# HG changeset patch
# User dholmes
# Date 1496283678 0
# Node ID 4a5b7a2dd7833bec679ebb5ce1804a35cd69cb8c
# Parent  b32d3928ad6a8a2530efa19490555a251341a410# Parent  8cc204b35e392201cdf7cd305419a254d790003d
Merge

diff -r b32d3928ad6a -r 4a5b7a2dd783 hotspot/src/os/linux/vm/os_linux.cpp
--- a/hotspot/src/os/linux/vm/os_linux.cpp	Wed May 31 18:20:20 2017 -0700
+++ b/hotspot/src/os/linux/vm/os_linux.cpp	Thu Jun 01 02:21:18 2017 +0000
@@ -2819,11 +2819,8 @@
 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { }
 extern "C" JNIEXPORT void numa_error(char *where) { }
 
-
-// If we are running with libnuma version > 2, then we should
-// be trying to use symbols with versions 1.1
-// If we are running with earlier version, which did not have symbol versions,
-// we should use the base version.
+// Handle request to load libnuma symbol version 1.1 (API v1). If it fails
+// load symbol from base version instead.
 void* os::Linux::libnuma_dlsym(void* handle, const char *name) {
   void *f = dlvsym(handle, name, "libnuma_1.1");
   if (f == NULL) {
@@ -2832,6 +2829,12 @@
   return f;
 }
 
+// Handle request to load libnuma symbol version 1.2 (API v2) only.
+// Return NULL if the symbol is not defined in this particular version.
+void* os::Linux::libnuma_v2_dlsym(void* handle, const char* name) {
+  return dlvsym(handle, name, "libnuma_1.2");
+}
+
 bool os::Linux::libnuma_init() {
   // sched_getcpu() should be in libc.
   set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t,
@@ -2858,6 +2861,8 @@
                                             libnuma_dlsym(handle, "numa_tonode_memory")));
       set_numa_interleave_memory(CAST_TO_FN_PTR(numa_interleave_memory_func_t,
                                                 libnuma_dlsym(handle, "numa_interleave_memory")));
+      set_numa_interleave_memory_v2(CAST_TO_FN_PTR(numa_interleave_memory_v2_func_t,
+                                                libnuma_v2_dlsym(handle, "numa_interleave_memory")));
       set_numa_set_bind_policy(CAST_TO_FN_PTR(numa_set_bind_policy_func_t,
                                               libnuma_dlsym(handle, "numa_set_bind_policy")));
       set_numa_bitmask_isbitset(CAST_TO_FN_PTR(numa_bitmask_isbitset_func_t,
@@ -2984,6 +2989,7 @@
 os::Linux::numa_available_func_t os::Linux::_numa_available;
 os::Linux::numa_tonode_memory_func_t os::Linux::_numa_tonode_memory;
 os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory;
+os::Linux::numa_interleave_memory_v2_func_t os::Linux::_numa_interleave_memory_v2;
 os::Linux::numa_set_bind_policy_func_t os::Linux::_numa_set_bind_policy;
 os::Linux::numa_bitmask_isbitset_func_t os::Linux::_numa_bitmask_isbitset;
 os::Linux::numa_distance_func_t os::Linux::_numa_distance;
diff -r b32d3928ad6a -r 4a5b7a2dd783 hotspot/src/os/linux/vm/os_linux.hpp
--- a/hotspot/src/os/linux/vm/os_linux.hpp	Wed May 31 18:20:20 2017 -0700
+++ b/hotspot/src/os/linux/vm/os_linux.hpp	Thu Jun 01 02:21:18 2017 +0000
@@ -172,6 +172,8 @@
   static void libpthread_init();
   static bool libnuma_init();
   static void* libnuma_dlsym(void* handle, const char* name);
+  // libnuma v2 (libnuma_1.2) symbols
+  static void* libnuma_v2_dlsym(void* handle, const char* name);
 
   // Return default guard size for the specified thread type
   static size_t default_guard_size(os::ThreadType thr_type);
@@ -218,6 +220,8 @@
   typedef int (*numa_available_func_t)(void);
   typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
   typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
+  typedef void (*numa_interleave_memory_v2_func_t)(void *start, size_t size, struct bitmask* mask);
+
   typedef void (*numa_set_bind_policy_func_t)(int policy);
   typedef int (*numa_bitmask_isbitset_func_t)(struct bitmask *bmp, unsigned int n);
   typedef int (*numa_distance_func_t)(int node1, int node2);
@@ -229,6 +233,7 @@
   static numa_available_func_t _numa_available;
   static numa_tonode_memory_func_t _numa_tonode_memory;
   static numa_interleave_memory_func_t _numa_interleave_memory;
+  static numa_interleave_memory_v2_func_t _numa_interleave_memory_v2;
   static numa_set_bind_policy_func_t _numa_set_bind_policy;
   static numa_bitmask_isbitset_func_t _numa_bitmask_isbitset;
   static numa_distance_func_t _numa_distance;
@@ -243,6 +248,7 @@
   static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
   static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
   static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
+  static void set_numa_interleave_memory_v2(numa_interleave_memory_v2_func_t func) { _numa_interleave_memory_v2 = func; }
   static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; }
   static void set_numa_bitmask_isbitset(numa_bitmask_isbitset_func_t func) { _numa_bitmask_isbitset = func; }
   static void set_numa_distance(numa_distance_func_t func) { _numa_distance = func; }
@@ -264,7 +270,10 @@
     return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
   }
   static void numa_interleave_memory(void *start, size_t size) {
-    if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
+    // Use v2 api if available
+    if (_numa_interleave_memory_v2 != NULL && _numa_all_nodes_ptr != NULL) {
+      _numa_interleave_memory_v2(start, size, _numa_all_nodes_ptr);
+    } else if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
       _numa_interleave_memory(start, size, _numa_all_nodes);
     }
   }