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device: move Queue{In,Out}boundElement Mutex to container type

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Queue{In,Out}boundElement locking can contribute to significant
overhead via sync.Mutex.lockSlow() in some environments. These types
are passed throughout the device package as elements in a slice, so
move the per-element Mutex to a container around the slice.

Reviewed-by: Maisem Ali <maisem@tailscale.com>
Signed-off-by: Jordan Whited <jordan@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jordan Whited 2023-10-02 14:48:28 -07:00 committed by Jason A. Donenfeld
parent 8a015f7c76
commit 1ec454f253
6 changed files with 121 additions and 111 deletions
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32
device/channels.go
View File

@ -19,13 +19,13 @@ import (
// call wg.Done to remove the initial reference. // call wg.Done to remove the initial reference.
// When the refcount hits 0, the queue's channel is closed. // When the refcount hits 0, the queue's channel is closed.
type outboundQueue struct { type outboundQueue struct {
c chan *[]*QueueOutboundElement c chan *QueueOutboundElementsContainer
wg sync.WaitGroup wg sync.WaitGroup
} }
func newOutboundQueue() *outboundQueue { func newOutboundQueue() *outboundQueue {
q := &outboundQueue{ q := &outboundQueue{
c: make(chan *[]*QueueOutboundElement, QueueOutboundSize), c: make(chan *QueueOutboundElementsContainer, QueueOutboundSize),
} }
q.wg.Add(1) q.wg.Add(1)
go func() { go func() {
@ -37,13 +37,13 @@ func newOutboundQueue() *outboundQueue {
// A inboundQueue is similar to an outboundQueue; see those docs. // A inboundQueue is similar to an outboundQueue; see those docs.
type inboundQueue struct { type inboundQueue struct {
c chan *[]*QueueInboundElement c chan *QueueInboundElementsContainer
wg sync.WaitGroup wg sync.WaitGroup
} }
func newInboundQueue() *inboundQueue { func newInboundQueue() *inboundQueue {
q := &inboundQueue{ q := &inboundQueue{
c: make(chan *[]*QueueInboundElement, QueueInboundSize), c: make(chan *QueueInboundElementsContainer, QueueInboundSize),
} }
q.wg.Add(1) q.wg.Add(1)
go func() { go func() {
@ -72,7 +72,7 @@ func newHandshakeQueue() *handshakeQueue {
} }
type autodrainingInboundQueue struct { type autodrainingInboundQueue struct {
c chan *[]*QueueInboundElement c chan *QueueInboundElementsContainer
} }
// newAutodrainingInboundQueue returns a channel that will be drained when it gets GC'd. // newAutodrainingInboundQueue returns a channel that will be drained when it gets GC'd.
@ -81,7 +81,7 @@ type autodrainingInboundQueue struct {
// some other means, such as sending a sentinel nil values. // some other means, such as sending a sentinel nil values.
func newAutodrainingInboundQueue(device *Device) *autodrainingInboundQueue { func newAutodrainingInboundQueue(device *Device) *autodrainingInboundQueue {
q := &autodrainingInboundQueue{ q := &autodrainingInboundQueue{
c: make(chan *[]*QueueInboundElement, QueueInboundSize), c: make(chan *QueueInboundElementsContainer, QueueInboundSize),
} }
runtime.SetFinalizer(q, device.flushInboundQueue) runtime.SetFinalizer(q, device.flushInboundQueue)
return q return q
@ -90,13 +90,13 @@ func newAutodrainingInboundQueue(device *Device) *autodrainingInboundQueue {
func (device *Device) flushInboundQueue(q *autodrainingInboundQueue) { func (device *Device) flushInboundQueue(q *autodrainingInboundQueue) {
for { for {
select { select {
case elems := <-q.c: case elemsContainer := <-q.c:
for _, elem := range *elems { elemsContainer.Lock()
elem.Lock() for _, elem := range elemsContainer.elems {
device.PutMessageBuffer(elem.buffer) device.PutMessageBuffer(elem.buffer)
device.PutInboundElement(elem) device.PutInboundElement(elem)
} }
device.PutInboundElementsSlice(elems) device.PutInboundElementsContainer(elemsContainer)
default: default:
return return
} }
@ -104,7 +104,7 @@ func (device *Device) flushInboundQueue(q *autodrainingInboundQueue) {
} }
type autodrainingOutboundQueue struct { type autodrainingOutboundQueue struct {
c chan *[]*QueueOutboundElement c chan *QueueOutboundElementsContainer
} }
// newAutodrainingOutboundQueue returns a channel that will be drained when it gets GC'd. // newAutodrainingOutboundQueue returns a channel that will be drained when it gets GC'd.
@ -114,7 +114,7 @@ type autodrainingOutboundQueue struct {
// All sends to the channel must be best-effort, because there may be no receivers. // All sends to the channel must be best-effort, because there may be no receivers.
func newAutodrainingOutboundQueue(device *Device) *autodrainingOutboundQueue { func newAutodrainingOutboundQueue(device *Device) *autodrainingOutboundQueue {
q := &autodrainingOutboundQueue{ q := &autodrainingOutboundQueue{
c: make(chan *[]*QueueOutboundElement, QueueOutboundSize), c: make(chan *QueueOutboundElementsContainer, QueueOutboundSize),
} }
runtime.SetFinalizer(q, device.flushOutboundQueue) runtime.SetFinalizer(q, device.flushOutboundQueue)
return q return q
@ -123,13 +123,13 @@ func newAutodrainingOutboundQueue(device *Device) *autodrainingOutboundQueue {
func (device *Device) flushOutboundQueue(q *autodrainingOutboundQueue) { func (device *Device) flushOutboundQueue(q *autodrainingOutboundQueue) {
for { for {
select { select {
case elems := <-q.c: case elemsContainer := <-q.c:
for _, elem := range *elems { elemsContainer.Lock()
elem.Lock() for _, elem := range elemsContainer.elems {
device.PutMessageBuffer(elem.buffer) device.PutMessageBuffer(elem.buffer)
device.PutOutboundElement(elem) device.PutOutboundElement(elem)
} }
device.PutOutboundElementsSlice(elems) device.PutOutboundElementsContainer(elemsContainer)
default: default:
return return
} }

4
device/device.go
View File

@ -68,8 +68,8 @@ type Device struct {
cookieChecker CookieChecker cookieChecker CookieChecker
pool struct { pool struct {
outboundElementsSlice *WaitPool inboundElementsContainer *WaitPool
inboundElementsSlice *WaitPool outboundElementsContainer *WaitPool
messageBuffers *WaitPool messageBuffers *WaitPool
inboundElements *WaitPool inboundElements *WaitPool
outboundElements *WaitPool outboundElements *WaitPool

4
device/peer.go
View File

@ -45,7 +45,7 @@ type Peer struct {
} }
queue struct { queue struct {
staged chan *[]*QueueOutboundElement // staged packets before a handshake is available staged chan *QueueOutboundElementsContainer // staged packets before a handshake is available
outbound *autodrainingOutboundQueue // sequential ordering of udp transmission outbound *autodrainingOutboundQueue // sequential ordering of udp transmission
inbound *autodrainingInboundQueue // sequential ordering of tun writing inbound *autodrainingInboundQueue // sequential ordering of tun writing
} }
@ -81,7 +81,7 @@ func (device *Device) NewPeer(pk NoisePublicKey) (*Peer, error) {
peer.device = device peer.device = device
peer.queue.outbound = newAutodrainingOutboundQueue(device) peer.queue.outbound = newAutodrainingOutboundQueue(device)
peer.queue.inbound = newAutodrainingInboundQueue(device) peer.queue.inbound = newAutodrainingInboundQueue(device)
peer.queue.staged = make(chan *[]*QueueOutboundElement, QueueStagedSize) peer.queue.staged = make(chan *QueueOutboundElementsContainer, QueueStagedSize)
// map public key // map public key
_, ok := device.peers.keyMap[pk] _, ok := device.peers.keyMap[pk]

44
device/pools.go
View File

@ -46,13 +46,13 @@ func (p *WaitPool) Put(x any) {
} }
func (device *Device) PopulatePools() { func (device *Device) PopulatePools() {
device.pool.outboundElementsSlice = NewWaitPool(PreallocatedBuffersPerPool, func() any { device.pool.inboundElementsContainer = NewWaitPool(PreallocatedBuffersPerPool, func() any {
s := make([]*QueueOutboundElement, 0, device.BatchSize())
return &s
})
device.pool.inboundElementsSlice = NewWaitPool(PreallocatedBuffersPerPool, func() any {
s := make([]*QueueInboundElement, 0, device.BatchSize()) s := make([]*QueueInboundElement, 0, device.BatchSize())
return &s return &QueueInboundElementsContainer{elems: s}
})
device.pool.outboundElementsContainer = NewWaitPool(PreallocatedBuffersPerPool, func() any {
s := make([]*QueueOutboundElement, 0, device.BatchSize())
return &QueueOutboundElementsContainer{elems: s}
}) })
device.pool.messageBuffers = NewWaitPool(PreallocatedBuffersPerPool, func() any { device.pool.messageBuffers = NewWaitPool(PreallocatedBuffersPerPool, func() any {
return new([MaxMessageSize]byte) return new([MaxMessageSize]byte)
@ -65,28 +65,32 @@ func (device *Device) PopulatePools() {
}) })
} }
func (device *Device) GetOutboundElementsSlice() *[]*QueueOutboundElement { func (device *Device) GetInboundElementsContainer() *QueueInboundElementsContainer {
return device.pool.outboundElementsSlice.Get().(*[]*QueueOutboundElement) c := device.pool.inboundElementsContainer.Get().(*QueueInboundElementsContainer)
c.Mutex = sync.Mutex{}
return c
} }
func (device *Device) PutOutboundElementsSlice(s *[]*QueueOutboundElement) { func (device *Device) PutInboundElementsContainer(c *QueueInboundElementsContainer) {
for i := range *s { for i := range c.elems {
(*s)[i] = nil c.elems[i] = nil
} }
*s = (*s)[:0] c.elems = c.elems[:0]
device.pool.outboundElementsSlice.Put(s) device.pool.inboundElementsContainer.Put(c)
} }
func (device *Device) GetInboundElementsSlice() *[]*QueueInboundElement { func (device *Device) GetOutboundElementsContainer() *QueueOutboundElementsContainer {
return device.pool.inboundElementsSlice.Get().(*[]*QueueInboundElement) c := device.pool.outboundElementsContainer.Get().(*QueueOutboundElementsContainer)
c.Mutex = sync.Mutex{}
return c
} }
func (device *Device) PutInboundElementsSlice(s *[]*QueueInboundElement) { func (device *Device) PutOutboundElementsContainer(c *QueueOutboundElementsContainer) {
for i := range *s { for i := range c.elems {
(*s)[i] = nil c.elems[i] = nil
} }
*s = (*s)[:0] c.elems = c.elems[:0]
device.pool.inboundElementsSlice.Put(s) device.pool.outboundElementsContainer.Put(c)
} }
func (device *Device) GetMessageBuffer() *[MaxMessageSize]byte { func (device *Device) GetMessageBuffer() *[MaxMessageSize]byte {

43
device/receive.go
View File

@ -27,7 +27,6 @@ type QueueHandshakeElement struct {
} }
type QueueInboundElement struct { type QueueInboundElement struct {
sync.Mutex
buffer *[MaxMessageSize]byte buffer *[MaxMessageSize]byte
packet []byte packet []byte
counter uint64 counter uint64
@ -35,6 +34,11 @@ type QueueInboundElement struct {
endpoint conn.Endpoint endpoint conn.Endpoint
} }
type QueueInboundElementsContainer struct {
sync.Mutex
elems []*QueueInboundElement
}
// clearPointers clears elem fields that contain pointers. // clearPointers clears elem fields that contain pointers.
// This makes the garbage collector's life easier and // This makes the garbage collector's life easier and
// avoids accidentally keeping other objects around unnecessarily. // avoids accidentally keeping other objects around unnecessarily.
@ -87,7 +91,7 @@ func (device *Device) RoutineReceiveIncoming(maxBatchSize int, recv conn.Receive
count int count int
endpoints = make([]conn.Endpoint, maxBatchSize) endpoints = make([]conn.Endpoint, maxBatchSize)
deathSpiral int deathSpiral int
elemsByPeer = make(map[*Peer]*[]*QueueInboundElement, maxBatchSize) elemsByPeer = make(map[*Peer]*QueueInboundElementsContainer, maxBatchSize)
) )
for i := range bufsArrs { for i := range bufsArrs {
@ -170,15 +174,14 @@ func (device *Device) RoutineReceiveIncoming(maxBatchSize int, recv conn.Receive
elem.keypair = keypair elem.keypair = keypair
elem.endpoint = endpoints[i] elem.endpoint = endpoints[i]
elem.counter = 0 elem.counter = 0
elem.Mutex = sync.Mutex{}
elem.Lock()
elemsForPeer, ok := elemsByPeer[peer] elemsForPeer, ok := elemsByPeer[peer]
if !ok { if !ok {
elemsForPeer = device.GetInboundElementsSlice() elemsForPeer = device.GetInboundElementsContainer()
elemsForPeer.Lock()
elemsByPeer[peer] = elemsForPeer elemsByPeer[peer] = elemsForPeer
} }
*elemsForPeer = append(*elemsForPeer, elem) elemsForPeer.elems = append(elemsForPeer.elems, elem)
bufsArrs[i] = device.GetMessageBuffer() bufsArrs[i] = device.GetMessageBuffer()
bufs[i] = bufsArrs[i][:] bufs[i] = bufsArrs[i][:]
continue continue
@ -217,16 +220,16 @@ func (device *Device) RoutineReceiveIncoming(maxBatchSize int, recv conn.Receive
default: default:
} }
} }
for peer, elems := range elemsByPeer { for peer, elemsContainer := range elemsByPeer {
if peer.isRunning.Load() { if peer.isRunning.Load() {
peer.queue.inbound.c <- elems peer.queue.inbound.c <- elemsContainer
device.queue.decryption.c <- elems device.queue.decryption.c <- elemsContainer
} else { } else {
for _, elem := range *elems { for _, elem := range elemsContainer.elems {
device.PutMessageBuffer(elem.buffer) device.PutMessageBuffer(elem.buffer)
device.PutInboundElement(elem) device.PutInboundElement(elem)
} }
device.PutInboundElementsSlice(elems) device.PutInboundElementsContainer(elemsContainer)
} }
delete(elemsByPeer, peer) delete(elemsByPeer, peer)
} }
@ -239,8 +242,8 @@ func (device *Device) RoutineDecryption(id int) {
defer device.log.Verbosef("Routine: decryption worker %d - stopped", id) defer device.log.Verbosef("Routine: decryption worker %d - stopped", id)
device.log.Verbosef("Routine: decryption worker %d - started", id) device.log.Verbosef("Routine: decryption worker %d - started", id)
for elems := range device.queue.decryption.c { for elemsContainer := range device.queue.decryption.c {
for _, elem := range *elems { for _, elem := range elemsContainer.elems {
// split message into fields // split message into fields
counter := elem.packet[MessageTransportOffsetCounter:MessageTransportOffsetContent] counter := elem.packet[MessageTransportOffsetCounter:MessageTransportOffsetContent]
content := elem.packet[MessageTransportOffsetContent:] content := elem.packet[MessageTransportOffsetContent:]
@ -259,8 +262,8 @@ func (device *Device) RoutineDecryption(id int) {
if err != nil { if err != nil {
elem.packet = nil elem.packet = nil
} }
elem.Unlock()
} }
elemsContainer.Unlock()
} }
} }
@ -437,12 +440,12 @@ func (peer *Peer) RoutineSequentialReceiver(maxBatchSize int) {
bufs := make([][]byte, 0, maxBatchSize) bufs := make([][]byte, 0, maxBatchSize)
for elems := range peer.queue.inbound.c { for elemsContainer := range peer.queue.inbound.c {
if elems == nil { if elemsContainer == nil {
return return
} }
for _, elem := range *elems { elemsContainer.Lock()
elem.Lock() for _, elem := range elemsContainer.elems {
if elem.packet == nil { if elem.packet == nil {
// decryption failed // decryption failed
continue continue
@ -515,11 +518,11 @@ func (peer *Peer) RoutineSequentialReceiver(maxBatchSize int) {
device.log.Errorf("Failed to write packets to TUN device: %v", err) device.log.Errorf("Failed to write packets to TUN device: %v", err)
} }
} }
for _, elem := range *elems { for _, elem := range elemsContainer.elems {
device.PutMessageBuffer(elem.buffer) device.PutMessageBuffer(elem.buffer)
device.PutInboundElement(elem) device.PutInboundElement(elem)
} }
bufs = bufs[:0] bufs = bufs[:0]
device.PutInboundElementsSlice(elems) device.PutInboundElementsContainer(elemsContainer)
} }
} }

95
device/send.go
View File

@ -46,7 +46,6 @@ import (
*/ */
type QueueOutboundElement struct { type QueueOutboundElement struct {
sync.Mutex
buffer *[MaxMessageSize]byte // slice holding the packet data buffer *[MaxMessageSize]byte // slice holding the packet data
packet []byte // slice of "buffer" (always!) packet []byte // slice of "buffer" (always!)
nonce uint64 // nonce for encryption nonce uint64 // nonce for encryption
@ -54,10 +53,14 @@ type QueueOutboundElement struct {
peer *Peer // related peer peer *Peer // related peer
} }
type QueueOutboundElementsContainer struct {
sync.Mutex
elems []*QueueOutboundElement
}
func (device *Device) NewOutboundElement() *QueueOutboundElement { func (device *Device) NewOutboundElement() *QueueOutboundElement {
elem := device.GetOutboundElement() elem := device.GetOutboundElement()
elem.buffer = device.GetMessageBuffer() elem.buffer = device.GetMessageBuffer()
elem.Mutex = sync.Mutex{}
elem.nonce = 0 elem.nonce = 0
// keypair and peer were cleared (if necessary) by clearPointers. // keypair and peer were cleared (if necessary) by clearPointers.
return elem return elem
@ -79,15 +82,15 @@ func (elem *QueueOutboundElement) clearPointers() {
func (peer *Peer) SendKeepalive() { func (peer *Peer) SendKeepalive() {
if len(peer.queue.staged) == 0 && peer.isRunning.Load() { if len(peer.queue.staged) == 0 && peer.isRunning.Load() {
elem := peer.device.NewOutboundElement() elem := peer.device.NewOutboundElement()
elems := peer.device.GetOutboundElementsSlice() elemsContainer := peer.device.GetOutboundElementsContainer()
*elems = append(*elems, elem) elemsContainer.elems = append(elemsContainer.elems, elem)
select { select {
case peer.queue.staged <- elems: case peer.queue.staged <- elemsContainer:
peer.device.log.Verbosef("%v - Sending keepalive packet", peer) peer.device.log.Verbosef("%v - Sending keepalive packet", peer)
default: default:
peer.device.PutMessageBuffer(elem.buffer) peer.device.PutMessageBuffer(elem.buffer)
peer.device.PutOutboundElement(elem) peer.device.PutOutboundElement(elem)
peer.device.PutOutboundElementsSlice(elems) peer.device.PutOutboundElementsContainer(elemsContainer)
} }
} }
peer.SendStagedPackets() peer.SendStagedPackets()
@ -219,7 +222,7 @@ func (device *Device) RoutineReadFromTUN() {
readErr error readErr error
elems = make([]*QueueOutboundElement, batchSize) elems = make([]*QueueOutboundElement, batchSize)
bufs = make([][]byte, batchSize) bufs = make([][]byte, batchSize)
elemsByPeer = make(map[*Peer]*[]*QueueOutboundElement, batchSize) elemsByPeer = make(map[*Peer]*QueueOutboundElementsContainer, batchSize)
count = 0 count = 0
sizes = make([]int, batchSize) sizes = make([]int, batchSize)
offset = MessageTransportHeaderSize offset = MessageTransportHeaderSize
@ -276,10 +279,10 @@ func (device *Device) RoutineReadFromTUN() {
} }
elemsForPeer, ok := elemsByPeer[peer] elemsForPeer, ok := elemsByPeer[peer]
if !ok { if !ok {
elemsForPeer = device.GetOutboundElementsSlice() elemsForPeer = device.GetOutboundElementsContainer()
elemsByPeer[peer] = elemsForPeer elemsByPeer[peer] = elemsForPeer
} }
*elemsForPeer = append(*elemsForPeer, elem) elemsForPeer.elems = append(elemsForPeer.elems, elem)
elems[i] = device.NewOutboundElement() elems[i] = device.NewOutboundElement()
bufs[i] = elems[i].buffer[:] bufs[i] = elems[i].buffer[:]
} }
@ -289,11 +292,11 @@ func (device *Device) RoutineReadFromTUN() {
peer.StagePackets(elemsForPeer) peer.StagePackets(elemsForPeer)
peer.SendStagedPackets() peer.SendStagedPackets()
} else { } else {
for _, elem := range *elemsForPeer { for _, elem := range elemsForPeer.elems {
device.PutMessageBuffer(elem.buffer) device.PutMessageBuffer(elem.buffer)
device.PutOutboundElement(elem) device.PutOutboundElement(elem)
} }
device.PutOutboundElementsSlice(elemsForPeer) device.PutOutboundElementsContainer(elemsForPeer)
} }
delete(elemsByPeer, peer) delete(elemsByPeer, peer)
} }
@ -317,7 +320,7 @@ func (device *Device) RoutineReadFromTUN() {
} }
} }
func (peer *Peer) StagePackets(elems *[]*QueueOutboundElement) { func (peer *Peer) StagePackets(elems *QueueOutboundElementsContainer) {
for { for {
select { select {
case peer.queue.staged <- elems: case peer.queue.staged <- elems:
@ -326,11 +329,11 @@ func (peer *Peer) StagePackets(elems *[]*QueueOutboundElement) {
} }
select { select {
case tooOld := <-peer.queue.staged: case tooOld := <-peer.queue.staged:
for _, elem := range *tooOld { for _, elem := range tooOld.elems {
peer.device.PutMessageBuffer(elem.buffer) peer.device.PutMessageBuffer(elem.buffer)
peer.device.PutOutboundElement(elem) peer.device.PutOutboundElement(elem)
} }
peer.device.PutOutboundElementsSlice(tooOld) peer.device.PutOutboundElementsContainer(tooOld)
default: default:
} }
} }
@ -349,52 +352,52 @@ top:
} }
for { for {
var elemsOOO *[]*QueueOutboundElement var elemsContainerOOO *QueueOutboundElementsContainer
select { select {
case elems := <-peer.queue.staged: case elemsContainer := <-peer.queue.staged:
i := 0 i := 0
for _, elem := range *elems { for _, elem := range elemsContainer.elems {
elem.peer = peer elem.peer = peer
elem.nonce = keypair.sendNonce.Add(1) - 1 elem.nonce = keypair.sendNonce.Add(1) - 1
if elem.nonce >= RejectAfterMessages { if elem.nonce >= RejectAfterMessages {
keypair.sendNonce.Store(RejectAfterMessages) keypair.sendNonce.Store(RejectAfterMessages)
if elemsOOO == nil { if elemsContainerOOO == nil {
elemsOOO = peer.device.GetOutboundElementsSlice() elemsContainerOOO = peer.device.GetOutboundElementsContainer()
} }
*elemsOOO = append(*elemsOOO, elem) elemsContainerOOO.elems = append(elemsContainerOOO.elems, elem)
continue continue
} else { } else {
(*elems)[i] = elem elemsContainer.elems[i] = elem
i++ i++
} }
elem.keypair = keypair elem.keypair = keypair
elem.Lock()
} }
*elems = (*elems)[:i] elemsContainer.Lock()
elemsContainer.elems = elemsContainer.elems[:i]
if elemsOOO != nil { if elemsContainerOOO != nil {
peer.StagePackets(elemsOOO) // XXX: Out of order, but we can't front-load go chans peer.StagePackets(elemsContainerOOO) // XXX: Out of order, but we can't front-load go chans
} }
if len(*elems) == 0 { if len(elemsContainer.elems) == 0 {
peer.device.PutOutboundElementsSlice(elems) peer.device.PutOutboundElementsContainer(elemsContainer)
goto top goto top
} }
// add to parallel and sequential queue // add to parallel and sequential queue
if peer.isRunning.Load() { if peer.isRunning.Load() {
peer.queue.outbound.c <- elems peer.queue.outbound.c <- elemsContainer
peer.device.queue.encryption.c <- elems peer.device.queue.encryption.c <- elemsContainer
} else { } else {
for _, elem := range *elems { for _, elem := range elemsContainer.elems {
peer.device.PutMessageBuffer(elem.buffer) peer.device.PutMessageBuffer(elem.buffer)
peer.device.PutOutboundElement(elem) peer.device.PutOutboundElement(elem)
} }
peer.device.PutOutboundElementsSlice(elems) peer.device.PutOutboundElementsContainer(elemsContainer)
} }
if elemsOOO != nil { if elemsContainerOOO != nil {
goto top goto top
} }
default: default:
@ -406,12 +409,12 @@ top:
func (peer *Peer) FlushStagedPackets() { func (peer *Peer) FlushStagedPackets() {
for { for {
select { select {
case elems := <-peer.queue.staged: case elemsContainer := <-peer.queue.staged:
for _, elem := range *elems { for _, elem := range elemsContainer.elems {
peer.device.PutMessageBuffer(elem.buffer) peer.device.PutMessageBuffer(elem.buffer)
peer.device.PutOutboundElement(elem) peer.device.PutOutboundElement(elem)
} }
peer.device.PutOutboundElementsSlice(elems) peer.device.PutOutboundElementsContainer(elemsContainer)
default: default:
return return
} }
@ -445,8 +448,8 @@ func (device *Device) RoutineEncryption(id int) {
defer device.log.Verbosef("Routine: encryption worker %d - stopped", id) defer device.log.Verbosef("Routine: encryption worker %d - stopped", id)
device.log.Verbosef("Routine: encryption worker %d - started", id) device.log.Verbosef("Routine: encryption worker %d - started", id)
for elems := range device.queue.encryption.c { for elemsContainer := range device.queue.encryption.c {
for _, elem := range *elems { for _, elem := range elemsContainer.elems {
// populate header fields // populate header fields
header := elem.buffer[:MessageTransportHeaderSize] header := elem.buffer[:MessageTransportHeaderSize]
@ -471,8 +474,8 @@ func (device *Device) RoutineEncryption(id int) {
elem.packet, elem.packet,
nil, nil,
) )
elem.Unlock()
} }
elemsContainer.Unlock()
} }
} }
@ -486,9 +489,9 @@ func (peer *Peer) RoutineSequentialSender(maxBatchSize int) {
bufs := make([][]byte, 0, maxBatchSize) bufs := make([][]byte, 0, maxBatchSize)
for elems := range peer.queue.outbound.c { for elemsContainer := range peer.queue.outbound.c {
bufs = bufs[:0] bufs = bufs[:0]
if elems == nil { if elemsContainer == nil {
return return
} }
if !peer.isRunning.Load() { if !peer.isRunning.Load() {
@ -498,16 +501,16 @@ func (peer *Peer) RoutineSequentialSender(maxBatchSize int) {
// The timers and SendBuffers code are resilient to a few stragglers. // The timers and SendBuffers code are resilient to a few stragglers.
// TODO: rework peer shutdown order to ensure // TODO: rework peer shutdown order to ensure
// that we never accidentally keep timers alive longer than necessary. // that we never accidentally keep timers alive longer than necessary.
for _, elem := range *elems { elemsContainer.Lock()
elem.Lock() for _, elem := range elemsContainer.elems {
device.PutMessageBuffer(elem.buffer) device.PutMessageBuffer(elem.buffer)
device.PutOutboundElement(elem) device.PutOutboundElement(elem)
} }
continue continue
} }
dataSent := false dataSent := false
for _, elem := range *elems { elemsContainer.Lock()
elem.Lock() for _, elem := range elemsContainer.elems {
if len(elem.packet) != MessageKeepaliveSize { if len(elem.packet) != MessageKeepaliveSize {
dataSent = true dataSent = true
} }
@ -521,11 +524,11 @@ func (peer *Peer) RoutineSequentialSender(maxBatchSize int) {
if dataSent { if dataSent {
peer.timersDataSent() peer.timersDataSent()
} }
for _, elem := range *elems { for _, elem := range elemsContainer.elems {
device.PutMessageBuffer(elem.buffer) device.PutMessageBuffer(elem.buffer)
device.PutOutboundElement(elem) device.PutOutboundElement(elem)
} }
device.PutOutboundElementsSlice(elems) device.PutOutboundElementsContainer(elemsContainer)
if err != nil { if err != nil {
var errGSO conn.ErrUDPGSODisabled var errGSO conn.ErrUDPGSODisabled
if errors.As(err, &errGSO) { if errors.As(err, &errGSO) {