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Abstract
This white paper presents an efficient “N buffer
scheme” to manage I/O in a real-time system like
an audio decoder. In general, this N buffer scheme (N
> 2) can be applied to any program or a process whose
average CPU load is much smaller than its peak CPU load.
The 2-buffer ‘pingpong’ approach, which is
a special case of “N buffer scheme”, is applicable
to general programming tasks, independent of the CPU
load profile. Towards the end of the paper, it is shown
that the “N buffer scheme” is memory efficient
as compared to a single/dual buffer solution, without
a performance penalty (i.e., without affecting the CPU
load). Alternatively, for a given memory size, the “N
buffer scheme” puts lesser load on CPU as compared
to a single/ dual buffer solution.
Author
Rupesh W Kumbhare
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