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find_subroutines_amd64_test.go
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//+build !noasm
//+build !appengine
//+build gc
/*
* MinIO Cloud Storage, (C) 2020 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package simdjson
import (
"reflect"
"runtime"
"strings"
"sync"
"testing"
"github.com/klauspost/cpuid"
)
func TestFinalizeStructurals(t *testing.T) {
testCases := []struct {
structurals uint64
whitespace uint64
quote_mask uint64
quote_bits uint64
expected_strls uint64
expected_pseudo uint64
}{
{0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
{0x1, 0x0, 0x0, 0x0, 0x3, 0x0},
{0x2, 0x0, 0x0, 0x0, 0x6, 0x0},
// test to mask off anything inside quotes
{0x2, 0x0, 0xf, 0x0, 0x0, 0x0},
// test to add the real quote bits
{0x8, 0x0, 0x0, 0x10, 0x28, 0x0},
// whether the previous iteration ended on a whitespace
{0x0, 0x8000000000000000, 0x0, 0x0, 0x0, 0x1},
// whether the previous iteration ended on a structural character
{0x8000000000000000, 0x0, 0x0, 0x0, 0x8000000000000000, 0x1},
{0xf, 0xf0, 0xf00, 0xf000, 0x1000f, 0x0},
}
for i, tc := range testCases {
prev_iter_ends_pseudo_pred := uint64(0)
structurals := finalize_structurals(tc.structurals, tc.whitespace, tc.quote_mask, tc.quote_bits, &prev_iter_ends_pseudo_pred)
if structurals != tc.expected_strls {
t.Errorf("TestFinalizeStructurals(%d): got: 0x%x want: 0x%x", i, structurals, tc.expected_strls)
}
if prev_iter_ends_pseudo_pred != tc.expected_pseudo {
t.Errorf("TestFinalizeStructurals(%d): got: 0x%x want: 0x%x", i, prev_iter_ends_pseudo_pred, tc.expected_pseudo)
}
}
}
func testFindNewlineDelimiters(t *testing.T, f func([]byte, uint64) uint64) {
want := []uint64{
0b0000000000000000000000000000000000000000000000000000000000000000,
0b0000000000000000000000000000000000000000000000000000000000000000,
0b0000000000000000000000000000000000000000000000000000000000000000,
0b0000000000000000000000000000000000000000000000000000000000010000,
0b0000000000000000000000000000000000000000000000000000000000000000,
0b0000000000000000000000000000000000000000000000000000000000000000,
0b0000000000000000000000000000000000000000000000000000001000000000,
0b0000000000000000000000000000000000000000000000000000000000000000,
0b0000000000000000000000000000000000000000000000000000000000000000,
}
for offset := 0; offset < len(demo_ndjson)-64; offset += 64 {
mask := f([]byte(demo_ndjson)[offset:], 0)
if mask != want[offset>>6] {
t.Errorf("testFindNewlineDelimiters: got: %064b want: %064b", mask, want[offset>>6])
}
}
}
func TestFindNewlineDelimiters(t *testing.T) {
t.Run("avx2", func(t *testing.T) {
testFindNewlineDelimiters(t, _find_newline_delimiters)
})
if cpuid.CPU.AVX512F() {
t.Run("avx512", func(t *testing.T) {
testFindNewlineDelimiters(t, _find_newline_delimiters_avx512)
})
}
}
func testExcludeNewlineDelimitersWithinQuotes(t *testing.T, f func([]byte, uint64) uint64) {
input := []byte(` "-------------------------------------" `)
input[10] = 0x0a // within quoted string, so should be ignored
input[50] = 0x0a // outside quoted string, so should be found
prev_iter_inside_quote, quote_bits, error_mask := uint64(0), uint64(0), uint64(0)
odd_ends := uint64(0)
quotemask := find_quote_mask_and_bits(input, odd_ends, &prev_iter_inside_quote, "e_bits, &error_mask)
mask := f(input, quotemask)
want := uint64(1 << 50)
if mask != want {
t.Errorf("testExcludeNewlineDelimitersWithinQuotes: got: %064b want: %064b", mask, want)
}
}
func TestExcludeNewlineDelimitersWithinQuotes(t *testing.T) {
t.Run("avx2", func(t *testing.T) {
testExcludeNewlineDelimitersWithinQuotes(t, _find_newline_delimiters)
})
if cpuid.CPU.AVX512F() {
t.Run("avx512", func(t *testing.T) {
testExcludeNewlineDelimitersWithinQuotes(t, _find_newline_delimiters_avx512)
})
}
}
func testFindOddBackslashSequences(t *testing.T, f func([]byte, *uint64) uint64) {
testCases := []struct {
prev_ends_odd uint64
input string
expected uint64
ends_odd_backslash uint64
}{
{0, ` `, 0x0, 0},
{0, `\" `, 0x2, 0},
{0, ` \" `, 0x8, 0},
{0, ` \" `, 0x200, 0},
{0, ` \" `, 0x10000000, 0},
{0, ` \" `, 0x100000000, 0},
{0, ` \"`, 0x8000000000000000, 0},
{0, ` \`, 0x0, 1},
{0, `\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"`, 0xaaaaaaaaaaaaaaaa, 0},
{0, `"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\`, 0x5555555555555554, 1},
{1, ` `, 0x1, 0},
{1, `\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"`, 0xaaaaaaaaaaaaaaa8, 0},
{1, `"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\`, 0x5555555555555555, 1},
}
for i, tc := range testCases {
prev_iter_ends_odd_backslash := tc.prev_ends_odd
mask := f([]byte(tc.input), &prev_iter_ends_odd_backslash)
if mask != tc.expected {
t.Errorf("testFindOddBackslashSequences(%d): got: 0x%x want: 0x%x", i, mask, tc.expected)
}
if prev_iter_ends_odd_backslash != tc.ends_odd_backslash {
t.Errorf("testFindOddBackslashSequences(%d): got: %v want: %v", i, prev_iter_ends_odd_backslash, tc.ends_odd_backslash)
}
}
// prepend test string with longer space, making sure shift to next 256-bit word is fine
for i := uint(1); i <= 128; i++ {
test := strings.Repeat(" ", int(i-1)) + `\"` + strings.Repeat(" ", 62+64)
prev_iter_ends_odd_backslash := uint64(0)
mask_lo := f([]byte(test), &prev_iter_ends_odd_backslash)
mask_hi := f([]byte(test[64:]), &prev_iter_ends_odd_backslash)
if i < 64 {
if mask_lo != 1<<i || mask_hi != 0 {
t.Errorf("testFindOddBackslashSequences(%d): got: lo = 0x%x; hi = 0x%x want: 0x%x 0x0", i, mask_lo, mask_hi, 1<<i)
}
} else {
if mask_lo != 0 || mask_hi != 1<<(i-64) {
t.Errorf("testFindOddBackslashSequences(%d): got: lo = 0x%x; hi = 0x%x want: 0x0 0x%x", i, mask_lo, mask_hi, 1<<(i-64))
}
}
}
}
func TestFindOddBackslashSequences(t *testing.T) {
t.Run("avx2", func(t *testing.T) {
testFindOddBackslashSequences(t, find_odd_backslash_sequences)
})
if cpuid.CPU.AVX512F() {
t.Run("avx512", func(t *testing.T) {
testFindOddBackslashSequences(t, find_odd_backslash_sequences_avx512)
})
}
}
func testFindQuoteMaskAndBits(t *testing.T, f func([]byte, uint64, *uint64, *uint64, *uint64) uint64) {
testCases := []struct {
inputOE uint64 // odd_ends
input string
expected uint64
expectedQB uint64 // quote_bits
expectedPIIQ uint64 // prev_iter_inside_quote
expectedEM uint64 // error_mask
}{
{0x0, ` "" `, 0x4, 0xc, 0 ,0},
{0x0, ` "-" `, 0xc, 0x14, 0 ,0},
{0x0, ` "--" `, 0x1c, 0x24, 0 ,0},
{0x0, ` "---" `, 0x3c, 0x44, 0 ,0},
{0x0, ` "-------------" `, 0xfffc, 0x10004, 0 ,0},
{0x0, ` "---------------------------------------" `, 0x3fffffffffc, 0x40000000004, 0 ,0},
{0x0, `"--------------------------------------------------------------"`, 0x7fffffffffffffff, 0x8000000000000001, 0 ,0},
// quote is not closed --> prev_iter_inside_quote should be set
{0x0, ` "---`, 0xf000000000000000, 0x1000000000000000, ^uint64(0) ,0},
{0x0, ` "", `, 0x1000000000000000, 0x3000000000000000, 0 ,0},
{0x0, ` "-",`, 0x3000000000000000, 0x5000000000000000, 0 ,0},
{0x0, ` "--"`, 0x7000000000000000, 0x9000000000000000, 0 ,0},
{0x0, ` "---`, 0xf000000000000000, 0x1000000000000000, ^uint64(0),0},
// test previous mask ending in backslash
{0x1, `" `, 0x0, 0x0, 0x0,0x0},
{0x1, `""" `, 0x2, 0x6, 0x0 ,0x0},
{0x0, `" `, 0xffffffffffffffff, 0x1, ^uint64(0),0x0},
{0x0, `""" `, 0xfffffffffffffffd, 0x7, ^uint64(0), 0x0},
// test invalid chars (< 0x20) that are enclosed in quotes
{0x0, `"` + string([]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}) + ` " `, 0x3ffffffff, 0x400000001, 0, 0x1fffffffe},
{0x0, `"` + string([]byte{0, 32, 1, 32, 2, 32, 3, 32, 4, 32, 5, 32, 6, 32, 7, 32, 8, 32, 9, 32, 10, 32, 11, 32, 12, 32, 13, 32, 14, 32, 15, 32, 16, 32, 17, 32, 18, 32, 19, 32, 20, 32, 21, 32, 22, 32, 23, 32, 24, 32, 25, 32, 26, 32, 27, 32, 28, 32, 29, 32, 31}) + ` "`, 0x7fffffffffffffff, 0x8000000000000001, 0, 0x2aaaaaaaaaaaaaaa},
{0x0, `" ` + string([]byte{0, 32, 1, 32, 2, 32, 3, 32, 4, 32, 5, 32, 6, 32, 7, 32, 8, 32, 9, 32, 10, 32, 11, 32, 12, 32, 13, 32, 14, 32, 15, 32, 16, 32, 17, 32, 18, 32, 19, 32, 20, 32, 21, 32, 22, 32, 23, 32, 24, 32, 25, 32, 26, 32, 27, 32, 28, 32, 29, 32, 31}) + `"`, 0x7fffffffffffffff, 0x8000000000000001, 0, 0x5555555555555554},
}
for i, tc := range testCases {
prev_iter_inside_quote, quote_bits, error_mask := uint64(0), uint64(0), uint64(0)
mask := f([]byte(tc.input), tc.inputOE, &prev_iter_inside_quote, "e_bits, &error_mask)
if mask != tc.expected {
t.Errorf("testFindQuoteMaskAndBits(%d): got: 0x%x want: 0x%x", i, mask, tc.expected)
}
if quote_bits != tc.expectedQB {
t.Errorf("testFindQuoteMaskAndBits(%d): got quote_bits: 0x%x want: 0x%x", i, quote_bits, tc.expectedQB)
}
if prev_iter_inside_quote != tc.expectedPIIQ {
t.Errorf("testFindQuoteMaskAndBits(%d): got prev_iter_inside_quote: 0x%x want: 0x%x", i, prev_iter_inside_quote, tc.expectedPIIQ)
}
if error_mask != tc.expectedEM {
t.Errorf("testFindQuoteMaskAndBits(%d): got error_mask: 0x%x want: 0x%x", i, error_mask, tc.expectedEM)
}
}
testCasesPIIQ := []struct {
inputPIIQ uint64
input string
expectedPIIQ uint64
}{
// prev_iter_inside_quote state remains unchanged
{ uint64(0), `----------------------------------------------------------------`, uint64(0)},
{ ^uint64(0), `----------------------------------------------------------------`, ^uint64(0)},
// prev_iter_inside_quote state remains flips
{ uint64(0), `---------------------------"------------------------------------`, ^uint64(0)},
{ ^uint64(0), `---------------------------"------------------------------------`, uint64(0)},
// prev_iter_inside_quote state remains flips twice (thus unchanged)
{ uint64(0), `----------------"------------------------"----------------------`, uint64(0)},
{ ^uint64(0), `----------------"------------------------"----------------------`, ^uint64(0)},
}
for i, tc := range testCasesPIIQ {
prev_iter_inside_quote, quote_bits, error_mask := tc.inputPIIQ, uint64(0), uint64(0)
f([]byte(tc.input), 0, &prev_iter_inside_quote, "e_bits, &error_mask)
if prev_iter_inside_quote != tc.expectedPIIQ {
t.Errorf("testFindQuoteMaskAndBits(%d): got prev_iter_inside_quote: 0x%x want: 0x%x", i, prev_iter_inside_quote, tc.expectedPIIQ)
}
}
}
func TestFindQuoteMaskAndBits(t *testing.T) {
t.Run("avx2", func(t *testing.T) {
testFindQuoteMaskAndBits(t, find_quote_mask_and_bits)
})
if cpuid.CPU.AVX512F() {
t.Run("avx512", func(t *testing.T) {
testFindQuoteMaskAndBits(t, find_quote_mask_and_bits_avx512)
})
}
}
func testFindStructuralBits(t *testing.T, f func([]byte, *uint64, *uint64, *uint64, uint64, *uint64) uint64) {
testCases := []struct {
input string
}{
{`{"Image":{"Width":800,"Height":600,"Title":"View from 15th Floor`},
{`","Thumbnail":{"Url":"http://www.example.com/image/481989943","H`},
{`eight":125,"Width":100},"Animated":false,"IDs":[116,943,234,3879`},
}
prev_iter_ends_odd_backslash := uint64(0)
prev_iter_inside_quote := uint64(0) // either all zeros or all ones
prev_iter_ends_pseudo_pred := uint64(1)
error_mask := uint64(0) // for unescaped characters within strings (ASCII code points < 0x20)
structurals := uint64(0)
// Declare same variables for 'multiple_calls' version
prev_iter_ends_odd_backslash_MC := uint64(0)
prev_iter_inside_quote_MC := uint64(0) // either all zeros or all ones
prev_iter_ends_pseudo_pred_MC := uint64(1)
error_mask_MC := uint64(0) // for unescaped characters within strings (ASCII code points < 0x20)
structurals_MC := uint64(0)
for i, tc := range testCases {
// Call assembly routines as a single method
structurals := f([]byte(tc.input), &prev_iter_ends_odd_backslash,
&prev_iter_inside_quote, &error_mask,
structurals,
&prev_iter_ends_pseudo_pred)
// Call assembly routines individually
structurals_MC := find_structural_bits_multiple_calls([]byte(tc.input), &prev_iter_ends_odd_backslash_MC,
&prev_iter_inside_quote_MC, &error_mask_MC,
structurals_MC,
&prev_iter_ends_pseudo_pred_MC)
// And compare the results
if structurals != structurals_MC {
t.Errorf("TestFindStructuralBits(%d): got: 0x%x want: 0x%x", i, structurals, structurals_MC)
}
}
}
func TestFindStructuralBits(t *testing.T) {
t.Run("avx2", func(t *testing.T) {
testFindStructuralBits(t, find_structural_bits)
})
if cpuid.CPU.AVX512F() {
t.Run("avx512", func(t *testing.T) {
testFindStructuralBits(t, find_structural_bits_avx512)
})
}
}
func testFindStructuralBitsWhitespacePadding(t *testing.T, f func([]byte, *uint64, *uint64, *uint64, *uint64, *[INDEX_SIZE]uint32, *int, *uint64, *uint64, uint64) uint64) {
// Test whitespace padding (for partial load of last 64 bytes) with
// string full of structural characters
msg := `::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::`
for l := len(msg); l >= 0; l-- {
prev_iter_ends_odd_backslash := uint64(0)
prev_iter_inside_quote := uint64(0) // either all zeros or all ones
prev_iter_ends_pseudo_pred := uint64(1)
error_mask := uint64(0) // for unescaped characters within strings (ASCII code points < 0x20)
carried := ^uint64(0)
position := ^uint64(0)
index := indexChan{}
index.indexes = &[INDEX_SIZE]uint32{}
processed := find_structural_bits_in_slice([]byte(msg[:l]), &prev_iter_ends_odd_backslash,
&prev_iter_inside_quote, &error_mask,
&prev_iter_ends_pseudo_pred,
index.indexes, &index.length, &carried, &position, 0)
if processed != uint64(l) {
t.Errorf("testFindStructuralBitsWhitespacePadding(%d): got: %d want: %d", l, processed, l)
}
if index.length != l {
t.Errorf("testFindStructuralBitsWhitespacePadding(%d): got: %d want: %d", l, index.length, l)
}
// Compute offset of last (structural) character and verify it points to the end of the message
lastChar := uint64(0)
for i := 0; i < index.length; i++ {
lastChar += uint64(index.indexes[i])
}
if l > 0 {
if lastChar != uint64(l-1) {
t.Errorf("testFindStructuralBitsWhitespacePadding(%d): got: %d want: %d", l, lastChar, uint64(l-1))
}
} else {
if lastChar != uint64(l-1)-carried {
t.Errorf("testFindStructuralBitsWhitespacePadding(%d): got: %d want: %d", l, lastChar, uint64(l-1)-carried)
}
}
}
}
func TestFindStructuralBitsWhitespacePadding(t *testing.T) {
t.Run("avx2", func(t *testing.T) {
testFindStructuralBitsWhitespacePadding(t, find_structural_bits_in_slice)
})
if cpuid.CPU.AVX512F() {
t.Run("avx512", func(t *testing.T) {
testFindStructuralBitsWhitespacePadding(t, find_structural_bits_in_slice_avx512)
})
}
}
func testFindStructuralBitsLoop(t *testing.T, f func([]byte, *uint64, *uint64, *uint64, *uint64, *[INDEX_SIZE]uint32, *int, *uint64, *uint64, uint64) uint64) {
msg := loadCompressed(t, "twitter")
prev_iter_ends_odd_backslash := uint64(0)
prev_iter_inside_quote := uint64(0) // either all zeros or all ones
prev_iter_ends_pseudo_pred := uint64(1)
error_mask := uint64(0) // for unescaped characters within strings (ASCII code points < 0x20)
carried := ^uint64(0)
position := ^uint64(0)
indexes := make([]uint32, 0)
for processed := uint64(0); processed < uint64(len(msg)); {
index := indexChan{}
index.indexes = &[INDEX_SIZE]uint32{}
processed += f(msg[processed:], &prev_iter_ends_odd_backslash,
&prev_iter_inside_quote, &error_mask,
&prev_iter_ends_pseudo_pred,
index.indexes, &index.length, &carried, &position, 0)
indexes = append(indexes, (*index.indexes)[:index.length]...)
}
// Last 5 expected structural (in reverse order)
const expectedStructuralsReversed = `}}":"`
const expectedLength = 55263
if len(indexes) != expectedLength {
t.Errorf("TestFindStructuralBitsLoop: got: %d want: %d", len(indexes), expectedLength)
}
pos, j := len(msg)-1, 0
for i := len(indexes) - 1; i >= len(indexes)-len(expectedStructuralsReversed); i-- {
if msg[pos] != expectedStructuralsReversed[j] {
t.Errorf("TestFindStructuralBitsLoop: got: %c want: %c", msg[pos], expectedStructuralsReversed[j])
}
pos -= int(indexes[i])
j++
}
}
func TestFindStructuralBitsLoop(t *testing.T) {
t.Run("avx2", func(t *testing.T) {
testFindStructuralBitsLoop(t, find_structural_bits_in_slice)
})
if cpuid.CPU.AVX512F() {
t.Run("avx512", func(t *testing.T) {
testFindStructuralBitsLoop(t, find_structural_bits_in_slice_avx512)
})
}
}
func benchmarkFindStructuralBits(b *testing.B, f func([]byte, *uint64, *uint64, *uint64, uint64, *uint64) uint64) {
const msg = " "
b.SetBytes(int64(len(msg)))
b.ReportAllocs()
b.ResetTimer()
prev_iter_ends_odd_backslash := uint64(0)
prev_iter_inside_quote := uint64(0) // either all zeros or all ones
prev_iter_ends_pseudo_pred := uint64(1)
error_mask := uint64(0) // for unescaped characters within strings (ASCII code points < 0x20)
structurals := uint64(0)
for i := 0; i < b.N; i++ {
f([]byte(msg), &prev_iter_ends_odd_backslash,
&prev_iter_inside_quote, &error_mask,
structurals,
&prev_iter_ends_pseudo_pred)
}
}
func BenchmarkFindStructuralBits(b *testing.B) {
b.Run("avx2", func(b *testing.B) {
benchmarkFindStructuralBits(b, find_structural_bits)
})
if cpuid.CPU.AVX512F() {
b.Run("avx512", func(b *testing.B) {
benchmarkFindStructuralBits(b, find_structural_bits_avx512)
})
}
}
func benchmarkFindStructuralBitsLoop(b *testing.B, f func([]byte, *uint64, *uint64, *uint64, *uint64, *[INDEX_SIZE]uint32, *int, *uint64, *uint64, uint64) uint64) {
msg := loadCompressed(b, "twitter")
prev_iter_ends_odd_backslash := uint64(0)
prev_iter_inside_quote := uint64(0) // either all zeros or all ones
prev_iter_ends_pseudo_pred := uint64(1)
error_mask := uint64(0) // for unescaped characters within strings (ASCII code points < 0x20)
carried := ^uint64(0)
position := ^uint64(0)
b.SetBytes(int64(len(msg)))
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
for processed := uint64(0); processed < uint64(len(msg)); {
index := indexChan{}
index.indexes = &[INDEX_SIZE]uint32{}
processed += f(msg[processed:], &prev_iter_ends_odd_backslash,
&prev_iter_inside_quote, &error_mask,
&prev_iter_ends_pseudo_pred,
index.indexes, &index.length, &carried, &position, 0)
}
}
}
func BenchmarkFindStructuralBitsLoop(b *testing.B) {
b.Run("avx2", func(b *testing.B) {
benchmarkFindStructuralBitsLoop(b, find_structural_bits_in_slice)
})
if cpuid.CPU.AVX512F() {
b.Run("avx512", func(b *testing.B) {
benchmarkFindStructuralBitsLoop(b, find_structural_bits_in_slice_avx512)
})
}
}
func benchmarkFindStructuralBitsParallelLoop(b *testing.B, f func([]byte, *uint64, *uint64, *uint64, *uint64, *[INDEX_SIZE]uint32, *int, *uint64, *uint64, uint64) uint64) {
msg := loadCompressed(b, "twitter")
cpus := runtime.NumCPU()
b.SetBytes(int64(len(msg) * cpus))
b.ResetTimer()
for i := 0; i < b.N; i++ {
var wg sync.WaitGroup
wg.Add(cpus)
for cpu := 0; cpu < cpus; cpu++ {
go func() {
prev_iter_ends_odd_backslash := uint64(0)
prev_iter_inside_quote := uint64(0) // either all zeros or all ones
prev_iter_ends_pseudo_pred := uint64(1)
error_mask := uint64(0) // for unescaped characters within strings (ASCII code points < 0x20)
carried := ^uint64(0)
position := ^uint64(0)
for processed := uint64(0); processed < uint64(len(msg)); {
index := indexChan{}
index.indexes = &[INDEX_SIZE]uint32{}
processed += f(msg[processed:], &prev_iter_ends_odd_backslash,
&prev_iter_inside_quote, &error_mask,
&prev_iter_ends_pseudo_pred,
index.indexes, &index.length, &carried, &position, 0)
}
defer wg.Done()
}()
}
wg.Wait()
}
}
func BenchmarkFindStructuralBitsParallelLoop(b *testing.B) {
b.Run("avx2", func(b *testing.B) {
benchmarkFindStructuralBitsParallelLoop(b, find_structural_bits_in_slice)
})
if cpuid.CPU.AVX512F() {
b.Run("avx512", func(b *testing.B) {
benchmarkFindStructuralBitsParallelLoop(b, find_structural_bits_in_slice_avx512)
})
}
}
// find_structural_bits version that calls the individual assembly routines individually
func find_structural_bits_multiple_calls(buf []byte, prev_iter_ends_odd_backslash *uint64,
prev_iter_inside_quote, error_mask *uint64,
structurals uint64,
prev_iter_ends_pseudo_pred *uint64) uint64 {
quote_bits := uint64(0)
whitespace_mask := uint64(0)
odd_ends := find_odd_backslash_sequences(buf, prev_iter_ends_odd_backslash)
// detect insides of quote pairs ("quote_mask") and also our quote_bits themselves
quote_mask := find_quote_mask_and_bits(buf, odd_ends, prev_iter_inside_quote, "e_bits, error_mask)
find_whitespace_and_structurals(buf, &whitespace_mask, &structurals)
// fixup structurals to reflect quotes and add pseudo-structural characters
return finalize_structurals(structurals, whitespace_mask, quote_mask, quote_bits, prev_iter_ends_pseudo_pred)
}
func testFindWhitespaceAndStructurals(t *testing.T, f func([]byte, *uint64, *uint64)) {
testCases := []struct {
input string
expected_ws uint64
expected_strls uint64
}{
{`aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa`, 0x0, 0x0},
{` aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa`, 0x1, 0x0},
{`:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa`, 0x0, 0x1},
{` :aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa`, 0x1, 0x2},
{`: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa`, 0x2, 0x1},
{`aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `, 0x8000000000000000, 0x0},
{`aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa:`, 0x0, 0x8000000000000000},
{`a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a `, 0xaaaaaaaaaaaaaaaa, 0x0},
{` a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a`, 0x5555555555555555, 0x0},
{`a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:`, 0x0, 0xaaaaaaaaaaaaaaaa},
{`:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a:a`, 0x0, 0x5555555555555555},
{` `, 0xffffffffffffffff, 0x0},
{`{ `, 0xfffffffffffffffe, 0x1},
{`} `, 0xfffffffffffffffe, 0x1},
{`" `, 0xfffffffffffffffe, 0x0},
{`::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::`, 0x0, 0xffffffffffffffff},
{`{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{`, 0x0, 0xffffffffffffffff},
{`}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}`, 0x0, 0xffffffffffffffff},
{` : `, 0xfffffffffffffffb, 0x4},
{` : `, 0xffffffffffffffef, 0x10},
{` : : : : : :`, 0x7fffefffbff7efbf, 0x8000100040081040},
{demo_json, 0x421000000000000, 0x40440220301},
}
for i, tc := range testCases {
whitespace := uint64(0)
structurals := uint64(0)
f([]byte(tc.input), &whitespace, &structurals)
if whitespace != tc.expected_ws {
t.Errorf("testFindWhitespaceAndStructurals(%d): got: 0x%x want: 0x%x", i, whitespace, tc.expected_ws)
}
if structurals != tc.expected_strls {
t.Errorf("testFindWhitespaceAndStructurals(%d): got: 0x%x want: 0x%x", i, structurals, tc.expected_strls)
}
}
}
func TestFindWhitespaceAndStructurals(t *testing.T) {
t.Run("avx2", func(t *testing.T) {
testFindWhitespaceAndStructurals(t, find_whitespace_and_structurals)
})
if cpuid.CPU.AVX512F() {
t.Run("avx512", func(t *testing.T) {
testFindWhitespaceAndStructurals(t, find_whitespace_and_structurals_avx512)
})
}
}
func TestFlattenBitsIncremental(t *testing.T) {
testCases := []struct {
masks []uint64
expected []uint32
}{
// Single mask
{[]uint64{0x11}, []uint32{0x1, 0x4}},
{[]uint64{0x100100100100}, []uint32{0x9, 0xc, 0xc, 0xc}},
{[]uint64{0x100100100300}, []uint32{0x9, 0x1, 0xb, 0xc, 0xc}},
{[]uint64{0x8101010101010101}, []uint32{0x1, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x7}},
{[]uint64{0x4000000000000000}, []uint32{0x3f}},
{[]uint64{0x8000000000000000}, []uint32{0x40}},
{[]uint64{0xf000000000000000}, []uint32{0x3d, 0x1, 0x1, 0x1}},
{[]uint64{0xffffffffffffffff}, []uint32{
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
}},
////
//// Multiple masks
{[]uint64{0x1, 0x1000}, []uint32{0x1, 0x4c}},
{[]uint64{0x1, 0x4000000000000000}, []uint32{0x1, 0x7e}},
{[]uint64{0x1, 0x8000000000000000}, []uint32{0x1, 0x7f}},
{[]uint64{0x1, 0x0, 0x8000000000000000}, []uint32{0x1, 0xbf}},
{[]uint64{0x1, 0x0, 0x0, 0x8000000000000000}, []uint32{0x1, 0xff}},
{[]uint64{0x100100100100100, 0x100100100100100}, []uint32{0x9, 0xc, 0xc, 0xc, 0xc, 0x10, 0xc, 0xc, 0xc, 0xc}},
{[]uint64{0xffffffffffffffff, 0xffffffffffffffff}, []uint32{
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1,
}},
}
for i, tc := range testCases {
index := indexChan{}
index.indexes = &[INDEX_SIZE]uint32{}
carried := 0
position := ^uint64(0)
for _, mask := range tc.masks {
flatten_bits_incremental(index.indexes, &index.length, mask, &carried, &position)
}
if index.length != len(tc.expected) {
t.Errorf("TestFlattenBitsIncremental(%d): got: %d want: %d", i, index.length, len(tc.expected))
}
compare := make([]uint32, 0, 1024)
for idx := 0; idx < index.length; idx++ {
compare = append(compare, index.indexes[idx])
}
if !reflect.DeepEqual(compare, tc.expected) {
t.Errorf("TestFlattenBitsIncremental(%d): got: %v want: %v", i, compare, tc.expected)
}
}
}
func BenchmarkFlattenBits(b *testing.B) {
msg := loadCompressed(b, "twitter")
prev_iter_ends_odd_backslash := uint64(0)
prev_iter_inside_quote := uint64(0) // either all zeros or all ones
prev_iter_ends_pseudo_pred := uint64(1)
error_mask := uint64(0) // for unescaped characters within strings (ASCII code points < 0x20)
structurals := uint64(0)
structuralsArray := make([]uint64, 0, len(msg)>>6)
// Collect all structurals into array
for i := 0; i < len(msg)-64; i += 64 {
find_structural_bits([]byte(msg)[i:], &prev_iter_ends_odd_backslash,
&prev_iter_inside_quote, &error_mask,
structurals,
&prev_iter_ends_pseudo_pred)
structuralsArray = append(structuralsArray, structurals)
}
b.SetBytes(int64(len(structuralsArray) * 8))
b.ReportAllocs()
b.ResetTimer()
index := indexChan{}
index.indexes = &[INDEX_SIZE]uint32{}
carried := 0
position := ^uint64(0)
for i := 0; i < b.N; i++ {
for _, structurals := range structuralsArray {
index.length = 0 // reset length to prevent overflow
flatten_bits_incremental(index.indexes, &index.length, structurals, &carried, &position)
}
}
}