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background_thread.c revision 1.1.1.2 
      1 #include "test/jemalloc_test.h"
      2 
      3 #include "jemalloc/internal/util.h"
      4 
      5 static void
      6 test_switch_background_thread_ctl(bool new_val) {
      7 	bool e0, e1;
      8 	size_t sz = sizeof(bool);
      9 
     10 	e1 = new_val;
     11 	expect_d_eq(mallctl("background_thread", (void *)&e0, &sz,
     12 	    &e1, sz), 0, "Unexpected mallctl() failure");
     13 	expect_b_eq(e0, !e1,
     14 	    "background_thread should be %d before.\n", !e1);
     15 	if (e1) {
     16 		expect_zu_gt(n_background_threads, 0,
     17 		    "Number of background threads should be non zero.\n");
     18 	} else {
     19 		expect_zu_eq(n_background_threads, 0,
     20 		    "Number of background threads should be zero.\n");
     21 	}
     22 }
     23 
     24 static void
     25 test_repeat_background_thread_ctl(bool before) {
     26 	bool e0, e1;
     27 	size_t sz = sizeof(bool);
     28 
     29 	e1 = before;
     30 	expect_d_eq(mallctl("background_thread", (void *)&e0, &sz,
     31 	    &e1, sz), 0, "Unexpected mallctl() failure");
     32 	expect_b_eq(e0, before,
     33 	    "background_thread should be %d.\n", before);
     34 	if (e1) {
     35 		expect_zu_gt(n_background_threads, 0,
     36 		    "Number of background threads should be non zero.\n");
     37 	} else {
     38 		expect_zu_eq(n_background_threads, 0,
     39 		    "Number of background threads should be zero.\n");
     40 	}
     41 }
     42 
     43 TEST_BEGIN(test_background_thread_ctl) {
     44 	test_skip_if(!have_background_thread);
     45 
     46 	bool e0, e1;
     47 	size_t sz = sizeof(bool);
     48 
     49 	expect_d_eq(mallctl("opt.background_thread", (void *)&e0, &sz,
     50 	    NULL, 0), 0, "Unexpected mallctl() failure");
     51 	expect_d_eq(mallctl("background_thread", (void *)&e1, &sz,
     52 	    NULL, 0), 0, "Unexpected mallctl() failure");
     53 	expect_b_eq(e0, e1,
     54 	    "Default and opt.background_thread does not match.\n");
     55 	if (e0) {
     56 		test_switch_background_thread_ctl(false);
     57 	}
     58 	expect_zu_eq(n_background_threads, 0,
     59 	    "Number of background threads should be 0.\n");
     60 
     61 	for (unsigned i = 0; i < 4; i++) {
     62 		test_switch_background_thread_ctl(true);
     63 		test_repeat_background_thread_ctl(true);
     64 		test_repeat_background_thread_ctl(true);
     65 
     66 		test_switch_background_thread_ctl(false);
     67 		test_repeat_background_thread_ctl(false);
     68 		test_repeat_background_thread_ctl(false);
     69 	}
     70 }
     71 TEST_END
     72 
     73 TEST_BEGIN(test_background_thread_running) {
     74 	test_skip_if(!have_background_thread);
     75 	test_skip_if(!config_stats);
     76 
     77 #if defined(JEMALLOC_BACKGROUND_THREAD)
     78 	tsd_t *tsd = tsd_fetch();
     79 	background_thread_info_t *info = &background_thread_info[0];
     80 
     81 	test_repeat_background_thread_ctl(false);
     82 	test_switch_background_thread_ctl(true);
     83 	expect_b_eq(info->state, background_thread_started,
     84 	    "Background_thread did not start.\n");
     85 
     86 	nstime_t start;
     87 	nstime_init_update(&start);
     88 
     89 	bool ran = false;
     90 	while (true) {
     91 		malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx);
     92 		if (info->tot_n_runs > 0) {
     93 			ran = true;
     94 		}
     95 		malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx);
     96 		if (ran) {
     97 			break;
     98 		}
     99 
    100 		nstime_t now;
    101 		nstime_init_update(&now);
    102 		nstime_subtract(&now, &start);
    103 		expect_u64_lt(nstime_sec(&now), 1000,
    104 		    "Background threads did not run for 1000 seconds.");
    105 		sleep(1);
    106 	}
    107 	test_switch_background_thread_ctl(false);
    108 #endif
    109 }
    110 TEST_END
    111 
    112 int
    113 main(void) {
    114 	/* Background_thread creation tests reentrancy naturally. */
    115 	return test_no_reentrancy(
    116 	    test_background_thread_ctl,
    117 	    test_background_thread_running);
    118 }
    119