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SubjectRe: File I/O benchmarks for various kernel
Date
Hi,

Some more numbers to consider:

7.3 MB/s 54.7s user 159.6s system 25% cpu elaspsed 14:21.9m
reiserfs on hda whick gets 16.1 MB/s from hdparm -t

9.7 MB/s 51.6s user 78.3s system 19% cpu elaspsed 10:50.8m
ext2 on hdb which gets 10.6 MB/s from hdparm -t

both drives are udma33. The sytem is a K6-III 400 with 128m running:
2.4.0test13pre6 + reil #2 + drm fix + reiserfs 3.6.23

Think ext2 is doing pretty good. I have seen comments that imply dbench
does not show reiserfs at its best - they favor the bonnie suite.

Luck
Ed Tomlinson

Daniel Phillips wrote:

> I've been using dbench a lot lately for reality checks on various kernel
> mods, and out of interest I decided to run benchmarks with it on a few
> different kernel versions. I noticed a major difference between 2.2 and
> 2.4 kernels - 2.4 is running the benchmarks about 3 times faster than
> 2.2, and it seems to be getting faster with each step towards 2.4.0. On
> the other hand, 2.2 seems to be getting slower. Here are a few points
> on the curve.
>
> Test machine: 64 meg, 500 Mhz K6, IDE, Ext2, Blocksize=4K
> Test: dbench 48
>
> Kernel Throughput Elapsed Time
> ------ ---------- ------------
> 2.2.16 3.1 MB/sec 33 min 53 secs
> 2.2.18 2.8 MB/sec 38 min 10 secs
> 2.2.19-pre3 2.7 MB/sec 39 min 44 secs
> 2.4.0-test12 7.3 MB/sec 14 min 32 secs
> 2.4.0-test13-pre4 9.5 MB/sec 11 min 06 secs
> 2.4.0-test13-pre5 10.8 MB/sec 9 min 48 secs
>
> Dbench was written by Andrew Tridgell to measure disk performance under
> simulated samba network traffic load. The '48' means it's simulating
> the file access patterns of 48 network clients, all doing heavy io at
> the same time.
>
> For anyone interested in checking these results on their own hardware,
> dbench is available at:
>
> ftp://samba.org/pub/tridge/dbench/dbench-1.1.tar.gz
>
> --
> Daniel
> -
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