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Date: Mon, 30 Oct 2000 11:13:58 +0100 (CET)
From: Ingo Molnar <mingo@elte.hu>
Reply-To: mingo@elte.hu
To: "Jeff V. Merkey" <jmerkey@vger.timpanogas.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.2.18Pre Lan Performance Rocks!
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On Mon, 30 Oct 2000, Jeff V. Merkey wrote:

> No argument here, but the overhead of reloading CR3 period will kill
> performance. [...]

2.4 does not reload CR3, unless you are using multiple user-space
processes.

> 2.4 does not beat NetWare, BTW, it gets a little further, but still
> hits the wall, [...]

as i told you in the previous mail, the main overhead is not CR3, it's the
copying & dirtying of all data, and the subsequent DMA-initiated dirty
cacheline writeback. I can serve 100 MB/sec web content with 2.4 & TUX
just fine - it relies on a zero-copying infrastructure.

	Ingo

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