Maintained by: NLnet Labs

[Unbound-users] Packets lost when multi threading

Leo Baltus
Fri Dec 7 11:29:10 CET 2012


Hi,

When I run unbound multi-threaded perf keeps reporting 'Packets lost',
but when it runs single threaded it does not.

$ perf -d 10 -a 'www.omroep.nl IN A' 2a02:458:101:31::34
qps: 29262.9
qps: 31986.4
qps: 32167.5
qps: 32479.7
qps: 33064.3
qps: 32174.4
qps: 31408.1
qps: 35887.4
qps: 37471.3
qps: 35364.5
overall time: 	10.0001 sec
Packets lost: 	732
0(NOERROR): 	331249 replies
average qps: 	33124.5

This is unbound-1.4.18 with openssl-1.0.0j, ldns-1.6.16 and 
libevent-2.0.21-stable running on a linux-2.6.27.59 kernel.

It even reports this when perf is run on the host running unbound.

Is this a known issue?

-- 
Leo Baltus, internetbeheerder                         /\
NPO ICT Internet Services                            /NPO/\
Sumatralaan 45, 1217 GP Hilversum, Filmcentrum, west \  /\/
servicedesk at omroep.nl, 035-6773555                    \/