1 #include "test/jemalloc_test.h"
2
3 const char *malloc_conf = "background_thread:false,narenas:1,max_background_threads:20";
4
TEST_BEGIN(test_deferred)5 TEST_BEGIN(test_deferred) {
6 test_skip_if(!have_background_thread);
7
8 unsigned id;
9 size_t sz_u = sizeof(unsigned);
10
11 /*
12 * 10 here is somewhat arbitrary, except insofar as we want to ensure
13 * that the number of background threads is smaller than the number of
14 * arenas. I'll ragequit long before we have to spin up 10 threads per
15 * cpu to handle background purging, so this is a conservative
16 * approximation.
17 */
18 for (unsigned i = 0; i < 10 * ncpus; i++) {
19 assert_d_eq(mallctl("arenas.create", &id, &sz_u, NULL, 0), 0,
20 "Failed to create arena");
21 }
22
23 bool enable = true;
24 size_t sz_b = sizeof(bool);
25 assert_d_eq(mallctl("background_thread", NULL, NULL, &enable, sz_b), 0,
26 "Failed to enable background threads");
27 enable = false;
28 assert_d_eq(mallctl("background_thread", NULL, NULL, &enable, sz_b), 0,
29 "Failed to disable background threads");
30 }
31 TEST_END
32
TEST_BEGIN(test_max_background_threads)33 TEST_BEGIN(test_max_background_threads) {
34 test_skip_if(!have_background_thread);
35
36 size_t maxt;
37 size_t opt_maxt;
38 size_t sz_m = sizeof(maxt);
39 assert_d_eq(mallctl("opt.max_background_threads",
40 &opt_maxt, &sz_m, NULL, 0), 0,
41 "Failed to get opt.max_background_threads");
42 assert_d_eq(mallctl("max_background_threads", &maxt, &sz_m, NULL, 0), 0,
43 "Failed to get max background threads");
44 assert_zu_eq(20, maxt, "should be ncpus");
45 assert_zu_eq(opt_maxt, maxt,
46 "max_background_threads and "
47 "opt.max_background_threads should match");
48 assert_d_eq(mallctl("max_background_threads", NULL, NULL, &maxt, sz_m),
49 0, "Failed to set max background threads");
50
51 unsigned id;
52 size_t sz_u = sizeof(unsigned);
53
54 for (unsigned i = 0; i < 10 * ncpus; i++) {
55 assert_d_eq(mallctl("arenas.create", &id, &sz_u, NULL, 0), 0,
56 "Failed to create arena");
57 }
58
59 bool enable = true;
60 size_t sz_b = sizeof(bool);
61 assert_d_eq(mallctl("background_thread", NULL, NULL, &enable, sz_b), 0,
62 "Failed to enable background threads");
63 assert_zu_eq(n_background_threads, maxt,
64 "Number of background threads should be 3.\n");
65 maxt = 10;
66 assert_d_eq(mallctl("max_background_threads", NULL, NULL, &maxt, sz_m),
67 0, "Failed to set max background threads");
68 assert_zu_eq(n_background_threads, maxt,
69 "Number of background threads should be 10.\n");
70 maxt = 3;
71 assert_d_eq(mallctl("max_background_threads", NULL, NULL, &maxt, sz_m),
72 0, "Failed to set max background threads");
73 assert_zu_eq(n_background_threads, maxt,
74 "Number of background threads should be 3.\n");
75 }
76 TEST_END
77
78 int
main(void)79 main(void) {
80 return test_no_reentrancy(
81 test_deferred,
82 test_max_background_threads);
83 }
84