Original Kernel compilation with performances degraded[NO PROCESS TO PROVE IT]

[Daniel]

I confirm that i don't do any modification in the original .config file! (make menuconfig not done).

Effectively, seeing kernel size, something is different!
Certainly in my configuration, if anyone has done the same test and has 'good' results!

I just want to have same performances, with finding the problem origin!
If I have the problem, some others can have it, without notice.
then, 20% better performances is goog, isn't it ?

Thanks
Daniel.

[gerald_clark]

I certainly have not seen even one reported performance measurement.
Reputable benchmarks should be used.

[Daniel]

Graphical performances are what i want!

This FpS meter is very good for that (and cpu calculation).



I have 2 hardware machines.
After finishing one, i will set the intel emgd graphic driver corresponding to my hardware.
Without it, i have very very bad graphical performances with original kernel.

...

[bmarkus]

Hey, I'm jus joking Don't take it serious...

 

[Daniel]

 

[curaga]

It's not unexpected to get slightly different size even with the same config. I believe the parallel options (-jX to make) can alter the build order, and thus compression.

[gerald_clark]

As could different uninitialized data in partially filled blocks.

[Rich]

Hi Daniel
Ok, now we finally know your goal, graphics performance. How fast are your machines, how
much RAM, and which video cards are you using. As a general rule the kernel is the last place
to look if you are having performance issues. The first suspects are applications and drivers.
If it's a driver issue you can use modprobe to install a different driver without touching the kernel.

It's not unexpected to get slightly different size even with the same config. I believe the parallel options
(-jX to make) can alter the build order, and thus compression.

Exactly. The compiler's output is based on it's input and what you tell it to do. If you use the same tools,
sources, switches, and options you will get the same output.

[hiro]

Exactly. The compiler's output is based on it's input and what you tell it to do. If you use the same tools,
sources, switches, and options you will get the same output.

Sure about that? I'm not...

[Rich]

Hi hiro
Pretty sure. You can have multiple copies of the compiler running off and generating
object files in parallel, but when it comes time to link only one process can be
writing to an output file for a given link command. Plus the makefiles list the order in
which to add individual object files into output files.

[Daniel]

Rich,

Yes, i want graphical performances as best as possible.

The video driver is verry important : Intel 945GSE (GMA950) with shared 224Mb.
1Gb RAM

But, this is not the actual problem:
The problem is the performances differences between original kernel and its compiled sources.

Before i try to win more better performances, i've loose 20%!!!


I expect this is comming from my configuration, and when repared, i'm shure i will have best performances as possible!

Thanks all
Daniel.

[Miller]

Hmmmmm,

Sounds like the flux capacitor may need a re-alignment...

Miller.

[Daniel]

Hi,

I've build all again : same result.

I'm trying to do an other TCL install and doing all again!
(it is possible in less than 15 mn).

If anybody can do the same test, we will see if I have a problem, or if the result is 'normal' with downloaded sources and configuration ...

Thanks
Daniel.

[Daniel]

I was looking sources to download all again ...

To do my tests, i download (and compile) kernel 2.6.33 patched ... but date is 2010-Apr-27.

And the 3.4 TCL (my original install) is after!

If i am not wrong, what have i to do to have exactly the same sources to be compiled to have same performances résults ?
Or modifications are only in mods ?

D.

[hiro]

There are also some patches (see the dates), which were applied after the generation of said kernel you downloaded.
Not sure how this would change performance, but you might give it a try
Perhaps it will only be fast enough if you pray to your god a little more?
http://distro.ibiblio.org/pub/linux/distributions/tinycorelinux/3.x/release/src/kernel/33-patch-series/