Yesterday I did some tests how Zaurus C760 (ARM PXA255 at 400MHz) works with cpufreq enabled kernel (2.6.13-mm1). I have few frequences (100, 200, 300, 400MHz) and modes available:
- conservative (300MHz)
- ondemand (autoregulated from 100MHz to 400MHz)
- powersave (100MHz)
- userspace (let user set what he want)
- performance (400MHz)
OPIE sysinfo benchmarks results:
| Test name | 100MHz | 200MHz | 300MHz | 400MHz | 400MHz 2.4 kernel |
|---|---|---|---|---|---|
| Integer arithmetics (dhrys) | 115814 | 231669 | 348554 | 466092 | 450248 |
| Floating point unit (seconds) | 15.50 | 6.42 | 3.72 | 2.77 | 3.11 |
| Text rendering (chars/s) | 152 | 354 | 354 | 633 | 456 |
| Gfx rendering (gops/s) | 311.17 | 753.58 | 860.25 | 1270.08 | 1441.00 |
| RAM performance (MB/s) | 8.09, 4.68 | 22.22, 15.14 | 31.00, 18.13 | 48.83, 26.48 | 25.78, 16.17 |
| CF card performance (MB/s, kb/s) | 16.77, 63.56 | 25.53, 70.73 | 30.76, 72.27 | 48.52, 77.46 | not tested |
Notes:
Results are weird.. RAM performance under 2.4 kernel can be 26 MB/s in one test, 44 MB/s in other, 33 MB/s in another one. Gfx performance also jumps — 1440 in one attempt, 917 in another…
I cannot test CF card under 2.4 as I do not have pcmcia-cs installed (using pcmciautils under 2.6 kernel).