Re: HEADS UP [Re: thread+preemption stability improvement]

From: Drew Broadley <drew_at_corrupt.co.nz>
Date: Wed, 21 Jul 2004 08:24:08 +1200
Kevin Oberman wrote:

>>Date: Tue, 20 Jul 2004 13:13:48 -0600
>>From: Scott Long <scottl_at_samsco.org>
>>
>>Kevin Oberman wrote:
>>    
>>
>>>I just rebuilt my kernel and the problem is back. :-(
>>>
>>>I sure hope peter or Scott can figure this out soon. The kernel has now
>>>changed enough that backing off the 4 files I was backing off is no
>>>longer adequate, so I am again running with preemption turned off.
>>>
>>>System is P4-M 1.8 GHz UP with SCHED_ULE. It reliably dies on a
>>>buildworld.
>>>      
>>>
>>Does it work better if you remove the PREEMPTION define in 
>>/sys/i386/include/param.h?
>>    
>>
>
>Scott,
>
>That's how I built my current kernel and it's at least fairly painful It
>does not freeze any longer, but the interactivity is poor. I'm not sure
>if it's as bad as last time I tried, but my editor freezes for seconds
>at a time and then catches up once something gets scheduled. (I think
>it's the X server and not the editor that is the issue.)
>
>It's better than the freezes, but it's pretty painful.
>
>I can provide configs, logs (nothing there, though) or any other
>information.
>  
>
Change the HZ to 2000 in the kernel. This will help handle the backlog 
introduced by removing PREEMPTION
Received on Tue Jul 20 2004 - 18:25:39 UTC

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