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Re: Poor interactive response from the FC2 kernel on SMP hardware?



I had some of the same issues but reduced a lot of them by setting the default stack size back to 8k.  Fedora set it to 4k mainly to help javas performance and that was about it.  Also, the inconsistencies you are experiencing with applications may be for the same reason.  I am using a dual and it seemed to work fine after re-compiling a vanilla kernel.

Another possibility is that Fedora uses there own asynchronous I/O patch, which may conflict with the new 2.6 kernels scheduler.

My machine that worked:
    - 2x Athlon MP
    - 2GB Registered RAM
    - NVIDIA ...
    - Blah blah blah
    - ...

These are all guesses...

On Thu, 2004-05-20 at 21:48, Dan Berger wrote:
Folks - I've been running FC1 with a home-build (stock) 2.6.X kernel for several months without issue. 

I upgraded to FC2 the other night and was immediately struck by the poor interactive performance of the system.  Audio (Ogg) played via rythmbox skips and stutters during I/O, the GUI pauses for "long" periods (where long is > 0), etc.

I just built a stock 2.6.6 kernel using the i686 smp config file shipped with FC2, and performance is much improved.  (I'm typing this, listening to music, and doing a make clean on the kernel tree with no stuttering.)

Have others seen this issue?  Is it known?  A search of this list didn't turn up anything that clearly matched, nor did a search of RH Bugzilla.

Cheers.

--

...Dan Berger [dberger oubliette org]
   http://www.oubliette.org/~dberger
   Inter arma silent leges
   A982 E6B1 CB2F 7A49  843A 9297 DA73 4371  1F54 8D0C

   "Little soul, big world. Eat, sleep, and eat. Many souls."
   "Cattle on the ship three weeks, she don't go near 'em. Suddenly
    we're on Jianying, and she's got a driving need to commune with the
    beasts?"
   "They weren't cows inside. They were waiting to be, but they
    forgot. Now they see sky, and they remember what they are."
   "Is it bad that what she said makes perfect sense to me?"

                         - River and Mal, Firefly: "Safe"


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