DNS Performance Numbers
rwatson at FreeBSD.org
Sat Nov 11 09:22:32 UTC 2006
On Mon, 30 Oct 2006, Marcelo Gardini do Amaral wrote:
> Dave, could you please describe you test set?
> I've posted some results months ago and they were kind different.
> I have done some tests   with bind and queryperf and my result on
> FreeBSD 6.1 was very poor if compared with 4.11.
> Besides this, I have had bad results with NSD + 6.1 too and it doesn't use
> threads. Because of that I realized that there is something strange with UDP
> traffic on 6.1, as it was discussed in the threads below.
FYI: In response to feedback from ISC, there are UDP transmit optimizations in
FreeBSD 7.x. These have a relatively minor performance impact for
single-threaded applications, but in the special case of BIND accessing a
single UDP socket from many different threads, it significantly improves
performance. I'll look at MFC'ing these to 6.x after 6.2-RELEASE (especially
if reminded in a month or so :-).
With regard to the possible bge issue -- I would encourage you to test using a
7.x kernel, ideally with all the debugging disabled, and see if there's been
any improvement (or regression). There has been a lot of change in these
areas, and it would be helpful to know what, if any, impact this has had.
Robert N M Watson
University of Cambridge
> Marcelo Gardini
> freebsd-performance at freebsd.org mailing list
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