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8189922: UseNUMA memory interleaving vs membind

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Reviewed-by: gromero, drwhite, dholmes, tschatzl
This commit is contained in:
Swati Sharma 2018-07-19 16:56:05 -04:00 • committed by Gustavo Romero
parent 39cd4bdd52
commit 0440d172a0
2 changed files with 61 additions and 12 deletions
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42
src/hotspot/os/linux/os_linux.hpp
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@ -228,6 +228,7 @@ class Linux {
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 struct bitmask* (*numa_get_membind_func_t)(void);
typedef void (*numa_set_bind_policy_func_t)(int policy);
typedef int (*numa_bitmask_isbitset_func_t)(struct bitmask *bmp, unsigned int n);
@ -244,6 +245,7 @@ class Linux {
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;
static numa_get_membind_func_t _numa_get_membind;
static unsigned long* _numa_all_nodes;
static struct bitmask* _numa_all_nodes_ptr;
static struct bitmask* _numa_nodes_ptr;
@ -259,6 +261,7 @@ class Linux {
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; }
static void set_numa_get_membind(numa_get_membind_func_t func) { _numa_get_membind = func; }
static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
static void set_numa_all_nodes_ptr(struct bitmask **ptr) { _numa_all_nodes_ptr = (ptr == NULL ? NULL : *ptr); }
static void set_numa_nodes_ptr(struct bitmask **ptr) { _numa_nodes_ptr = (ptr == NULL ? NULL : *ptr); }
@ -299,7 +302,7 @@ class Linux {
if (_numa_bitmask_isbitset != NULL && _numa_all_nodes_ptr != NULL) {
return _numa_bitmask_isbitset(_numa_all_nodes_ptr, n);
} else
return 0;
return false;
}
// Check if numa node exists in the system (including zero memory nodes).
static bool isnode_in_existing_nodes(unsigned int n) {
@ -318,7 +321,42 @@ class Linux {
// substitute.
return _numa_bitmask_isbitset(_numa_all_nodes_ptr, n);
} else
return 0;
return false;
}
// Check if node is in bound node set.
static bool isnode_in_bound_nodes(int node) {
if (_numa_get_membind != NULL && _numa_bitmask_isbitset != NULL) {
return _numa_bitmask_isbitset(_numa_get_membind(), node);
} else {
return false;
}
}
// Check if bound to only one numa node.
// Returns true if bound to a single numa node, otherwise returns false.
static bool isbound_to_single_node() {
int nodes = 0;
struct bitmask* bmp = NULL;
unsigned int node = 0;
unsigned int highest_node_number = 0;
if (_numa_get_membind != NULL && _numa_max_node != NULL && _numa_bitmask_isbitset != NULL) {
bmp = _numa_get_membind();
highest_node_number = _numa_max_node();
} else {
return false;
}
for (node = 0; node <= highest_node_number; node++) {
if (_numa_bitmask_isbitset(bmp, node)) {
nodes++;
}
}
if (nodes == 1) {
return true;
} else {
return false;
}
}
};