From owner-freebsd-stable  Thu Jun  8 12:42:17 2000
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From: mi@privatelabs.com
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Date: Thu, 8 Jun 2000 15:40:41 -0400 (EDT)
Subject: Re: changes in dd?
To: Gerhard Sittig <Gerhard.Sittig@gmx.net>
Cc: stable@FreeBSD.ORG
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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




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