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/*
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* Copyright (c) 2018 - 2019 Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY LOG OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <memkind.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define PMEM_MAX_SIZE (1024 * 1024 * 32)
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static char path[PATH_MAX] = "/tmp/";
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static void print_err_message(int err)
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{
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char error_message[MEMKIND_ERROR_MESSAGE_SIZE];
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memkind_error_message(err, error_message, MEMKIND_ERROR_MESSAGE_SIZE);
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fprintf(stderr, "%s\n", error_message);
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}
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int main(int argc, char *argv[])
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{
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struct memkind *pmem_kind = NULL;
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int err = 0;
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if (argc > 2) {
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fprintf(stderr, "Usage: %s [pmem_kind_dir_path]\n", argv[0]);
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return 1;
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} else if (argc == 2 && (realpath(argv[1], path) == NULL)) {
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fprintf(stderr, "Incorrect pmem_kind_dir_path %s\n", argv[1]);
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return 1;
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}
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fprintf(stdout,
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"This example shows how to use memkind alignment and how it affects allocations.\nPMEM kind directory: %s\n",
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path);
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err = memkind_create_pmem(path, PMEM_MAX_SIZE, &pmem_kind);
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if (err) {
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print_err_message(err);
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return 1;
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}
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char *pmem_str10 = NULL;
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char *pmem_str11 = NULL;
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// Perform two allocations - 32 bytes
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pmem_str10 = (char *)memkind_malloc(pmem_kind, 32);
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if (pmem_str10 == NULL) {
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fprintf(stderr, "Unable to allocate pmem string (pmem_str10).\n");
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return 1;
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}
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pmem_str11 = (char *)memkind_malloc(pmem_kind, 32);
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if (pmem_str11 == NULL) {
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fprintf(stderr, "Unable to allocate pmem string (pmem_str11)\n");
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return 1;
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}
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// The allocations should be very close to each other in memory
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if (pmem_str11 - pmem_str10 != 32) {
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fprintf(stderr, "Something went wrong with allocations.\n");
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return 1;
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}
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memkind_free(pmem_kind, pmem_str10);
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memkind_free(pmem_kind, pmem_str11);
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// Perform two allocations - 32 bytes with alignment 64
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err = memkind_posix_memalign(pmem_kind, (void **)&pmem_str10, 64, 32);
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if (err) {
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fprintf(stderr,
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"Unable to allocate pmem string (pmem_str10) with alignment.\n");
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return 1;
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}
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err = memkind_posix_memalign(pmem_kind, (void **)&pmem_str11, 64, 32);
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if (err) {
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fprintf(stderr,
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"Unable to allocate pmem string (pmem_str11) with alignment.\n");
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return 1;
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}
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// The addresses of allocations are not close to each other in memory, they are aligned to 64
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if (pmem_str11 - pmem_str10 != 64) {
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fprintf(stderr, "Something went wrong with alignment allocations.\n");
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return 1;
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}
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memkind_free(pmem_kind, pmem_str10);
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memkind_free(pmem_kind, pmem_str11);
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err = memkind_destroy_kind(pmem_kind);
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if (err) {
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print_err_message(err);
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return 1;
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}
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fprintf(stdout,
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"The memory has been successfully allocated using memkind alignment.\n");
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return 0;
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}
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