Bill Davidsen wrote:
Miguel Figueiredo wrote:
Ray Lee wrote:
On 5/20/07, Miguel Figueiredo <[email protected]> wrote:
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.
Uhm, then why are you trying to use them to compare against Bill's
numbers? You two have completely different hardware setups, and this
is a test that is dependent upon hardware. Stated differently, this is
a worthless comparison between your results and his as you are
changing multiple variables at the same time. (At minimum: the
scheduler, cpu, and video card.)
The only thing i want to see it's the difference between the behaviour
of the different schedulers on the same test setup. In my test -ck2
was a bit better, not 200% worse as in Bill's measurements. I don't
compare absolute values on different test setups.
Since I didn't test ck2 I'm sure your numbers are unique, I only tested
the sd-0.48 patch set. I have the ck2 patch, just haven't tried it
yet... But since there are a lot of other things in it, I'm unsure how
it relates to what I was testing.
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...
It doesn't look like you were running his glitch1 script which starts
several in glxgears parallel. Were you, or were you just running one?
No i'm not, i'm running only one instance of glxgears inside the
GNOME's environment.
If you test the same conditions as I did let me know your results.
Hi Bill,
if i've understood correctly the script runs glxgears for 43 seconds and
in that time generates random numbers in a random number of times
(processes, fork and forget), is that it?
You find the data, for 2.6.21-{cfs-v13, ck2} in
http://www.debianpt.org/~elmig/pool/kernel/20070522/
Here's the funny part...
Lets call:
a) to "random number of processes run while glxgears is running",
gl_fairloops file
b) to "generated frames while running a burst of processes" aka "massive
and uknown amount of operations in one process", gl_gears file
kernel 2.6.21-cfs-v13 2.6.21-ck2
a) 194464 254669
b) 54159 124
--
Com os melhores cumprimentos/Best regards,
Miguel Figueiredo
http://www.DebianPT.org
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