Date: Thu, 8 Jun 2000 15:40:41 -0400 (EDT) From: mi@privatelabs.com To: Gerhard Sittig <Gerhard.Sittig@gmx.net> Cc: stable@FreeBSD.ORG Subject: Re: changes in dd? Message-ID: <200006081940.PAA00971@misha.privatelabs.com> In-Reply-To: <20000608194615.N9883@speedy.gsinet>
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On 8 Jun, Gerhard Sittig wrote: = On Wed, Jun 07, 2000 at 17:08 -0400, Mikhail Teterin wrote: = > = > My command line is: = > ssh -o'Compression no' -e none -c blowfish <server> \ = > dd ibs=1 count=<size> of=/dev/null < /kernel.GENERIC = = Look at what you do here: You shuffle *many* tiny packets around each = of them being *one* byte long. This will result in a _very_ tight loop = eating time without any making sense. I understand, but why am I seeing different behavior on different machines? Why does not April 19 -stable care and still shows the same speed, but the June 2 -stable cares and demostrates terrible performance drop? = How about doing this with _one_ block of the size you want? I.e. what = stops you from swapping the count and bs parameters? That's a good idea, thanks! How come I did not think of it myself :) ? Of course, now I already wrote my own program :( ... Yours, -mi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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