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Improved path selection, more efficient traffic allocation, lower QoS/ACK overhead

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This commit is contained in:
Joseph Henry 2018-06-22 16:30:20 -07:00
parent 52264d5e28
commit bdcdccfcc3
7 changed files with 143 additions and 91 deletions
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15
node/Constants.hpp
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@ -274,6 +274,19 @@
*/
#define ZT_MULTIPATH_BINDER_REFRESH_PERIOD 5000
/**
* Packets are only used for QoS/ACK statistical sampling if their packet ID is divisible by
* this integer. This is to provide a mechanism for both peers to agree on which packets need
* special treatment without having to exchange information. Changing this value would be
* a breaking change and would necessitate a protocol version upgrade. Since each incoming and
* outgoing packet ID is checked against this value its evaluation is of the form:
* (id & (divisor - 1)) == 0, thus the divisor must be a power of 2.
*
* This value is set at (16) so that given a normally-distributed RNG output we will sample
* 1/16th (or ~6.25%) of packets.
*/
#define ZT_PATH_QOS_ACK_PROTOCOL_DIVISOR 0x10
/**
* Time horizon for VERB_QOS_MEASUREMENT and VERB_ACK packet processing cutoff
*/
@ -384,7 +397,7 @@
/**
* Minimum amount of time between each ACK packet
*/
#define ZT_PATH_ACK_INTERVAL 250
#define ZT_PATH_ACK_INTERVAL 1000
/**
* How often an aggregate link statistics report is emitted into this tracing system