Very Computer

We are starting to experiment with the real time scheduling class with
solaris 5.4.  Scheduling Xsun as a real time process (the only one in
the system) sometimes produces system lockups that require a power flip.
The lockups always occur when the system as a whole is under a severe load.

Is anyone aware of any problems with Xsun or Solaris 5.4 that would cause
system lockups?    (Time quantums should equal the default)

Glen
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Glen L. Rudie                           Marquette Medical Systems

414.362.3309                            Milwaukee  WI, 53223  USA

r> We are starting to experiment with the real time scheduling class
r> with solaris 5.4.  Scheduling Xsun as a real time process (the only
r> one in the system) sometimes produces system lockups that require a
r> power flip.  The lockups always occur when the system as a whole is
r> under a severe load.

Bad programmer!  No biscuit!  You should NOT run the X server as a
real-time process because, as you are noticing, it will quite happily
slurp up all of your CPU at times.

r> Is anyone aware of any problems with Xsun or Solaris 5.4 that would
r> cause system lockups?

This is not a problem with either Solaris or Xsun, but rather with
you fiddling with the scheduling parameters.  You should only run
programs that have been carefully written to do real-time correctly in
real-time mode, and nothing else.  Other programs may or may not hog
all available CPU time, and thereby hang your machine.

        <b

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Let us pray:
What a Great System.
Please Do Not Crash.