120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
/*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* Copyright (c) 2018 Cyril Hrubis <chrubis@suse.cz>
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*/
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/*
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* We are testing set_mempolicy() with MPOL_INTERLEAVE.
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*
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* The test tries different subsets of memory nodes, sets the mask with
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* memopolicy, and checks that the memory was interleaved between the nodes
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* accordingly.
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*/
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#include <errno.h>
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#include "config.h"
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#ifdef HAVE_NUMA_V2
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# include <numa.h>
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# include <numaif.h>
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#endif
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#include "tst_test.h"
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#include "tst_numa.h"
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#ifdef HAVE_NUMA_V2
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#include "set_mempolicy.h"
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#define ALLOC_ON_NODE 8
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static size_t page_size;
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static struct tst_nodemap *nodes;
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static void setup(void)
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{
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page_size = getpagesize();
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nodes = tst_get_nodemap(TST_NUMA_MEM, 2 * ALLOC_ON_NODE * page_size / 1024);
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if (nodes->cnt <= 1)
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tst_brk(TCONF, "Test requires at least two NUMA memory nodes");
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}
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static void cleanup(void)
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{
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tst_nodemap_free(nodes);
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}
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static void alloc_and_check(size_t size, unsigned int *exp_alloc)
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{
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unsigned int i;
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const char *prefix = "child: ";
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if (SAFE_FORK()) {
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prefix = "parent: ";
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tst_reap_children();
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}
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tst_nodemap_reset_counters(nodes);
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alloc_fault_count(nodes, NULL, size * page_size);
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for (i = 0; i < nodes->cnt; i++) {
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if (nodes->counters[i] == exp_alloc[i]) {
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tst_res(TPASS, "%sNode %u allocated %u",
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prefix, nodes->map[i], exp_alloc[i]);
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} else {
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tst_res(TFAIL, "%sNode %u allocated %u, expected %u",
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prefix, nodes->map[i], nodes->counters[i],
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exp_alloc[i]);
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}
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}
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}
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static void verify_set_mempolicy(unsigned int n)
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{
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struct bitmask *bm = numa_allocate_nodemask();
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unsigned int exp_alloc[nodes->cnt];
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unsigned int alloc_per_node = n ? ALLOC_ON_NODE : 2;
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unsigned int alloc_on_nodes = n ? 2 : nodes->cnt;
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unsigned int alloc_total = alloc_per_node * alloc_on_nodes;
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unsigned int i;
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memset(exp_alloc, 0, sizeof(exp_alloc));
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for (i = 0; i < alloc_on_nodes; i++) {
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exp_alloc[i] = alloc_per_node;
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numa_bitmask_setbit(bm, nodes->map[i]);
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}
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TEST(set_mempolicy(MPOL_INTERLEAVE, bm->maskp, bm->size+1));
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tst_res(TINFO, "Allocating on nodes 1-%u - %u pages",
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alloc_on_nodes, alloc_total);
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if (TST_RET) {
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tst_res(TFAIL | TTERRNO,
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"set_mempolicy(MPOL_INTERLEAVE)");
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return;
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}
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tst_res(TPASS, "set_mempolicy(MPOL_INTERLEAVE)");
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numa_free_nodemask(bm);
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alloc_and_check(alloc_total, exp_alloc);
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}
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static struct tst_test test = {
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.setup = setup,
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.cleanup = cleanup,
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.test = verify_set_mempolicy,
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.tcnt = 2,
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.forks_child = 1,
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.needs_checkpoints = 1,
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};
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#else
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TST_TEST_TCONF(NUMA_ERROR_MSG);
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#endif /* HAVE_NUMA_V2 */
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