Re: Comparison between 2.4.8-ac4-new-zoned and 2.4.9pre3 VM perf

Daniel Phillips (phillips@bonn-fries.net)
Wed, 15 Aug 2001 18:52:21 +0200


On August 15, 2001 04:10 pm, Marcelo Tosatti wrote:
> I've compared 2.4.8-ac4 performance with 2.4.9pre3 using postmark. I used
> this specific benchmark because it allows me to set read/write ratio of IO
> transactions.
>
> [...]
>
> The tests have shown that the 2.4.9pre is a bit slower than
> 2.4.8ac4+newzone.

I reaarranged the results to clarify...

> bias read 10 (approx 10/1 read/write ratio)
>
> 2.4.8-ac4-newzoned
> 45000.00 megabytes read (19.87 megabytes per second)
> 25230.00 megabytes written (11.14 megabytes per second)
>
> 2.9.4-pre3
> 45000.00 megabytes read (19.88 megabytes per second)
> 25230.00 megabytes written (11.14 megabytes per second)

The read-heavy results are virtually identical.

> bias read 1 (approx 1/10 read/write ratio)
>
> 2.4.8-ac4-newzoned
> 4380.00 megabytes read (6.75 megabytes per second)
> 25230.00 megabytes written (38.88 megabytes per second)
>
> 2.9.4-pre3
> 4380.00 megabytes read (6.35 megabytes per second)
> 25230.00 megabytes written (36.57 megabytes per second)

For even read/write balancing ac4-newzoned is 6% faster. It's still
anybody's race ;-)

--
Daniel
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