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mdbx: перемещение полей внутри MDBX_txn и MDBX_env.

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В текущем понимании так префетчер ЦПУ может быть чуть более эффективным
и чуть меньше зазоров для выравнивания.
This commit is contained in:
Леонид Юрьев (Leonid Yuriev) 2023-11-03 11:28:13 +03:00
parent 54920cd07b
commit 81f386f831
1 changed files with 13 additions and 13 deletions
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26
src/internals.h
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@ -1170,6 +1170,8 @@ struct MDBX_txn {
#error "Oops, some txn flags overlapped or wrong"
#endif
uint32_t mt_flags;
unsigned mt_numdbs;
size_t mt_owner; /* thread ID that owns this transaction */
MDBX_txn *mt_parent; /* parent of a nested txn */
/* Nested txn under this txn, set together with flag MDBX_TXN_HAS_CHILD */
@ -1191,8 +1193,6 @@ struct MDBX_txn {
MDBX_dbx *mt_dbxs;
/* Array of MDBX_db records for each known DB */
MDBX_db *mt_dbs;
/* Array of sequence numbers for each DB handle */
MDBX_atomic_uint32_t *mt_dbiseqs;
/* Transaction DBI Flags */
#define DBI_DIRTY MDBX_DBI_DIRTY /* DB was written in this txn */
@ -1202,16 +1202,15 @@ struct MDBX_txn {
#define DBI_VALID 0x10 /* DB handle is valid, see also DB_VALID */
#define DBI_USRVALID 0x20 /* As DB_VALID, but not set for FREE_DBI */
#define DBI_AUDITED 0x40 /* Internal flag for accounting during audit */
/* Array of flags for each DB */
/* Array of non-shared txn's flags of DBI */
uint8_t *mt_dbistate;
/* Number of DB records in use, or 0 when the txn is finished.
* This number only ever increments until the txn finishes; we
* don't decrement it when individual DB handles are closed. */
MDBX_dbi mt_numdbs;
size_t mt_owner; /* thread ID that owns this transaction */
/* Array of sequence numbers for each DB handle. */
MDBX_atomic_uint32_t *mt_dbiseqs;
MDBX_cursor **mt_cursors;
MDBX_canary mt_canary;
void *mt_userctx; /* User-settable context */
MDBX_cursor **mt_cursors;
union {
struct {
@ -1364,6 +1363,7 @@ struct MDBX_env {
#define MDBX_DEPRECATED_COALESCE UINT32_C(0x2000000)
#define ENV_INTERNAL_FLAGS (MDBX_FATAL_ERROR | MDBX_ENV_ACTIVE | MDBX_ENV_TXKEY)
uint32_t me_flags;
unsigned me_psize; /* DB page size, initialized from me_os_psize */
osal_mmap_t me_dxb_mmap; /* The main data file */
#define me_map me_dxb_mmap.base
#define me_lazy_fd me_dxb_mmap.fd
@ -1376,7 +1376,6 @@ struct MDBX_env {
#define me_lfd me_lck_mmap.fd
struct MDBX_lockinfo *me_lck;
unsigned me_psize; /* DB page size, initialized from me_os_psize */
unsigned me_leaf_nodemax; /* max size of a leaf-node */
unsigned me_branch_nodemax; /* max size of a branch-node */
atomic_pgno_t me_mlocked_pgno;
@ -1448,6 +1447,7 @@ struct MDBX_env {
} me_sysv_ipc;
#endif /* MDBX_LOCKING == MDBX_LOCKING_SYSV */
bool me_incore;
bool me_prefault_write;
MDBX_env *me_lcklist_next;
@ -1455,11 +1455,11 @@ struct MDBX_env {
MDBX_txn *me_txn; /* current write transaction */
osal_fastmutex_t me_dbi_lock;
MDBX_dbi me_numdbs; /* number of DBs opened */
bool me_prefault_write;
unsigned me_numdbs; /* number of DBs opened */
MDBX_page *me_dp_reserve; /* list of malloc'ed blocks for re-use */
unsigned me_dp_reserve_len;
MDBX_page *me_dp_reserve; /* list of malloc'ed blocks for re-use */
/* PNL of pages that became unused in a write txn */
MDBX_PNL me_retired_pages;
osal_ioring_t me_ioring;