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1a95404f EC |
1 | /* |
2 | * Copyright (C) 2016, Emilio G. Cota <cota@braap.org> | |
3 | * | |
4 | * License: GNU GPL, version 2 or later. | |
5 | * See the COPYING file in the top-level directory. | |
6 | */ | |
7 | #include "qemu/osdep.h" | |
1a95404f | 8 | #include "qemu/qht.h" |
9c7d64eb | 9 | #include "qemu/rcu.h" |
1a95404f EC |
10 | |
11 | #define N 5000 | |
12 | ||
13 | static struct qht ht; | |
14 | static int32_t arr[N * 2]; | |
15 | ||
61b8cef1 | 16 | static bool is_equal(const void *ap, const void *bp) |
1a95404f | 17 | { |
61b8cef1 EC |
18 | const int32_t *a = ap; |
19 | const int32_t *b = bp; | |
1a95404f EC |
20 | |
21 | return *a == *b; | |
22 | } | |
23 | ||
24 | static void insert(int a, int b) | |
25 | { | |
26 | int i; | |
27 | ||
28 | for (i = a; i < b; i++) { | |
29 | uint32_t hash; | |
32359d52 EC |
30 | void *existing; |
31 | bool inserted; | |
1a95404f EC |
32 | |
33 | arr[i] = i; | |
34 | hash = i; | |
35 | ||
32359d52 EC |
36 | inserted = qht_insert(&ht, &arr[i], hash, NULL); |
37 | g_assert_true(inserted); | |
38 | inserted = qht_insert(&ht, &arr[i], hash, &existing); | |
39 | g_assert_false(inserted); | |
40 | g_assert_true(existing == &arr[i]); | |
1a95404f EC |
41 | } |
42 | } | |
43 | ||
44 | static void rm(int init, int end) | |
45 | { | |
46 | int i; | |
47 | ||
48 | for (i = init; i < end; i++) { | |
49 | uint32_t hash; | |
50 | ||
51 | hash = arr[i]; | |
52 | g_assert_true(qht_remove(&ht, &arr[i], hash)); | |
53 | } | |
54 | } | |
55 | ||
56 | static void check(int a, int b, bool expected) | |
57 | { | |
58 | struct qht_stats stats; | |
59 | int i; | |
60 | ||
9c7d64eb | 61 | rcu_read_lock(); |
1a95404f EC |
62 | for (i = a; i < b; i++) { |
63 | void *p; | |
64 | uint32_t hash; | |
65 | int32_t val; | |
66 | ||
67 | val = i; | |
68 | hash = i; | |
61b8cef1 EC |
69 | /* test both lookup variants; results should be the same */ |
70 | if (i % 2) { | |
71 | p = qht_lookup(&ht, &val, hash); | |
72 | } else { | |
73 | p = qht_lookup_custom(&ht, &val, hash, is_equal); | |
74 | } | |
1a95404f EC |
75 | g_assert_true(!!p == expected); |
76 | } | |
9c7d64eb EC |
77 | rcu_read_unlock(); |
78 | ||
1a95404f EC |
79 | qht_statistics_init(&ht, &stats); |
80 | if (stats.used_head_buckets) { | |
81 | g_assert_cmpfloat(qdist_avg(&stats.chain), >=, 1.0); | |
82 | } | |
83 | g_assert_cmpuint(stats.head_buckets, >, 0); | |
84 | qht_statistics_destroy(&stats); | |
85 | } | |
86 | ||
87 | static void count_func(struct qht *ht, void *p, uint32_t hash, void *userp) | |
88 | { | |
89 | unsigned int *curr = userp; | |
90 | ||
91 | (*curr)++; | |
92 | } | |
93 | ||
94 | static void check_n(size_t expected) | |
95 | { | |
96 | struct qht_stats stats; | |
97 | ||
98 | qht_statistics_init(&ht, &stats); | |
99 | g_assert_cmpuint(stats.entries, ==, expected); | |
100 | qht_statistics_destroy(&stats); | |
101 | } | |
102 | ||
103 | static void iter_check(unsigned int count) | |
104 | { | |
105 | unsigned int curr = 0; | |
106 | ||
107 | qht_iter(&ht, count_func, &curr); | |
108 | g_assert_cmpuint(curr, ==, count); | |
109 | } | |
110 | ||
922034e7 EC |
111 | static void sum_func(struct qht *ht, void *p, uint32_t hash, void *userp) |
112 | { | |
113 | uint32_t *sum = userp; | |
114 | uint32_t a = *(uint32_t *)p; | |
115 | ||
116 | *sum += a; | |
117 | } | |
118 | ||
119 | static void iter_sum_check(unsigned int expected) | |
120 | { | |
121 | unsigned int sum = 0; | |
122 | ||
123 | qht_iter(&ht, sum_func, &sum); | |
124 | g_assert_cmpuint(sum, ==, expected); | |
125 | } | |
126 | ||
127 | static bool rm_mod_func(struct qht *ht, void *p, uint32_t hash, void *userp) | |
128 | { | |
129 | uint32_t a = *(uint32_t *)p; | |
130 | unsigned int mod = *(unsigned int *)userp; | |
131 | ||
132 | return a % mod == 0; | |
133 | } | |
134 | ||
135 | static void iter_rm_mod(unsigned int mod) | |
136 | { | |
137 | qht_iter_remove(&ht, rm_mod_func, &mod); | |
138 | } | |
139 | ||
140 | static void iter_rm_mod_check(unsigned int mod) | |
141 | { | |
142 | unsigned int expected = 0; | |
143 | unsigned int i; | |
144 | ||
145 | for (i = 0; i < N; i++) { | |
146 | if (i % mod == 0) { | |
147 | continue; | |
148 | } | |
149 | expected += i; | |
150 | } | |
151 | iter_sum_check(expected); | |
152 | } | |
153 | ||
1a95404f EC |
154 | static void qht_do_test(unsigned int mode, size_t init_entries) |
155 | { | |
7266ae91 EC |
156 | /* under KVM we might fetch stats from an uninitialized qht */ |
157 | check_n(0); | |
158 | ||
61b8cef1 | 159 | qht_init(&ht, is_equal, 0, mode); |
1a95404f | 160 | |
7266ae91 | 161 | check_n(0); |
1a95404f EC |
162 | insert(0, N); |
163 | check(0, N, true); | |
164 | check_n(N); | |
165 | check(-N, -1, false); | |
166 | iter_check(N); | |
167 | ||
168 | rm(101, 102); | |
169 | check_n(N - 1); | |
170 | insert(N, N * 2); | |
171 | check_n(N + N - 1); | |
172 | rm(N, N * 2); | |
173 | check_n(N - 1); | |
174 | insert(101, 102); | |
175 | check_n(N); | |
176 | ||
177 | rm(10, 200); | |
178 | check_n(N - 190); | |
179 | insert(150, 200); | |
180 | check_n(N - 190 + 50); | |
181 | insert(10, 150); | |
182 | check_n(N); | |
183 | ||
922034e7 EC |
184 | qht_reset(&ht); |
185 | insert(0, N); | |
186 | iter_rm_mod(10); | |
187 | iter_rm_mod_check(10); | |
188 | check_n(N * 9 / 10); | |
1a95404f EC |
189 | qht_reset_size(&ht, 0); |
190 | check_n(0); | |
191 | check(0, N, false); | |
192 | ||
193 | qht_destroy(&ht); | |
194 | } | |
195 | ||
196 | static void qht_test(unsigned int mode) | |
197 | { | |
198 | qht_do_test(mode, 0); | |
199 | qht_do_test(mode, 1); | |
200 | qht_do_test(mode, 2); | |
201 | qht_do_test(mode, 8); | |
202 | qht_do_test(mode, 16); | |
203 | qht_do_test(mode, 8192); | |
204 | qht_do_test(mode, 16384); | |
205 | } | |
206 | ||
207 | static void test_default(void) | |
208 | { | |
209 | qht_test(0); | |
210 | } | |
211 | ||
212 | static void test_resize(void) | |
213 | { | |
214 | qht_test(QHT_MODE_AUTO_RESIZE); | |
215 | } | |
216 | ||
217 | int main(int argc, char *argv[]) | |
218 | { | |
219 | g_test_init(&argc, &argv, NULL); | |
220 | g_test_add_func("/qht/mode/default", test_default); | |
221 | g_test_add_func("/qht/mode/resize", test_resize); | |
222 | return g_test_run(); | |
223 | } |