On 2015-04-06 22:44, Robert Edmonds wrote:
Rogerio Bastos wrote:
I'm trying to test unbound witk dnstap. It works fine with low load,
but
exists with segfault at high load. The segfault only happens when
dnstap is
enabled in configuration.
I am using the debian package (version 1.5.3) avaible in [1] and
recompiled
with dnstap enabled.
I'm following instruction descripted in [2] and using fstrm version
0.2.0.
To test the server, I'm using dnsblast [3] with the follow command:
./dnsblast <server address> 50000 500
Hi, Rogerio:
Sorry to hear that. I would be happy to help debug dnstap (I wrote the
dnstap patchset for Unbound). Can I get some information about your
environment?
Can you show the "dnstap:" block of settings from your config, and the
"num-threads" server setting?
I'm using optimisation settings based on [1] (the Debian version is
compiled with libevent):
server:
num-threads: 2
msg-cache-slabs: 2
rrset-cache-slabs: 2
infra-cache-slabs: 2
key-cache-slabs: 2
rrset-cache-size: 100m
msg-cache-size: 50m
outgoing-range: 8192
num-queries-per-thread: 4096
so-rcvbuf: 4m
so-sndbuf: 4m
I'm using the example from dnstap's site [2]:
dnstap:
dnstap-enable: yes
dnstap-socket-path: "/var/run/unbound/dnstap.sock"
dnstap-send-identity: yes
dnstap-send-version: yes
dnstap-log-resolver-response-messages: yes
dnstap-log-client-query-messages: yes
Does fstrm's "make check" test suite succeed?
Yes, all tests is ok.
What version of protobuf-c are you using? (Did you compile from
source,
or did you use a packaged version?)
The packaged version from Debian Jessie (version 1.0.2).
What OS version are you using? (Based on your mention of the Debian
package from experimental, I would guess Debian or Ubuntu.)
Debian Jessie, the next-stable version.
Are you using a uniprocessor or SMP machine? Also, since there are
some
architecture-specific parts in fstrm, what architecture are you using?
I'm using a amd64 virtual machine with a two core CPU.
[1] https://www.unbound.net/documentation/howto_optimise.html
[2] http://dnstap.info/Examples/
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