benchmarks/lockhammer/src/alloc.c, alloc.h

Memory allocation routines using either posix_memalign or hugetlb page.

hugetlb page allocation using mmap() improves reproducibility
- using a hugepage lets the same physical address to be used run-to-run

Use pagemap.h to get the physical address of the obtained memory to help
identify that the same physical address is reused.

Change-Id: I070fafc4463b3e81a36bdc0d32e79b40af28c1b0

Author: jty2

benchmarks/lockhammer/include/alloc.h

@@ -0,0 +1,63 @@
+
+/*
+ * Copyright (c) 2017-2025, The Linux Foundation. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#ifndef ALLOC_H
+#define ALLOC_H
+
+enum {
+    HUGEPAGES_NONE,
+    HUGEPAGES_DEFAULT,
+    HUGEPAGES_64K,
+    HUGEPAGES_2M,
+    HUGEPAGES_32M,
+    HUGEPAGES_512M,
+    HUGEPAGES_1G,
+    HUGEPAGES_16G,
+    HUGEPAGES_MAX_ENUM
+};
+
+
+void * do_hugepage_alloc(int use_hugepages, size_t hugepage_req_physaddr, int verbose);
+void * do_alloc(size_t length, int use_hugepages, size_t nonhuge_alignment, size_t hugepage_req_physaddr, int verbose);
+void print_hugepage_physaddr_and_exit(void * mmap_ret);
+
+// hugepage flag parameter parsing
+int parse_hugepage_parameter(const char * optarg);
+const char * hugepage_map (int enum_param_value);
+
+// function prototypes used by osq_lock
+uintptr_t get_phys_addr(uintptr_t vaddr);
+
+#endif
+
+/* vim: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */