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- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!ukma!darwin.sura.net!jvnc.net!nuscc!ntuix!eoahmad
- From: eoahmad@ntuix.ntu.ac.sg (Othman Ahmad)
- Subject: Re: bonnie i/o test results
- Message-ID: <1992Nov8.152611.26176@ntuix.ntu.ac.sg>
- Organization: Nanyang Technological University - Singapore
- X-Newsreader: TIN [version 1.1 PL6]
- References: <CGD.92Nov6232822@eden.CS.Berkeley.EDU>
- Date: Sun, 8 Nov 1992 15:26:11 GMT
- Lines: 61
-
- Chris G. Demetriou (cgd@eden.CS.Berkeley.EDU) wrote:
- :
- : LOOK, I'M SURE I'M NOT THE ONLY ONE WHO'S SICK OF SEEING BENCHMARKS WITH
- : ABSOLUTELY NO TECHNICAL MERIT.
-
- No benchmark is perfect but at least we have figures. I'm fed up of people
- who only say but do not produce any figure. Those who say the most does not
- mean that they are right.
- :
- : PLEASE, before posting any more benchmarks:
- : (1) learn about disk architecture.
- : If you knew anything about it, you'd know
- : that seek time is *disk* dependent, not
- : controller dependent.
- I recommend you read more about controller architecture. John Bass article
- is a starter.
- :
- : (2) run the benchmarks on "equivalent" hardware.
- : for instance, Maxtor 200M IDE vs. Maxtor 200M SCSI
- : (i'd to the SCSI benchmark for you, but the only
- : Maxtor 200M SCSI I have kicked off a few months ago...)
- :
- Only if you are into stupid wasteful theoretical study. If you want to maximse,
- you worth, just test on what is available, for your particular application.
-
- I did not state any conclusion for various reasons. It takes too long.
- bonnie is better in giving you the microprocessor load. It helps to have
- fast microporcessors, as in the case of Julian.
-
- The only easy conclusion is that Julian i/o system is not as good as our
- i/o 486/33 system, although it is an EISA SCSI system.
- I'm not sure about the reasons but I suspect it is due to the
- fragmentation.
-
- 486/33 Maxtor 200M IDE
- -------Sequential Output-------- ---Sequential Input-- --Random--
- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
- Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
- 16 363 66.8 353 6.2 221 10.3 440 90.0 486 9.3 28.1 5.2
-
- This 1Mbyte test is actually testing the efficiency of your buffer cache. I'm
- not sure how large the buffer cache is in 386bsd.
- Linux integrated buffer/user space cache design is a big win here
- but nobody has come up with any figure.
- Some e-mail me in saying that he can get 5Mbyte/second. It is faster
- than any workstation that I've tested. However I do not trust it so much
- until he posts the complete test details.
-
- -------Sequential Output-------- ---Sequential Input-- --Random--
- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
- Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
- 1 504 94.6 332 6.5 182 7.8 346 67.6 441 9.5 107.8 17.4
-
-
-
- --
- Othman bin Ahmad, School of EEE,
- Nanyang Technological University, Singapore 2263.
- Internet Email: eoahmad@ntuix.ntu.ac.sg
- Bitnet Email: eoahmad@ntuvax.bitnet
-
-