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From "Jeffrey W. Baker" <jwba...@acm.org>
Subject Re: AAP vs. Zeus (was Re: AAP patch for 2.0a6 available)
Date Wed, 06 Sep 2000 22:14:05 GMT
On Wed, 6 Sep 2000, Mike Abbott wrote:

> 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%

Well, that stinks.  From what workload were these figures derived?  Since
you mention negative CPU scalability in Linux 2.2, I would assume that you
are spraying static content over a fast wire.

-jwb


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