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/* Copyright (C) 2023 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Lukas Sismis <lsismis@oisf.net>
*/
#ifndef UTIL_HUGEPAGES_H
#define UTIL_HUGEPAGES_H
typedef struct {
uint32_t size_kb;
uint16_t allocated;
uint16_t free;
} HugepageInfo;
// Structure to hold information about individual NUMA nodes in the system and
// and their respective allocated hugepages
// So for e.g. NUMA node 0 there can be 2 hugepage_size - 2 MB and 1 GB
// Each hugepage size will then have a record of number of allocated/free hpages
typedef struct {
uint16_t num_hugepage_sizes;
HugepageInfo *hugepages;
} NodeInfo;
// Structure to hold information about all hugepage sizes residing on all NUMA
// nodes in the system
typedef struct {
uint16_t num_nodes;
NodeInfo *nodes;
} SystemHugepageSnapshot;
SystemHugepageSnapshot *SystemHugepageSnapshotCreate(void);
void SystemHugepageSnapshotDestroy(SystemHugepageSnapshot *s);
void SystemHugepageEvaluateHugepages(SystemHugepageSnapshot *pre_s, SystemHugepageSnapshot *post_s);
#endif /* UTIL_HUGEPAGES_H */
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