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ThorstenHirsch
Tux's lil' helper
Joined: 25 Sep 2003
Posts: 111
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 Posted: Mon Jan 30, 2006 2:25 pm Post subject: extremely poor character-IO performance |
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Hi,
I've run bonnie++ on some different platforms. Interesting to see, that my U10 under Gentoo has such a poor performance for "Sequential Output - Per Chr (K/sec)":
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Gentoo/U10: 50
NetBSD/U1: 2.600
Linux*/PowerPC: 6.500
Linux*/x86: 65.500
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* = Debian 3.1 or SLES 9
The other values for character-based access are in the same relation. The differences in block-access are by far not so big. So what's the reason, that especially the character based access is so slow under Linux/SPARC? Even my U1 (143MHz/128MB RAM) is more than 50 times faster with NetBSD running than my U10 (440MHz/1GB RAM) with Gentoo running.
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gust4voz
Retired Dev
Joined: 09 Sep 2003
Posts: 373
Location: Buenos Aires, Argentina
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| Posted: Mon Jan 30, 2006 6:48 pm Post subject: |
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Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ayanami 1G 3732 97 33215 60 14766 30 3790 99 34574 36 397.6 4
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 7923 98 +++++ +++ 11307 99 7834 96 +++++ +++ 11313 99
ayanami,1G,3732,97,33215,60,14766,30,3790,99,34574,36,397.6,4,16,7923,98,+++++,+++,11307,99,7834,96,+++++,+++,11313,99
That's what i get on my U5, which is basically the same as a U10.
The only likely difference is that i'm on scsi and you're probably on ide, and the ide controller on u5/10 machines (or most Sun sparc machines for that matter) tends to be very sucky and buggy.
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Gustavo Zacarias
Gentoo/SPARC monkey |
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Gentoo on Sparc
