does anyone have any idea why this is ~22 times slower than
libc/getaddrinfo()?
-------- Original Message --------
Subject: [Unbound-users] libunbound - expected performance of cached rr
Date: Mon, 23 Apr 2012 21:34:47 +0100
From: Paul Freeman <[email protected]>
To: <[email protected]>
Hi,
Having just carried out some crude benchmarking, I just thought I
would sound out the list here.
Version 1.4.16
linked libs: libevent 2.0.16-stable (it uses epoll), ldns 1.6.11,
OpenSSL 1.0.0h 12 Mar 2012
linked modules: validator iterator
configured for x86_64-pc-linux-gnu on Mon Apr 23 17:54:58 BST 2012 with
options: '--prefix=/usr' '--build=x86_64-pc-linux-gnu'
'--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man'
'--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc'
'--localstatedir=/var/lib' '--libdir=/usr/lib64'
'--with-pidfile=/var/run/unbound.pid' '--with-ldns=/usr'
'--with-libevent=/usr'
'--with-rootkey-file=/etc/dnssec/root-anchors.txt' '--disable-debug'
'--disable-gost' '--disable-static' '--with-pthreads'
'--without-pyunbound' '--without-pythonmodule' '--disable-rpath'
uname -a
Linux fire 3.3.0-gentoo #3 SMP Fri Mar 30 21:00:18 BST 2012 x86_64 AMD
Athlon(tm) 64 X2 Dual Core Processor 4200+ AuthenticAMD GNU/Linux
/etc/hosts contains a line of the form:
127.0.0.2 test.local
the following snippet yields ~850 queries/second
#define HC 10000
if( (retval=ub_ctx_hosts(ctx, "/etc/hosts")) != 0) {
printf("error reading hosts: %s. errno says: %s\n",
ub_strerror(retval), strerror(errno));
return 1;
}
gettimeofday(&start_time, NULL);
for (i=0; i<HC; i++){
retval = ub_resolve(ctx, "test.local", 1, 1, &result);
if(retval != 0) {
printf("resolve error: %s\n", ub_strerror(retval));
return 1;
}
if((i == HC-1) &&result->havedata)
printf("The address is %s\n", inet_ntoa(*(struct
in_addr*)result->data[0]));
ub_resolve_free(result);
}
gettimeofday(&end_time, NULL);
a similar loop using getaddrinfo() yields ~19,000 queries per second
I was expecting the ub_resolve() rate to be higher given that the data
is locally cached, unless I have missed something?
any advice graciously accepted, thanks.
regards
Paul
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