1 // --------------------------------------------------------------------------
4 // Markus Wittmann, 2016-2017
5 // RRZE, University of Erlangen-Nuremberg, Germany
6 // markus.wittmann -at- fau.de or hpc -at- rrze.fau.de
9 // LSS, University of Erlangen-Nuremberg, Germany
11 // This file is part of the Lattice Boltzmann Benchmark Kernels (LbmBenchKernels).
13 // LbmBenchKernels is free software: you can redistribute it and/or modify
14 // it under the terms of the GNU General Public License as published by
15 // the Free Software Foundation, either version 3 of the License, or
16 // (at your option) any later version.
18 // LbmBenchKernels is distributed in the hope that it will be useful,
19 // but WITHOUT ANY WARRANTY; without even the implied warranty of
20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 // GNU General Public License for more details.
23 // You should have received a copy of the GNU General Public License
24 // along with LbmBenchKernels. If not, see <http://www.gnu.org/licenses/>.
26 // --------------------------------------------------------------------------
27 // TODO: make configurable
28 #define HAVE_HUGE_PAGES
31 #ifdef HAVE_HUGE_PAGES
37 #include <string.h> // strerror
41 #ifdef HAVE_HUGE_PAGES
42 #include <sys/mman.h> // madvise
49 int MemAlloc(void ** ptr, size_t bytesToAlloc)
53 tmpPtr = malloc(bytesToAlloc);
55 if (tmpPtr == NULL) { // && bytesToAlloc != 0) {
56 Error("allocation of %lu bytes failed: %d - %s\n", bytesToAlloc, errno, strerror(errno));
65 int MemAllocAligned(void ** ptr, size_t bytesToAlloc, size_t alignmentBytes)
69 ret = posix_memalign(ptr, alignmentBytes, bytesToAlloc);
72 Error("allocation of %lu bytes aligned to %lu bytes failed: %d - %s\n", bytesToAlloc, alignmentBytes, errno, strerror(errno));
76 #ifdef HAVE_HUGE_PAGES
78 if (alignmentBytes % 4096 == 0) {
79 ret = madvise(*ptr, bytesToAlloc, MADV_HUGEPAGE);
83 Error("madvise(%p, %lu, MADV_HUGEPAGE) failed: %d - %s.\n", *ptr, bytesToAlloc, errno, strerror(errno));
93 int MemFree(void ** ptr)
104 int MemZero(void * ptr, size_t bytesToZero)
107 Assert(bytesToZero > 0);
109 memset(ptr, 0, bytesToZero);