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SubjectRe: 2.2.3, VIA, IDE, performace -> use bonnie
On Sat, 20 Mar 1999, Meelis Roos wrote:

> jpcd> Various tests describe this thing as fast (~6.5 MB/sec), and it is the only
> jpcd> IDE device I have in my machine, but hdparm only tells me 2.5MB/sec (my
> jpcd> DCAS-34330W does 5.8MB/sec according to hdparm, and ~4MB/sec according to
> jpcd> magazines).
> Only a little realted (but still): Intel Celeron 366 with some Intel
> chipset. Originally had 4G IBM DTTA disk. hdparm showed 11.85 MB/s.
> Then the disk was upgraded to a 8G IBM DTTA. Now hdparm reports 5.9..6.2
> M/s on the first run. Slower than it showed for the 4G disk.
> Now the interesting part: running hdparm -t /dev/hda again (and again
> and again) shows constantly 84.21 MB/s. This is the part I can't
> understand - even if the disk is capable of caching the data, EIDE would
> not let more than 33 MB/s through.

RAM lets through more than 33MB/s...

Why don't you use bonnie for your benchmarks? (writes&reads to a file of
up to 2GB with different strategies (per char (large cpu overhead), per
block (small cpu overhead)), and it does seeks as a benchmark.

Though probably even bonnie can be improved, it's much better than hdparm
for quick tests.


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