As I tryied myself kernels 2.6.21, 2.6.21-cfs-v13, and 2.6.21-ck2 on the
same machine i found *very* odd those numbers you posted, so i tested
myself those kernels to see the numbers I get instead of talking about
the usage of kernel xpto feels like.
I did run glxgears with kernels 2.6.21, 2.6.21-cfs-v13 and 2.6.21-ck2
inside Debian's GNOME environment. The hardware is an AMD Sempron64 3.0
GHz, 1 GB RAM, Nvidia 6800XT.
Average and standard deviation from the gathered data:
* 2.6.21: average = 11251.1; stdev = 0.172
* 2.6.21-cfs-v13: average = 11242.8; stdev = 0.033
* 2.6.21-ck2: average = 11257.8; stdev = 0.067
Keep in mind those numbers don't mean anything we all know glxgears is
not a benchmark, their purpose is only to be used as comparison under
the same conditions.
One odd thing i noticed, with 2.6.21-cfs-v13 the gnome's time applet in
the bar skipped some minutes (e.g. 16:23 -> 16:25) several times.
The data is available on:
http://www.debianPT.org/~elmig/pool/kernel/20070520/
How did you get your data? I am affraid your data it's wrong, there's no
such big difference between the schedulers...