5867 // If -XX:+VerboseInternalVMTests is enabled, print some explanatory messages.
5868 void TestReserveMemorySpecial_test() {
5869 if (!UseLargePages) {
5870 if (VerboseInternalVMTests) {
5871 gclog_or_tty->print("Skipping test because large pages are disabled");
5872 }
5873 return;
5874 }
5875 // save current value of globals
5876 bool old_use_large_pages_individual_allocation = UseLargePagesIndividualAllocation;
5877 bool old_use_numa_interleaving = UseNUMAInterleaving;
5878
5879 // set globals to make sure we hit the correct code path
5880 UseLargePagesIndividualAllocation = UseNUMAInterleaving = false;
5881
5882 // do an allocation at an address selected by the OS to get a good one.
5883 const size_t large_allocation_size = os::large_page_size() * 4;
5884 char* result = os::reserve_memory_special(large_allocation_size, os::large_page_size(), NULL, false);
5885 if (result == NULL) {
5886 if (VerboseInternalVMTests) {
5887 gclog_or_tty->print("Failed to allocate control block with size "SIZE_FORMAT". Skipping remainder of test.",
5888 large_allocation_size);
5889 }
5890 } else {
5891 os::release_memory_special(result, large_allocation_size);
5892
5893 // allocate another page within the recently allocated memory area which seems to be a good location. At least
5894 // we managed to get it once.
5895 const size_t expected_allocation_size = os::large_page_size();
5896 char* expected_location = result + os::large_page_size();
5897 char* actual_location = os::reserve_memory_special(expected_allocation_size, os::large_page_size(), expected_location, false);
5898 if (actual_location == NULL) {
5899 if (VerboseInternalVMTests) {
5900 gclog_or_tty->print("Failed to allocate any memory at "PTR_FORMAT" size "SIZE_FORMAT". Skipping remainder of test.",
5901 expected_location, large_allocation_size);
5902 }
5903 } else {
5904 // release memory
5905 os::release_memory_special(actual_location, expected_allocation_size);
5906 // only now check, after releasing any memory to avoid any leaks.
5907 assert(actual_location == expected_location,
5908 err_msg("Failed to allocate memory at requested location "PTR_FORMAT" of size "SIZE_FORMAT", is "PTR_FORMAT" instead",
5909 expected_location, expected_allocation_size, actual_location));
5910 }
5911 }
5912
5913 // restore globals
5914 UseLargePagesIndividualAllocation = old_use_large_pages_individual_allocation;
5915 UseNUMAInterleaving = old_use_numa_interleaving;
5916 }
5917 #endif // PRODUCT
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5867 // If -XX:+VerboseInternalVMTests is enabled, print some explanatory messages.
5868 void TestReserveMemorySpecial_test() {
5869 if (!UseLargePages) {
5870 if (VerboseInternalVMTests) {
5871 gclog_or_tty->print("Skipping test because large pages are disabled");
5872 }
5873 return;
5874 }
5875 // save current value of globals
5876 bool old_use_large_pages_individual_allocation = UseLargePagesIndividualAllocation;
5877 bool old_use_numa_interleaving = UseNUMAInterleaving;
5878
5879 // set globals to make sure we hit the correct code path
5880 UseLargePagesIndividualAllocation = UseNUMAInterleaving = false;
5881
5882 // do an allocation at an address selected by the OS to get a good one.
5883 const size_t large_allocation_size = os::large_page_size() * 4;
5884 char* result = os::reserve_memory_special(large_allocation_size, os::large_page_size(), NULL, false);
5885 if (result == NULL) {
5886 if (VerboseInternalVMTests) {
5887 gclog_or_tty->print("Failed to allocate control block with size " SIZE_FORMAT ". Skipping remainder of test.",
5888 large_allocation_size);
5889 }
5890 } else {
5891 os::release_memory_special(result, large_allocation_size);
5892
5893 // allocate another page within the recently allocated memory area which seems to be a good location. At least
5894 // we managed to get it once.
5895 const size_t expected_allocation_size = os::large_page_size();
5896 char* expected_location = result + os::large_page_size();
5897 char* actual_location = os::reserve_memory_special(expected_allocation_size, os::large_page_size(), expected_location, false);
5898 if (actual_location == NULL) {
5899 if (VerboseInternalVMTests) {
5900 gclog_or_tty->print("Failed to allocate any memory at " PTR_FORMAT " size " SIZE_FORMAT ". Skipping remainder of test.",
5901 expected_location, large_allocation_size);
5902 }
5903 } else {
5904 // release memory
5905 os::release_memory_special(actual_location, expected_allocation_size);
5906 // only now check, after releasing any memory to avoid any leaks.
5907 assert(actual_location == expected_location,
5908 err_msg("Failed to allocate memory at requested location " PTR_FORMAT " of size " SIZE_FORMAT ", is " PTR_FORMAT " instead",
5909 expected_location, expected_allocation_size, actual_location));
5910 }
5911 }
5912
5913 // restore globals
5914 UseLargePagesIndividualAllocation = old_use_large_pages_individual_allocation;
5915 UseNUMAInterleaving = old_use_numa_interleaving;
5916 }
5917 #endif // PRODUCT
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