RELENG_7 jerky mouse and skipping sound (still a problem -BETA3)

Kris Kennaway kris at
Fri Jan 4 12:57:20 PST 2008

Josh Carroll wrote:
>>> OK, can you obtain a schedgraph trace when the problem is manifesting?
>>> See /usr/src/tools/sched/ and previous discussion in this or related
>>> threads.
>> Anyone?  Time is rapidly running out to get this fixed in time for
>> 7.0-RELEASE, so we need this trace ASAP.
> Kris,
> I would be happy to try to reproduce this and provide the necessary
> trace/debug info, however I admit at this point I'm not sure which set
> of kernel configuration and/or setup is causing the issue.
> As I said in a previous message, I solved the jerkiness by using
> moused and pointing xorg.conf to /dev/sysmouse. Shall I try with
> /dev/psm0 instead and provide the schedgraph info? Or is enabling
> PREEMPTION (which I have done in my custom kernel) already "fixing"
> this for me, and therefore should I use a GENERIC kernel, just
> substituting SCHED_4BSD with SCHED_ULE?

The problems I am currently interested in are people who have not found 
an acceptable workaround for their performance problems :)

There are outstanding reports of people for whom (as I understand it) 
neither scheduler performs well on UP 7.0 systems when running X, 
compared to the same version of X on 6.x.  i.e. there seems to be some 
kind of regression that we need to understand and then fix.


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