From: "Jeff V. Merkey" <jmerkey@timpanogas.org>
To: Daniel Phillips <phillips@innominate.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.2.18Pre Lan Performance Rocks!
Date: Wed, 01 Nov 2000 14:32:27 -0700 [thread overview]
Message-ID: <3A008BEB.D33EE394@timpanogas.org> (raw)
In-Reply-To: <39FF3D53.C46EB1A8@timpanogas.org> <20001031140534.A22819@work.bitmover.com> <39FF4488.83B6C1CE@timpanogas.org> <20001031142733.A23516@work.bitmover.com> <39FF49C8.475C2EA7@timpanogas.org> <20001101023010.G13422@athlon.random> <20001031183809.C9733@.timpanogas.org> <20001101164106.F9774@athlon.random> <3A005217.88D2CA0D@timpanogas.org> <3A005476.17F0F253@timpanogas.org> <20001101190732.A19767@athlon.random> <3A00621F.7CC77F5A@timpanogas.org> <news2mail-3A008792.BAA8F70D@innominate.de>
Daniel Phillips wrote:
>
> "Jeff V. Merkey" wrote:
> >
> > Andrea Arcangeli wrote:
> > >
> > > Speaking only for myself: on the technical side I don't think you can't be much
> > > faster than moving the performance critical services into the kernel and by
> > > skipping the copies (infact I also think that for fileserving skipping the
> > > copies and making sendfile to work and to work in zero copy will be enough).
> > > So I don't think losing robusteness this way can be explained in any technical
> > > way and no, it's not by showing me money that you'll convince me that's a good
> > > idea.
> >
> > This would help, but not as much as full ring 0.
>
> My experience is that I can get pretty much the same performance in ring
> 3 as ring 0 as long as I don't reload segment registers or take CR3. Is
> this right, or am I missing some fundamental kind of ring 3 overhead?
>
> Even in ring 0, you can mostly protect processes from each other using
> segments: if you don't reload the segments you can restrict damage to
> your own segment. It's not 100% safety but it is an enormous
> improvement over running in the same address space as the OS kernel. I
> don't have any problem at all with the idea of running a lot of parallel
> tasks in the same address space: the safety of this comes down to the
> compiler you use to compile the processes. If the compiler doesn't have
> ops that let processes damage each other then you won't get damage,
> assuming no bugs in your underlying implementation.
>
> BTW, let me add my 'me too': go for it, there is obviously a pot of gold
> there, just don't let Sauron^H^H^H^H^H^H Bill get to it first.
Amen to that one. BTW. The package we mailed out to you from Brian
went yesterday. Let me know when it arrives. I sent it to the address
in Berlin you provided.
:-)
Jeff
>
> --
> Daniel
> -
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next prev parent reply other threads:[~2000-11-01 21:36 UTC|newest]
Thread overview: 152+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-31 21:44 2.2.18Pre Lan Performance Rocks! Jeff V. Merkey
2000-10-31 21:36 ` Paul Menage
2000-10-31 21:44 ` David S. Miller
2000-10-31 23:21 ` Matti Aarnio
2000-10-31 23:39 ` David Weinehall
2000-10-31 22:05 ` Larry McVoy
2000-10-31 22:15 ` Jeff V. Merkey
2000-10-31 22:27 ` Larry McVoy
2000-10-31 22:38 ` Jeff V. Merkey
2000-10-31 22:48 ` Rik van Riel
2000-10-31 22:50 ` Jeff V. Merkey
2000-10-31 22:49 ` Larry McVoy
2000-10-31 22:53 ` Jeff V. Merkey
2000-10-31 23:15 ` Nathan Paul Simons
2000-10-31 23:20 ` Jeff V. Merkey
2000-11-01 0:00 ` Michael H. Warfield
2000-11-01 0:07 ` Alan Cox
2000-11-01 0:13 ` Michael H. Warfield
2000-11-01 1:30 ` Andrea Arcangeli
[not found] ` <20001031183809.C9733@.timpanogas.org>
2000-11-01 15:41 ` Andrea Arcangeli
2000-11-01 17:25 ` Jeff V. Merkey
2000-11-01 17:35 ` Jeff V. Merkey
2000-11-01 18:07 ` Andrea Arcangeli
2000-11-01 18:34 ` Jeff V. Merkey
2000-11-01 21:13 ` Daniel Phillips
2000-11-01 21:32 ` Jeff V. Merkey [this message]
2000-11-01 11:13 ` David Woodhouse
2000-11-01 15:00 ` Andrea Arcangeli
2000-11-01 9:51 ` Anton Altaparmakov
2000-11-01 17:28 ` Jeff V. Merkey
2000-11-02 21:58 ` Anton Altaparmakov
[not found] <200010300823.BAA19834@vger.timpanogas.org>
2000-10-30 8:36 ` Jeff V. Merkey
-- strict thread matches above, loose matches on Subject: below --
2000-10-29 23:19 Jeff V. Merkey
[not found] ` <E13q2R7-0006S7-00@the-village.bc.nu>
2000-10-30 1:35 ` Jeff V. Merkey
2000-10-30 6:47 ` Andi Kleen
2000-10-30 6:58 ` Jeff V. Merkey
2000-10-30 7:08 ` Andi Kleen
2000-10-30 7:16 ` Jeff V. Merkey
2000-10-30 7:38 ` Andi Kleen
2000-10-30 8:04 ` Jeff V. Merkey
2000-10-30 8:16 ` Andi Kleen
2000-10-30 12:47 ` Alan Cox
2000-10-30 12:50 ` Andi Kleen
2000-10-30 8:26 ` Ingo Molnar
2000-10-30 7:20 ` Jeff V. Merkey
2000-10-30 8:39 ` Ingo Molnar
2000-10-30 8:08 ` Jeff V. Merkey
2000-10-30 9:52 ` Ingo Molnar
2000-10-30 8:55 ` Jeff V. Merkey
2000-10-30 10:13 ` Ingo Molnar
2000-10-30 9:11 ` Jeff V. Merkey
2000-10-30 10:41 ` Ingo Molnar
2000-10-30 9:33 ` Jeff V. Merkey
2000-10-30 10:56 ` Ingo Molnar
2000-10-30 9:45 ` Jeff V. Merkey
2000-10-30 11:04 ` Ingo Molnar
2000-10-30 9:56 ` Jeff V. Merkey
2000-10-30 11:13 ` Ingo Molnar
2000-10-30 10:08 ` Jeff V. Merkey
2000-10-30 17:41 ` Andrea Arcangeli
2000-10-30 17:58 ` Chris Evans
2000-10-30 18:01 ` Jeff V. Merkey
2000-10-30 18:21 ` Andrea Arcangeli
2000-10-30 17:59 ` Jeff V. Merkey
2000-10-31 8:08 ` Ingo Molnar
2000-10-31 20:04 ` Jeff V. Merkey
2000-10-30 19:11 ` Dan Hollis
2000-10-31 18:59 ` Pavel Machek
2000-10-30 10:27 ` Ingo Molnar
2000-10-30 9:20 ` Jeff V. Merkey
2000-10-30 10:44 ` Ingo Molnar
2000-10-30 9:38 ` Jeff V. Merkey
2000-10-30 11:01 ` Ingo Molnar
2000-10-30 9:54 ` Jeff V. Merkey
2000-10-30 11:12 ` Ingo Molnar
2000-10-30 10:06 ` Jeff V. Merkey
2000-10-30 10:56 ` john slee
2000-10-30 18:04 ` Jeff V. Merkey
2000-10-30 11:31 ` Ingo Molnar
2000-10-30 12:57 ` Alan Cox
2000-10-30 17:55 ` Jeff V. Merkey
2000-10-30 18:34 ` Alan Cox
2000-10-30 21:17 ` Jeff V. Merkey
2000-10-31 9:25 ` Erik Andersen
2000-10-31 18:50 ` Pavel Machek
2000-10-31 20:06 ` Jeff V. Merkey
2000-10-31 20:13 ` Jeff V. Merkey
2000-10-31 21:31 ` Ingo Molnar
2000-10-31 21:56 ` Ingo Molnar
2000-10-31 21:57 ` Jeff V. Merkey
2000-11-01 0:27 ` Ingo Molnar
2000-10-31 23:18 ` Jeff V. Merkey
2000-11-01 0:47 ` Ingo Molnar
2000-11-01 0:56 ` Davide Libenzi
[not found] ` <20001102031546.B10806@cerebro.laendle>
[not found] ` <20001101212835.A2425@vger.timpanogas.org>
[not found] ` <20001102043332.A27126@fuji.laendle>
[not found] ` <3A0195DA.DDEBAC51@timpanogas.org>
[not found] ` <20001102194323.D2790@cerebro.laendle>
[not found] ` <3A01CBB5.48C3094A@timpanogas.org>
[not found] ` <20001102214903.F2790@cerebro.laendle>
[not found] ` <3A01E71A.778BD898@timpanogas.org>
[not found] ` <20001102232210.H2790@cerebro.laendle>
[not found] ` <3A01ECD2.76DE10FF@timpanogas.org>
2000-11-02 22:46 ` Jeff V. Merkey
2000-11-03 0:12 ` Davide Libenzi
2000-11-02 23:00 ` Jeff V. Merkey
2000-10-31 21:34 ` Ingo Molnar
2000-10-31 21:52 ` Jeff V. Merkey
2000-10-31 22:05 ` Andi Kleen
2000-10-31 22:23 ` Jeff V. Merkey
2000-10-31 22:45 ` Jeff V. Merkey
2000-10-31 22:44 ` David Lang
2000-10-31 22:57 ` Jeff V. Merkey
2000-10-31 22:52 ` David Lang
2000-10-31 23:02 ` Alan Cox
2000-10-31 23:03 ` Jeff V. Merkey
2000-11-01 0:08 ` Ingo Molnar
2000-10-31 22:59 ` Jeff V. Merkey
2000-11-01 2:30 ` Horst von Brand
2000-10-31 23:05 ` Richard B. Johnson
2000-10-31 23:14 ` Jeff V. Merkey
2000-11-01 0:32 ` Ingo Molnar
2000-10-31 23:23 ` Jeff V. Merkey
2000-11-01 0:55 ` Ingo Molnar
2000-10-31 23:54 ` Ingo Molnar
2000-10-31 22:47 ` Jeff V. Merkey
2000-10-31 22:56 ` Larry McVoy
2000-10-31 22:55 ` Jeff V. Merkey
2000-11-01 0:10 ` Ingo Molnar
2000-11-01 5:38 ` Daniel Phillips
2000-11-03 6:42 ` Daniel Phillips
2000-10-31 22:59 ` Michael H. Warfield
2000-10-31 23:12 ` Ingo Molnar
2000-10-31 22:28 ` Jeff V. Merkey
2000-11-01 5:01 ` Peter Samuelson
2000-11-01 5:09 ` Larry McVoy
2000-11-01 5:20 ` Peter Samuelson
2000-10-30 10:50 ` Ingo Molnar
2000-10-30 9:40 ` Jeff V. Merkey
2000-10-30 23:26 ` David Woodhouse
2000-10-30 23:49 ` Jeff V. Merkey
2000-10-31 23:34 ` Roger Larsson
2000-10-31 15:18 ` Reto Baettig
2000-10-31 20:26 ` Alan Cox
2000-10-31 15:30 ` Reto Baettig
2000-10-31 20:37 ` Alan Cox
2000-10-31 20:48 ` Jesse Pollard
2000-10-31 20:58 ` Alan Cox
2000-11-01 1:33 ` Horst von Brand
2000-11-01 3:42 ` Jesse Pollard
2000-11-01 13:26 ` Horst von Brand
2000-10-31 21:43 ` Jeff V. Merkey
2000-10-31 21:50 ` Jeff V. Merkey
2000-10-31 20:36 ` Rik van Riel
2000-10-31 15:47 ` Reto Baettig
2000-10-31 21:05 ` Rik van Riel
2000-10-31 21:33 ` Jeff V. Merkey
2000-10-31 21:48 ` Rik van Riel
2000-10-31 16:54 ` Reto Baettig
2000-10-31 21:58 ` Rik van Riel
2000-10-31 21:53 ` Jeff V. Merkey
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