Method and apparatus for reducing the disk drive data transfer interrupt service latency penalty
AssigneeIntel Corporation
InventorsAmber D. Huffman, Knut S. Grimsrud
Life of this patent
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Abstract
A method and apparatus for reducing the disk drive data transfer interrupt service latency penalty is described. The method comprises beginning a data transfer between a disk drive and a host system, issuing an interrupt before the transfer is complete, and then completing the data transfer. This method may be implemented on a computer assembly that includes a processor, an input/output controller, and a scatter/gather list, which is stored in memory, that includes an entry that will cause the input/output controller to generate the interrupt.
Claims2
A method for reducing the disk drive data transfer interrupt service latency Penalty comprising:
- beginning a data transfer between a disk drive and a host system;
- issuing an interrupt before the transfer is complete;
- and
- completing the data transfer,
- wherein the time required for the interrupt to reach a device driver is approximately equal to the time required to complete the data transfer after the interrupt is issued.
A computer program stored on a computer readable medium for reducing the disk drive data transfer interrupt service latency penalty, the computer program comprising instructions that cause a computer to
- begin a data transfer between a disk drive and a host system;
- issue an interrupt before the transfer is complete;
- and
- complete the data transfer,
- wherein the instructions ensure that the time required for the interrupt to reach a device driver is approximately equal to the time required to complete the data transfer after the interrupt is issued.
Dependencies are inferred from the claim text.