Clock speed tests

[mengstr]

I ran some performance tests for all the supported clock speeds and they all pretty much have a spot on relative performance compared to a 52MHz base reading. But the 189 MHz sticks out like a sore thumb ;-)

Any idea why?

Mhz	Elapsed	Theoretical	Diff
52	134.61	x	x
80	87.50	87.50	0.0
104	67.31	67.31	0.0
115	60.58	60.87	-0.3
160	43.75	43.75	0.0
173	40.38	40.46	-0.1
189	38.15	37.04	1.1
231	30.29	30.30	0.0
320	21.85	21.87	0.0
346	20.19	20.23	0.0
378	18.99	18.52	0.5

The script for testing and the tested code are available in the gist below if anyone is interested... https://gist.github.com/mengstr/f625137ca053c97bd6f6bc5e1ea230c8

[cnlohr]

Yep. 1040 MHz/divisor.

~189 MHz is 1040/5.5.