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| author | Dimitri Staessens <dimitri.staessens@ugent.be> | 2019-02-08 10:47:42 +0100 |
|---|---|---|
| committer | Sander Vrijders <sander.vrijders@ugent.be> | 2019-02-08 12:39:23 +0100 |
| commit | e00c9b13acad23e14df9d5cf4c7868dfd6e1bc55 (patch) | |
| tree | 1447e0402a78b79edd03cd8f72bc6c236df81a4c /include | |
| parent | 5dd086aa679e3e05d20ef6a19f3fefbe46ffe40e (diff) | |
| download | ouroboros-e00c9b13acad23e14df9d5cf4c7868dfd6e1bc55.tar.gz ouroboros-e00c9b13acad23e14df9d5cf4c7868dfd6e1bc55.zip | |
lib: Add initial rtt estimator to FRCT
This adds a simple round-trip time estimator to FRCT. The estimate is
a weighted average with deviation. The retransmission is scheduled
after rtt + 2 times the deviation. A retransmit doubles the rtt
estimate to avoid the no-update case when rtt suddenly increases. The
rtt is estimated in microseconds and the granularity for retransmits
is 256 microseconds.
Signed-off-by: Dimitri Staessens <dimitri.staessens@ugent.be>
Signed-off-by: Sander Vrijders <sander.vrijders@ugent.be>
Diffstat (limited to 'include')
| -rw-r--r-- | include/ouroboros/utils.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ouroboros/utils.h b/include/ouroboros/utils.h index f5b6686f..d40a1783 100644 --- a/include/ouroboros/utils.h +++ b/include/ouroboros/utils.h @@ -28,6 +28,7 @@ #define MIN(a,b) (((a) < (b)) ? (a) : (b)) #define MAX(a,b) (((a) > (b)) ? (a) : (b)) +#define ABS(a) ((a) > 0 ? (a) : -(a)) typedef struct { uint8_t * data; |