Date: Sat, 24 Feb 1996 18:22:13 +1100 From: Bruce Evans <bde@zeta.org.au> To: rashid@rk.ios.com, se@ZPR.Uni-Koeln.DE Cc: hackers@freebsd.org Subject: Re: Disk perf. with different HDs/Adapt. Message-ID: <199602240722.SAA23535@godzilla.zeta.org.au>
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>} For example >} (command is: dd if=/dev/rsd0a of=/dev/null count=200 bs=64k) >} >} P166/ASUS/Aha2940(not wide,Seagate): >} 13107200 bytes transferred in 2 secs (6553600 bytes/sec) >If you report 'dd' numbers, then **please** add at least 'time' info ... >E.g.: ># 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 >... >Those 1.92 seconds make for exactly 6826667 Bytes per second ... >And the 7.43 give some 6962656 Bytes/s. >(Yes, I know, the results aren't exact to more than 2 decimals >due to the limited time resolution ...) Someone should fix dd to use the available resolution of 4-6 decimal places. I suppose the output of `time' is too standard to change. Bruce
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