Date: Wed, 07 Mar 2007 21:10:02 +0100 From: Ivan Voras <ivoras@fer.hr> To: freebsd-stable@freebsd.org Cc: freebsd-geom@freebsd.org Subject: Re: Some Unix benchmarks for those who are interesed Message-ID: <45EF1C1A.5080200@fer.hr> In-Reply-To: <001601c760ee$f76fa300$0c00a8c0@Artem> References: <20070306020826.GA18228@nowhere> <45ECF00D.3070101@samsco.org><20070306050312.GA2437@nowhere><008101c75fcc$210c74a0$0c00a8c0@Artem> <esk9vq$uhh$1@sea.gmane.org><001a01c7601d$5d635ee0$0c00a8c0@Artem> <eskka8$adn$1@sea.gmane.org><001801c7603a$5339e020$0c00a8c0@Artem> <eskpd1$sm4$1@sea.gmane.org> <20070307105144.1d4a382f@daydream.goid.lan><002801c760e2$5cb5eb50$0c00a8c0@Artem> <esmvnp$khs$1@sea.gmane.org><005b01c760e6$9a798bf0$0c00a8c0@Artem> <esn2s6$1i9$1@sea.gmane.org> <001601c760ee$f76fa300$0c00a8c0@Artem>
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[-- Attachment #1 --]
Artem Kuchin wrote:
> Now i am lost. i get 81MB/sec on dd but still you get
>
> File Copy 1024 bufsize 2000 maxblocks 3960.0 159513.0 402.8
>
> and i get
>
> File Copy 1024 bufsize 2000 maxblocks 3960.0 109313.0 276.0
>
> The drives i use are Seagate 7200.10 (320Gb, SATA II, 16MB cache
> with perpendicular heads)
>
> How is it possible that you get 2x file copy perfomance ? What's the
> matter?!
I don't know - what are your seek times?
# diskinfo -t /dev/mirror/data
/dev/mirror/data
512 # sectorsize
249999999488 # mediasize in bytes (233G)
488281249 # mediasize in sectors
Seek times:
Full stroke: 250 iter in 1.591444 sec = 6.366 msec
Half stroke: 250 iter in 1.468315 sec = 5.873 msec
Quarter stroke: 500 iter in 2.828050 sec = 5.656 msec
Short forward: 400 iter in 2.958083 sec = 7.395 msec
Short backward: 400 iter in 2.465687 sec = 6.164 msec
Seq outer: 2048 iter in 0.337428 sec = 0.165 msec
Seq inner: 2048 iter in 0.384791 sec = 0.188 msec
Transfer rates:
outside: 102400 kbytes in 1.737217 sec = 58945 kbytes/sec
middle: 102400 kbytes in 1.811793 sec = 56519 kbytes/sec
inside: 102400 kbytes in 2.938688 sec = 34845 kbytes/sec
drives:
ad4: 238418MB <WDC WD2500JS-75NCB3 10.02E04> at ata2-master SATA150
ad6: 238418MB <WDC WD2500JS-75NCB3 10.02E04> at ata3-master SATA150
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