Patent ID: 8990450
Filing Date: 2015-03-24
Classification: G06F

Abstract:
1. A method of managing a direct memory access (‘DMA’) injection first-in-first-out (‘FIFO’) messaging queue in a parallel computer, the method comprising: inserting, by a messaging unit management module, a DMA message descriptor into the injection FIFO messaging queue; determining, by the messaging unit management module, the number of extra slots in an immediate messaging queue required to store DMA message data associated with the DMA message descriptor inserted into the injection FIFO messaging queue, including: responsive to determining that the number of extra slots in the immediate message queue required to store the DMA message data is greater than one, inserting, by the messaging unit management module, a number of DMA dummy message descriptors into the injection FIFO messaging queue, wherein the number of DMA dummy message descriptors is at least as many as the number of extra slots in the immediate messaging queue that are required to store the DMA message data.