55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2019 Red Hat, Inc.
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*/
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#ifndef TST_HUGEPAGE__
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#define TST_HUGEPAGE__
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#define PATH_HUGEPAGES "/sys/kernel/mm/hugepages/"
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#define PATH_NR_HPAGES "/proc/sys/vm/nr_hugepages"
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#define PATH_OC_HPAGES "/proc/sys/vm/nr_overcommit_hugepages"
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#define MEMINFO_HPAGE_TOTAL "HugePages_Total:"
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#define MEMINFO_HPAGE_FREE "HugePages_Free:"
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#define MEMINFO_HPAGE_RSVD "HugePages_Rsvd:"
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#define MEMINFO_HPAGE_SURP "HugePages_Surp:"
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#define MEMINFO_HPAGE_SIZE "Hugepagesize:"
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extern char *nr_opt; /* -s num Set the number of the been allocated hugepages */
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extern char *Hopt; /* -H /.. Location of hugetlbfs, i.e. -H /var/hugetlbfs */
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enum tst_hp_policy {
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TST_REQUEST,
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TST_NEEDS,
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};
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struct tst_hugepage {
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const unsigned long number;
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enum tst_hp_policy policy;
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};
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/*
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* Get the default hugepage size. Returns 0 if hugepages are not supported.
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*/
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size_t tst_get_hugepage_size(void);
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/*
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* Try the best to request a specified number of huge pages from system,
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* it will store the reserved hpage number in tst_hugepages.
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*
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* Note: this depend on the status of system memory fragmentation.
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*/
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unsigned long tst_reserve_hugepages(struct tst_hugepage *hp);
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/*
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* This variable is used for recording the number of hugepages which system can
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* provides. It will be equal to 'hpages' if tst_reserve_hugepages on success,
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* otherwise set it to a number of hugepages that we were able to reserve.
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*
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* If system does not support hugetlb, then it will be set to 0.
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*/
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extern unsigned long tst_hugepages;
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#endif /* TST_HUGEPAGE_H */
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