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From m..@trudge.engr.sgi.com (Mike Abbott)
Subject AAP vs. Zeus (was Re: AAP patch for 2.0a6 available)
Date Wed, 06 Sep 2000 22:02:55 GMT
Jim Jagielski wrote:
> It would be interesting to see how it compares to your Zeus
> implementation ;)

Yes, it was interesting.  Thanks for the suggestion.

On a dual-PentiumIII Linux 2.4 system we found that Apache/2.0 with the
state-threaded MPM runs at about 2/3 the speed of Zeus 3.3.  With the
dexter MPM it runs at about 1/2 Zeus.  For reference, Apache/1.3.12
fully accelerated with the AAP's patches runs faster than Zeus and
spends 1/2 as much time as Zeus and 1/4 as much time as Apache/2.0 in
user mode.  Linux 2.2 exhibits negative scalability (two processors are
slower than one); 2.4 is much better.  Here's the Linux 2.4 data
normalized to Apache/1.3.12:

software		speed	user / system time
--------		-----	------------------
Apache/1.3.12 + AAP	1.00	6% / 94%
Zeus 3.3		0.92	13% / 87%
Apache/2.0a4 + STM	0.68	25% / 75%
Apache/2.0a4 + dexter	0.54	25% / 75%

There's plenty of performance work left in Apache/2.0.
-- 
Michael J. Abbott        mja@sgi.com        http://reality.sgi.com/mja/

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