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6629887: 64-bit windows should not restrict default heap size to 1400m

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Reviewed-by: jmasa, sbohne, ikrylov, xlu
This commit is contained in:
Paul Hohensee 2007-12-05 09:04:00 -08:00
parent b3b837074b
commit 4576d7abf7
3 changed files with 19 additions and 15 deletions
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14
hotspot/src/os/linux/vm/os_linux.cpp
View File

@ -116,6 +116,20 @@ julong os::physical_memory() {
return Linux::physical_memory();
}
julong os::allocatable_physical_memory(julong size) {
#ifdef _LP64
return size;
#else
julong result = MIN2(size, (julong)3800*M);
if (!is_allocatable(result)) {
// See comments under solaris for alignment considerations
julong reasonable_size = (julong)2*G - 2 * os::vm_page_size();
result = MIN2(size, reasonable_size);
}
return result;
#endif // _LP64
}
////////////////////////////////////////////////////////////////////////////////
// environment support

5
hotspot/src/os/windows/vm/os_windows.cpp
View File

@ -621,7 +621,12 @@ julong os::physical_memory() {
}
julong os::allocatable_physical_memory(julong size) {
#ifdef _LP64
return size;
#else
// Limit to 1400m because of the 2gb address space wall
return MIN2(size, (julong)1400*M);
#endif
}
// VC6 lacks DWORD_PTR

15
hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp
View File

@ -157,23 +157,8 @@ frame os::current_frame() {
}
}
// Utility functions
julong os::allocatable_physical_memory(julong size) {
#ifdef AMD64
return size;
#else
julong result = MIN2(size, (julong)3800*M);
if (!is_allocatable(result)) {
// See comments under solaris for alignment considerations
julong reasonable_size = (julong)2*G - 2 * os::vm_page_size();
result = MIN2(size, reasonable_size);
}
return result;
#endif // AMD64
}
// From IA32 System Programming Guide
enum {
trap_page_fault = 0xE