Experiences with RELENG_7

Kris Kennaway kris at FreeBSD.org
Sun Oct 28 04:00:19 PDT 2007

P.U.Kruppa wrote:
> On Sun, 28 Oct 2007, Kris Kennaway wrote:
>> P.U.Kruppa wrote:
>>> On Sun, 28 Oct 2007, Kris Kennaway wrote:
>>>> Roland Smith wrote:
>>>>> On Sun, Oct 28, 2007 at 01:44:21AM +0200, Kris Kennaway wrote:
>>>>>> Roland Smith wrote:
>>>>>>> Hovewer, sometimes a program seems to hog the CPU for a couple of
>>>>>>> seconds (as seen in top(1))
>>>>>> Can you please explain (with supporting paste of command output) 
>>>>>> what you mean by this?
>>>>> I'll save some top output next time. But what happened was this; 
>>>>> all of
>>>>> a sudden the mouse pointer started moving erratically, and the music
>>>>> playing in audacious started skipping. All other X programs started
>>>>> responding erratically as well. It looked like the X server wasn't
>>>>> getting any CPU time.
>>> I can see that happening during portupgrade on my 7.0-BETA1 FreeBSD 
>>> 7.0-BETA1 #0: Sat Oct 27 04:15:22 CEST 2007 amd64 UP-machine as well. 
>>> Situation has been improved by using
>>> SCHED_ULE instead of SCHED_4BSD .
>> Yes, so this is a different problem again.  People have reported this 
>> problem with 4BSD, but I don't think it is understood.  Just to 
>> confirm, since we're discussing ULE here do you see this problem with 
>> ULE?
> Yes, but as I said, ULE works better than 4BSD.

OK, so what does "works better" mean?


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