ExternalVendorCode/ZeroTierOne
1
0
Fork 0
mirror of https://github.com/zerotier/ZeroTierOne.git synced 2025-01-29 15:43:52 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Performance improvement to RX queue ring buffer.

Browse Source
This commit is contained in:
Adam Ierymenko 2017-08-23 15:19:26 -07:00
parent a156a4dbe2
commit b1d94c9f93
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
node/Switch.hpp
View File

@ -174,19 +174,20 @@ private:
// Returns matching or next available RX queue entry
inline RXQueueEntry *_findRXQueueEntry(uint64_t packetId)
{
unsigned int ptr = static_cast<unsigned int>(_rxQueuePtr.load());
for(unsigned int k=0;k<ZT_RX_QUEUE_SIZE;++k) {
RXQueueEntry *rq = &(_rxQueue[--ptr % ZT_RX_QUEUE_SIZE]);
const unsigned int current = static_cast<unsigned int>(_rxQueuePtr.load());
for(unsigned int k=1;k<=ZT_RX_QUEUE_SIZE;++k) {
RXQueueEntry *rq = &(_rxQueue[(current - k) % ZT_RX_QUEUE_SIZE]);
if ((rq->packetId == packetId)&&(rq->timestamp))
return rq;
}
return &(_rxQueue[static_cast<unsigned int>(++_rxQueuePtr) % ZT_RX_QUEUE_SIZE]);
++_rxQueuePtr;
return &(_rxQueue[static_cast<unsigned int>(current) % ZT_RX_QUEUE_SIZE]);
}
// Returns next RX queue entry in ring buffer and increments ring counter
// Returns current entry in rx queue ring buffer and increments ring pointer
inline RXQueueEntry *_nextRXQueueEntry()
{
return &(_rxQueue[static_cast<unsigned int>(++_rxQueuePtr) % ZT_RX_QUEUE_SIZE]);
return &(_rxQueue[static_cast<unsigned int>((++_rxQueuePtr) - 1) % ZT_RX_QUEUE_SIZE]);
}
// ZeroTier-layer TX queue entry