Mechanism for minimizing overhead usage of a host system by poll

Details Mechanism for minimizing overhead usage of a host system by poll Mechanism for minimizing overhead usage of a host system by poll

1998-10-16

2000-08-15

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Interrupt processing

Multimode interrupt processing

710260, 710264, 710265, 710266, 710267, 710220, 710 41, 710 48, 710 52, 710 56, 712 10, 712 11, 712 14, 712 15, 712 20, 327142, 380 4, 380 24, G06F 1324

Patent

active

061051020

ABSTRACT:
An apparatus and method minimizes processing resource of a host system during service of interrupts generated closely in time by at least one peripheral device. The present invention determines, before the end of a prior interrupt service routine for a prior interrupt, a predicted interrupt time point when a subsequent interrupt will be generated by the at least one peripheral device. The host system operates in a polling mode if the predicted interrupt time point is before a predetermined time period after the end of the prior interrupt service routine. Thus, the host system avoids the processing resources needed for context switching time when the subsequent interrupt is generated closely in time from the prior interrupt. The host system operates in an interrupt mode if the predicted interrupt time point is after the predetermined time period after the end of the prior interrupt service routine. Thus, the host system returns to the foreground task as soon as possible when the subsequent interrupt is not generated sufficiently close in time from the prior interrupt.

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