mirror of
https://github.com/ggml-org/llama.cpp.git
synced 2025-10-31 08:51:55 +00:00
898acba681
* rpc : add support for multiple devices Allow rpc-server to expose multiple devices from a single endpoint. Change RPC protocol to include device identifier where needed. closes: #15210 * fixes * use ggml_backend_reg_t * address review comments * fix llama-bench backend report * address review comments, change device naming * fix cmd order
335 lines
12 KiB
C++
335 lines
12 KiB
C++
#if defined(_MSC_VER)
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#define _SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING
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#endif
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#include "ggml-rpc.h"
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#ifdef _WIN32
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# define NOMINMAX
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# define DIRECTORY_SEPARATOR '\\'
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# include <locale>
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# include <windows.h>
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# include <fcntl.h>
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# include <io.h>
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#else
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# define DIRECTORY_SEPARATOR '/'
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# include <unistd.h>
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# include <sys/stat.h>
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#endif
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#include <codecvt>
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#include <string>
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#include <stdio.h>
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#include <vector>
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#include <filesystem>
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#include <algorithm>
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#include <thread>
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#include <regex>
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namespace fs = std::filesystem;
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// NOTE: this is copied from common.cpp to avoid linking with libcommon
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// returns true if successful, false otherwise
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static bool fs_create_directory_with_parents(const std::string & path) {
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#ifdef _WIN32
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std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
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std::wstring wpath = converter.from_bytes(path);
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// if the path already exists, check whether it's a directory
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const DWORD attributes = GetFileAttributesW(wpath.c_str());
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if ((attributes != INVALID_FILE_ATTRIBUTES) && (attributes & FILE_ATTRIBUTE_DIRECTORY)) {
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return true;
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}
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size_t pos_slash = 0;
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// process path from front to back, procedurally creating directories
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while ((pos_slash = path.find('\\', pos_slash)) != std::string::npos) {
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const std::wstring subpath = wpath.substr(0, pos_slash);
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const wchar_t * test = subpath.c_str();
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const bool success = CreateDirectoryW(test, NULL);
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if (!success) {
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const DWORD error = GetLastError();
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// if the path already exists, ensure that it's a directory
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if (error == ERROR_ALREADY_EXISTS) {
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const DWORD attributes = GetFileAttributesW(subpath.c_str());
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if (attributes == INVALID_FILE_ATTRIBUTES || !(attributes & FILE_ATTRIBUTE_DIRECTORY)) {
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return false;
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}
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} else {
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return false;
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}
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}
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pos_slash += 1;
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}
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return true;
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#else
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// if the path already exists, check whether it's a directory
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struct stat info;
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if (stat(path.c_str(), &info) == 0) {
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return S_ISDIR(info.st_mode);
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}
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size_t pos_slash = 1; // skip leading slashes for directory creation
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// process path from front to back, procedurally creating directories
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while ((pos_slash = path.find('/', pos_slash)) != std::string::npos) {
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const std::string subpath = path.substr(0, pos_slash);
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struct stat info;
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// if the path already exists, ensure that it's a directory
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if (stat(subpath.c_str(), &info) == 0) {
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if (!S_ISDIR(info.st_mode)) {
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return false;
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}
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} else {
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// create parent directories
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const int ret = mkdir(subpath.c_str(), 0755);
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if (ret != 0) {
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return false;
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}
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}
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pos_slash += 1;
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}
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return true;
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#endif // _WIN32
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}
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// NOTE: this is copied from common.cpp to avoid linking with libcommon
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static std::string fs_get_cache_directory() {
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std::string cache_directory = "";
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auto ensure_trailing_slash = [](std::string p) {
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// Make sure to add trailing slash
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if (p.back() != DIRECTORY_SEPARATOR) {
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p += DIRECTORY_SEPARATOR;
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}
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return p;
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};
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if (getenv("LLAMA_CACHE")) {
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cache_directory = std::getenv("LLAMA_CACHE");
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} else {
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#if defined(__linux__) || defined(__FreeBSD__) || defined(_AIX) || defined(__OpenBSD__)
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if (std::getenv("XDG_CACHE_HOME")) {
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cache_directory = std::getenv("XDG_CACHE_HOME");
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} else {
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cache_directory = std::getenv("HOME") + std::string("/.cache/");
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}
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#elif defined(__APPLE__)
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cache_directory = std::getenv("HOME") + std::string("/Library/Caches/");
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#elif defined(_WIN32)
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cache_directory = std::getenv("LOCALAPPDATA");
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#else
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# error Unknown architecture
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#endif
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cache_directory = ensure_trailing_slash(cache_directory);
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cache_directory += "llama.cpp";
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}
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return ensure_trailing_slash(cache_directory);
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}
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struct rpc_server_params {
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std::string host = "127.0.0.1";
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int port = 50052;
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bool use_cache = false;
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int n_threads = std::max(1U, std::thread::hardware_concurrency()/2);
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std::vector<std::string> devices;
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std::vector<size_t> dev_mem;
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};
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static void print_usage(int /*argc*/, char ** argv, rpc_server_params params) {
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fprintf(stderr, "Usage: %s [options]\n\n", argv[0]);
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fprintf(stderr, "options:\n");
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fprintf(stderr, " -h, --help show this help message and exit\n");
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fprintf(stderr, " -t, --threads N number of threads for the CPU device (default: %d)\n", params.n_threads);
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fprintf(stderr, " -d, --device <dev1,dev2,...> comma-separated list of devices\n");
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fprintf(stderr, " -H, --host HOST host to bind to (default: %s)\n", params.host.c_str());
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fprintf(stderr, " -p, --port PORT port to bind to (default: %d)\n", params.port);
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fprintf(stderr, " -m, --mem <M1,M2,...> memory size for each device (in MB)\n");
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fprintf(stderr, " -c, --cache enable local file cache\n");
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fprintf(stderr, "\n");
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}
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static bool rpc_server_params_parse(int argc, char ** argv, rpc_server_params & params) {
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std::string arg;
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for (int i = 1; i < argc; i++) {
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arg = argv[i];
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if (arg == "-H" || arg == "--host") {
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if (++i >= argc) {
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return false;
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}
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params.host = argv[i];
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} else if (arg == "-t" || arg == "--threads") {
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if (++i >= argc) {
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return false;
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}
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params.n_threads = std::stoi(argv[i]);
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if (params.n_threads <= 0) {
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fprintf(stderr, "error: invalid number of threads: %d\n", params.n_threads);
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return false;
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}
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} else if (arg == "-d" || arg == "--device") {
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if (++i >= argc) {
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return false;
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}
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const std::regex regex{ R"([,/]+)" };
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std::string dev_str = argv[i];
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std::sregex_token_iterator iter(dev_str.begin(), dev_str.end(), regex, -1);
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std::sregex_token_iterator end;
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for ( ; iter != end; ++iter) {
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try {
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params.devices.push_back(*iter);
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} catch (const std::exception & ) {
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fprintf(stderr, "error: invalid device: %s\n", iter->str().c_str());
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return false;
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}
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}
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} else if (arg == "-p" || arg == "--port") {
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if (++i >= argc) {
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return false;
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}
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params.port = std::stoi(argv[i]);
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if (params.port <= 0 || params.port > 65535) {
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return false;
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}
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} else if (arg == "-c" || arg == "--cache") {
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params.use_cache = true;
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} else if (arg == "-m" || arg == "--mem") {
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if (++i >= argc) {
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return false;
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}
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const std::regex regex{ R"([,/]+)" };
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std::string mem_str = argv[i];
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std::sregex_token_iterator iter(mem_str.begin(), mem_str.end(), regex, -1);
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std::sregex_token_iterator end;
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for ( ; iter != end; ++iter) {
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try {
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size_t mem = std::stoul(*iter) * 1024 * 1024;
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params.dev_mem.push_back(mem);
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} catch (const std::exception & ) {
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fprintf(stderr, "error: invalid memory size: %s\n", iter->str().c_str());
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return false;
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}
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}
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} else if (arg == "-h" || arg == "--help") {
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print_usage(argc, argv, params);
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exit(0);
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} else {
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fprintf(stderr, "error: unknown argument: %s\n", arg.c_str());
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print_usage(argc, argv, params);
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exit(0);
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}
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}
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return true;
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}
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static std::vector<ggml_backend_dev_t> get_devices(const rpc_server_params & params) {
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std::vector<ggml_backend_dev_t> devices;
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if (!params.devices.empty()) {
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for (auto device : params.devices) {
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ggml_backend_dev_t dev = ggml_backend_dev_by_name(device.c_str());
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if (dev) {
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devices.push_back(dev);
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} else {
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fprintf(stderr, "error: unknown device: %s\n", device.c_str());
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fprintf(stderr, "available devices:\n");
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for (size_t i = 0; i < ggml_backend_dev_count(); i++) {
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auto * dev = ggml_backend_dev_get(i);
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size_t free, total;
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ggml_backend_dev_memory(dev, &free, &total);
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printf(" %s: %s (%zu MiB, %zu MiB free)\n", ggml_backend_dev_name(dev), ggml_backend_dev_description(dev), total / 1024 / 1024, free / 1024 / 1024);
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}
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return {};
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}
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}
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}
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// Try non-CPU devices first
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if (devices.empty()) {
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for (size_t i = 0; i < ggml_backend_dev_count(); i++) {
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ggml_backend_dev_t dev = ggml_backend_dev_get(i);
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if (ggml_backend_dev_type(dev) != GGML_BACKEND_DEVICE_TYPE_CPU) {
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devices.push_back(dev);
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}
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}
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}
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// If there are no accelerators, fallback to CPU device
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if (devices.empty()) {
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ggml_backend_dev_t dev = ggml_backend_dev_by_type(GGML_BACKEND_DEVICE_TYPE_CPU);
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if (dev) {
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devices.push_back(dev);
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}
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}
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return devices;
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}
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int main(int argc, char * argv[]) {
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ggml_backend_load_all();
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rpc_server_params params;
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if (!rpc_server_params_parse(argc, argv, params)) {
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fprintf(stderr, "Invalid parameters\n");
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return 1;
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}
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if (params.host != "127.0.0.1") {
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fprintf(stderr, "\n");
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fprintf(stderr, "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n");
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fprintf(stderr, "WARNING: Host ('%s') is != '127.0.0.1'\n", params.host.c_str());
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fprintf(stderr, " Never expose the RPC server to an open network!\n");
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fprintf(stderr, " This is an experimental feature and is not secure!\n");
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fprintf(stderr, "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n");
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fprintf(stderr, "\n");
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}
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auto devices = get_devices(params);
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if (devices.empty()) {
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fprintf(stderr, "No devices found\n");
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return 1;
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}
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std::string endpoint = params.host + ":" + std::to_string(params.port);
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std::vector<size_t> free_mem, total_mem;
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for (size_t i = 0; i < devices.size(); i++) {
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if (i < params.dev_mem.size()) {
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free_mem.push_back(params.dev_mem[i]);
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total_mem.push_back(params.dev_mem[i]);
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} else {
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size_t free, total;
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ggml_backend_dev_memory(devices[i], &free, &total);
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free_mem.push_back(free);
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total_mem.push_back(total);
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}
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}
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const char * cache_dir = nullptr;
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std::string cache_dir_str;
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if (params.use_cache) {
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cache_dir_str = fs_get_cache_directory() + "rpc/";
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if (!fs_create_directory_with_parents(cache_dir_str)) {
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fprintf(stderr, "Failed to create cache directory: %s\n", cache_dir_str.c_str());
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return 1;
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}
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cache_dir = cache_dir_str.c_str();
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}
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ggml_backend_reg_t reg = ggml_backend_reg_by_name("RPC");
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if (!reg) {
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fprintf(stderr, "Failed to find RPC backend\n");
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return 1;
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}
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auto start_server_fn = (decltype(ggml_backend_rpc_start_server)*) ggml_backend_reg_get_proc_address(reg, "ggml_backend_rpc_start_server");
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if (!start_server_fn) {
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fprintf(stderr, "Failed to obtain RPC backend start server function\n");
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return 1;
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}
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start_server_fn(endpoint.c_str(), cache_dir, params.n_threads, devices.size(),
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devices.data(), free_mem.data(), total_mem.data());
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return 0;
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}
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