linux-kernel - Re: [PATCH] Re: Bad network performance over 2Gbps

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Message-ID: <480CF2C0.9050208@hp.com>
Date:	Mon, 21 Apr 2008 13:02:08 -0700
From:	Rick Jones <rick.jones2@...com>
To:	Bodo Eggert <7eggert@....de>
CC:	Kok@...r.kernel.org, Auke <auke-jan.h.kok@...el.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Anton Titov <a.titov@...t.bg>, Chris Snook <csnook@...hat.com>,
	"H. Willstrand" <h.willstrand@...il.com>, netdev@...r.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Re: Bad network performance over 2Gbps

Bodo Eggert wrote:
> On Mon, 21 Apr 2008, Rick Jones wrote:
>>Be it kernel or user space, for consistent benchmark results it needs to be
>>able to be turned-off without turning the code.  That leaves me in agreement
>>with Stephen that if it must exist, the user space one would be preferable.
>>It can be easily terminated with extreme prejudice.
> 
> 
> I agree that having a full-featured userspace balancer daemon with lots of 
> intelligence will be theoretically better, but if you can have a simple
> daemon doing OK on many machines for less than the userspace daemon's
> kernel stack, why not?

Perhaps my judgement is too colored by benchmark(et)ing, and desires to 
have repeatable results on things like neperf, but I very much like to 
know where my interrupts are going and don't like them moving around. 
That is why I am not particularly fond of either flavor of irq balancing.

That being the case, whatever is out there aught to be able to be 
disabled on a running system without having to roll bits or reboot.

rick jones
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