Advanced Micro Devices Corporation

Vipin Jain

Rajshekhar Biradar

Raghava Sivaramu

Embodiments herein describe creating multiple packet fragments from a large data chunk that, for example, exceeds a maximum transmission unit (MTU) supported by a network. In one embodiment, a network interface controller or card (NIC) receives a direct memory access (DMA) from a connected host to transmit an IP packet or data using remote direct memory access (RDMA) technologies. The NIC can evaluate the data chunk associated with the DMA request and determine whether it exceeds the MTU for the network. Assuming it does, the NIC determines how many fragments to divide the data chunk into, and can fragment any portion of the data at flexible packet/payload offsets. The NIC can then retrieve the data chunk from host memory fragment-by-fragment, rather than reading the data chunk all at once, generating headers for the fragments, and then transmit them as packet fragments.

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Santa Clara, CA, United States of America

Vipin Jain