Appeal 2007-2127
Reexamination Control No. 90/006,621
multiple processes), and how threads are dispatched is illustrated in LaFore,
Peter Norton's Inside OS/2, pages 138-39:
Threads are referred to as the "unit of dispatchability." This means
the scheduler allots CPU time to threads, not processes. Each thread
gets its share of time before control is passed to the next thread. Thus,
a process with more threads will get more CPU time, as shown in
Figure 5-2.
Process 1 and Process 2 are each "multithreaded" because they have
two or more threads in the same process executing at the same time but for
the timesharing of the CPU. Also, since two processes execute at the same
time, but for the timesharing of the CPU, this is multitasking of processes.
m. Advantages of multithreading
There are numerous advantages to multitasking and multithreading.
As stated in Harvey M. Deitel, An Introduction to Operating Systems (2d ed.
Addison-Wesley Feb. 1990), page 791:
Programmers in an OS/2 environment use threads for a variety
of reasons. A common application is to provide one thread for
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