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mdbx: add latency gathering for commit stages.

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Change-Id: If68ceb6e69e5e565ce9de0fd9a80424b6da280c5
This commit is contained in:
Leonid Yuriev
2020-10-15 19:23:14 +03:00
parent 7cf92b66cf
commit f73a8a8680
3 changed files with 81 additions and 10 deletions
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54
src/core.c
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@@ -8025,12 +8025,18 @@ static __always_inline bool mdbx_txn_dbi_exists(MDBX_txn *txn, MDBX_dbi dbi,
return mdbx_txn_import_dbi(txn, dbi);
}
int mdbx_txn_commit(MDBX_txn *txn) {
int mdbx_txn_commit(MDBX_txn *txn) { return __inline_mdbx_txn_commit(txn); }
int mdbx_txn_commit_ex(MDBX_txn *txn, MDBX_commit_latency *latency) {
STATIC_ASSERT(MDBX_TXN_FINISHED ==
MDBX_TXN_BLOCKED - MDBX_TXN_HAS_CHILD - MDBX_TXN_ERROR);
const uint64_t ts_0 = latency ? mdbx_osal_monotime() : 0;
uint64_t ts_1 = 0, ts_2 = 0, ts_3 = 0, ts_4 = 0;
uint32_t audit_duration = 0;
int rc = check_txn(txn, MDBX_TXN_FINISHED);
if (unlikely(rc != MDBX_SUCCESS))
return rc;
goto provide_latency;
if (unlikely(txn->mt_flags & MDBX_TXN_ERROR)) {
rc = MDBX_RESULT_TRUE;
@@ -8041,7 +8047,8 @@ int mdbx_txn_commit(MDBX_txn *txn) {
#if MDBX_ENV_CHECKPID
if (unlikely(env->me_pid != mdbx_getpid())) {
env->me_flags |= MDBX_FATAL_ERROR;
return MDBX_PANIC;
rc = MDBX_PANIC;
goto provide_latency;
}
#endif /* MDBX_ENV_CHECKPID */
@@ -8052,7 +8059,7 @@ int mdbx_txn_commit(MDBX_txn *txn) {
goto done;
if (txn->mt_child) {
rc = mdbx_txn_commit(txn->mt_child);
rc = mdbx_txn_commit_ex(txn->mt_child, NULL);
mdbx_tassert(txn, txn->mt_child == NULL);
if (unlikely(rc != MDBX_SUCCESS))
goto fail;
@@ -8107,6 +8114,7 @@ int mdbx_txn_commit(MDBX_txn *txn) {
parent->mt_dbistate[i] = txn->mt_dbistate[i] | (parent->mt_dbistate[i] &
(DBI_CREAT | DBI_FRESH));
}
ts_1 = latency ? mdbx_osal_monotime() : 0;
/* Remove refunded pages from parent's dirty & spill lists */
MDBX_DPL dst = mdbx_dpl_sort(parent->tw.dirtylist);
@@ -8278,6 +8286,7 @@ int mdbx_txn_commit(MDBX_txn *txn) {
parent->mt_flags |= MDBX_TXN_SPILLS;
}
ts_2 = latency ? mdbx_osal_monotime() : 0;
/* Append our loose page list to parent's */
if (txn->tw.loose_pages) {
MDBX_page **lp = &parent->tw.loose_pages;
@@ -8299,8 +8308,6 @@ int mdbx_txn_commit(MDBX_txn *txn) {
env->me_txn = parent;
parent->mt_child = NULL;
txn->mt_signature = 0;
mdbx_free(txn);
mdbx_tassert(parent, mdbx_dirtylist_check(parent));
/* Scan parent's loose page for suitable for refund */
@@ -8310,8 +8317,13 @@ int mdbx_txn_commit(MDBX_txn *txn) {
break;
}
}
ts_4 = ts_3 = latency ? mdbx_osal_monotime() : 0;
txn->mt_signature = 0;
mdbx_free(txn);
mdbx_tassert(parent, mdbx_dirtylist_check(parent));
return MDBX_SUCCESS;
rc = MDBX_SUCCESS;
goto provide_latency;
}
mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length ==
@@ -8360,17 +8372,23 @@ int mdbx_txn_commit(MDBX_txn *txn) {
}
}
ts_1 = latency ? mdbx_osal_monotime() : 0;
rc = mdbx_update_gc(txn);
if (unlikely(rc != MDBX_SUCCESS))
goto fail;
ts_2 = latency ? mdbx_osal_monotime() : 0;
if (mdbx_audit_enabled()) {
rc = mdbx_audit_ex(txn, MDBX_PNL_SIZE(txn->tw.retired_pages), true);
const uint64_t audit_end = mdbx_osal_monotime();
audit_duration = mdbx_osal_monotime_to_16dot16(audit_end - ts_2);
ts_2 = audit_end;
if (unlikely(rc != MDBX_SUCCESS))
goto fail;
}
rc = mdbx_page_flush(txn, 0);
ts_3 = latency ? mdbx_osal_monotime() : 0;
if (likely(rc == MDBX_SUCCESS)) {
if (txn->mt_dbs[MAIN_DBI].md_flags & DBI_DIRTY)
txn->mt_dbs[MAIN_DBI].md_mod_txnid = pp_txnid2chk(txn);
@@ -8392,6 +8410,7 @@ int mdbx_txn_commit(MDBX_txn *txn) {
rc = mdbx_sync_locked(
env, env->me_flags | txn->mt_flags | MDBX_SHRINK_ALLOWED, &meta);
}
ts_4 = latency ? mdbx_osal_monotime() : 0;
if (unlikely(rc != MDBX_SUCCESS)) {
env->me_flags |= MDBX_FATAL_ERROR;
goto fail;
@@ -8400,11 +8419,28 @@ int mdbx_txn_commit(MDBX_txn *txn) {
end_mode = MDBX_END_COMMITTED | MDBX_END_UPDATE | MDBX_END_EOTDONE;
done:
return mdbx_txn_end(txn, end_mode);
rc = mdbx_txn_end(txn, end_mode);
provide_latency:
if (latency) {
latency->audit = audit_duration;
latency->preparation =
ts_1 ? mdbx_osal_monotime_to_16dot16(ts_1 - ts_0) : 0;
latency->gc =
(ts_1 && ts_2) ? mdbx_osal_monotime_to_16dot16(ts_2 - ts_1) : 0;
latency->write =
(ts_2 && ts_3) ? mdbx_osal_monotime_to_16dot16(ts_3 - ts_2) : 0;
latency->sync =
(ts_3 && ts_4) ? mdbx_osal_monotime_to_16dot16(ts_4 - ts_3) : 0;
const uint64_t ts_5 = mdbx_osal_monotime();
latency->ending = ts_4 ? mdbx_osal_monotime_to_16dot16(ts_5 - ts_4) : 0;
latency->whole = mdbx_osal_monotime_to_16dot16(ts_5 - ts_0);
}
return rc;
fail:
mdbx_txn_abort(txn);
return rc;
goto provide_latency;
}
static __cold int