Atomic memory operations

A method comprising:

• receiving, by a first processor of a data processing unit (DPU) associated with a network interface controller (NIC), the first processor coupled to a first memory, an atomic memory operation (AMO) remote procedure call (RPC) comprising a memory address associated with a second memory associated with one or more host processors and an AMO type;
• retrieving a value corresponding to the memory address of the AMO RPC from at least one of the first memory or the second memory;
• performing, by the first processor, an AMO corresponding to the AMO type on the value from the second memory to obtain a modified value;
• and
• storing the modified value in the first memory.

A data processing unit (DPU) associated with a network interface controller (NIC), the DPU comprising processing circuitry to perform operations comprising:

• receiving an atomic memory operation (AMO) remote procedure call (RPC) comprising a memory address associated with an external memory associated with one or more host processors and an AMO type;
• retrieving a value corresponding to the memory address of the AMO RPC from at least one of a local memory or the external memory;
• performing an AMO corresponding to the AMO type on the value from the external memory to obtain a modified value;
• and
• storing the modified value in the local memory.

A datacenter comprising:

• a plurality of host computing devices interconnected via a plurality of switches, wherein one or more host computing devices of the plurality of host computing devices comprises:
• one or more host processors;
• a host memory associated with the one or more host processors;
• and
• a data processing unit (DPU) associated with a network interface controller (NIC), the DPU comprising an additional memory and one or more additional processors coupled to the additional memory, the one or more additional processors to:
• receive an atomic memory operation (AMO) remote procedure call (RPC) comprising a memory address associated with the host memory and an AMO type;
• retrieve a value corresponding to the memory address of the AMO RPC from at least one of the additional memory or the host memory;
• perform an AMO corresponding to the AMO type on the value from the host memory to obtain a modified value;
• and
• store the modified value in the additional memory.