1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
#include "test/jemalloc_test.h"
/* Config -- "narenas:1,bin_shards:1-160:16|129-512:4|256-256:8" */
#define NTHREADS 16
#define REMOTE_NALLOC 256
static void *
thd_producer(void *varg) {
void **mem = varg;
unsigned arena, i;
size_t sz;
sz = sizeof(arena);
/* Remote arena. */
expect_d_eq(mallctl("arenas.create", (void *)&arena, &sz, NULL, 0), 0,
"Unexpected mallctl() failure");
for (i = 0; i < REMOTE_NALLOC / 2; i++) {
mem[i] = mallocx(1, MALLOCX_TCACHE_NONE | MALLOCX_ARENA(arena));
}
/* Remote bin. */
for (; i < REMOTE_NALLOC; i++) {
mem[i] = mallocx(1, MALLOCX_TCACHE_NONE | MALLOCX_ARENA(0));
}
return NULL;
}
TEST_BEGIN(test_producer_consumer) {
thd_t thds[NTHREADS];
void *mem[NTHREADS][REMOTE_NALLOC];
unsigned i;
/* Create producer threads to allocate. */
for (i = 0; i < NTHREADS; i++) {
thd_create(&thds[i], thd_producer, mem[i]);
}
for (i = 0; i < NTHREADS; i++) {
thd_join(thds[i], NULL);
}
/* Remote deallocation by the current thread. */
for (i = 0; i < NTHREADS; i++) {
for (unsigned j = 0; j < REMOTE_NALLOC; j++) {
expect_ptr_not_null(mem[i][j],
"Unexpected remote allocation failure");
dallocx(mem[i][j], 0);
}
}
}
TEST_END
static void *
thd_start(void *varg) {
void *ptr, *ptr2;
edata_t *edata;
unsigned shard1, shard2;
tsdn_t *tsdn = tsdn_fetch();
/* Try triggering allocations from sharded bins. */
for (unsigned i = 0; i < 1024; i++) {
ptr = mallocx(1, MALLOCX_TCACHE_NONE);
ptr2 = mallocx(129, MALLOCX_TCACHE_NONE);
edata = emap_edata_lookup(tsdn, &arena_emap_global, ptr);
shard1 = edata_binshard_get(edata);
dallocx(ptr, 0);
expect_u_lt(shard1, 16, "Unexpected bin shard used");
edata = emap_edata_lookup(tsdn, &arena_emap_global, ptr2);
shard2 = edata_binshard_get(edata);
dallocx(ptr2, 0);
expect_u_lt(shard2, 4, "Unexpected bin shard used");
if (shard1 > 0 || shard2 > 0) {
/* Triggered sharded bin usage. */
return (void *)(uintptr_t)shard1;
}
}
return NULL;
}
TEST_BEGIN(test_bin_shard_mt) {
test_skip_if(have_percpu_arena &&
PERCPU_ARENA_ENABLED(opt_percpu_arena));
thd_t thds[NTHREADS];
unsigned i;
for (i = 0; i < NTHREADS; i++) {
thd_create(&thds[i], thd_start, NULL);
}
bool sharded = false;
for (i = 0; i < NTHREADS; i++) {
void *ret;
thd_join(thds[i], &ret);
if (ret != NULL) {
sharded = true;
}
}
expect_b_eq(sharded, true, "Did not find sharded bins");
}
TEST_END
TEST_BEGIN(test_bin_shard) {
unsigned nbins, i;
size_t mib[4], mib2[4];
size_t miblen, miblen2, len;
len = sizeof(nbins);
expect_d_eq(mallctl("arenas.nbins", (void *)&nbins, &len, NULL, 0), 0,
"Unexpected mallctl() failure");
miblen = 4;
expect_d_eq(mallctlnametomib("arenas.bin.0.nshards", mib, &miblen), 0,
"Unexpected mallctlnametomib() failure");
miblen2 = 4;
expect_d_eq(mallctlnametomib("arenas.bin.0.size", mib2, &miblen2), 0,
"Unexpected mallctlnametomib() failure");
for (i = 0; i < nbins; i++) {
uint32_t nshards;
size_t size, sz1, sz2;
mib[2] = i;
sz1 = sizeof(nshards);
expect_d_eq(mallctlbymib(mib, miblen, (void *)&nshards, &sz1,
NULL, 0), 0, "Unexpected mallctlbymib() failure");
mib2[2] = i;
sz2 = sizeof(size);
expect_d_eq(mallctlbymib(mib2, miblen2, (void *)&size, &sz2,
NULL, 0), 0, "Unexpected mallctlbymib() failure");
if (size >= 1 && size <= 128) {
expect_u_eq(nshards, 16, "Unexpected nshards");
} else if (size == 256) {
expect_u_eq(nshards, 8, "Unexpected nshards");
} else if (size > 128 && size <= 512) {
expect_u_eq(nshards, 4, "Unexpected nshards");
} else {
expect_u_eq(nshards, 1, "Unexpected nshards");
}
}
}
TEST_END
int
main(void) {
return test_no_reentrancy(
test_bin_shard,
test_bin_shard_mt,
test_producer_consumer);
}
|
