The Role Of The 1130 Hardware; General - IBM 1130 User Manual

THE ROLE OF THE 1130 HARDWARE
General
The last component in the user/hardware/software
trio is the 1130 hardware itself. Because this sec-
tion is concerned primarily with increasing perform-
ance, the discussion will concentrate on the ways
you can improve throughput by the use of alterna-
tive hardware configurations.
The first step is the separation of run time into
four basic elements:
1. Productive time that cannot be improved by
hardware changes
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2.
Productive time that can be improved by
hardware changes
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3. Nonproductive time that cannot be improved
by hardware changes
4. Nonproductive time that can be improved by
hardware changes
The third is included only for completeness; using
the definitions, there are no meaningful items to dis-
cuss in this area.
Productive time is the time that the 1130 occupies
itself doing something you wantitto do. Nonproduc-
tive time applies to activities that may be necessary,
but that are unproductive from your point of view.
Some examples of the latter are disk seeks, reading
LOCAL and SOCAL overlays, etc.