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mdbx: (re)alloc dpl-list at txn start.

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Change-Id: Ie35221666f09a189f5513e77d3ecb4056968334f
This commit is contained in:
Leonid Yuriev 2021-03-02 03:58:27 +03:00
parent 8cabd99d24
commit 46dcd6e7ca
1 changed files with 22 additions and 21 deletions
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43
src/core.c
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@ -3275,8 +3275,6 @@ static void mdbx_dpl_free(MDBX_txn *txn) {
}
static MDBX_dpl *mdbx_dpl_reserve(MDBX_txn *txn, size_t size) {
mdbx_tassert(txn,
txn->tw.dirtylist == NULL || txn->tw.dirtylist->length <= size);
size_t bytes = dpl2bytes((size < MDBX_PGL_LIMIT) ? size : MDBX_PGL_LIMIT);
MDBX_dpl *const dl = mdbx_realloc(txn->tw.dirtylist, bytes);
if (likely(dl)) {
@ -3291,15 +3289,18 @@ static MDBX_dpl *mdbx_dpl_reserve(MDBX_txn *txn, size_t size) {
}
static int mdbx_dpl_alloc(MDBX_txn *txn) {
mdbx_tassert(txn,
(txn->mt_flags & MDBX_TXN_RDONLY) == 0 && !txn->tw.dirtylist);
const size_t len = (txn->mt_env->me_options.dp_initial < txn->mt_geo.upper)
? txn->mt_env->me_options.dp_initial
: txn->mt_geo.upper;
MDBX_dpl *const dl = mdbx_dpl_reserve(txn, len);
if (unlikely(!dl))
return MDBX_ENOMEM;
mdbx_dpl_clear(dl);
mdbx_tassert(txn, (txn->mt_flags & MDBX_TXN_RDONLY) == 0);
const int wanna = (txn->mt_env->me_options.dp_initial < txn->mt_geo.upper)
? txn->mt_env->me_options.dp_initial
: txn->mt_geo.upper;
const int realloc_threshold = 64;
if (!txn->tw.dirtylist ||
(int)txn->tw.dirtylist->detent - wanna > realloc_threshold ||
(int)txn->tw.dirtylist->detent - wanna < -realloc_threshold) {
if (unlikely(!mdbx_dpl_reserve(txn, wanna)))
return MDBX_ENOMEM;
}
mdbx_dpl_clear(txn->tw.dirtylist);
return MDBX_SUCCESS;
}
@ -7040,8 +7041,6 @@ static int mdbx_txn_renew0(MDBX_txn *txn, const unsigned flags) {
#if MDBX_ENABLE_REFUND
txn->tw.loose_refund_wl = 0;
#endif /* MDBX_ENABLE_REFUND */
txn->tw.dirtyroom = txn->mt_env->me_options.dp_limit;
mdbx_dpl_clear(txn->tw.dirtylist);
MDBX_PNL_SIZE(txn->tw.retired_pages) = 0;
txn->tw.spill_pages = NULL;
txn->tw.spill_least_removed = 0;
@ -7055,6 +7054,11 @@ static int mdbx_txn_renew0(MDBX_txn *txn, const unsigned flags) {
memcpy(txn->mt_dbs, meta->mm_dbs, CORE_DBS * sizeof(MDBX_db));
/* Moved to here to avoid a data race in read TXNs */
txn->mt_geo = meta->mm_geo;
rc = mdbx_dpl_alloc(txn);
if (unlikely(rc != MDBX_SUCCESS))
goto bailout;
txn->tw.dirtyroom = txn->mt_env->me_options.dp_limit;
}
/* Setup db info */
@ -7285,6 +7289,7 @@ int mdbx_txn_begin_ex(MDBX_env *env, MDBX_txn *parent, MDBX_txn_flags_t flags,
mdbx_tassert(parent, mdbx_dirtylist_check(parent));
txn->tw.cursors = (MDBX_cursor **)(txn->mt_dbs + env->me_maxdbs);
txn->mt_dbiseqs = parent->mt_dbiseqs;
txn->mt_geo = parent->mt_geo;
rc = mdbx_dpl_alloc(txn);
if (likely(rc == MDBX_SUCCESS)) {
const unsigned len =
@ -7352,7 +7357,6 @@ int mdbx_txn_begin_ex(MDBX_env *env, MDBX_txn *parent, MDBX_txn_flags_t flags,
(void *)(intptr_t)MDBX_PNL_SIZE(parent->tw.retired_pages);
txn->mt_txnid = parent->mt_txnid;
txn->mt_geo = parent->mt_geo;
#if MDBX_ENABLE_REFUND
txn->tw.loose_refund_wl = 0;
#endif /* MDBX_ENABLE_REFUND */
@ -12025,13 +12029,10 @@ __cold int mdbx_env_open(MDBX_env *env, const char *pathname,
txn->mt_dbxs = env->me_dbxs;
txn->mt_flags = MDBX_TXN_FINISHED;
env->me_txn0 = txn;
rc = mdbx_dpl_alloc(txn);
if (likely(rc == MDBX_SUCCESS)) {
txn->tw.retired_pages = mdbx_pnl_alloc(MDBX_PNL_INITIAL);
txn->tw.reclaimed_pglist = mdbx_pnl_alloc(MDBX_PNL_INITIAL);
if (unlikely(!txn->tw.retired_pages || !txn->tw.reclaimed_pglist))
rc = MDBX_ENOMEM;
}
txn->tw.retired_pages = mdbx_pnl_alloc(MDBX_PNL_INITIAL);
txn->tw.reclaimed_pglist = mdbx_pnl_alloc(MDBX_PNL_INITIAL);
if (unlikely(!txn->tw.retired_pages || !txn->tw.reclaimed_pglist))
rc = MDBX_ENOMEM;
} else
rc = MDBX_ENOMEM;
}