Date: Wed, 21 Jul 2004 08:24:08 +1200 From: Drew Broadley <drew@corrupt.co.nz> To: Kevin Oberman <oberman@es.net> Cc: Scott Long <scottl@freebsd.org> Subject: Re: HEADS UP [Re: thread+preemption stability improvement] Message-ID: <40FD7F68.8030601@corrupt.co.nz> In-Reply-To: <20040720195643.89CA85D08@ptavv.es.net> References: <20040720195643.89CA85D08@ptavv.es.net>
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Kevin Oberman wrote: >>Date: Tue, 20 Jul 2004 13:13:48 -0600 >>From: Scott Long <scottl@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
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