Re: BIND 9.10 IPv6 performance
On 08/03/15 16:09, Carsten Strotmann wrote: Hi, I'm doing some performance tests on some modern Haswell CPU machines (20 cores) using Ubuntu Linux 14.04 (Kernel 3.13.0-46-generic) using BIND 9.10.1-P2 compiled with --with-tuning=large. With using 8 worker threads I get near 400K QPS via IPv4 UDP (from a hot cache without resolving), which is a good. CPU utilization as seen by top is near 800%, as expected (8 cores fully used). When I switch BIND 9 to listen on IPv6 only, the performance drops to less than 60K QPS. Just for testing, what happens if you remove the allow-recursion ACL? Wondering if the IPv6 ACLs are slower; they should be, IPv6 ACLs having to process more data, but it would be kind of surprising if that were having a measurable effect on query rates. ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
BIND 9.10 IPv6 performance
Hi,
I'm doing some performance tests on some modern Haswell CPU machines (20
cores) using Ubuntu Linux 14.04 (Kernel 3.13.0-46-generic) using BIND
9.10.1-P2 compiled with --with-tuning=large.
With using 8 worker threads I get near 400K QPS via IPv4 UDP (from a hot
cache without resolving), which is a good. CPU utilization as seen by
top is near 800%, as expected (8 cores fully used).
When I switch BIND 9 to listen on IPv6 only, the performance drops to
less than 60K QPS.
When I run the tests using Unbound (same machine, same OS, 8 threads), I
do not see a significant difference between the IPv4 and IPv6
performance, which should rule out an issue in the kernel or with the
DNS load generation.
Testing with 9.9.6-P2 shows a similar pattern.
The configuration is simple:
options {
directory /var/named;
listen-on { none; };
listen-on-v6 { any; };
recursive-clients 1;
tcp-clients 1000;
allow-recursion { 2001:db8::/48; };
};
zone . {
type hint;
file root.hint;
};
Has anyone seen such an performance drop on IPv6?
Carsten
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