March 2007
Beginner
526 pages
13h 53m
English
book
Introduction to the New Mainframe: z/VSE Basics
by Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, G. M. (Jerry) Johnston, Wilhelm Mild, Ingolf Salm, Joerg Schmidbauer, Martin Walbruehl, Mike Ebbers
Content preview from Introduction to the New Mainframe: z/VSE Basics
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Chapter 3. z/VSE overview 99
specified program can compete for processor time and can use certain
resources already allocated to the partition.
z/VSE allocates up to 32 system tasks (system TCBs), which execute system
function, like services for I/O, page manager, fetch/load, or the dispatcher.
3.6.3 Preemptable versus non-preemptable
Which routine receives control after an interrupt is processed depends on
whether the interrupted unit of work was preemptable. If so, the operating system
determines which unit of work should be performed next. That is, the system
determines which unit or work, of all the work in the system, has the highest
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