94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
#include "test/jemalloc_test.h"
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const char *malloc_conf = "background_thread:false,narenas:1,max_background_threads:8";
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static unsigned
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max_test_narenas(void) {
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/*
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* 10 here is somewhat arbitrary, except insofar as we want to ensure
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* that the number of background threads is smaller than the number of
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* arenas. I'll ragequit long before we have to spin up 10 threads per
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* cpu to handle background purging, so this is a conservative
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* approximation.
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*/
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unsigned ret = 10 * ncpus;
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/* Limit the max to avoid VM exhaustion on 32-bit . */
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return ret > 256 ? 256 : ret;
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}
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TEST_BEGIN(test_deferred) {
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test_skip_if(!have_background_thread);
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unsigned id;
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size_t sz_u = sizeof(unsigned);
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for (unsigned i = 0; i < max_test_narenas(); i++) {
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expect_d_eq(mallctl("arenas.create", &id, &sz_u, NULL, 0), 0,
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"Failed to create arena");
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}
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bool enable = true;
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size_t sz_b = sizeof(bool);
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expect_d_eq(mallctl("background_thread", NULL, NULL, &enable, sz_b), 0,
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"Failed to enable background threads");
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enable = false;
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expect_d_eq(mallctl("background_thread", NULL, NULL, &enable, sz_b), 0,
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"Failed to disable background threads");
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}
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TEST_END
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TEST_BEGIN(test_max_background_threads) {
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test_skip_if(!have_background_thread);
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size_t max_n_thds;
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size_t opt_max_n_thds;
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size_t sz_m = sizeof(max_n_thds);
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expect_d_eq(mallctl("opt.max_background_threads",
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&opt_max_n_thds, &sz_m, NULL, 0), 0,
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"Failed to get opt.max_background_threads");
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expect_d_eq(mallctl("max_background_threads", &max_n_thds, &sz_m, NULL,
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0), 0, "Failed to get max background threads");
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expect_zu_eq(opt_max_n_thds, max_n_thds,
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"max_background_threads and "
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"opt.max_background_threads should match");
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expect_d_eq(mallctl("max_background_threads", NULL, NULL, &max_n_thds,
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sz_m), 0, "Failed to set max background threads");
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unsigned id;
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size_t sz_u = sizeof(unsigned);
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for (unsigned i = 0; i < max_test_narenas(); i++) {
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expect_d_eq(mallctl("arenas.create", &id, &sz_u, NULL, 0), 0,
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"Failed to create arena");
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}
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bool enable = true;
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size_t sz_b = sizeof(bool);
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expect_d_eq(mallctl("background_thread", NULL, NULL, &enable, sz_b), 0,
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"Failed to enable background threads");
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expect_zu_eq(n_background_threads, max_n_thds,
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"Number of background threads should not change.\n");
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size_t new_max_thds = max_n_thds - 1;
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if (new_max_thds > 0) {
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expect_d_eq(mallctl("max_background_threads", NULL, NULL,
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&new_max_thds, sz_m), 0,
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"Failed to set max background threads");
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expect_zu_eq(n_background_threads, new_max_thds,
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"Number of background threads should decrease by 1.\n");
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}
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new_max_thds = 1;
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expect_d_eq(mallctl("max_background_threads", NULL, NULL, &new_max_thds,
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sz_m), 0, "Failed to set max background threads");
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expect_zu_eq(n_background_threads, new_max_thds,
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"Number of background threads should be 1.\n");
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}
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TEST_END
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int
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main(void) {
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return test_no_reentrancy(
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test_deferred,
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test_max_background_threads);
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}
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