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https://github.com/isar/libmdbx.git
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mdbx: рефакторинг mdbx_txn_commit_ex() 3/5 (вычленение txn_nested_join()).
This commit is contained in:
Леонид Юрьев (Leonid Yuriev)
parent
c6cd482ea0
commit
b9b784c18e
146
src/api-txn.c
146
src/api-txn.c
@ -306,10 +306,6 @@ static void latency_gcprof(MDBX_commit_latency *latency, const MDBX_txn *txn) {
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}
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}
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struct commit_timestamp {
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uint64_t start, prep, gc, audit, write, sync, gc_cpu;
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};
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static void latency_init(MDBX_commit_latency *latency, struct commit_timestamp *ts) {
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ts->start = 0;
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ts->gc_cpu = 0;
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@ -349,9 +345,6 @@ int mdbx_txn_commit_ex(MDBX_txn *txn, MDBX_commit_latency *latency) {
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rc = MDBX_RESULT_TRUE;
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goto fail;
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}
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bailout:
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if (latency)
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memset(latency, 0, sizeof(*latency));
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return LOG_IFERR(rc);
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}
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@ -359,7 +352,7 @@ int mdbx_txn_commit_ex(MDBX_txn *txn, MDBX_commit_latency *latency) {
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if (MDBX_ENV_CHECKPID && unlikely(env->pid != osal_getpid())) {
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env->flags |= ENV_FATAL_ERROR;
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rc = MDBX_PANIC;
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goto bailout;
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return LOG_IFERR(rc);
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}
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if (unlikely(txn->flags & MDBX_TXN_RDONLY)) {
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@ -389,139 +382,26 @@ int mdbx_txn_commit_ex(MDBX_txn *txn, MDBX_commit_latency *latency) {
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}
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if (unlikely(txn != env->txn)) {
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DEBUG("%s", "attempt to commit unknown transaction");
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ERROR("attempt to commit %s txn %p", "unknown", (void *)txn);
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rc = MDBX_EINVAL;
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goto fail;
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return LOG_IFERR(rc);
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}
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if (txn->parent) {
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tASSERT(txn, audit_ex(txn, 0, false) == 0);
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eASSERT(env, txn != env->basal_txn);
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MDBX_txn *const parent = txn->parent;
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eASSERT(env, parent->signature == txn_signature);
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eASSERT(env, parent->nested == txn && (parent->flags & MDBX_TXN_HAS_CHILD) != 0);
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eASSERT(env, dpl_check(txn));
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if (txn->tw.dirtylist->length == 0 && !(txn->flags & MDBX_TXN_DIRTY) && parent->n_dbi == txn->n_dbi) {
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TXN_FOREACH_DBI_ALL(txn, i) {
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tASSERT(txn, (txn->dbi_state[i] & DBI_DIRTY) == 0);
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if ((txn->dbi_state[i] & DBI_STALE) && !(parent->dbi_state[i] & DBI_STALE))
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tASSERT(txn, memcmp(&parent->dbs[i], &txn->dbs[i], sizeof(tree_t)) == 0);
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}
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tASSERT(txn, memcmp(&parent->geo, &txn->geo, sizeof(parent->geo)) == 0);
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tASSERT(txn, memcmp(&parent->canary, &txn->canary, sizeof(parent->canary)) == 0);
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tASSERT(txn, !txn->tw.spilled.list || MDBX_PNL_GETSIZE(txn->tw.spilled.list) == 0);
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tASSERT(txn, txn->tw.loose_count == 0);
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if (unlikely(txn->parent->nested != txn || txn->parent->env != env)) {
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ERROR("attempt to commit %s txn %p", "strange nested", (void *)txn);
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rc = MDBX_PROBLEM;
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return LOG_IFERR(rc);
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}
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rc = txn_nested_join(txn, latency ? &ts : nullptr);
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if (likely(rc == MDBX_SUCCESS))
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goto provide_latency;
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if (rc == MDBX_RESULT_TRUE) {
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/* fast completion of pure nested transaction */
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VERBOSE("fast-complete pure nested txn %" PRIaTXN, txn->txnid);
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end_mode = TXN_END_PURE_COMMIT | TXN_END_SLOT | TXN_END_FREE;
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goto done;
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}
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/* Preserve space for spill list to avoid parent's state corruption
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* if allocation fails. */
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const size_t parent_retired_len = (uintptr_t)parent->tw.retired_pages;
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tASSERT(txn, parent_retired_len <= MDBX_PNL_GETSIZE(txn->tw.retired_pages));
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const size_t retired_delta = MDBX_PNL_GETSIZE(txn->tw.retired_pages) - parent_retired_len;
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if (retired_delta) {
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rc = pnl_need(&txn->tw.repnl, retired_delta);
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if (unlikely(rc != MDBX_SUCCESS))
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goto fail;
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}
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if (txn->tw.spilled.list) {
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if (parent->tw.spilled.list) {
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rc = pnl_need(&parent->tw.spilled.list, MDBX_PNL_GETSIZE(txn->tw.spilled.list));
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if (unlikely(rc != MDBX_SUCCESS))
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goto fail;
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}
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spill_purge(txn);
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}
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if (unlikely(txn->tw.dirtylist->length + parent->tw.dirtylist->length > parent->tw.dirtylist->detent &&
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!dpl_reserve(parent, txn->tw.dirtylist->length + parent->tw.dirtylist->length))) {
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rc = MDBX_ENOMEM;
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goto fail;
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}
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//-------------------------------------------------------------------------
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parent->tw.gc.retxl = txn->tw.gc.retxl;
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txn->tw.gc.retxl = nullptr;
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parent->tw.retired_pages = txn->tw.retired_pages;
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txn->tw.retired_pages = nullptr;
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pnl_free(parent->tw.repnl);
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parent->tw.repnl = txn->tw.repnl;
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txn->tw.repnl = nullptr;
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parent->tw.gc.time_acc = txn->tw.gc.time_acc;
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parent->tw.gc.last_reclaimed = txn->tw.gc.last_reclaimed;
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parent->geo = txn->geo;
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parent->canary = txn->canary;
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parent->flags |= txn->flags & MDBX_TXN_DIRTY;
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/* Move loose pages to parent */
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#if MDBX_ENABLE_REFUND
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parent->tw.loose_refund_wl = txn->tw.loose_refund_wl;
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#endif /* MDBX_ENABLE_REFUND */
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parent->tw.loose_count = txn->tw.loose_count;
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parent->tw.loose_pages = txn->tw.loose_pages;
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if (txn->flags & txn_may_have_cursors)
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/* Merge our cursors into parent's and close them */
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txn_done_cursors(txn);
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/* Update parent's DBs array */
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eASSERT(env, parent->n_dbi == txn->n_dbi);
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TXN_FOREACH_DBI_ALL(txn, dbi) {
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if (txn->dbi_state[dbi] & (DBI_CREAT | DBI_FRESH | DBI_DIRTY)) {
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parent->dbs[dbi] = txn->dbs[dbi];
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/* preserve parent's status */
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const uint8_t state = txn->dbi_state[dbi] | (parent->dbi_state[dbi] & (DBI_CREAT | DBI_FRESH | DBI_DIRTY));
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DEBUG("dbi %zu dbi-state %s 0x%02x -> 0x%02x", dbi, (parent->dbi_state[dbi] != state) ? "update" : "still",
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parent->dbi_state[dbi], state);
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parent->dbi_state[dbi] = state;
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} else {
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eASSERT(env, txn->dbi_state[dbi] == (parent->dbi_state[dbi] & ~(DBI_FRESH | DBI_CREAT | DBI_DIRTY)));
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}
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}
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if (latency) {
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ts.prep = osal_monotime();
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ts.gc = /* no gc-update */ ts.prep;
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ts.audit = /* no audit */ ts.gc;
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ts.write = /* no write */ ts.audit;
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ts.sync = /* no sync */ ts.write;
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}
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txn_merge(parent, txn, parent_retired_len);
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env->txn = parent;
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parent->nested = nullptr;
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tASSERT(parent, dpl_check(parent));
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#if MDBX_ENABLE_REFUND
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txn_refund(parent);
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if (ASSERT_ENABLED()) {
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/* Check parent's loose pages not suitable for refund */
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for (page_t *lp = parent->tw.loose_pages; lp; lp = page_next(lp)) {
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tASSERT(parent, lp->pgno < parent->tw.loose_refund_wl && lp->pgno + 1 < parent->geo.first_unallocated);
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MDBX_ASAN_UNPOISON_MEMORY_REGION(&page_next(lp), sizeof(page_t *));
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VALGRIND_MAKE_MEM_DEFINED(&page_next(lp), sizeof(page_t *));
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}
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/* Check parent's reclaimed pages not suitable for refund */
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if (MDBX_PNL_GETSIZE(parent->tw.repnl))
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tASSERT(parent, MDBX_PNL_MOST(parent->tw.repnl) + 1 < parent->geo.first_unallocated);
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}
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#endif /* MDBX_ENABLE_REFUND */
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txn->signature = 0;
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osal_free(txn);
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tASSERT(parent, audit_ex(parent, 0, false) == 0);
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rc = MDBX_SUCCESS;
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goto provide_latency;
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goto fail;
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}
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if (!txn->tw.dirtylist) {
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@ -68,13 +68,17 @@ enum {
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};
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MDBX_INTERNAL int txn_end(MDBX_txn *txn, unsigned mode);
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MDBX_INTERNAL int txn_write(MDBX_txn *txn, iov_ctx_t *ctx);
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MDBX_INTERNAL void txn_merge(MDBX_txn *const parent, MDBX_txn *const txn, const size_t parent_retired_len);
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MDBX_INTERNAL MDBX_txn *txn_alloc(const MDBX_txn_flags_t flags, MDBX_env *env);
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MDBX_INTERNAL MDBX_txn *txn_basal_create(const size_t max_dbi);
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MDBX_INTERNAL void txn_basal_destroy(MDBX_txn *txn);
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MDBX_INTERNAL int txn_nested_create(MDBX_txn *parent, const MDBX_txn_flags_t flags);
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MDBX_INTERNAL void txn_nested_abort(MDBX_txn *nested);
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struct commit_timestamp {
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uint64_t start, prep, gc, audit, write, sync, gc_cpu;
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};
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MDBX_INTERNAL int txn_nested_join(MDBX_txn *txn, struct commit_timestamp *ts);
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/* env.c */
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MDBX_INTERNAL int env_open(MDBX_env *env, mdbx_mode_t mode);
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MDBX_INTERNAL int env_info(const MDBX_env *env, const MDBX_txn *txn, MDBX_envinfo *out, size_t bytes, troika_t *troika);
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131
src/txn.c
131
src/txn.c
@ -96,8 +96,8 @@ int txn_write(MDBX_txn *txn, iov_ctx_t *ctx) {
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return rc;
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}
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/* Merge child txn into parent */
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void txn_merge(MDBX_txn *const parent, MDBX_txn *const txn, const size_t parent_retired_len) {
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/* Merge pageset of the nested txn into parent */
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static void txn_merge(MDBX_txn *const parent, MDBX_txn *const txn, const size_t parent_retired_len) {
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tASSERT(txn, (txn->flags & MDBX_WRITEMAP) == 0);
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dpl_t *const src = dpl_sort(txn);
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@ -1291,3 +1291,130 @@ void txn_nested_abort(MDBX_txn *nested) {
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pnl_free(nested->tw.repnl);
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osal_free(nested);
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}
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int txn_nested_join(MDBX_txn *txn, struct commit_timestamp *ts) {
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MDBX_env *const env = txn->env;
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MDBX_txn *const parent = txn->parent;
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tASSERT(txn, audit_ex(txn, 0, false) == 0);
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eASSERT(env, txn != env->basal_txn);
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eASSERT(env, parent->signature == txn_signature);
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eASSERT(env, parent->nested == txn && (parent->flags & MDBX_TXN_HAS_CHILD) != 0);
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eASSERT(env, dpl_check(txn));
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if (txn->tw.dirtylist->length == 0 && !(txn->flags & MDBX_TXN_DIRTY) && parent->n_dbi == txn->n_dbi) {
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TXN_FOREACH_DBI_ALL(txn, i) {
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tASSERT(txn, (txn->dbi_state[i] & DBI_DIRTY) == 0);
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if ((txn->dbi_state[i] & DBI_STALE) && !(parent->dbi_state[i] & DBI_STALE))
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tASSERT(txn, memcmp(&parent->dbs[i], &txn->dbs[i], sizeof(tree_t)) == 0);
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}
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tASSERT(txn, memcmp(&parent->geo, &txn->geo, sizeof(parent->geo)) == 0);
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tASSERT(txn, memcmp(&parent->canary, &txn->canary, sizeof(parent->canary)) == 0);
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tASSERT(txn, !txn->tw.spilled.list || MDBX_PNL_GETSIZE(txn->tw.spilled.list) == 0);
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tASSERT(txn, txn->tw.loose_count == 0);
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VERBOSE("fast-complete pure nested txn %" PRIaTXN, txn->txnid);
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return MDBX_RESULT_TRUE;
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}
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/* Preserve space for spill list to avoid parent's state corruption
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* if allocation fails. */
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const size_t parent_retired_len = (uintptr_t)parent->tw.retired_pages;
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tASSERT(txn, parent_retired_len <= MDBX_PNL_GETSIZE(txn->tw.retired_pages));
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const size_t retired_delta = MDBX_PNL_GETSIZE(txn->tw.retired_pages) - parent_retired_len;
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if (retired_delta) {
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int err = pnl_need(&txn->tw.repnl, retired_delta);
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if (unlikely(err != MDBX_SUCCESS))
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return err;
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}
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if (txn->tw.spilled.list) {
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if (parent->tw.spilled.list) {
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int err = pnl_need(&parent->tw.spilled.list, MDBX_PNL_GETSIZE(txn->tw.spilled.list));
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if (unlikely(err != MDBX_SUCCESS))
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return err;
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}
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spill_purge(txn);
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}
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if (unlikely(txn->tw.dirtylist->length + parent->tw.dirtylist->length > parent->tw.dirtylist->detent &&
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!dpl_reserve(parent, txn->tw.dirtylist->length + parent->tw.dirtylist->length))) {
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return MDBX_ENOMEM;
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}
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//-------------------------------------------------------------------------
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parent->tw.gc.retxl = txn->tw.gc.retxl;
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txn->tw.gc.retxl = nullptr;
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parent->tw.retired_pages = txn->tw.retired_pages;
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txn->tw.retired_pages = nullptr;
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pnl_free(parent->tw.repnl);
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parent->tw.repnl = txn->tw.repnl;
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txn->tw.repnl = nullptr;
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parent->tw.gc.time_acc = txn->tw.gc.time_acc;
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parent->tw.gc.last_reclaimed = txn->tw.gc.last_reclaimed;
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parent->geo = txn->geo;
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parent->canary = txn->canary;
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parent->flags |= txn->flags & MDBX_TXN_DIRTY;
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/* Move loose pages to parent */
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#if MDBX_ENABLE_REFUND
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parent->tw.loose_refund_wl = txn->tw.loose_refund_wl;
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#endif /* MDBX_ENABLE_REFUND */
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parent->tw.loose_count = txn->tw.loose_count;
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parent->tw.loose_pages = txn->tw.loose_pages;
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if (txn->flags & txn_may_have_cursors)
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/* Merge our cursors into parent's and close them */
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txn_done_cursors(txn);
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/* Update parent's DBs array */
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eASSERT(env, parent->n_dbi == txn->n_dbi);
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TXN_FOREACH_DBI_ALL(txn, dbi) {
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if (txn->dbi_state[dbi] & (DBI_CREAT | DBI_FRESH | DBI_DIRTY)) {
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parent->dbs[dbi] = txn->dbs[dbi];
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/* preserve parent's status */
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const uint8_t state = txn->dbi_state[dbi] | (parent->dbi_state[dbi] & (DBI_CREAT | DBI_FRESH | DBI_DIRTY));
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DEBUG("dbi %zu dbi-state %s 0x%02x -> 0x%02x", dbi, (parent->dbi_state[dbi] != state) ? "update" : "still",
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parent->dbi_state[dbi], state);
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parent->dbi_state[dbi] = state;
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} else {
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eASSERT(env, txn->dbi_state[dbi] == (parent->dbi_state[dbi] & ~(DBI_FRESH | DBI_CREAT | DBI_DIRTY)));
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}
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}
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if (ts) {
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ts->prep = osal_monotime();
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ts->gc = /* no gc-update */ ts->prep;
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ts->audit = /* no audit */ ts->gc;
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ts->write = /* no write */ ts->audit;
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ts->sync = /* no sync */ ts->write;
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}
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txn_merge(parent, txn, parent_retired_len);
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env->txn = parent;
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parent->nested = nullptr;
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tASSERT(parent, dpl_check(parent));
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#if MDBX_ENABLE_REFUND
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txn_refund(parent);
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if (ASSERT_ENABLED()) {
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/* Check parent's loose pages not suitable for refund */
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for (page_t *lp = parent->tw.loose_pages; lp; lp = page_next(lp)) {
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tASSERT(parent, lp->pgno < parent->tw.loose_refund_wl && lp->pgno + 1 < parent->geo.first_unallocated);
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MDBX_ASAN_UNPOISON_MEMORY_REGION(&page_next(lp), sizeof(page_t *));
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VALGRIND_MAKE_MEM_DEFINED(&page_next(lp), sizeof(page_t *));
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}
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/* Check parent's reclaimed pages not suitable for refund */
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if (MDBX_PNL_GETSIZE(parent->tw.repnl))
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tASSERT(parent, MDBX_PNL_MOST(parent->tw.repnl) + 1 < parent->geo.first_unallocated);
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}
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#endif /* MDBX_ENABLE_REFUND */
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txn->signature = 0;
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osal_free(txn);
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tASSERT(parent, audit_ex(parent, 0, false) == 0);
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return MDBX_SUCCESS;
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}
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