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Faster timeouts, based on extracts of our logs.

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git-svn-id: file:///svn/unbound/trunk@689 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2007-10-17 17:40:35 +00:00
parent 75792c34dc
commit 482658b1cc
4 changed files with 7 additions and 4 deletions
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2
doc/Changelog
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@ -15,6 +15,8 @@
where no scripted answer was available. where no scripted answer was available.
- mark insecure RRs as insecure. - mark insecure RRs as insecure.
- fixup removal of nonsecure items from the additional. - fixup removal of nonsecure items from the additional.
- reduced timeout values to more realistic, 376 msec (262 msec has
90% of roundtrip times, 512 msec has 99% of roundtrip times.)
16 October 2007: Wouter 16 October 2007: Wouter
- no malloc in log_hex. - no malloc in log_hex.

2
iterator/iterator.h
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@ -58,7 +58,7 @@ struct iter_prep_list;
/** how nice is a server without further information, in msec /** how nice is a server without further information, in msec
* Equals rtt initial timeout value. * Equals rtt initial timeout value.
*/ */
#define UNKNOWN_SERVER_NICENESS 3000 #define UNKNOWN_SERVER_NICENESS 376
/** maximum timeout before a host is deemed unsuitable, in msec. /** maximum timeout before a host is deemed unsuitable, in msec.
* After host_ttl this will be timed out and the host will be tried again. * After host_ttl this will be timed out and the host will be tried again.
* Equals RTT_MAX_TIMEOUT * Equals RTT_MAX_TIMEOUT

5
util/rtt.c
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@ -60,9 +60,10 @@ void
rtt_init(struct rtt_info* rtt) rtt_init(struct rtt_info* rtt)
{ {
rtt->srtt = 0; rtt->srtt = 0;
rtt->rttvar = 750; rtt->rttvar = 94;
rtt->rto = calc_rto(rtt); rtt->rto = calc_rto(rtt);
/* first RTO is 0 + 4*0.75 = 3 seconds */ /* default value from the book is 0 + 4*0.75 = 3 seconds */
/* first RTO is 0 + 4*0.094 = 0.376 seconds */
} }
int int

2
util/rtt.h
View file

@ -56,7 +56,7 @@ struct rtt_info {
}; };
/** min retransmit timeout value, in milliseconds */ /** min retransmit timeout value, in milliseconds */
#define RTT_MIN_TIMEOUT 2000 #define RTT_MIN_TIMEOUT 50
/** max retransmit timeout value, in milliseconds */ /** max retransmit timeout value, in milliseconds */
#define RTT_MAX_TIMEOUT 120000 #define RTT_MAX_TIMEOUT 120000