On 3/22/07, Gerrit Renker <gerrit@xxxxxxxxxxxxxx> wrote:
[CCID 3]: Honour initial RTT estimate
This is a small optimisation which improves the accuracy of TX
RTT sampling when an initial RTT sample (e.g. from the intial
Request/Response exchange) is available.
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
---
net/dccp/ccids/ccid3.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -469,28 +469,29 @@ static void ccid3_hc_tx_packet_recv(stru
else /* can not exceed 100% */
hctx->ccid3hctx_p = 1000000 / pinv;
- skb_get_timestamp(skb, &now);
-
/*
* Calculate new round trip sample as per [RFC 3448, 4.3] by
* R_sample = (now - t_recvdata) - t_elapsed
*/
+ skb_get_timestamp(skb, &now);
I can see how that optimises - shifting after the comment ;-)
Acked-by: Ian McDonald <ian.mcdonald@xxxxxxxxxxx>
--
Web: http://wand.net.nz/~iam4
Blog: http://iansblog.jandi.co.nz
WAND Network Research Group
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