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fix(perf): direct field access
Signed-off-by: MastahSenpai <26342994+ii64@users.noreply.github.com>
This commit is contained in:
MastahSenpai
parent
6fb11e879d
commit
5937800f05
GPG key ID:
E41C08AD390E7C49
4 changed files with 60 additions and 115 deletions
8
core.go
8
core.go
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@ -61,10 +61,10 @@ func (r *Ring) Fd() int {
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return r.fd
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}
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func (r *Ring) SQ() *SQRing {
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return &r.sq
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func (r *Ring) SQ() SQRing {
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return r.sq
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}
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func (r *Ring) CQ() *CQRing {
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return &r.cq
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func (r *Ring) CQ() CQRing {
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return r.cq
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}
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21
core_test.go
21
core_test.go
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@ -23,10 +23,11 @@ func TestCore(t *testing.T) {
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sq := ring.SQ()
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n := 5
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for i := 0; i < n; i++ {
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sqTail := *sq.Tail()
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sqIdx := sqTail & *sq.RingMask()
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sqTail := *sq.Tail
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sqIdx := sqTail & *sq.RingMask
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sqe := sq.Get(sqIdx)
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sqe := &sq.Event[sqIdx]
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sqe.Reset()
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m := mkdata(i)
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@ -37,8 +38,8 @@ func TestCore(t *testing.T) {
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sqe.SetOffset(0)
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sqe.SetAddr(&m[0])
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*sq.Array().Get(sqIdx) = *sq.Head() & *sq.RingMask()
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*sq.Tail()++
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*sq.Array.Get(sqIdx) = *sq.Head & *sq.RingMask
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*sq.Tail++
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done, err := ring.Enter(1, 1, IORING_ENTER_GETEVENTS, nil)
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assert.NoError(t, err, "ring enter")
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@ -47,13 +48,13 @@ func TestCore(t *testing.T) {
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// get cq
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cq := ring.CQ()
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for i := 0; i < int(*cq.Tail()); i++ {
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cqHead := *cq.Head()
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cqIdx := cqHead & *cq.RingMask()
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for i := 0; i < int(*cq.Tail); i++ {
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cqHead := *cq.Head
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cqIdx := cqHead & *cq.RingMask
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cqe := cq.Get(cqIdx)
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cqe := cq.Event[cqIdx]
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*cq.Head()++
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*cq.Head++
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t.Logf("CQE %+#v", cqe)
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}
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46
mem_util.go
46
mem_util.go
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@ -1,6 +1,8 @@
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package gouring
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import (
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"fmt"
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"reflect"
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"syscall"
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"unsafe"
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@ -68,15 +70,14 @@ func setup(r *Ring, entries uint, parmas *IOUringParams) (ringFd int, err error)
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r.sqRingPtr = sqRingPtr
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r.cqRingPtr = cqRingPtr
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//
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// SQ
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// address Go's ring with base+offset allocated
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sq.head = sqRingPtr + uintptr(p.SQOff.Head)
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sq.tail = sqRingPtr + uintptr(p.SQOff.Tail)
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sq.ringMask = sqRingPtr + uintptr(p.SQOff.RingMask)
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sq.ringEntries = sqRingPtr + uintptr(p.SQOff.RingEntries)
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sq.flags = sqRingPtr + uintptr(p.SQOff.Flags)
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sq.array = uint32Array(sqRingPtr + uintptr(p.SQOff.Array))
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sq.Head = (*uint32)(unsafe.Pointer(sqRingPtr + uintptr(p.SQOff.Head)))
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sq.Tail = (*uint32)(unsafe.Pointer(sqRingPtr + uintptr(p.SQOff.Tail)))
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sq.RingMask = (*uint32)(unsafe.Pointer(sqRingPtr + uintptr(p.SQOff.RingMask)))
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sq.RingEntries = (*uint32)(unsafe.Pointer(sqRingPtr + uintptr(p.SQOff.RingEntries)))
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sq.Flags = (*uint32)(unsafe.Pointer(sqRingPtr + uintptr(p.SQOff.Flags)))
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sq.Array = uint32Array(sqRingPtr + uintptr(p.SQOff.Array)) // non fixed array size, controlled by ring mask
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r.sqesPtr, err = mmap(0, uintptr(p.SQEntries*uint32(_sz_sqe)),
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syscall.PROT_READ|syscall.PROT_WRITE,
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syscall.MAP_SHARED|syscall.MAP_POPULATE,
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@ -85,15 +86,30 @@ func setup(r *Ring, entries uint, parmas *IOUringParams) (ringFd int, err error)
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err = errors.Wrap(err, "mmap sqes")
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return
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}
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sq.sqes = sqeArray(r.sqesPtr)
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//
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sq.Event = *(*[]SQEntry)(unsafe.Pointer(&reflect.SliceHeader{
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Data: r.sqesPtr,
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Len: int(p.SQEntries),
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Cap: int(p.SQEntries),
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}))
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cq.head = cqRingPtr + uintptr(p.CQOff.Head)
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cq.tail = cqRingPtr + uintptr(p.CQOff.Tail)
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cq.ringMask = cqRingPtr + uintptr(p.CQOff.RingMask)
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cq.ringEntries = cqRingPtr + uintptr(p.CQOff.RingEntries)
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cq.cqes = cqeArray(cqRingPtr + uintptr(p.CQOff.CQEs))
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fmt.Printf("insp %+#v %+#v\n", len(sq.Event), cap(sq.Event))
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// CQ
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cq.Head = (*uint32)(unsafe.Pointer(cqRingPtr + uintptr(p.CQOff.Head)))
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cq.Tail = (*uint32)(unsafe.Pointer(cqRingPtr + uintptr(p.CQOff.Tail)))
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cq.RingMask = (*uint32)(unsafe.Pointer(cqRingPtr + uintptr(p.CQOff.RingMask)))
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cq.RingEntries = (*uint32)(unsafe.Pointer(cqRingPtr + uintptr(p.CQOff.RingEntries)))
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cqesPtr := cqRingPtr + uintptr(p.CQOff.CQEs)
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cq.Event = *(*[]CQEntry)(unsafe.Pointer(&reflect.SliceHeader{
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Data: cqesPtr,
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Len: int(p.CQEntries),
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Cap: int(p.CQEntries),
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}))
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fmt.Printf("insp %+#v %+#v\n", len(cq.Event), cap(cq.Event))
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return
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}
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100
ring.go
100
ring.go
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@ -20,48 +20,20 @@ type Ring struct {
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//-- SQ
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type SQRing struct {
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head uintptr
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tail uintptr
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ringMask uintptr
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ringEntries uintptr
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flags uintptr
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array uint32Array
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sqes sqeArray
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}
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func (sq SQRing) Get(idx uint32) *SQEntry {
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if uintptr(idx) >= uintptr(*sq.RingEntries()) {
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return nil
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}
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return sq.sqes.Get(uintptr(idx))
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}
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func (sq SQRing) Head() *uint32 {
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return (*uint32)(unsafe.Pointer(sq.head))
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}
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func (sq SQRing) Tail() *uint32 {
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return (*uint32)(unsafe.Pointer(sq.tail))
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}
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func (sq SQRing) RingMask() *uint32 {
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return (*uint32)(unsafe.Pointer(sq.ringMask))
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}
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func (sq SQRing) RingEntries() *uint32 {
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return (*uint32)(unsafe.Pointer(sq.ringEntries))
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}
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func (sq SQRing) Flags() *uint32 {
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return (*uint32)(unsafe.Pointer(sq.flags))
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}
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func (sq SQRing) Array() uint32Array {
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return sq.array
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}
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func (sq SQRing) Event() sqeArray {
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return sq.sqes
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Head *uint32
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Tail *uint32
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RingMask *uint32
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RingEntries *uint32
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Flags *uint32
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Array uint32Array
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Event []SQEntry
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}
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func (sq SQRing) IsCQOverflow() bool {
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return atomic.LoadUint32(sq.Flags())&IORING_SQ_CQ_OVERFLOW > 0
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return atomic.LoadUint32(sq.Flags)&IORING_SQ_CQ_OVERFLOW > 0
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}
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func (sq SQRing) IsNeedWakeup() bool {
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return atomic.LoadUint32(sq.Flags())&IORING_SQ_NEED_WAKEUP > 0
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return atomic.LoadUint32(sq.Flags)&IORING_SQ_NEED_WAKEUP > 0
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}
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//
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@ -75,57 +47,13 @@ func (a uint32Array) Set(idx uint32, v uint32) {
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atomic.StoreUint32(a.Get(idx), v)
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}
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type sqeArray uintptr
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func (sa sqeArray) Get(idx uintptr) *SQEntry {
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return (*SQEntry)(unsafe.Pointer(uintptr(sa) + idx*_sz_sqe))
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}
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func (sa sqeArray) Set(idx uintptr, v SQEntry) {
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*sa.Get(idx) = v
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}
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//
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//-- CQ
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type CQRing struct {
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head uintptr
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tail uintptr
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ringMask uintptr
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ringEntries uintptr
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cqes cqeArray
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}
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func (cq CQRing) Get(idx uint32) *CQEntry {
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if uintptr(idx) >= uintptr(*cq.RingEntries()) { // avoid lookup overflow
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return nil
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}
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return cq.cqes.Get(uintptr(idx))
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}
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func (cq CQRing) Head() *uint32 {
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return (*uint32)(unsafe.Pointer(cq.head))
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}
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func (cq CQRing) Tail() *uint32 {
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return (*uint32)(unsafe.Pointer(cq.tail))
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}
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func (cq CQRing) RingMask() *uint32 {
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return (*uint32)(unsafe.Pointer(cq.ringMask))
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}
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func (cq CQRing) RingEntries() *uint32 {
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return (*uint32)(unsafe.Pointer(cq.ringEntries))
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}
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func (cq CQRing) Event() cqeArray {
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return cq.cqes
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}
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//
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type cqeArray uintptr
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func (ca cqeArray) Get(idx uintptr) *CQEntry {
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return (*CQEntry)(unsafe.Pointer(uintptr(ca) + idx*_sz_cqe))
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}
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func (ca cqeArray) Set(idx uintptr, v CQEntry) {
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*ca.Get(idx) = v
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Head *uint32
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Tail *uint32
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RingMask *uint32
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RingEntries *uint32
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Event []CQEntry
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}
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