt = ""; + } + const int task_id = llama.request_completion({ {"prompt", prompt}, { "n_predict", 0} }, false, true, -1); + task_result result = llama.next_result(task_id); + std::string result_json = result.result_json.dump(); + const std::string::size_type size = result_json.size(); + resp->json_resp = new char[size + 1]; + memcpy(resp->json_resp, result_json.c_str(), size + 1); + } catch (std::exception &e) { + return makeErr(1, e.what()); + } catch (...) { + return makeErr(1, "Unknown Exception during detokenize"); + } + return makeErr(0, ""); +} + +#endif // LLAMA_SERVER_LIBRARY \ No newline at end of file diff --git a/examples/server/server.h b/examples/server/server.h new file mode 100644 index 0000000..4d03b1e --- /dev/null +++ b/examples/server/server.h @@ -0,0 +1,83 @@ +#if defined(LLAMA_SERVER_LIBRARY) +#ifndef LLAMA_SERVER_H +#define LLAMA_SERVER_H +#include +#include +#include +#include + +// This exposes extern C entrypoints into the llama_server +// To enable the server compile with LLAMA_SERVER_LIBRARY + +#ifdef __cplusplus +extern "C" +{ +#endif + // TODO - clean the type def's up a bit for better consistency + typedef struct ext_server_err { + uint32_t code; // 0 on success, > 0 on error + char *err; // null if code == 0; else contains error message. Caller responsible for freeing memory + } ext_server_err; + + typedef struct ext_server_lora_adapter { + char *adapter; + float scale; + struct ext_server_lora_adapter *next; + } ext_server_lora_adapter; + typedef struct ext_server_params + { + char *model; + uint32_t n_ctx; // text context, 0 = from model + uint32_t n_batch; // prompt processing maximum batch size + uint32_t n_threads; // number of threads to use for generation + int32_t n_parallel; // number of parallel sequences to decodewra + float rope_freq_base; // RoPE base frequency, 0 = from model + float rope_freq_scale; // RoPE frequency scaling factor, 0 = from model + bool memory_f16; // use f16 instead of f32 for memory kv + int32_t n_gpu_layers; // number of layers to store in VRAM (-1 - use default) + int32_t main_gpu; // the GPU that is used for scratch and small tensors + bool use_mlock; // force system to keep model in RAM + bool use_mmap; // use mmap if possible + bool numa; // attempt optimizations that help on some NUMA systems + bool embedding; // get only sentence embedding + ext_server_lora_adapter* lora_adapters; + } ext_server_params; + + // Initialize the server once per process + ext_server_err llama_server_init(ext_server_params *sparams); + + // Run the main loop + void llama_server_start(); + // Stop the main loop + void llama_server_stop(); + + typedef struct ext_task_result + { + int id; + bool stop; + bool error; + char* result_json; // caller responsible to free this memory + } ext_task_result; + + typedef struct ext_server_completion_resp { + int task_id; // < 0 on error, >= 0 on success + char *err; // null if task_id >= 0; else contains error message. Caller responsible for freeing memory + } ext_server_completion_resp; + ext_server_completion_resp llama_server_completion(const char *json_req); + ext_task_result llama_server_completion_next_result(const int task_id); + ext_server_err llama_server_completion_cancel(const int task_id); + + // Caller responsible for freeing json_resp + typedef struct ext_server_resp { + char *json_resp; // Caller responsible for freeing string + } ext_server_resp; + ext_server_err llama_server_tokenize(const char *json_req, ext_server_resp *resp); + ext_server_err llama_server_detokenize(const char *json_req, ext_server_resp *resp); + ext_server_err llama_server_embedding(const char *json_req, ext_server_resp *resp); + +#ifdef __cplusplus +} +#endif + +#endif +#endif // LLAMA_SERVER_LIBRARY \ No newline at end of file diff --git a/ggml-cuda.cu b/ggml-cuda.cu index 85f7a29..ce51364 100644 --- a/ggml-cuda.cu +++ b/ggml-cuda.cu @@ -6410,6 +6410,7 @@ static cudaError_t ggml_cuda_cpy_tensor_2d( CUDA_CHECK(cudaGetDevice(&id)); src_ptr = (char *) extra->data_device[id]; } else { + fprintf(stderr, "ggml_cuda_cpy_tensor_2d assert: backend: %d\n", src->backend); GGML_ASSERT(false); } char * dst_ptr = (char *) dst; -- 2.39.3 (Apple Git-145)