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7086226: UseNUMA fails on old versions of windows

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Return correct answers from os::numa_*() for UMA machines or if NUMA API is not supported

Reviewed-by: johnc
This commit is contained in:
Igor Veresov 2011-09-07 18:58:33 -07:00
parent ed72e31727
commit 1940a13d31
1 changed files with 21 additions and 12 deletions
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33
hotspot/src/os/windows/vm/os_windows.cpp
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@ -2706,11 +2706,10 @@ static void cleanup_after_large_page_init() {
static bool numa_interleaving_init() {
bool success = false;
bool use_numa_specified = !FLAG_IS_DEFAULT(UseNUMA);
bool use_numa_interleaving_specified = !FLAG_IS_DEFAULT(UseNUMAInterleaving);
// print a warning if UseNUMA or UseNUMAInterleaving flag is specified on command line
bool warn_on_failure = use_numa_specified || use_numa_interleaving_specified;
// print a warning if UseNUMAInterleaving flag is specified on command line
bool warn_on_failure = use_numa_interleaving_specified;
# define WARN(msg) if (warn_on_failure) { warning(msg); }
// NUMAInterleaveGranularity cannot be less than vm_allocation_granularity (or _large_page_size if using large pages)
@ -2720,7 +2719,7 @@ static bool numa_interleaving_init() {
if (os::Kernel32Dll::NumaCallsAvailable()) {
if (numa_node_list_holder.build()) {
if (PrintMiscellaneous && Verbose) {
tty->print("NUMA UsedNodeCount=%d, namely ", os::numa_get_groups_num());
tty->print("NUMA UsedNodeCount=%d, namely ", numa_node_list_holder.get_count());
for (int i = 0; i < numa_node_list_holder.get_count(); i++) {
tty->print("%d ", numa_node_list_holder.get_node_list_entry(i));
}
@ -2734,7 +2733,6 @@ static bool numa_interleaving_init() {
WARN("NUMA Interleaving is not supported by the operating system.");
}
if (!success) {
if (use_numa_specified) WARN("...Ignoring UseNUMA flag.");
if (use_numa_interleaving_specified) WARN("...Ignoring UseNUMAInterleaving flag.");
}
return success;
@ -2816,7 +2814,8 @@ static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags,
prot);
} else {
// get the next node to use from the used_node_list
DWORD node = numa_node_list_holder.get_node_list_entry(count % os::numa_get_groups_num());
assert(numa_node_list_holder.get_count() > 0, "Multiple NUMA nodes expected");
DWORD node = numa_node_list_holder.get_node_list_entry(count % numa_node_list_holder.get_count());
p_new = (char *)os::Kernel32Dll::VirtualAllocExNuma(hProc,
next_alloc_addr,
bytes_to_rq,
@ -3132,15 +3131,21 @@ void os::free_memory(char *addr, size_t bytes) { }
void os::numa_make_global(char *addr, size_t bytes) { }
void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { }
bool os::numa_topology_changed() { return false; }
size_t os::numa_get_groups_num() { return numa_node_list_holder.get_count(); }
size_t os::numa_get_groups_num() { return MAX2(numa_node_list_holder.get_count(), 1); }
int os::numa_get_group_id() { return 0; }
size_t os::numa_get_leaf_groups(int *ids, size_t size) {
// check for size bigger than actual groups_num
size = MIN2(size, numa_get_groups_num());
for (int i = 0; i < (int)size; i++) {
ids[i] = numa_node_list_holder.get_node_list_entry(i);
if (numa_node_list_holder.get_count() == 0 && size > 0) {
// Provide an answer for UMA systems
ids[0] = 0;
return 1;
} else {
// check for size bigger than actual groups_num
size = MIN2(size, numa_get_groups_num());
for (int i = 0; i < (int)size; i++) {
ids[i] = numa_node_list_holder.get_node_list_entry(i);
}
return size;
}
return size;
}
bool os::get_page_info(char *start, page_info* info) {
@ -3768,6 +3773,10 @@ jint os::init_2(void) {
// initialize thread priority policy
prio_init();
if (UseNUMA && !ForceNUMA) {
UseNUMA = false; // We don't fully support this yet
}
if (UseNUMAInterleaving) {
// first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag
bool success = numa_interleaving_init();