5765 // If -XX:+VerboseInternalVMTests is enabled, print some explanatory messages.
5766 void TestReserveMemorySpecial_test() {
5767 if (!UseLargePages) {
5768 if (VerboseInternalVMTests) {
5769 gclog_or_tty->print("Skipping test because large pages are disabled");
5770 }
5771 return;
5772 }
5773 // save current value of globals
5774 bool old_use_large_pages_individual_allocation = UseLargePagesIndividualAllocation;
5775 bool old_use_numa_interleaving = UseNUMAInterleaving;
5776
5777 // set globals to make sure we hit the correct code path
5778 UseLargePagesIndividualAllocation = UseNUMAInterleaving = false;
5779
5780 // do an allocation at an address selected by the OS to get a good one.
5781 const size_t large_allocation_size = os::large_page_size() * 4;
5782 char* result = os::reserve_memory_special(large_allocation_size, os::large_page_size(), NULL, false);
5783 if (result == NULL) {
5784 if (VerboseInternalVMTests) {
5785 gclog_or_tty->print("Failed to allocate control block with size "SIZE_FORMAT". Skipping remainder of test.",
5786 large_allocation_size);
5787 }
5788 } else {
5789 os::release_memory_special(result, large_allocation_size);
5790
5791 // allocate another page within the recently allocated memory area which seems to be a good location. At least
5792 // we managed to get it once.
5793 const size_t expected_allocation_size = os::large_page_size();
5794 char* expected_location = result + os::large_page_size();
5795 char* actual_location = os::reserve_memory_special(expected_allocation_size, os::large_page_size(), expected_location, false);
5796 if (actual_location == NULL) {
5797 if (VerboseInternalVMTests) {
5798 gclog_or_tty->print("Failed to allocate any memory at "PTR_FORMAT" size "SIZE_FORMAT". Skipping remainder of test.",
5799 expected_location, large_allocation_size);
5800 }
5801 } else {
5802 // release memory
5803 os::release_memory_special(actual_location, expected_allocation_size);
5804 // only now check, after releasing any memory to avoid any leaks.
5805 assert(actual_location == expected_location,
5806 err_msg("Failed to allocate memory at requested location "PTR_FORMAT" of size "SIZE_FORMAT", is "PTR_FORMAT" instead",
5807 expected_location, expected_allocation_size, actual_location));
5808 }
5809 }
5810
5811 // restore globals
5812 UseLargePagesIndividualAllocation = old_use_large_pages_individual_allocation;
5813 UseNUMAInterleaving = old_use_numa_interleaving;
5814 }
5815 #endif // PRODUCT
5816
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5765 // If -XX:+VerboseInternalVMTests is enabled, print some explanatory messages.
5766 void TestReserveMemorySpecial_test() {
5767 if (!UseLargePages) {
5768 if (VerboseInternalVMTests) {
5769 gclog_or_tty->print("Skipping test because large pages are disabled");
5770 }
5771 return;
5772 }
5773 // save current value of globals
5774 bool old_use_large_pages_individual_allocation = UseLargePagesIndividualAllocation;
5775 bool old_use_numa_interleaving = UseNUMAInterleaving;
5776
5777 // set globals to make sure we hit the correct code path
5778 UseLargePagesIndividualAllocation = UseNUMAInterleaving = false;
5779
5780 // do an allocation at an address selected by the OS to get a good one.
5781 const size_t large_allocation_size = os::large_page_size() * 4;
5782 char* result = os::reserve_memory_special(large_allocation_size, os::large_page_size(), NULL, false);
5783 if (result == NULL) {
5784 if (VerboseInternalVMTests) {
5785 gclog_or_tty->print("Failed to allocate control block with size " SIZE_FORMAT ". Skipping remainder of test.",
5786 large_allocation_size);
5787 }
5788 } else {
5789 os::release_memory_special(result, large_allocation_size);
5790
5791 // allocate another page within the recently allocated memory area which seems to be a good location. At least
5792 // we managed to get it once.
5793 const size_t expected_allocation_size = os::large_page_size();
5794 char* expected_location = result + os::large_page_size();
5795 char* actual_location = os::reserve_memory_special(expected_allocation_size, os::large_page_size(), expected_location, false);
5796 if (actual_location == NULL) {
5797 if (VerboseInternalVMTests) {
5798 gclog_or_tty->print("Failed to allocate any memory at " PTR_FORMAT " size " SIZE_FORMAT ". Skipping remainder of test.",
5799 expected_location, large_allocation_size);
5800 }
5801 } else {
5802 // release memory
5803 os::release_memory_special(actual_location, expected_allocation_size);
5804 // only now check, after releasing any memory to avoid any leaks.
5805 assert(actual_location == expected_location,
5806 err_msg("Failed to allocate memory at requested location " PTR_FORMAT " of size " SIZE_FORMAT ", is " PTR_FORMAT " instead",
5807 expected_location, expected_allocation_size, actual_location));
5808 }
5809 }
5810
5811 // restore globals
5812 UseLargePagesIndividualAllocation = old_use_large_pages_individual_allocation;
5813 UseNUMAInterleaving = old_use_numa_interleaving;
5814 }
5815 #endif // PRODUCT
5816
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