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mdbx: add MDBX_xPL_PREALLOC_FOR_RADIXSORT build options.

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Change-Id: Icf15558830f86f98c5e970a7eec69cc045045467
This commit is contained in:
Leonid Yuriev 2021-04-21 00:13:51 +03:00
parent 3b5e2680e9
commit eabb29d9c4
4 changed files with 78 additions and 18 deletions
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1
.github/actions/spelling/expect.txt vendored
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@ -1258,6 +1258,7 @@ powerpc
ppc
pragma
pread
prealloc
prealloc'd
PREDEF
prefetch

77
src/core.c
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@ -2619,13 +2619,19 @@ static int lcklist_detach_locked(MDBX_env *env) {
/*------------------------------------------------------------------------------
* LY: radix sort for large chunks */
#define RADIXSORT_IMPL(NAME, TYPE, EXTRACT_KEY) \
#define RADIXSORT_IMPL(NAME, TYPE, EXTRACT_KEY, BUFFER_PREALLOCATED, END_GAP) \
\
__hot static bool NAME##_radixsort(TYPE *const begin, \
const unsigned length) { \
TYPE *tmp = mdbx_malloc(sizeof(TYPE) * length); \
if (unlikely(!tmp)) \
return false; \
TYPE *tmp; \
if (BUFFER_PREALLOCATED) { \
tmp = begin + length + END_GAP; \
/* memset(tmp, 0xDeadBeef, sizeof(TYPE) * length); */ \
} else { \
tmp = mdbx_malloc(sizeof(TYPE) * length); \
if (unlikely(!tmp)) \
return false; \
} \
\
unsigned key_shift = 0, key_diff_mask; \
do { \
@ -2674,7 +2680,8 @@ static int lcklist_detach_locked(MDBX_env *env) {
key_shift += 16; \
} while (key_diff_mask >> 16); \
\
mdbx_free(tmp); \
if (!(BUFFER_PREALLOCATED)) \
mdbx_free(tmp); \
return true; \
}
@ -2731,8 +2738,16 @@ static int lcklist_detach_locked(MDBX_env *env) {
/*----------------------------------------------------------------------------*/
static __always_inline size_t pnl2bytes(const size_t size) {
static __always_inline size_t pnl2bytes(size_t size) {
assert(size > 0 && size <= MDBX_PGL_LIMIT);
#if MDBX_PNL_PREALLOC_FOR_RADIXSORT
size += size;
#endif /* MDBX_PNL_PREALLOC_FOR_RADIXSORT */
STATIC_ASSERT(MDBX_ASSUME_MALLOC_OVERHEAD +
(MDBX_PGL_LIMIT * (MDBX_PNL_PREALLOC_FOR_RADIXSORT + 1) +
MDBX_PNL_GRANULATE + 2) *
sizeof(pgno_t) <
SIZE_MAX / 4 * 3);
size_t bytes =
ceil_powerof2(MDBX_ASSUME_MALLOC_OVERHEAD + sizeof(pgno_t) * (size + 2),
MDBX_PNL_GRANULATE * sizeof(pgno_t)) -
@ -2743,7 +2758,11 @@ static __always_inline size_t pnl2bytes(const size_t size) {
static __always_inline pgno_t bytes2pnl(const size_t bytes) {
size_t size = bytes / sizeof(pgno_t);
assert(size > 2 && size <= MDBX_PGL_LIMIT);
return (pgno_t)size - 2;
size -= 2;
#if MDBX_PNL_PREALLOC_FOR_RADIXSORT
size >>= 1;
#endif /* MDBX_PNL_PREALLOC_FOR_RADIXSORT */
return (pgno_t)size;
}
static MDBX_PNL mdbx_pnl_alloc(size_t size) {
@ -2768,7 +2787,8 @@ static void mdbx_pnl_free(MDBX_PNL pl) {
/* Shrink the PNL to the default size if it has grown larger */
static void mdbx_pnl_shrink(MDBX_PNL *ppl) {
assert(bytes2pnl(pnl2bytes(MDBX_PNL_INITIAL)) == MDBX_PNL_INITIAL);
assert(bytes2pnl(pnl2bytes(MDBX_PNL_INITIAL)) >= MDBX_PNL_INITIAL &&
bytes2pnl(pnl2bytes(MDBX_PNL_INITIAL)) < MDBX_PNL_INITIAL * 3 / 2);
assert(MDBX_PNL_SIZE(*ppl) <= MDBX_PGL_LIMIT &&
MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl));
MDBX_PNL_SIZE(*ppl) = 0;
@ -2992,7 +3012,8 @@ static MDBX_PNL mdbx_spill_purge(MDBX_txn *txn) {
#else
#define MDBX_PNL_EXTRACT_KEY(ptr) (P_INVALID - *(ptr))
#endif
RADIXSORT_IMPL(pgno, pgno_t, MDBX_PNL_EXTRACT_KEY)
RADIXSORT_IMPL(pgno, pgno_t, MDBX_PNL_EXTRACT_KEY,
MDBX_PNL_PREALLOC_FOR_RADIXSORT, 0)
SORT_IMPL(pgno_sort, false, pgno_t, MDBX_PNL_ORDERED)
static __hot void mdbx_pnl_sort(MDBX_PNL pnl) {
@ -3159,11 +3180,20 @@ static int __must_check_result mdbx_txl_append(MDBX_TXL *ptl, txnid_t id) {
#define MDBX_DPL_RESERVE_GAP \
(MDBX_DPL_GAP_FOR_MERGESORT + MDBX_DPL_GAP_FOR_EDGING)
static __always_inline size_t dpl2bytes(const ptrdiff_t size) {
static __always_inline size_t dpl2bytes(ptrdiff_t size) {
assert(size > CURSOR_STACK && (size_t)size <= MDBX_PGL_LIMIT);
#if MDBX_DPL_PREALLOC_FOR_RADIXSORT
size += size;
#endif /* MDBX_DPL_PREALLOC_FOR_RADIXSORT */
STATIC_ASSERT(MDBX_ASSUME_MALLOC_OVERHEAD + sizeof(MDBX_dpl) +
(MDBX_PGL_LIMIT * (MDBX_DPL_PREALLOC_FOR_RADIXSORT + 1) +
MDBX_DPL_RESERVE_GAP) *
sizeof(MDBX_dp) +
MDBX_PNL_GRANULATE * sizeof(void *) * 2 <
SIZE_MAX / 4 * 3);
size_t bytes =
ceil_powerof2(MDBX_ASSUME_MALLOC_OVERHEAD + sizeof(MDBX_dpl) +
(size + MDBX_DPL_RESERVE_GAP) * sizeof(MDBX_dp),
((size_t)size + MDBX_DPL_RESERVE_GAP) * sizeof(MDBX_dp),
MDBX_PNL_GRANULATE * sizeof(void *) * 2) -
MDBX_ASSUME_MALLOC_OVERHEAD;
return bytes;
@ -3173,7 +3203,11 @@ static __always_inline unsigned bytes2dpl(const ptrdiff_t bytes) {
size_t size = (bytes - sizeof(MDBX_dpl)) / sizeof(MDBX_dp);
assert(size > CURSOR_STACK + MDBX_DPL_RESERVE_GAP &&
size <= MDBX_PGL_LIMIT + MDBX_PNL_GRANULATE);
return (unsigned)size - MDBX_DPL_RESERVE_GAP;
size -= MDBX_DPL_RESERVE_GAP;
#if MDBX_DPL_PREALLOC_FOR_RADIXSORT
size >>= 1;
#endif /* MDBX_DPL_PREALLOC_FOR_RADIXSORT */
return (unsigned)size;
}
static __always_inline unsigned mdbx_dpl_setlen(MDBX_dpl *dl, unsigned len) {
@ -3237,20 +3271,26 @@ static int mdbx_dpl_alloc(MDBX_txn *txn) {
}
#define MDBX_DPL_EXTRACT_KEY(ptr) ((ptr)->pgno)
RADIXSORT_IMPL(dpl, MDBX_dp, MDBX_DPL_EXTRACT_KEY)
RADIXSORT_IMPL(dpl, MDBX_dp, MDBX_DPL_EXTRACT_KEY,
MDBX_DPL_PREALLOC_FOR_RADIXSORT, 1)
#define DP_SORT_CMP(first, last) ((first).pgno < (last).pgno)
SORT_IMPL(dp_sort, false, MDBX_dp, DP_SORT_CMP)
__hot static MDBX_dpl *mdbx_dpl_sort_slowpath(MDBX_dpl *dl) {
assert(dl->items[0].pgno == 0 && dl->items[dl->length + 1].pgno == P_INVALID);
const unsigned unsorted = dl->length - dl->sorted;
if (likely(unsorted < MDBX_PNL_RADIXSORT_THRESHOLD) ||
!dpl_radixsort(dl->items + 1, dl->length)) {
if (dl->sorted > unsorted / 4 + 4 &&
dl->length + unsorted < dl->detent + MDBX_DPL_GAP_FOR_MERGESORT) {
(MDBX_DPL_PREALLOC_FOR_RADIXSORT ||
dl->length + unsorted < dl->detent + MDBX_DPL_GAP_FOR_MERGESORT)) {
MDBX_dp *const sorted_begin = dl->items + 1;
MDBX_dp *const sorted_end = sorted_begin + dl->sorted;
MDBX_dp *const end = dl->items + dl->detent + MDBX_DPL_RESERVE_GAP;
MDBX_dp *const end =
dl->items + (MDBX_DPL_PREALLOC_FOR_RADIXSORT
? dl->length + dl->length + 1
: dl->detent + MDBX_DPL_RESERVE_GAP);
MDBX_dp *const tmp = end - unsorted;
assert(dl->items + dl->length + 1 < tmp);
/* copy unsorted to the end of allocated space and sort it */
@ -3264,7 +3304,7 @@ __hot static MDBX_dpl *mdbx_dpl_sort_slowpath(MDBX_dpl *dl) {
const bool cmp = l->pgno > r->pgno;
*w = cmp ? *l : *r;
l -= cmp;
r -= !cmp;
r += cmp - 1;
} while (likely(--w > l));
assert(r == tmp - 1);
assert(dl->items[0].pgno == 0 &&
@ -3277,6 +3317,9 @@ __hot static MDBX_dpl *mdbx_dpl_sort_slowpath(MDBX_dpl *dl) {
assert(dl->items[0].pgno == 0 &&
dl->items[dl->length + 1].pgno == P_INVALID);
}
} else {
assert(dl->items[0].pgno == 0 &&
dl->items[dl->length + 1].pgno == P_INVALID);
}
dl->sorted = dl->length;
return dl;
@ -3429,7 +3472,7 @@ mdbx_dpl_append(MDBX_txn *txn, pgno_t pgno, MDBX_page *page) {
if (unlikely(dl->length == dl->detent)) {
if (unlikely(dl->detent >= MDBX_PGL_LIMIT)) {
mdbx_error("DPL is full (MDBX_PGL_LIMIT %u)", MDBX_PGL_LIMIT);
mdbx_error("DPL is full (MDBX_PGL_LIMIT %zu)", MDBX_PGL_LIMIT);
return MDBX_TXN_FULL;
}
const size_t size = (dl->detent < MDBX_PNL_INITIAL * 42)

2
src/internals.h
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@ -793,7 +793,7 @@ typedef struct MDBX_lockinfo {
#define MAX_MAPSIZE MAX_MAPSIZE64
#define MDBX_READERS_LIMIT \
((MAX_PAGESIZE - sizeof(MDBX_lockinfo)) / sizeof(MDBX_reader))
#define MDBX_PGL_LIMIT MAX_PAGENO
#define MDBX_PGL_LIMIT ((size_t)MAX_PAGENO)
#else
#define MDBX_READERS_LIMIT 1024
#define MAX_MAPSIZE MAX_MAPSIZE32

16
src/options.h
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@ -115,6 +115,22 @@
#error MDBX_DISABLE_PAGECHECKS must be defined as 0 or 1
#endif /* MDBX_DISABLE_PAGECHECKS */
#ifndef MDBX_PNL_PREALLOC_FOR_RADIXSORT
#define MDBX_PNL_PREALLOC_FOR_RADIXSORT 1
#endif
#if !(MDBX_PNL_PREALLOC_FOR_RADIXSORT == 0 || \
MDBX_PNL_PREALLOC_FOR_RADIXSORT == 1)
#error MDBX_PNL_PREALLOC_FOR_RADIXSORT must be defined as 0 or 1
#endif /* MDBX_PNL_PREALLOC_FOR_RADIXSORT */
#ifndef MDBX_DPL_PREALLOC_FOR_RADIXSORT
#define MDBX_DPL_PREALLOC_FOR_RADIXSORT 1
#endif
#if !(MDBX_DPL_PREALLOC_FOR_RADIXSORT == 0 || \
MDBX_DPL_PREALLOC_FOR_RADIXSORT == 1)
#error MDBX_DPL_PREALLOC_FOR_RADIXSORT must be defined as 0 or 1
#endif /* MDBX_DPL_PREALLOC_FOR_RADIXSORT */
/** Controls sort order of internal page number lists.
* The database format depend on this option and libmdbx builded with different
* option value are incompatible. */