| /* |
| * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef OS_LINUX_VM_GLOBALS_LINUX_HPP |
| #define OS_LINUX_VM_GLOBALS_LINUX_HPP |
| |
| // |
| // Defines Linux specific flags. They are not available on other platforms. |
| // |
| #define RUNTIME_OS_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct) \ |
| product(bool, UseOprofile, false, \ |
| "enable support for Oprofile profiler") \ |
| \ |
| product(bool, UseLinuxPosixThreadCPUClocks, true, \ |
| "enable fast Linux Posix clocks where available") \ |
| /* NB: The default value of UseLinuxPosixThreadCPUClocks may be \ |
| overridden in Arguments::parse_each_vm_init_arg. */ \ |
| \ |
| product(bool, UseHugeTLBFS, false, \ |
| "Use MAP_HUGETLB for large pages") \ |
| \ |
| product(bool, UseTransparentHugePages, false, \ |
| "Use MADV_HUGEPAGE for large pages") \ |
| \ |
| product(bool, LoadExecStackDllInVMThread, true, \ |
| "Load DLLs with executable-stack attribute in the VM Thread") \ |
| \ |
| product(bool, UseSHM, false, \ |
| "Use SYSV shared memory for large pages") \ |
| \ |
| diagnostic(bool, PrintActiveCpus, false, \ |
| "Print the number of CPUs detected in os::active_processor_count") |
| |
| // |
| // Defines Linux-specific default values. The flags are available on all |
| // platforms, but they may have different default values on other platforms. |
| // |
| define_pd_global(bool, UseLargePages, false); |
| define_pd_global(bool, UseLargePagesIndividualAllocation, false); |
| define_pd_global(bool, UseOSErrorReporting, false); |
| define_pd_global(bool, UseThreadPriorities, true) ; |
| |
| #endif // OS_LINUX_VM_GLOBALS_LINUX_HPP |