rpc : use backend registry, support dl backends (llama/13304)

ggml/src/ggml-cpu/ggml-cpu.cpp

@@ -11,24 +11,26 @@
 #include <vector>
 
 #ifdef GGML_USE_CPU_HBM
-#include "ggml-cpu-hbm.h"
+#    include "ggml-cpu-hbm.h"
 #endif
 
 #ifdef GGML_USE_CPU_KLEIDIAI
-#include "kleidiai/kleidiai.h"
-#endif
-
-#if defined(__APPLE__)
-#include <sys/types.h>
-#include <sys/sysctl.h>
+#    include "kleidiai/kleidiai.h"
 #endif
 
 #if defined(_WIN32)
-#define WIN32_LEAN_AND_MEAN
-#ifndef NOMINMAX
-    #define NOMINMAX
+#    define WIN32_LEAN_AND_MEAN
+#    ifndef NOMINMAX
+#        define NOMINMAX
+#    endif
+#    include <windows.h>
+#else
+#    include <unistd.h>
 #endif
-#include <windows.h>
+
+#if defined(__APPLE__)
+#    include <sys/sysctl.h>
+#    include <sys/types.h>
 #endif
 
 // ggml-backend interface
@@ -70,8 +72,10 @@ static ggml_backend_buffer_type_t * ggml_backend_cpu_device_get_extra_buffers_ty
 }
 
 static bool ggml_backend_cpu_is_extra_buffer_type(ggml_backend_buffer_type_t buft) {
-    for (auto extra : ggml_backend_cpu_get_extra_buffers_type()) {
-        if (extra && extra == buft) return true;
+    for (auto * extra : ggml_backend_cpu_get_extra_buffers_type()) {
+        if (extra && extra == buft) {
+            return true;
+        }
     }
     return false;
 }
@@ -330,9 +334,18 @@ static const char * ggml_backend_cpu_device_get_description(ggml_backend_dev_t d
 }
 
 static void ggml_backend_cpu_device_get_memory(ggml_backend_dev_t dev, size_t * free, size_t * total) {
-    // TODO
-    *free = 0;
-    *total = 0;
+#ifdef _WIN32
+    MEMORYSTATUSEX status;
+    status.dwLength = sizeof(status);
+    GlobalMemoryStatusEx(&status);
+    *total = status.ullTotalPhys;
+    *free = status.ullAvailPhys;
+#else
+    long pages = sysconf(_SC_PHYS_PAGES);
+    long page_size = sysconf(_SC_PAGE_SIZE);
+    *total = pages * page_size;
+    *free = *total;
+#endif
 
     GGML_UNUSED(dev);
 }

ggml/src/ggml-rpc/ggml-rpc.cpp

@@ -1594,6 +1594,14 @@ static void rpc_serve_client(ggml_backend_t backend, const char * cache_dir,
 void ggml_backend_rpc_start_server(ggml_backend_t backend, const char * endpoint,
                                    const char * cache_dir,
                                    size_t free_mem, size_t total_mem) {
+    printf("Starting RPC server v%d.%d.%d\n",
+        RPC_PROTO_MAJOR_VERSION,
+        RPC_PROTO_MINOR_VERSION,
+        RPC_PROTO_PATCH_VERSION);
+    printf("  endpoint       : %s\n", endpoint);
+    printf("  local cache    : %s\n", cache_dir ? cache_dir : "n/a");
+    printf("  backend memory : %zu MB\n", free_mem / (1024 * 1024));
+
     std::string host;
     int port;
     if (!parse_endpoint(endpoint, host, port)) {
@@ -1753,6 +1761,9 @@ static void * ggml_backend_rpc_get_proc_address(ggml_backend_reg_t reg, const ch
     if (std::strcmp(name, "ggml_backend_rpc_add_device") == 0) {
         return (void *)ggml_backend_rpc_add_device;
     }
+    if (std::strcmp(name, "ggml_backend_rpc_start_server") == 0) {
+        return (void *)ggml_backend_rpc_start_server;
+    }
     return NULL;
 
     GGML_UNUSED(reg);