585 lines
18 KiB
C
585 lines
18 KiB
C
#include "test/jemalloc_test.h"
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#include "jemalloc/internal/ticker.h"
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static nstime_monotonic_t *nstime_monotonic_orig;
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static nstime_update_t *nstime_update_orig;
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static unsigned nupdates_mock;
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static nstime_t time_mock;
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static bool monotonic_mock;
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static bool
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nstime_monotonic_mock(void) {
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return monotonic_mock;
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}
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static void
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nstime_update_mock(nstime_t *time) {
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nupdates_mock++;
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if (monotonic_mock) {
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nstime_copy(time, &time_mock);
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}
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}
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static unsigned
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do_arena_create(ssize_t dirty_decay_ms, ssize_t muzzy_decay_ms) {
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unsigned arena_ind;
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size_t sz = sizeof(unsigned);
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expect_d_eq(mallctl("arenas.create", (void *)&arena_ind, &sz, NULL, 0),
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0, "Unexpected mallctl() failure");
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size_t mib[3];
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size_t miblen = sizeof(mib)/sizeof(size_t);
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expect_d_eq(mallctlnametomib("arena.0.dirty_decay_ms", mib, &miblen),
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0, "Unexpected mallctlnametomib() failure");
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mib[1] = (size_t)arena_ind;
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expect_d_eq(mallctlbymib(mib, miblen, NULL, NULL,
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(void *)&dirty_decay_ms, sizeof(dirty_decay_ms)), 0,
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"Unexpected mallctlbymib() failure");
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expect_d_eq(mallctlnametomib("arena.0.muzzy_decay_ms", mib, &miblen),
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0, "Unexpected mallctlnametomib() failure");
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mib[1] = (size_t)arena_ind;
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expect_d_eq(mallctlbymib(mib, miblen, NULL, NULL,
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(void *)&muzzy_decay_ms, sizeof(muzzy_decay_ms)), 0,
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"Unexpected mallctlbymib() failure");
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return arena_ind;
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}
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static void
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do_arena_destroy(unsigned arena_ind) {
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size_t mib[3];
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size_t miblen = sizeof(mib)/sizeof(size_t);
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expect_d_eq(mallctlnametomib("arena.0.destroy", mib, &miblen), 0,
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"Unexpected mallctlnametomib() failure");
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mib[1] = (size_t)arena_ind;
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expect_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
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"Unexpected mallctlbymib() failure");
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}
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void
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do_epoch(void) {
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uint64_t epoch = 1;
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expect_d_eq(mallctl("epoch", NULL, NULL, (void *)&epoch, sizeof(epoch)),
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0, "Unexpected mallctl() failure");
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}
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void
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do_purge(unsigned arena_ind) {
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size_t mib[3];
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size_t miblen = sizeof(mib)/sizeof(size_t);
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expect_d_eq(mallctlnametomib("arena.0.purge", mib, &miblen), 0,
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"Unexpected mallctlnametomib() failure");
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mib[1] = (size_t)arena_ind;
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expect_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
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"Unexpected mallctlbymib() failure");
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}
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void
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do_decay(unsigned arena_ind) {
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size_t mib[3];
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size_t miblen = sizeof(mib)/sizeof(size_t);
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expect_d_eq(mallctlnametomib("arena.0.decay", mib, &miblen), 0,
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"Unexpected mallctlnametomib() failure");
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mib[1] = (size_t)arena_ind;
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expect_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
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"Unexpected mallctlbymib() failure");
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}
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static uint64_t
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get_arena_npurge_impl(const char *mibname, unsigned arena_ind) {
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size_t mib[4];
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size_t miblen = sizeof(mib)/sizeof(size_t);
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expect_d_eq(mallctlnametomib(mibname, mib, &miblen), 0,
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"Unexpected mallctlnametomib() failure");
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mib[2] = (size_t)arena_ind;
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uint64_t npurge = 0;
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size_t sz = sizeof(npurge);
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expect_d_eq(mallctlbymib(mib, miblen, (void *)&npurge, &sz, NULL, 0),
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config_stats ? 0 : ENOENT, "Unexpected mallctlbymib() failure");
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return npurge;
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}
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static uint64_t
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get_arena_dirty_npurge(unsigned arena_ind) {
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do_epoch();
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return get_arena_npurge_impl("stats.arenas.0.dirty_npurge", arena_ind);
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}
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static uint64_t
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get_arena_dirty_purged(unsigned arena_ind) {
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do_epoch();
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return get_arena_npurge_impl("stats.arenas.0.dirty_purged", arena_ind);
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}
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static uint64_t
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get_arena_muzzy_npurge(unsigned arena_ind) {
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do_epoch();
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return get_arena_npurge_impl("stats.arenas.0.muzzy_npurge", arena_ind);
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}
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static uint64_t
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get_arena_npurge(unsigned arena_ind) {
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do_epoch();
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return get_arena_npurge_impl("stats.arenas.0.dirty_npurge", arena_ind) +
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get_arena_npurge_impl("stats.arenas.0.muzzy_npurge", arena_ind);
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}
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static size_t
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get_arena_pdirty(unsigned arena_ind) {
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do_epoch();
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size_t mib[4];
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size_t miblen = sizeof(mib)/sizeof(size_t);
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expect_d_eq(mallctlnametomib("stats.arenas.0.pdirty", mib, &miblen), 0,
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"Unexpected mallctlnametomib() failure");
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mib[2] = (size_t)arena_ind;
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size_t pdirty;
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size_t sz = sizeof(pdirty);
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expect_d_eq(mallctlbymib(mib, miblen, (void *)&pdirty, &sz, NULL, 0), 0,
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"Unexpected mallctlbymib() failure");
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return pdirty;
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}
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static size_t
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get_arena_pmuzzy(unsigned arena_ind) {
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do_epoch();
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size_t mib[4];
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size_t miblen = sizeof(mib)/sizeof(size_t);
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expect_d_eq(mallctlnametomib("stats.arenas.0.pmuzzy", mib, &miblen), 0,
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"Unexpected mallctlnametomib() failure");
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mib[2] = (size_t)arena_ind;
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size_t pmuzzy;
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size_t sz = sizeof(pmuzzy);
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expect_d_eq(mallctlbymib(mib, miblen, (void *)&pmuzzy, &sz, NULL, 0), 0,
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"Unexpected mallctlbymib() failure");
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return pmuzzy;
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}
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static void *
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do_mallocx(size_t size, int flags) {
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void *p = mallocx(size, flags);
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expect_ptr_not_null(p, "Unexpected mallocx() failure");
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return p;
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}
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static void
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generate_dirty(unsigned arena_ind, size_t size) {
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int flags = MALLOCX_ARENA(arena_ind) | MALLOCX_TCACHE_NONE;
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void *p = do_mallocx(size, flags);
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dallocx(p, flags);
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}
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TEST_BEGIN(test_decay_ticks) {
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test_skip_if(is_background_thread_enabled());
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test_skip_if(opt_hpa);
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ticker_geom_t *decay_ticker;
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unsigned tick0, tick1, arena_ind;
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size_t sz, large0;
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void *p;
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sz = sizeof(size_t);
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expect_d_eq(mallctl("arenas.lextent.0.size", (void *)&large0, &sz, NULL,
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0), 0, "Unexpected mallctl failure");
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/* Set up a manually managed arena for test. */
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arena_ind = do_arena_create(0, 0);
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/* Migrate to the new arena, and get the ticker. */
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unsigned old_arena_ind;
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size_t sz_arena_ind = sizeof(old_arena_ind);
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expect_d_eq(mallctl("thread.arena", (void *)&old_arena_ind,
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&sz_arena_ind, (void *)&arena_ind, sizeof(arena_ind)), 0,
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"Unexpected mallctl() failure");
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decay_ticker = tsd_arena_decay_tickerp_get(tsd_fetch());
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expect_ptr_not_null(decay_ticker,
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"Unexpected failure getting decay ticker");
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/*
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* Test the standard APIs using a large size class, since we can't
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* control tcache interactions for small size classes (except by
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* completely disabling tcache for the entire test program).
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*/
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/* malloc(). */
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tick0 = ticker_geom_read(decay_ticker);
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p = malloc(large0);
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expect_ptr_not_null(p, "Unexpected malloc() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0, "Expected ticker to tick during malloc()");
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/* free(). */
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tick0 = ticker_geom_read(decay_ticker);
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free(p);
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0, "Expected ticker to tick during free()");
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/* calloc(). */
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tick0 = ticker_geom_read(decay_ticker);
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p = calloc(1, large0);
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expect_ptr_not_null(p, "Unexpected calloc() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0, "Expected ticker to tick during calloc()");
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free(p);
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/* posix_memalign(). */
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tick0 = ticker_geom_read(decay_ticker);
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expect_d_eq(posix_memalign(&p, sizeof(size_t), large0), 0,
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"Unexpected posix_memalign() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during posix_memalign()");
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free(p);
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/* aligned_alloc(). */
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tick0 = ticker_geom_read(decay_ticker);
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p = aligned_alloc(sizeof(size_t), large0);
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expect_ptr_not_null(p, "Unexpected aligned_alloc() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during aligned_alloc()");
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free(p);
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/* realloc(). */
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/* Allocate. */
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tick0 = ticker_geom_read(decay_ticker);
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p = realloc(NULL, large0);
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expect_ptr_not_null(p, "Unexpected realloc() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0, "Expected ticker to tick during realloc()");
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/* Reallocate. */
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tick0 = ticker_geom_read(decay_ticker);
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p = realloc(p, large0);
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expect_ptr_not_null(p, "Unexpected realloc() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0, "Expected ticker to tick during realloc()");
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/* Deallocate. */
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tick0 = ticker_geom_read(decay_ticker);
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realloc(p, 0);
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0, "Expected ticker to tick during realloc()");
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/*
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* Test the *allocx() APIs using large and small size classes, with
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* tcache explicitly disabled.
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*/
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{
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unsigned i;
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size_t allocx_sizes[2];
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allocx_sizes[0] = large0;
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allocx_sizes[1] = 1;
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for (i = 0; i < sizeof(allocx_sizes) / sizeof(size_t); i++) {
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sz = allocx_sizes[i];
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/* mallocx(). */
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tick0 = ticker_geom_read(decay_ticker);
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p = mallocx(sz, MALLOCX_TCACHE_NONE);
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expect_ptr_not_null(p, "Unexpected mallocx() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during mallocx() (sz=%zu)",
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sz);
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/* rallocx(). */
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tick0 = ticker_geom_read(decay_ticker);
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p = rallocx(p, sz, MALLOCX_TCACHE_NONE);
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expect_ptr_not_null(p, "Unexpected rallocx() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during rallocx() (sz=%zu)",
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sz);
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/* xallocx(). */
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tick0 = ticker_geom_read(decay_ticker);
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xallocx(p, sz, 0, MALLOCX_TCACHE_NONE);
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during xallocx() (sz=%zu)",
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sz);
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/* dallocx(). */
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tick0 = ticker_geom_read(decay_ticker);
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dallocx(p, MALLOCX_TCACHE_NONE);
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during dallocx() (sz=%zu)",
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sz);
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/* sdallocx(). */
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p = mallocx(sz, MALLOCX_TCACHE_NONE);
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expect_ptr_not_null(p, "Unexpected mallocx() failure");
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tick0 = ticker_geom_read(decay_ticker);
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sdallocx(p, sz, MALLOCX_TCACHE_NONE);
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during sdallocx() "
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"(sz=%zu)", sz);
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}
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}
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/*
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* Test tcache fill/flush interactions for large and small size classes,
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* using an explicit tcache.
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*/
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unsigned tcache_ind, i;
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size_t tcache_sizes[2];
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tcache_sizes[0] = large0;
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tcache_sizes[1] = 1;
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size_t tcache_max, sz_tcache_max;
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sz_tcache_max = sizeof(tcache_max);
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expect_d_eq(mallctl("arenas.tcache_max", (void *)&tcache_max,
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&sz_tcache_max, NULL, 0), 0, "Unexpected mallctl() failure");
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sz = sizeof(unsigned);
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expect_d_eq(mallctl("tcache.create", (void *)&tcache_ind, &sz,
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NULL, 0), 0, "Unexpected mallctl failure");
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for (i = 0; i < sizeof(tcache_sizes) / sizeof(size_t); i++) {
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sz = tcache_sizes[i];
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/* tcache fill. */
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tick0 = ticker_geom_read(decay_ticker);
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p = mallocx(sz, MALLOCX_TCACHE(tcache_ind));
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expect_ptr_not_null(p, "Unexpected mallocx() failure");
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tick1 = ticker_geom_read(decay_ticker);
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during tcache fill "
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"(sz=%zu)", sz);
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/* tcache flush. */
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dallocx(p, MALLOCX_TCACHE(tcache_ind));
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tick0 = ticker_geom_read(decay_ticker);
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expect_d_eq(mallctl("tcache.flush", NULL, NULL,
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(void *)&tcache_ind, sizeof(unsigned)), 0,
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"Unexpected mallctl failure");
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tick1 = ticker_geom_read(decay_ticker);
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/* Will only tick if it's in tcache. */
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expect_u32_ne(tick1, tick0,
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"Expected ticker to tick during tcache flush (sz=%zu)", sz);
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}
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}
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TEST_END
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static void
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decay_ticker_helper(unsigned arena_ind, int flags, bool dirty, ssize_t dt,
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uint64_t dirty_npurge0, uint64_t muzzy_npurge0, bool terminate_asap) {
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#define NINTERVALS 101
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nstime_t time, update_interval, decay_ms, deadline;
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nstime_init_update(&time);
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nstime_init2(&decay_ms, dt, 0);
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nstime_copy(&deadline, &time);
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nstime_add(&deadline, &decay_ms);
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nstime_init2(&update_interval, dt, 0);
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nstime_idivide(&update_interval, NINTERVALS);
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/*
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* Keep q's slab from being deallocated during the looping below. If a
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* cached slab were to repeatedly come and go during looping, it could
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* prevent the decay backlog ever becoming empty.
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*/
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void *p = do_mallocx(1, flags);
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uint64_t dirty_npurge1, muzzy_npurge1;
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do {
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for (unsigned i = 0; i < ARENA_DECAY_NTICKS_PER_UPDATE / 2;
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i++) {
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void *q = do_mallocx(1, flags);
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dallocx(q, flags);
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}
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dirty_npurge1 = get_arena_dirty_npurge(arena_ind);
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muzzy_npurge1 = get_arena_muzzy_npurge(arena_ind);
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nstime_add(&time_mock, &update_interval);
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nstime_update(&time);
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} while (nstime_compare(&time, &deadline) <= 0 && ((dirty_npurge1 ==
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dirty_npurge0 && muzzy_npurge1 == muzzy_npurge0) ||
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!terminate_asap));
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dallocx(p, flags);
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if (config_stats) {
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expect_u64_gt(dirty_npurge1 + muzzy_npurge1, dirty_npurge0 +
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muzzy_npurge0, "Expected purging to occur");
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}
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#undef NINTERVALS
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}
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TEST_BEGIN(test_decay_ticker) {
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test_skip_if(is_background_thread_enabled());
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test_skip_if(opt_hpa);
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#define NPS 2048
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ssize_t ddt = opt_dirty_decay_ms;
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ssize_t mdt = opt_muzzy_decay_ms;
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unsigned arena_ind = do_arena_create(ddt, mdt);
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int flags = (MALLOCX_ARENA(arena_ind) | MALLOCX_TCACHE_NONE);
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void *ps[NPS];
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/*
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* Allocate a bunch of large objects, pause the clock, deallocate every
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* other object (to fragment virtual memory), restore the clock, then
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* [md]allocx() in a tight loop while advancing time rapidly to verify
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* the ticker triggers purging.
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*/
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size_t large;
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size_t sz = sizeof(size_t);
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expect_d_eq(mallctl("arenas.lextent.0.size", (void *)&large, &sz, NULL,
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0), 0, "Unexpected mallctl failure");
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do_purge(arena_ind);
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uint64_t dirty_npurge0 = get_arena_dirty_npurge(arena_ind);
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|
uint64_t muzzy_npurge0 = get_arena_muzzy_npurge(arena_ind);
|
|
|
|
for (unsigned i = 0; i < NPS; i++) {
|
|
ps[i] = do_mallocx(large, flags);
|
|
}
|
|
|
|
nupdates_mock = 0;
|
|
nstime_init_update(&time_mock);
|
|
monotonic_mock = true;
|
|
|
|
nstime_monotonic_orig = nstime_monotonic;
|
|
nstime_update_orig = nstime_update;
|
|
nstime_monotonic = nstime_monotonic_mock;
|
|
nstime_update = nstime_update_mock;
|
|
|
|
for (unsigned i = 0; i < NPS; i += 2) {
|
|
dallocx(ps[i], flags);
|
|
unsigned nupdates0 = nupdates_mock;
|
|
do_decay(arena_ind);
|
|
expect_u_gt(nupdates_mock, nupdates0,
|
|
"Expected nstime_update() to be called");
|
|
}
|
|
|
|
decay_ticker_helper(arena_ind, flags, true, ddt, dirty_npurge0,
|
|
muzzy_npurge0, true);
|
|
decay_ticker_helper(arena_ind, flags, false, ddt+mdt, dirty_npurge0,
|
|
muzzy_npurge0, false);
|
|
|
|
do_arena_destroy(arena_ind);
|
|
|
|
nstime_monotonic = nstime_monotonic_orig;
|
|
nstime_update = nstime_update_orig;
|
|
#undef NPS
|
|
}
|
|
TEST_END
|
|
|
|
TEST_BEGIN(test_decay_nonmonotonic) {
|
|
test_skip_if(is_background_thread_enabled());
|
|
test_skip_if(opt_hpa);
|
|
#define NPS (SMOOTHSTEP_NSTEPS + 1)
|
|
int flags = (MALLOCX_ARENA(0) | MALLOCX_TCACHE_NONE);
|
|
void *ps[NPS];
|
|
uint64_t npurge0 = 0;
|
|
uint64_t npurge1 = 0;
|
|
size_t sz, large0;
|
|
unsigned i, nupdates0;
|
|
|
|
sz = sizeof(size_t);
|
|
expect_d_eq(mallctl("arenas.lextent.0.size", (void *)&large0, &sz, NULL,
|
|
0), 0, "Unexpected mallctl failure");
|
|
|
|
expect_d_eq(mallctl("arena.0.purge", NULL, NULL, NULL, 0), 0,
|
|
"Unexpected mallctl failure");
|
|
do_epoch();
|
|
sz = sizeof(uint64_t);
|
|
npurge0 = get_arena_npurge(0);
|
|
|
|
nupdates_mock = 0;
|
|
nstime_init_update(&time_mock);
|
|
monotonic_mock = false;
|
|
|
|
nstime_monotonic_orig = nstime_monotonic;
|
|
nstime_update_orig = nstime_update;
|
|
nstime_monotonic = nstime_monotonic_mock;
|
|
nstime_update = nstime_update_mock;
|
|
|
|
for (i = 0; i < NPS; i++) {
|
|
ps[i] = mallocx(large0, flags);
|
|
expect_ptr_not_null(ps[i], "Unexpected mallocx() failure");
|
|
}
|
|
|
|
for (i = 0; i < NPS; i++) {
|
|
dallocx(ps[i], flags);
|
|
nupdates0 = nupdates_mock;
|
|
expect_d_eq(mallctl("arena.0.decay", NULL, NULL, NULL, 0), 0,
|
|
"Unexpected arena.0.decay failure");
|
|
expect_u_gt(nupdates_mock, nupdates0,
|
|
"Expected nstime_update() to be called");
|
|
}
|
|
|
|
do_epoch();
|
|
sz = sizeof(uint64_t);
|
|
npurge1 = get_arena_npurge(0);
|
|
|
|
if (config_stats) {
|
|
expect_u64_eq(npurge0, npurge1, "Unexpected purging occurred");
|
|
}
|
|
|
|
nstime_monotonic = nstime_monotonic_orig;
|
|
nstime_update = nstime_update_orig;
|
|
#undef NPS
|
|
}
|
|
TEST_END
|
|
|
|
TEST_BEGIN(test_decay_now) {
|
|
test_skip_if(is_background_thread_enabled());
|
|
test_skip_if(opt_hpa);
|
|
|
|
unsigned arena_ind = do_arena_create(0, 0);
|
|
expect_zu_eq(get_arena_pdirty(arena_ind), 0, "Unexpected dirty pages");
|
|
expect_zu_eq(get_arena_pmuzzy(arena_ind), 0, "Unexpected muzzy pages");
|
|
size_t sizes[] = {16, PAGE<<2, HUGEPAGE<<2};
|
|
/* Verify that dirty/muzzy pages never linger after deallocation. */
|
|
for (unsigned i = 0; i < sizeof(sizes)/sizeof(size_t); i++) {
|
|
size_t size = sizes[i];
|
|
generate_dirty(arena_ind, size);
|
|
expect_zu_eq(get_arena_pdirty(arena_ind), 0,
|
|
"Unexpected dirty pages");
|
|
expect_zu_eq(get_arena_pmuzzy(arena_ind), 0,
|
|
"Unexpected muzzy pages");
|
|
}
|
|
do_arena_destroy(arena_ind);
|
|
}
|
|
TEST_END
|
|
|
|
TEST_BEGIN(test_decay_never) {
|
|
test_skip_if(is_background_thread_enabled() || !config_stats);
|
|
test_skip_if(opt_hpa);
|
|
|
|
unsigned arena_ind = do_arena_create(-1, -1);
|
|
int flags = MALLOCX_ARENA(arena_ind) | MALLOCX_TCACHE_NONE;
|
|
expect_zu_eq(get_arena_pdirty(arena_ind), 0, "Unexpected dirty pages");
|
|
expect_zu_eq(get_arena_pmuzzy(arena_ind), 0, "Unexpected muzzy pages");
|
|
size_t sizes[] = {16, PAGE<<2, HUGEPAGE<<2};
|
|
void *ptrs[sizeof(sizes)/sizeof(size_t)];
|
|
for (unsigned i = 0; i < sizeof(sizes)/sizeof(size_t); i++) {
|
|
ptrs[i] = do_mallocx(sizes[i], flags);
|
|
}
|
|
/* Verify that each deallocation generates additional dirty pages. */
|
|
size_t pdirty_prev = get_arena_pdirty(arena_ind);
|
|
size_t pmuzzy_prev = get_arena_pmuzzy(arena_ind);
|
|
expect_zu_eq(pdirty_prev, 0, "Unexpected dirty pages");
|
|
expect_zu_eq(pmuzzy_prev, 0, "Unexpected muzzy pages");
|
|
for (unsigned i = 0; i < sizeof(sizes)/sizeof(size_t); i++) {
|
|
dallocx(ptrs[i], flags);
|
|
size_t pdirty = get_arena_pdirty(arena_ind);
|
|
size_t pmuzzy = get_arena_pmuzzy(arena_ind);
|
|
expect_zu_gt(pdirty + (size_t)get_arena_dirty_purged(arena_ind),
|
|
pdirty_prev, "Expected dirty pages to increase.");
|
|
expect_zu_eq(pmuzzy, 0, "Unexpected muzzy pages");
|
|
pdirty_prev = pdirty;
|
|
}
|
|
do_arena_destroy(arena_ind);
|
|
}
|
|
TEST_END
|
|
|
|
int
|
|
main(void) {
|
|
return test(
|
|
test_decay_ticks,
|
|
test_decay_ticker,
|
|
test_decay_nonmonotonic,
|
|
test_decay_now,
|
|
test_decay_never);
|
|
}
|