Method and system for optimizing DMA channel selection

A system that allows a host computing system to communicate with plural devices over a network, comprising:

• a host bus adapter including a direct memory access (“DMA”)mode detection module that receives a DMA channel identifier information from an arbitration module that receives requests from plural DMA channels, wherein the DMA mode detection module includes a DMA counter that counts a number of times a single DMA channel is exclusively serviced by the arbitration module and if the DMA counter value is equal to a threshold value, then the DMA mode detection module enables a single channel mode during which standard transaction rules are ignored for determining DMA request lengths for transferring data.

A host computing system that can communicate with plural devices over a network, comprising:

• a host bus adapter operationally coupled to the host computing system includes a direct memory access (“DMA”)mode detection module that receives a DMA channel identifier information from an arbitration module that receives requests from plural DMA channels, wherein the DMA mode detection module includes a DMA counter that counts a number of times a single DMA channel is exclusively serviced by the arbitration module and if the DMA counter value is equal to a threshold value, then the DMA mode detection module enables a single channel mode during which standard transaction rules are ignored for determining DMA request lengths for transferring data.

A method for transferring data between a host computing system and plural devices using a host bus adapter (“HBA”) coupled to a network, comprising:

• determining if a same direct memory access (“DMA”) channel in the HBA has been exclusively serviced for a certain duration;
• and
• enabling a single channel mode during which standard transaction rules are ignored for determining DMA request lengths for transferring data between the host computing system and the plural devices.