From owner-freebsd-current@FreeBSD.ORG  Mon May 26 05:21:24 2003
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To: Christophe Zwecker <doc@zwecker.de>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Mon, 26 May 2003 14:09:10 +0200."
             <3ED203E6.1000202@zwecker.de> 
Date: Mon, 26 May 2003 14:21:19 +0200
Message-ID: <98794.1053951679@critter.freebsd.dk>
cc: current@freebsd.org
Subject: Re: gbde Performance - 35Mb/s vs 5.2 MB/s 
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In message <3ED203E6.1000202@zwecker.de>, Christophe Zwecker writes:
>Hi,
>
>I  get 35MB/s write without gbde and 5 MB on a gbde crypted device.

>here how I tested:
>
>Crypted device:
>dd if=/dev/zero of=/mnt/test0.trash bs=1024k count=100
>104857600 bytes transferred in 19.927204 secs (5262033 bytes/sec)
>
>Noncrypted:
>dd if=/dev/zero of=/test0.trash bs=1024k count=100
>104857600 bytes transferred in 2.993742 secs (35025597 bytes/sec)
>
>Could anyone tell me if this is supposed to be slow like that ? Or is
>there anything I missed ?

This sounds pretty likely for write performance.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.