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6791672: enable 1G and larger pages on solaris

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Reviewed-by: ysr, iveresov, johnc
This commit is contained in:
John Coomes 2011-08-17 10:32:53 -07:00
parent 183a935fcb
commit 2af4bb66d4
3 changed files with 32 additions and 12 deletions
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29
hotspot/src/os/solaris/vm/os_solaris.cpp
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@ -3252,7 +3252,6 @@ bool os::unguard_memory(char* addr, size_t bytes) {
// supported Solaris versions, this combination
// is equivalent to +UseISM -UseMPSS.
typedef int (*getpagesizes_func_type) (size_t[], int);
static size_t _large_page_size = 0;
bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
@ -3284,23 +3283,29 @@ static void insertion_sort_descending(size_t* array, int len) {
}
bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
getpagesizes_func_type getpagesizes_func =
CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes"));
if (getpagesizes_func == NULL) {
if (warn) {
warning("MPSS is not supported by the operating system.");
}
return false;
}
const unsigned int usable_count = VM_Version::page_size_count();
if (usable_count == 1) {
return false;
}
// Find the right getpagesizes interface. When solaris 11 is the minimum
// build platform, getpagesizes() (without the '2') can be called directly.
typedef int (*gps_t)(size_t[], int);
gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
if (gps_func == NULL) {
gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
if (gps_func == NULL) {
if (warn) {
warning("MPSS is not supported by the operating system.");
}
return false;
}
}
// Fill the array of page sizes.
int n = getpagesizes_func(_page_sizes, page_sizes_max);
int n = (*gps_func)(_page_sizes, page_sizes_max);
assert(n > 0, "Solaris bug?");
if (n == page_sizes_max) {
// Add a sentinel value (necessary only if the array was completely filled
// since it is static (zeroed at initialization)).
@ -3308,6 +3313,7 @@ bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
}
assert(_page_sizes[n] == 0, "missing sentinel");
trace_page_sizes("available page sizes", _page_sizes, n);
if (n == 1) return false; // Only one page size available.
@ -3337,6 +3343,7 @@ bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
}
*page_size = _page_sizes[0];
trace_page_sizes("usable page sizes", _page_sizes, end + 1);
return true;
}