mirror of https://github.com/etcd-io/bbolt.git
283 lines
8.0 KiB
Go
283 lines
8.0 KiB
Go
package freelist
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import (
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"math/rand"
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"os"
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"reflect"
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"sort"
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"testing"
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"unsafe"
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"go.etcd.io/bbolt/internal/common"
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)
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// TestFreelistType is used as a env variable for test to indicate the backend type
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const TestFreelistType = "TEST_FREELIST_TYPE"
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// Ensure that a page is added to a transaction's freelist.
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func TestFreelist_free(t *testing.T) {
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f := newTestFreelist()
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f.Free(100, common.NewPage(12, 0, 0, 0))
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if !reflect.DeepEqual([]common.Pgid{12}, f.pendingPageIds()[100].ids) {
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t.Fatalf("exp=%v; got=%v", []common.Pgid{12}, f.pendingPageIds()[100].ids)
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}
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}
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// Ensure that a page and its overflow is added to a transaction's freelist.
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func TestFreelist_free_overflow(t *testing.T) {
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f := newTestFreelist()
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f.Free(100, common.NewPage(12, 0, 0, 3))
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if exp := []common.Pgid{12, 13, 14, 15}; !reflect.DeepEqual(exp, f.pendingPageIds()[100].ids) {
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t.Fatalf("exp=%v; got=%v", exp, f.pendingPageIds()[100].ids)
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}
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}
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// Ensure that a transaction's free pages can be released.
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func TestFreelist_release(t *testing.T) {
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f := newTestFreelist()
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f.Free(100, common.NewPage(12, 0, 0, 1))
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f.Free(100, common.NewPage(9, 0, 0, 0))
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f.Free(102, common.NewPage(39, 0, 0, 0))
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f.release(100)
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f.release(101)
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if exp := common.Pgids([]common.Pgid{9, 12, 13}); !reflect.DeepEqual(exp, f.freePageIds()) {
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t.Fatalf("exp=%v; got=%v", exp, f.freePageIds())
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}
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f.release(102)
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if exp := common.Pgids([]common.Pgid{9, 12, 13, 39}); !reflect.DeepEqual(exp, f.freePageIds()) {
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t.Fatalf("exp=%v; got=%v", exp, f.freePageIds())
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}
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}
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// Ensure that releaseRange handles boundary conditions correctly
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func TestFreelist_releaseRange(t *testing.T) {
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type testRange struct {
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begin, end common.Txid
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}
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type testPage struct {
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id common.Pgid
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n int
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allocTxn common.Txid
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freeTxn common.Txid
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}
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var releaseRangeTests = []struct {
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title string
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pagesIn []testPage
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releaseRanges []testRange
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wantFree []common.Pgid
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}{
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{
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title: "Single pending in range",
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pagesIn: []testPage{{id: 3, n: 1, allocTxn: 100, freeTxn: 200}},
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releaseRanges: []testRange{{1, 300}},
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wantFree: []common.Pgid{3},
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},
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{
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title: "Single pending with minimum end range",
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pagesIn: []testPage{{id: 3, n: 1, allocTxn: 100, freeTxn: 200}},
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releaseRanges: []testRange{{1, 200}},
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wantFree: []common.Pgid{3},
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},
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{
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title: "Single pending outsize minimum end range",
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pagesIn: []testPage{{id: 3, n: 1, allocTxn: 100, freeTxn: 200}},
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releaseRanges: []testRange{{1, 199}},
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wantFree: nil,
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},
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{
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title: "Single pending with minimum begin range",
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pagesIn: []testPage{{id: 3, n: 1, allocTxn: 100, freeTxn: 200}},
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releaseRanges: []testRange{{100, 300}},
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wantFree: []common.Pgid{3},
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},
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{
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title: "Single pending outside minimum begin range",
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pagesIn: []testPage{{id: 3, n: 1, allocTxn: 100, freeTxn: 200}},
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releaseRanges: []testRange{{101, 300}},
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wantFree: nil,
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},
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{
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title: "Single pending in minimum range",
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pagesIn: []testPage{{id: 3, n: 1, allocTxn: 199, freeTxn: 200}},
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releaseRanges: []testRange{{199, 200}},
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wantFree: []common.Pgid{3},
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},
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{
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title: "Single pending and read transaction at 199",
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pagesIn: []testPage{{id: 3, n: 1, allocTxn: 199, freeTxn: 200}},
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releaseRanges: []testRange{{100, 198}, {200, 300}},
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wantFree: nil,
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},
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{
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title: "Adjacent pending and read transactions at 199, 200",
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pagesIn: []testPage{
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{id: 3, n: 1, allocTxn: 199, freeTxn: 200},
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{id: 4, n: 1, allocTxn: 200, freeTxn: 201},
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},
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releaseRanges: []testRange{
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{100, 198},
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{200, 199}, // Simulate the ranges db.freePages might produce.
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{201, 300},
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},
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wantFree: nil,
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},
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{
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title: "Out of order ranges",
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pagesIn: []testPage{
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{id: 3, n: 1, allocTxn: 199, freeTxn: 200},
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{id: 4, n: 1, allocTxn: 200, freeTxn: 201},
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},
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releaseRanges: []testRange{
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{201, 199},
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{201, 200},
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{200, 200},
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},
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wantFree: nil,
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},
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{
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title: "Multiple pending, read transaction at 150",
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pagesIn: []testPage{
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{id: 3, n: 1, allocTxn: 100, freeTxn: 200},
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{id: 4, n: 1, allocTxn: 100, freeTxn: 125},
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{id: 5, n: 1, allocTxn: 125, freeTxn: 150},
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{id: 6, n: 1, allocTxn: 125, freeTxn: 175},
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{id: 7, n: 2, allocTxn: 150, freeTxn: 175},
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{id: 9, n: 2, allocTxn: 175, freeTxn: 200},
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},
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releaseRanges: []testRange{{50, 149}, {151, 300}},
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wantFree: []common.Pgid{4, 9, 10},
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},
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}
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for _, c := range releaseRangeTests {
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f := newTestFreelist()
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var ids []common.Pgid
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for _, p := range c.pagesIn {
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for i := uint64(0); i < uint64(p.n); i++ {
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ids = append(ids, common.Pgid(uint64(p.id)+i))
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}
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}
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f.Init(ids)
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for _, p := range c.pagesIn {
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f.Allocate(p.allocTxn, p.n)
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}
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for _, p := range c.pagesIn {
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f.Free(p.freeTxn, common.NewPage(p.id, 0, 0, uint32(p.n-1)))
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}
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for _, r := range c.releaseRanges {
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f.releaseRange(r.begin, r.end)
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}
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if exp := common.Pgids(c.wantFree); !reflect.DeepEqual(exp, f.freePageIds()) {
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t.Errorf("exp=%v; got=%v for %s", exp, f.freePageIds(), c.title)
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}
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}
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}
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// Ensure that a freelist can deserialize from a freelist page.
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func TestFreelist_read(t *testing.T) {
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// Create a page.
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var buf [4096]byte
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page := (*common.Page)(unsafe.Pointer(&buf[0]))
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page.SetFlags(common.FreelistPageFlag)
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page.SetCount(2)
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// Insert 2 page ids.
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ids := (*[3]common.Pgid)(unsafe.Pointer(uintptr(unsafe.Pointer(page)) + unsafe.Sizeof(*page)))
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ids[0] = 23
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ids[1] = 50
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// Deserialize page into a freelist.
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f := newTestFreelist()
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f.Read(page)
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// Ensure that there are two page ids in the freelist.
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if exp := common.Pgids([]common.Pgid{23, 50}); !reflect.DeepEqual(exp, f.freePageIds()) {
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t.Fatalf("exp=%v; got=%v", exp, f.freePageIds())
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}
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}
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// Ensure that a freelist can serialize into a freelist page.
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func TestFreelist_write(t *testing.T) {
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// Create a freelist and write it to a page.
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var buf [4096]byte
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f := newTestFreelist()
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f.Init([]common.Pgid{12, 39})
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f.pendingPageIds()[100] = &txPending{ids: []common.Pgid{28, 11}}
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f.pendingPageIds()[101] = &txPending{ids: []common.Pgid{3}}
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p := (*common.Page)(unsafe.Pointer(&buf[0]))
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f.Write(p)
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// Read the page back out.
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f2 := newTestFreelist()
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f2.Read(p)
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// Ensure that the freelist is correct.
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// All pages should be present and in reverse order.
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if exp := common.Pgids([]common.Pgid{3, 11, 12, 28, 39}); !reflect.DeepEqual(exp, f2.freePageIds()) {
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t.Fatalf("exp=%v; got=%v", exp, f2.freePageIds())
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}
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}
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func Benchmark_FreelistRelease10K(b *testing.B) { benchmark_FreelistRelease(b, 10000) }
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func Benchmark_FreelistRelease100K(b *testing.B) { benchmark_FreelistRelease(b, 100000) }
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func Benchmark_FreelistRelease1000K(b *testing.B) { benchmark_FreelistRelease(b, 1000000) }
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func Benchmark_FreelistRelease10000K(b *testing.B) { benchmark_FreelistRelease(b, 10000000) }
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func benchmark_FreelistRelease(b *testing.B, size int) {
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ids := randomPgids(size)
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pending := randomPgids(len(ids) / 400)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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txp := &txPending{ids: pending}
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f := newTestFreelist()
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f.pendingPageIds()[1] = txp
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f.Init(ids)
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f.release(1)
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}
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}
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func randomPgids(n int) []common.Pgid {
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pgids := make(common.Pgids, n)
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for i := range pgids {
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pgids[i] = common.Pgid(rand.Int63())
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}
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sort.Sort(pgids)
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return pgids
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}
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func Test_freelist_ReadIDs_and_getFreePageIDs(t *testing.T) {
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f := newTestFreelist()
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exp := common.Pgids([]common.Pgid{3, 4, 5, 6, 7, 9, 12, 13, 18})
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f.Init(exp)
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if got := f.freePageIds(); !reflect.DeepEqual(exp, got) {
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t.Fatalf("exp=%v; got=%v", exp, got)
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}
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f2 := newTestFreelist()
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var exp2 []common.Pgid
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f2.Init(exp2)
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if got2 := f2.freePageIds(); !reflect.DeepEqual(got2, common.Pgids(exp2)) {
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t.Fatalf("exp2=%#v; got2=%#v", exp2, got2)
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}
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}
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// newTestFreelist get the freelist type from env and initial the freelist
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func newTestFreelist() Interface {
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if env := os.Getenv(TestFreelistType); env == "hashmap" {
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return NewHashMapFreelist()
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}
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return NewArrayFreelist()
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}
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