Message-ID: <036a01c3778e$ebadc080$5aaf7450@wssupremo>
Reply-To: "Luca Veraldi" <luca.veraldi@katamail.com>
From: "Luca Veraldi" <luca.veraldi@katamail.com>
To: "Nick Piggin" <piggin@cyberone.com.au>
Cc: "linux-kernel" <linux-kernel@vger.kernel.org>
References: <00f201c376f8$231d5e00$beae7450@wssupremo> <20030909175821.GL16080@Synopsys.COM> <001d01c37703$8edc10e0$36af7450@wssupremo> <20030910064508.GA25795@Synopsys.COM> <015601c3777c$8c63b2e0$5aaf7450@wssupremo> <1063185795.5021.4.camel@laptop.fenrus.com> <20030910095255.GA21313@mail.jlokier.co.uk> <20030910120729.C14352@devserv.devel.redhat.com> <20030910103752.GC21313@mail.jlokier.co.uk> <20030910124151.C9878@devserv.devel.redhat.com> <02bc01c37789$ebfa9a40$5aaf7450@wssupremo> <3F5F0820.3090003@cyberone.com.au>
Subject: Re: Efficient IPC mechanism on Linux
Date: Wed, 10 Sep 2003 13:30:19 +0200
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> Hi Luca,
> There was a zero-copy pipe implementation floating around a while ago
> I think. Did you have a look at that? IIRC it had advantages and
> disadvantages over regular pipes in performance.

Sorry, but i subscripted this mailing-list only one day ago.
Advantages and disadvantages depends on what actually you implement
and on how you do that.

I can only say that capabilities are a disadvantage only with very very
short messages
(that is, a few bytes). And this disadvantage is theoretically demonstrable.

But, let's say also that such elementary messages are meaningful only in the
kernel
and for kernel purposes.

User processes are another tail.

Bye,
Luca

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