mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
lib/uint64set: reduce memory usage when storing big number of sparse metric_id values
This commit is contained in:
Aliaksandr Valialkin
parent
b5645ccbdf
commit
695682232f
1 changed files with 127 additions and 173 deletions
|
|
@ -13,13 +13,11 @@ import (
|
|||
//
|
||||
// It is unsafe calling Set methods from concurrent goroutines.
|
||||
type Set struct {
|
||||
skipSmallPool bool
|
||||
itemsCount int
|
||||
buckets bucket32Sorter
|
||||
smallPool [5]uint64
|
||||
itemsCount int
|
||||
buckets bucket32Sorter
|
||||
}
|
||||
|
||||
type bucket32Sorter []*bucket32
|
||||
type bucket32Sorter []bucket32
|
||||
|
||||
func (s *bucket32Sorter) Len() int { return len(*s) }
|
||||
func (s *bucket32Sorter) Less(i, j int) bool {
|
||||
|
|
@ -38,12 +36,12 @@ func (s *Set) Clone() *Set {
|
|||
return &Set{}
|
||||
}
|
||||
var dst Set
|
||||
dst.skipSmallPool = s.skipSmallPool
|
||||
dst.itemsCount = s.itemsCount
|
||||
dst.buckets = make([]*bucket32, len(s.buckets))
|
||||
dst.smallPool = s.smallPool
|
||||
for i, b32 := range s.buckets {
|
||||
dst.buckets[i] = b32.clone()
|
||||
if len(s.buckets) > 0 {
|
||||
dst.buckets = make([]bucket32, len(s.buckets))
|
||||
for i := range s.buckets {
|
||||
s.buckets[i].copyTo(&dst.buckets[i])
|
||||
}
|
||||
}
|
||||
return &dst
|
||||
}
|
||||
|
|
@ -54,9 +52,10 @@ func (s *Set) SizeBytes() uint64 {
|
|||
return 0
|
||||
}
|
||||
n := uint64(unsafe.Sizeof(*s))
|
||||
for _, b := range s.buckets {
|
||||
n += uint64(unsafe.Sizeof(b))
|
||||
n += b.sizeBytes()
|
||||
for i := range s.buckets {
|
||||
b32 := &s.buckets[i]
|
||||
n += uint64(unsafe.Sizeof(b32))
|
||||
n += b32.sizeBytes()
|
||||
}
|
||||
return n
|
||||
}
|
||||
|
|
@ -71,13 +70,10 @@ func (s *Set) Len() int {
|
|||
|
||||
// Add adds x to s.
|
||||
func (s *Set) Add(x uint64) {
|
||||
if !s.skipSmallPool {
|
||||
s.addToSmallPool(x)
|
||||
return
|
||||
}
|
||||
hi := uint32(x >> 32)
|
||||
lo := uint32(x)
|
||||
for _, b32 := range s.buckets {
|
||||
for i := range s.buckets {
|
||||
b32 := &s.buckets[i]
|
||||
if b32.hi == hi {
|
||||
if b32.add(lo) {
|
||||
s.itemsCount++
|
||||
|
|
@ -88,29 +84,16 @@ func (s *Set) Add(x uint64) {
|
|||
s.addAlloc(hi, lo)
|
||||
}
|
||||
|
||||
func (s *Set) addToSmallPool(x uint64) {
|
||||
if s.hasInSmallPool(x) {
|
||||
return
|
||||
}
|
||||
if s.itemsCount < len(s.smallPool) {
|
||||
s.smallPool[s.itemsCount] = x
|
||||
s.itemsCount++
|
||||
return
|
||||
}
|
||||
s.skipSmallPool = true
|
||||
s.itemsCount = 0
|
||||
for _, v := range s.smallPool[:] {
|
||||
s.Add(v)
|
||||
}
|
||||
s.Add(x)
|
||||
}
|
||||
|
||||
func (s *Set) addAlloc(hi, lo uint32) {
|
||||
var b32 bucket32
|
||||
b32 := s.addBucket32()
|
||||
b32.hi = hi
|
||||
_ = b32.add(lo)
|
||||
s.itemsCount++
|
||||
s.buckets = append(s.buckets, &b32)
|
||||
}
|
||||
|
||||
func (s *Set) addBucket32() *bucket32 {
|
||||
s.buckets = append(s.buckets, bucket32{})
|
||||
return &s.buckets[len(s.buckets)-1]
|
||||
}
|
||||
|
||||
// Has verifies whether x exists in s.
|
||||
|
|
@ -118,12 +101,10 @@ func (s *Set) Has(x uint64) bool {
|
|||
if s == nil {
|
||||
return false
|
||||
}
|
||||
if !s.skipSmallPool {
|
||||
return s.hasInSmallPool(x)
|
||||
}
|
||||
hi := uint32(x >> 32)
|
||||
lo := uint32(x)
|
||||
for _, b32 := range s.buckets {
|
||||
for i := range s.buckets {
|
||||
b32 := &s.buckets[i]
|
||||
if b32.hi == hi {
|
||||
return b32.has(lo)
|
||||
}
|
||||
|
|
@ -131,24 +112,12 @@ func (s *Set) Has(x uint64) bool {
|
|||
return false
|
||||
}
|
||||
|
||||
func (s *Set) hasInSmallPool(x uint64) bool {
|
||||
for _, v := range s.smallPool[:s.itemsCount] {
|
||||
if v == x {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// Del deletes x from s.
|
||||
func (s *Set) Del(x uint64) {
|
||||
if !s.skipSmallPool {
|
||||
s.delFromSmallPool(x)
|
||||
return
|
||||
}
|
||||
hi := uint32(x >> 32)
|
||||
lo := uint32(x)
|
||||
for _, b32 := range s.buckets {
|
||||
for i := range s.buckets {
|
||||
b32 := &s.buckets[i]
|
||||
if b32.hi == hi {
|
||||
if b32.del(lo) {
|
||||
s.itemsCount--
|
||||
|
|
@ -158,20 +127,6 @@ func (s *Set) Del(x uint64) {
|
|||
}
|
||||
}
|
||||
|
||||
func (s *Set) delFromSmallPool(x uint64) {
|
||||
idx := -1
|
||||
for i, v := range s.smallPool[:s.itemsCount] {
|
||||
if v == x {
|
||||
idx = i
|
||||
}
|
||||
}
|
||||
if idx < 0 {
|
||||
return
|
||||
}
|
||||
copy(s.smallPool[idx:], s.smallPool[idx+1:])
|
||||
s.itemsCount--
|
||||
}
|
||||
|
||||
// AppendTo appends all the items from the set to dst and returns the result.
|
||||
//
|
||||
// The returned items are sorted.
|
||||
|
|
@ -181,13 +136,6 @@ func (s *Set) AppendTo(dst []uint64) []uint64 {
|
|||
if s == nil {
|
||||
return dst
|
||||
}
|
||||
if !s.skipSmallPool {
|
||||
a := s.smallPool[:s.itemsCount]
|
||||
if len(a) > 1 {
|
||||
sort.Slice(a, func(i, j int) bool { return a[i] < a[j] })
|
||||
}
|
||||
return append(dst, a...)
|
||||
}
|
||||
|
||||
// pre-allocate memory for dst
|
||||
dstLen := len(dst)
|
||||
|
|
@ -199,8 +147,8 @@ func (s *Set) AppendTo(dst []uint64) []uint64 {
|
|||
if !sort.IsSorted(&s.buckets) {
|
||||
sort.Sort(&s.buckets)
|
||||
}
|
||||
for _, b32 := range s.buckets {
|
||||
dst = b32.appendTo(dst)
|
||||
for i := range s.buckets {
|
||||
dst = s.buckets[i].appendTo(dst)
|
||||
}
|
||||
return dst
|
||||
}
|
||||
|
|
@ -265,36 +213,33 @@ func (s *Set) Equal(a *Set) bool {
|
|||
}
|
||||
|
||||
type bucket32 struct {
|
||||
skipSmallPool bool
|
||||
smallPoolLen int
|
||||
hi uint32
|
||||
b16his []uint16
|
||||
buckets []*bucket16
|
||||
smallPool [14]uint32
|
||||
hi uint32
|
||||
b16his []uint16
|
||||
buckets []bucket16
|
||||
}
|
||||
|
||||
func (b *bucket32) sizeBytes() uint64 {
|
||||
n := uint64(unsafe.Sizeof(*b))
|
||||
n += 2 * uint64(len(b.b16his))
|
||||
for _, b := range b.buckets {
|
||||
n += uint64(unsafe.Sizeof(b))
|
||||
n += b.sizeBytes()
|
||||
for i := range b.buckets {
|
||||
b16 := &b.buckets[i]
|
||||
n += uint64(unsafe.Sizeof(b16))
|
||||
n += b16.sizeBytes()
|
||||
}
|
||||
return n
|
||||
}
|
||||
|
||||
func (b *bucket32) clone() *bucket32 {
|
||||
var dst bucket32
|
||||
dst.skipSmallPool = b.skipSmallPool
|
||||
dst.smallPoolLen = b.smallPoolLen
|
||||
func (b *bucket32) copyTo(dst *bucket32) {
|
||||
dst.hi = b.hi
|
||||
dst.b16his = append(dst.b16his[:0], b.b16his...)
|
||||
dst.buckets = make([]*bucket16, len(b.buckets))
|
||||
dst.smallPool = b.smallPool
|
||||
for i, b16 := range b.buckets {
|
||||
dst.buckets[i] = b16.clone()
|
||||
// Do not reuse dst.buckets, since it may be used in other places.
|
||||
dst.buckets = nil
|
||||
if len(b.buckets) > 0 {
|
||||
dst.buckets = make([]bucket16, len(b.buckets))
|
||||
for i := range b.buckets {
|
||||
b.buckets[i].copyTo(&dst.buckets[i])
|
||||
}
|
||||
}
|
||||
return &dst
|
||||
}
|
||||
|
||||
// This is for sort.Interface
|
||||
|
|
@ -310,9 +255,6 @@ func (b *bucket32) Swap(i, j int) {
|
|||
const maxUnsortedBuckets = 32
|
||||
|
||||
func (b *bucket32) add(x uint32) bool {
|
||||
if !b.skipSmallPool {
|
||||
return b.addToSmallPool(x)
|
||||
}
|
||||
hi := uint16(x >> 16)
|
||||
lo := uint16(x)
|
||||
if len(b.buckets) > maxUnsortedBuckets {
|
||||
|
|
@ -327,33 +269,20 @@ func (b *bucket32) add(x uint32) bool {
|
|||
return true
|
||||
}
|
||||
|
||||
func (b *bucket32) addToSmallPool(x uint32) bool {
|
||||
if b.hasInSmallPool(x) {
|
||||
return false
|
||||
}
|
||||
if b.smallPoolLen < len(b.smallPool) {
|
||||
b.smallPool[b.smallPoolLen] = x
|
||||
b.smallPoolLen++
|
||||
return true
|
||||
}
|
||||
b.skipSmallPool = true
|
||||
b.smallPoolLen = 0
|
||||
for _, v := range b.smallPool[:] {
|
||||
b.add(v)
|
||||
}
|
||||
return b.add(x)
|
||||
}
|
||||
|
||||
func (b *bucket32) addAllocSmall(hi, lo uint16) {
|
||||
var b16 bucket16
|
||||
_ = b16.add(lo)
|
||||
b.b16his = append(b.b16his, hi)
|
||||
b.buckets = append(b.buckets, &b16)
|
||||
b16 := b.addBucket16()
|
||||
_ = b16.add(lo)
|
||||
if len(b.buckets) > maxUnsortedBuckets {
|
||||
sort.Sort(b)
|
||||
}
|
||||
}
|
||||
|
||||
func (b *bucket32) addBucket16() *bucket16 {
|
||||
b.buckets = append(b.buckets, bucket16{})
|
||||
return &b.buckets[len(b.buckets)-1]
|
||||
}
|
||||
|
||||
func (b *bucket32) addSlow(hi, lo uint16) bool {
|
||||
n := binarySearch16(b.b16his, hi)
|
||||
if n < 0 || n >= len(b.b16his) || b.b16his[n] != hi {
|
||||
|
|
@ -368,23 +297,21 @@ func (b *bucket32) addAllocBig(hi, lo uint16, n int) {
|
|||
// This is a hint to Go compiler to remove automatic bounds checks below.
|
||||
return
|
||||
}
|
||||
var b16 bucket16
|
||||
_ = b16.add(lo)
|
||||
if n >= len(b.b16his) {
|
||||
b.b16his = append(b.b16his, hi)
|
||||
b.buckets = append(b.buckets, &b16)
|
||||
b16 := b.addBucket16()
|
||||
_ = b16.add(lo)
|
||||
return
|
||||
}
|
||||
b.b16his = append(b.b16his[:n+1], b.b16his[n:]...)
|
||||
b.b16his[n] = hi
|
||||
b.buckets = append(b.buckets[:n+1], b.buckets[n:]...)
|
||||
b.buckets[n] = &b16
|
||||
b16 := &b.buckets[n]
|
||||
*b16 = bucket16{}
|
||||
_ = b16.add(lo)
|
||||
}
|
||||
|
||||
func (b *bucket32) has(x uint32) bool {
|
||||
if !b.skipSmallPool {
|
||||
return b.hasInSmallPool(x)
|
||||
}
|
||||
hi := uint16(x >> 16)
|
||||
lo := uint16(x)
|
||||
if len(b.buckets) > maxUnsortedBuckets {
|
||||
|
|
@ -398,15 +325,6 @@ func (b *bucket32) has(x uint32) bool {
|
|||
return false
|
||||
}
|
||||
|
||||
func (b *bucket32) hasInSmallPool(x uint32) bool {
|
||||
for _, v := range b.smallPool[:b.smallPoolLen] {
|
||||
if v == x {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (b *bucket32) hasSlow(hi, lo uint16) bool {
|
||||
n := binarySearch16(b.b16his, hi)
|
||||
if n < 0 || n >= len(b.b16his) || b.b16his[n] != hi {
|
||||
|
|
@ -416,9 +334,6 @@ func (b *bucket32) hasSlow(hi, lo uint16) bool {
|
|||
}
|
||||
|
||||
func (b *bucket32) del(x uint32) bool {
|
||||
if !b.skipSmallPool {
|
||||
return b.delFromSmallPool(x)
|
||||
}
|
||||
hi := uint16(x >> 16)
|
||||
lo := uint16(x)
|
||||
if len(b.buckets) > maxUnsortedBuckets {
|
||||
|
|
@ -432,21 +347,6 @@ func (b *bucket32) del(x uint32) bool {
|
|||
return false
|
||||
}
|
||||
|
||||
func (b *bucket32) delFromSmallPool(x uint32) bool {
|
||||
idx := -1
|
||||
for i, v := range b.smallPool[:b.smallPoolLen] {
|
||||
if v == x {
|
||||
idx = i
|
||||
}
|
||||
}
|
||||
if idx < 0 {
|
||||
return false
|
||||
}
|
||||
copy(b.smallPool[idx:], b.smallPool[idx+1:])
|
||||
b.smallPoolLen--
|
||||
return true
|
||||
}
|
||||
|
||||
func (b *bucket32) delSlow(hi, lo uint16) bool {
|
||||
n := binarySearch16(b.b16his, hi)
|
||||
if n < 0 || n >= len(b.b16his) || b.b16his[n] != hi {
|
||||
|
|
@ -456,24 +356,12 @@ func (b *bucket32) delSlow(hi, lo uint16) bool {
|
|||
}
|
||||
|
||||
func (b *bucket32) appendTo(dst []uint64) []uint64 {
|
||||
if !b.skipSmallPool {
|
||||
a := b.smallPool[:b.smallPoolLen]
|
||||
if len(a) > 1 {
|
||||
sort.Slice(a, func(i, j int) bool { return a[i] < a[j] })
|
||||
}
|
||||
hi := uint64(b.hi) << 32
|
||||
for _, lo32 := range a {
|
||||
v := hi | uint64(lo32)
|
||||
dst = append(dst, v)
|
||||
}
|
||||
return dst
|
||||
}
|
||||
if len(b.buckets) <= maxUnsortedBuckets && !sort.IsSorted(b) {
|
||||
sort.Sort(b)
|
||||
}
|
||||
for i, b16 := range b.buckets {
|
||||
for i := range b.buckets {
|
||||
hi16 := b.b16his[i]
|
||||
dst = b16.appendTo(dst, b.hi, hi16)
|
||||
dst = b.buckets[i].appendTo(dst, b.hi, hi16)
|
||||
}
|
||||
return dst
|
||||
}
|
||||
|
|
@ -484,20 +372,30 @@ const (
|
|||
)
|
||||
|
||||
type bucket16 struct {
|
||||
bits [wordsPerBucket]uint64
|
||||
bits *[wordsPerBucket]uint64
|
||||
smallPoolLen int
|
||||
smallPool [56]uint16
|
||||
}
|
||||
|
||||
func (b *bucket16) sizeBytes() uint64 {
|
||||
return uint64(unsafe.Sizeof(*b))
|
||||
return uint64(unsafe.Sizeof(*b)) + uint64(unsafe.Sizeof(*b.bits))
|
||||
}
|
||||
|
||||
func (b *bucket16) clone() *bucket16 {
|
||||
var dst bucket16
|
||||
copy(dst.bits[:], b.bits[:])
|
||||
return &dst
|
||||
func (b *bucket16) copyTo(dst *bucket16) {
|
||||
// Do not reuse dst.bits, since it may be used in other places.
|
||||
dst.bits = nil
|
||||
if b.bits != nil {
|
||||
bits := *b.bits
|
||||
dst.bits = &bits
|
||||
}
|
||||
dst.smallPoolLen = b.smallPoolLen
|
||||
dst.smallPool = b.smallPool
|
||||
}
|
||||
|
||||
func (b *bucket16) add(x uint16) bool {
|
||||
if b.bits == nil {
|
||||
return b.addToSmallPool(x)
|
||||
}
|
||||
wordNum, bitMask := getWordNumBitMask(x)
|
||||
word := &b.bits[wordNum]
|
||||
ok := *word&bitMask == 0
|
||||
|
|
@ -505,12 +403,46 @@ func (b *bucket16) add(x uint16) bool {
|
|||
return ok
|
||||
}
|
||||
|
||||
func (b *bucket16) addToSmallPool(x uint16) bool {
|
||||
if b.hasInSmallPool(x) {
|
||||
return false
|
||||
}
|
||||
if b.smallPoolLen < len(b.smallPool) {
|
||||
b.smallPool[b.smallPoolLen] = x
|
||||
b.smallPoolLen++
|
||||
return true
|
||||
}
|
||||
b.smallPoolLen = 0
|
||||
var bits [wordsPerBucket]uint64
|
||||
b.bits = &bits
|
||||
for _, v := range b.smallPool[:] {
|
||||
b.add(v)
|
||||
}
|
||||
b.add(x)
|
||||
return true
|
||||
}
|
||||
|
||||
func (b *bucket16) has(x uint16) bool {
|
||||
if b.bits == nil {
|
||||
return b.hasInSmallPool(x)
|
||||
}
|
||||
wordNum, bitMask := getWordNumBitMask(x)
|
||||
return b.bits[wordNum]&bitMask != 0
|
||||
}
|
||||
|
||||
func (b *bucket16) hasInSmallPool(x uint16) bool {
|
||||
for _, v := range b.smallPool[:b.smallPoolLen] {
|
||||
if v == x {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (b *bucket16) del(x uint16) bool {
|
||||
if b.bits == nil {
|
||||
return b.delFromSmallPool(x)
|
||||
}
|
||||
wordNum, bitMask := getWordNumBitMask(x)
|
||||
word := &b.bits[wordNum]
|
||||
ok := *word&bitMask != 0
|
||||
|
|
@ -518,8 +450,30 @@ func (b *bucket16) del(x uint16) bool {
|
|||
return ok
|
||||
}
|
||||
|
||||
func (b *bucket16) delFromSmallPool(x uint16) bool {
|
||||
for i, v := range b.smallPool[:b.smallPoolLen] {
|
||||
if v == x {
|
||||
copy(b.smallPool[i:], b.smallPool[i+1:])
|
||||
b.smallPoolLen--
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (b *bucket16) appendTo(dst []uint64, hi uint32, hi16 uint16) []uint64 {
|
||||
hi64 := uint64(hi)<<32 | uint64(hi16)<<16
|
||||
if b.bits == nil {
|
||||
a := b.smallPool[:b.smallPoolLen]
|
||||
if len(a) > 1 {
|
||||
sort.Slice(a, func(i, j int) bool { return a[i] < a[j] })
|
||||
}
|
||||
for _, v := range a {
|
||||
x := hi64 | uint64(v)
|
||||
dst = append(dst, x)
|
||||
}
|
||||
return dst
|
||||
}
|
||||
var wordNum uint64
|
||||
for _, word := range b.bits {
|
||||
if word == 0 {
|
||||
|
|
|
|||
Loading…
Reference in a new issue