Method of using the UNIX physio to allow data to be transferred

Details Method of using the UNIX physio to allow data to be transferred Method of using the UNIX physio to allow data to be transferred

1997-03-17

1999-08-17

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

710 20, 714 11, G06F 1300, G06F 1314

Patent

active

059387432

ABSTRACT:
In the UNIX Operating System, modifying the kernel routine Physio, to enable a single system call to set up a number of concurrent direct memory access (DMA) channels between memory and the data buffers of a device. Many character device drivers use the UNIX Physio facility for I/O. The traditional implementation of Physio handles I/O in a serial manner by performing gather-write or scatter-read operations. This invention is an enhancement to Physio to support parallel I/O operations.

REFERENCES:
patent: 5179666 (1993-01-01), Rimmer et al.
patent: 5251322 (1993-10-01), Doyle et al.
patent: 5289581 (1994-02-01), Berenguel et al.
patent: 5481706 (1996-01-01), Peek
patent: 5758182 (1998-05-01), Rosenthal et al.

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