llama.cpp/examples/rpc/rpc-server.cpp

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#ifdef GGML_USE_CUDA
#include "ggml-cuda.h"
#endif
#ifdef GGML_USE_METAL
#include "ggml-metal.h"
#endif
#include "ggml-rpc.h"
#ifdef _WIN32
# include <windows.h>
#else
# include <unistd.h>
#endif
#include <string>
#include <stdio.h>
struct rpc_server_params {
std::string host = "0.0.0.0";
int port = 50052;
size_t backend_mem = 0;
};
static void print_usage(int /*argc*/, char ** argv, rpc_server_params params) {
fprintf(stderr, "Usage: %s [options]\n\n", argv[0]);
fprintf(stderr, "options:\n");
fprintf(stderr, " -h, --help show this help message and exit\n");
fprintf(stderr, " -H HOST, --host HOST host to bind to (default: %s)\n", params.host.c_str());
fprintf(stderr, " -p PORT, --port PORT port to bind to (default: %d)\n", params.port);
fprintf(stderr, " -m MEM, --mem MEM backend memory size (in MB)\n");
fprintf(stderr, "\n");
}
static bool rpc_server_params_parse(int argc, char ** argv, rpc_server_params & params) {
std::string arg;
for (int i = 1; i < argc; i++) {
arg = argv[i];
if (arg == "-H" || arg == "--host") {
if (++i >= argc) {
return false;
}
params.host = argv[i];
} else if (arg == "-p" || arg == "--port") {
if (++i >= argc) {
return false;
}
params.port = std::stoi(argv[i]);
if (params.port <= 0 || params.port > 65535) {
return false;
}
} else if (arg == "-m" || arg == "--mem") {
if (++i >= argc) {
return false;
}
params.backend_mem = std::stoul(argv[i]) * 1024 * 1024;
} else if (arg == "-h" || arg == "--help") {
print_usage(argc, argv, params);
exit(0);
} else {
fprintf(stderr, "error: unknown argument: %s\n", arg.c_str());
print_usage(argc, argv, params);
exit(0);
}
}
return true;
}
static ggml_backend_t create_backend() {
ggml_backend_t backend = NULL;
#ifdef GGML_USE_CUDA
fprintf(stderr, "%s: using CUDA backend\n", __func__);
backend = ggml_backend_cuda_init(0); // init device 0
if (!backend) {
fprintf(stderr, "%s: ggml_backend_cuda_init() failed\n", __func__);
}
#elif GGML_USE_METAL
fprintf(stderr, "%s: using Metal backend\n", __func__);
backend = ggml_backend_metal_init();
if (!backend) {
fprintf(stderr, "%s: ggml_backend_metal_init() failed\n", __func__);
}
#endif
// if there aren't GPU Backends fallback to CPU backend
if (!backend) {
fprintf(stderr, "%s: using CPU backend\n", __func__);
backend = ggml_backend_cpu_init();
}
return backend;
}
static void get_backend_memory(size_t * free_mem, size_t * total_mem) {
#ifdef GGML_USE_CUDA
ggml_backend_cuda_get_device_memory(0, free_mem, total_mem);
#else
#ifdef _WIN32
MEMORYSTATUSEX status;
status.dwLength = sizeof(status);
GlobalMemoryStatusEx(&status);
*total_mem = status.ullTotalPhys;
*free_mem = status.ullAvailPhys;
#else
long pages = sysconf(_SC_PHYS_PAGES);
long page_size = sysconf(_SC_PAGE_SIZE);
*total_mem = pages * page_size;
*free_mem = *total_mem;
#endif
#endif
}
int main(int argc, char * argv[]) {
rpc_server_params params;
if (!rpc_server_params_parse(argc, argv, params)) {
fprintf(stderr, "Invalid parameters\n");
return 1;
}
ggml_backend_t backend = create_backend();
if (!backend) {
fprintf(stderr, "Failed to create backend\n");
return 1;
}
std::string endpoint = params.host + ":" + std::to_string(params.port);
size_t free_mem, total_mem;
if (params.backend_mem > 0) {
free_mem = params.backend_mem;
total_mem = params.backend_mem;
} else {
get_backend_memory(&free_mem, &total_mem);
}
printf("Starting RPC server on %s, backend memory: %zu MB\n", endpoint.c_str(), free_mem / (1024 * 1024));
start_rpc_server(backend, endpoint.c_str(), free_mem, total_mem);
ggml_backend_free(backend);
return 0;
}