[omniORB] Strange performance problems

[Ole Dalgaard]

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Hi!

I was about to do a simple performance test on omniORB 2.7.1 and
encountered a strange problem.  I am sending an array as parameter.
When using array sizes below 3810 bytes making 1000 calls takes 1-1.3
seconds, but when using array sizes from 3810 and up, it takes 19-20
seconds. I am using linux, have tried kernels 2.2.5 and 2.2.10 on SMP
and non-SMP. Using array sizes from 3810 and up consumes almost no
CPU-time, while using smaller sizes takes almost all CPU.

Exactly the same happens on Sun Solaris, here the magick limit is
between 8137 and 8138. The test ran on a Ultra Enterprise 2.

I have attached the source.
Please help me! What am I doing wrong?

Regards
Ole Dalgaard
Computer Science student

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