From owner-freebsd-hackers  Mon Feb 26 22:49:45 1996
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Date: Tue, 27 Feb 1996 17:45:41 +1100
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199602270645.RAA15371@godzilla.zeta.org.au>
To: coredump@nervosa.com, lehey.pad@sni.de
Subject: Re: Disk perf. with different HDs/Adapt.
Cc: bde@zeta.org.au, hackers@freebsd.org
Sender: owner-hackers@freebsd.org
Precedence: bulk

>On Mon, 26 Feb 1996, Greg Lehey wrote:
>> How about a high-resolution option.  For example,
>>  # time dd if=/dev/rsd0a of=/dev/null count=200 bs=64k
>>  13107200 bytes transferred in 2 secs (6553600 bytes/sec)
>>  1.92 real         0.01 user         0.05 sys
>>  # time -h dd if=/dev/rsd0a of=/dev/null count=200 bs=64k
>>  13107200 bytes transferred in 2 secs (6553600 bytes/sec)
>>  1.920317 real 0.009387 user    0.0512614 sys
>> Greg

>How about you just use Bonnie. dd was not intended to be a benchmark 
>utility, I see no reason extending it's output for this.

Bonnie doesn't work on raw disks and isn't always available.  dd should
report the time accurately if it reports it at all.

Bruce