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//
// Copyright (c) 2017 anygone contributors (see AUTHORS file)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * Neither the name of anygone nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
package satp
import (
"runtime"
"sync"
"testing"
)
func TestSequenceWindowDistance(t *testing.T) {
testvectors := []struct {
top uint32
seq uint32
less bool
distance uint32
}{
{0, 0, false, 0},
{1, 0, true, 1},
{1, 1, false, 0},
{10, 0, true, 10},
{0, 1, false, 1},
{0, 10, false, 10},
{10, 10, false, 0},
{10, 11, false, 1},
{10, 12, false, 2},
{0, ^uint32(0), true, 1},
{10, ^uint32(0), true, 11},
{^uint32(0), ^uint32(0), false, 0},
{^uint32(0), 0, false, 1},
{((^uint32(0)) / 2) - 1, 0, true, 2147483646},
{((^uint32(0)) / 2), 0, true, 2147483647},
{((^uint32(0)) / 2) + 1, 0, true, 2147483648},
{((^uint32(0)) / 2) + 1, 1, true, 2147483647},
{((^uint32(0)) / 2) + 1, 18, true, 2147483630},
{((^uint32(0)) / 2) + 1, ^uint32(0), false, 2147483647},
{((^uint32(0)) / 2) + 2, 0, false, 2147483647},
}
for _, vector := range testvectors {
less, distance := seqDistance(vector.top, vector.seq)
if less != vector.less {
t.Fatalf("top=%d > seq=%d is %v but should be %v", vector.top, vector.seq, less, vector.less)
}
if distance != vector.distance {
t.Fatalf("distance between top=%d and seq=%d is %d but should be %d", vector.top, vector.seq, distance, vector.distance)
}
}
}
func TestSequenceWindowNew(t *testing.T) {
testvectors := []struct {
size int
top uint32
head uint64
bodyLen int
valid bool
}{
{-1, 0, 0, 0, false},
{0, 0, 0, 0, true},
{1, 0, 0, 1, true},
{10, 0, 0, 1, true},
{10, 0x4, 0x40000000F, 1, true},
{10, 0x12, 0x120003FFFF, 1, true},
{32, 0, 0, 1, true},
{32, 0x1F, 0x1F7FFFFFFF, 1, true},
{32, 0x20, 0x2000000000, 1, true},
{33, 0, 0, 2, true},
{33, 1, 0x100000001, 2, true},
{63, 0, 0, 2, true},
{64, 0, 0, 2, true},
{65, 0, 0, 3, true},
{80, 0, 0, 3, true},
{80, 0xFFFF0000, 0xFFFF000000000000, 3, true},
{80, 0xFFFF0001, 0xFFFF000100000001, 3, true},
{80, 0xFFFF0002, 0xFFFF000200000003, 3, true},
{80, 0xFFFF0003, 0xFFFF000300000007, 3, true},
{80, 0xFFFF0004, 0xFFFF00040000000F, 3, true},
{80, 0xFFFF0005, 0xFFFF00050000001F, 3, true},
{80, 0xAAAA5555, 0xAAAA5555001FFFFF, 3, true},
{96, 0, 0, 3, true},
{97, 0, 0, 4, true},
}
for _, vector := range testvectors {
w, err := NewSequenceWindow(vector.size, vector.top)
if vector.valid {
if err != nil {
t.Fatal("unexpected error:", err)
}
if w.Size() != vector.size {
t.Fatalf("sequence-window has wrong size, is: %d, should be %d", w.Size(), vector.size)
}
if w.Top() != vector.top {
t.Fatalf("sequence-window(%d/%d) top value invalid, is: 0x%08X, should be 0x%08X", vector.size, vector.top, w.Top(), vector.top)
}
if w.head != vector.head {
t.Fatalf("sequence-window(%d/%d) head invalid, is: 0x%016X, should be 0x%016X", vector.size, vector.top, w.head, vector.head)
}
bodyLen := len(w.body)
if bodyLen != vector.bodyLen {
t.Fatalf("sequence-window(%d/%d) body length has invalid length, is: %d, should be %d", vector.size, vector.top, bodyLen, vector.bodyLen)
}
isEmpty := true
for _, v := range w.body {
if v != 0xFFFFFFFF {
isEmpty = false
}
}
if !isEmpty {
t.Fatalf("sequence-window(%d/%d) body not full, is: %v", vector.size, vector.top, w.body)
}
} else {
if err == nil {
t.Fatalf("creating sequence-window(%d/%d) should give an error", vector.size, vector.top)
}
}
}
}
func TestSequenceWindowCheck(t *testing.T) {
testvectors := []struct {
size int
top uint32
seq uint32
result bool
}{
{0, 0, 0, true},
{0, 0, ^uint32(0), true},
{0, 17, 12, true},
{10, 17, 12, false},
{10, 17, 17, true},
{10, 17, 18, true},
{10, 0, ^uint32(0), false},
{32, 0, 0, true},
{32, 0, 12, true},
{32, 13, 12, false},
{32, 100, 12, false},
{32, 33, 12, false},
{32, 33, 32, false},
{64, 36, 0, false},
{64, 36, 12, false},
{64, 36, ^uint32(0), false},
{64, 100, ^uint32(0), false},
{64, 100, 96, false},
{64, 100, 95, false},
{64, 100, 63, false},
{64, 100, 110, true},
}
for _, vector := range testvectors {
w, err := NewSequenceWindow(vector.size, vector.top)
if err != nil {
t.Fatal("unexpected error:", err)
}
result := w.Check(vector.seq)
if result != vector.result {
t.Fatalf("checking %d against %s returned %v but should be %v", vector.seq, w, result, vector.result)
}
}
}
func TestSequenceWindowCheckAndSet(t *testing.T) {
testvectors := []struct {
size int
top uint32
seqs []uint32
result bool
}{
{0, 0, []uint32{0, 1, 2, 3, 4}, true},
{0, 0, []uint32{^uint32(0)}, true},
{1, 0, []uint32{0, 1, 2, 3, 5}, true},
{10, 0, []uint32{^uint32(0)}, false},
{10, 20, []uint32{^uint32(0), 5, 9, 10, 12, 13}, false},
{10, 20, []uint32{20, 23, 31, 32, 35}, true},
{32, 0, []uint32{0, 1, 2, 3, 4}, true},
{32, 10, []uint32{0, 1, 2, 3, 4}, false},
{32, 10, []uint32{10, 11, 12, 13, 14}, true},
{32, 0, []uint32{10, 17, 23, 0, 1, 18, 9, 8, 31}, true},
{32, 30, []uint32{30, 31, 32, 33, 34}, true},
{32, 0, []uint32{95, 100, 96, 97, 99, 98}, true},
{50, 0, []uint32{31, 32, 35, 33, 34, 95}, true},
{30, ^uint32(0) - 10, []uint32{0, 1, 2, 3, ^uint32(0), ^uint32(0) - 2}, true},
}
for _, vector := range testvectors {
w, err := NewSequenceWindow(vector.size, vector.top)
if err != nil {
t.Fatal("unexpected error:", err)
}
t.Logf("--- %10d, %v", vector.top, w)
for _, seq := range vector.seqs {
result := w.CheckAndSet(seq)
if result != vector.result {
t.Fatalf("check-and-set %d on %s returned %v but should be %v", seq, w, result, vector.result)
}
t.Logf("chk %10d, %v", seq, w)
}
}
}
func BenchmarkSeqWindowCheck(b *testing.B) {
w, err := NewSequenceWindow(100, 0)
if err != nil {
b.Fatal("unexpected error:", err)
}
b.ResetTimer()
for seq := uint32(0); seq < uint32(b.N); seq++ {
w.Check(seq)
}
}
func BenchmarkSeqWindowCheckParallel(b *testing.B) {
w, err := NewSequenceWindow(100, 0)
if err != nil {
b.Fatal("unexpected error:", err)
}
wg := sync.WaitGroup{}
numThreads := runtime.NumCPU()
b.Logf("running test with %d threads", numThreads)
wg.Add(numThreads)
b.ResetTimer()
for i := 0; i < numThreads; i++ {
go func() {
for seq := uint32(0); seq < uint32(b.N); seq += uint32(numThreads) {
w.Check(seq)
}
wg.Done()
}()
}
wg.Wait()
}
func BenchmarkSeqWindowCheckAndSet(b *testing.B) {
w, err := NewSequenceWindow(100, 0)
if err != nil {
b.Fatal("unexpected error:", err)
}
b.ResetTimer()
for seq := uint32(0); seq < uint32(b.N); seq++ {
w.CheckAndSet(seq)
}
}
func BenchmarkSeqWindowCheckAndSetParallel(b *testing.B) {
w, err := NewSequenceWindow(100, 0)
if err != nil {
b.Fatal("unexpected error:", err)
}
wg := sync.WaitGroup{}
numThreads := runtime.NumCPU()
b.Logf("running test with %d threads", numThreads)
wg.Add(numThreads)
b.ResetTimer()
for i := 0; i < numThreads; i++ {
go func() {
for seq := uint32(0); seq < uint32(b.N); seq += uint32(numThreads) {
w.CheckAndSet(seq)
}
wg.Done()
}()
}
wg.Wait()
}
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