enable sched debug

Author: gianni-cor

ggml/src/ggml-backend.cpp

@@ -1,5 +1,6 @@
 // Note: porting this file to C++ is a work in progress
 
+#include <cstdio>
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
 #ifndef NOMINMAX
@@ -1612,7 +1613,11 @@ ggml_backend_sched_t ggml_backend_sched_new(
 
     struct ggml_backend_sched * sched = (ggml_backend_sched *) calloc(1, sizeof(struct ggml_backend_sched));
 
+#ifndef FORCE_GGML_VK_PERF_LOGGER
     const char * GGML_SCHED_DEBUG = getenv("GGML_SCHED_DEBUG");
+#else
+    GGML_SCHED_DEBUG = "2";
+#endif
     sched->debug = GGML_SCHED_DEBUG ? atoi(GGML_SCHED_DEBUG) : 0;
     sched->n_backends = n_backends;
     sched->n_copies = parallel ? GGML_SCHED_MAX_COPIES : 1;