Date: Thu, 16 Nov 2006 14:40:54 -0200 From: Marcelo Gardini do Amaral <marcelo@registro.br> To: Robert Watson <rwatson@FreeBSD.org> Cc: freebsd-performance@freebsd.org, kreios@gmail.com Subject: Re: DNS Performance Numbers Message-ID: <20061116164053.GR57732@registro.br> In-Reply-To: <20061111091844.I63959@fledge.watson.org> References: <20061030192702.GG76994@registro.br> <20061111091844.I63959@fledge.watson.org>
next in thread | previous in thread | raw e-mail | index | archive | help
> 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.
I made some tests using 7.x with all the debugging disabled:
queries / s
Int bind (d_t) bind (e_t) nsd (1_s) nsd (2_s)
--- ---------- ---------- --------- ---------
bge 15439 14733 12910 10946
em 37655 34092 42411 41974
d_t: disable threads
e_t: enable threads (libpthread)
1_s: 1 server forked
2_s: 2 server forked
Bind: 9.2.3
NSD: 3.0.2
em: Dell 1950, Intel NIC, SMP kernel
bge: HP Blade BL35p, Broadcom NIC, SMP kernel
Client: Dell 1750, Intel NIC, FreeBSD 4.11 UP, running queryperf
The results are very good for em NIC, better than my numbers [1] with
FreeBSD 6.1 some months ago. So I guess that we had an improvement :-)
But I got the same poor performance with the bge interface. The
problem remains.
[1] http://lists.freebsd.org/pipermail/freebsd-net/2006-September/011767.html
Cheers,
Marcelo
--
Att.,
Marcelo Gardini
NIC .br
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20061116164053.GR57732>