Losing interrupts?

Michael Grenier mike at cimcor.mn.org
Thu Oct 6 12:42:09 AEST 1988


>From article <1905 at van-bc.UUCP>, by sl at van-bc.UUCP (pri=-10 Stuart Lynne):
! For example one of the basic differences between SCO 386 and the SysV 386 
! products is the priority of the interrupts.
! 
! 	SCO			SysV
!   SPL7	Serial		SPL7	Clock
!   SPL6	Clock		SPLTTY	Serial
! 
! SysV allows the clock interrupt to take over the machine at a higher
! priority level than (for example) the serial interrupts.

I don't think so. Microport has the serial interrupts at SPL7 (the
highest) and the clock at the lowest (which is probably why the
clock loses time!). In fact, I doubt Microport is losing that
many interrupts on the serial lines until the entire system
gets too loaded which doesn't take that much  with the overhead 
being incurred.

    -Mike Grenier
    mike at cimcor.mn.org
    uunet!rosevax!cimcor!mike



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