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Date: Mon, 18 Sep 2006 10:30:38 -0300
From: Marcelo Gardini do Amaral <marcelo@registro.br>
To: Mike Silbersack <silby@silby.com>
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Cc: freebsd-net@freebsd.org, "Andrey V. Elsukov" <bu7cher@yandex.ru>,
	Robert Watson <rwatson@FreeBSD.org>, freebsd-stable@freebsd.org
Subject: Re: DNS query performance
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Hello Mike,

> Although it sounds silly, could you try recompiling 6.1 and 7.0 with a 
> non-SMP kernel and see how they perform?  That would at least tell us if 
> it's a general performance problem in 6.x and 7.x, or if SMP is somehow 
> hurting performance in this case.

I have this numbers spread over my e-mails. Just putting they together:


OS			q/s
---			---

FreeBSD 6.1 SMP		14953

FreeBSD 6.1 UP     	15516

FreeBSD 7.x SMP    	15323

FreeBSD 7.x UP     	16200


FreeBSD 4.11 SMP   	34977

FreeBSD 4.11 UP    	33926


I think is a general problem in 6.x and 7.x. UP kernel is always a
little bit better, but I can't see big changes tweaking from SMP to
UP.

On the other hand, with the same hardware, 4.11 is twice better in
performance.

-- 
Att.,

Marcelo Gardini