Abstract: Systems and methods for computing with multiple nodes. In some embodiments, a method includes: executing, by a first node of a plurality of nodes, a global load from a first address of a shared memory, the shared memory being shared by the nodes, the first address being an address within a shared memory section of a second node, the first address being cached in a first cache of the first node, the executing including: fetching a value stored in the shared memory, at the first address.

Abstract: Systems and methods for computing with multiple nodes. In some embodiments, a method includes writing, during each of a sequence of time steps, by each node of a plurality of nodes, to a shared memory, the shared memory being shared by the nodes, wherein: each of the nodes includes a hardware-maintained coherence domain and is connected to the other nodes, and each of the nodes includes a respective portion of the shared memory.

Abstract: Systems and methods for computing with multiple nodes. In some embodiments, a method includes: executing, by a first node of a plurality of nodes, a global clean, the executing including: determining that a first cached value in a cache of the first node is a modified cached copy of data in a shared memory, the shared memory being shared by the nodes; and in response to determining that the first cached value is a modified cached copy of data in the shared memory, writing back the first cached value to the shared memory.

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to relocate a compute thread, the apparatus comprising control circuitry to maintain a location of a plurality of domain access counters associated with a plurality of compute-memory domains for a first compute thread, and an execution monitor to set a first domain access counter of the plurality of domain access counters, the first domain access counter associated with a first compute-memory domain of the compute-memory domains, and relocate the first compute thread to a second compute-memory domain of the compute-memory domains in response to a comparison between a second domain access counter associated with the second compute-memory domain and the first domain access counter.

Abstract: A system and method for address translation in a multi-node computing system. In some embodiments, the system includes a first node. The first node may include: a core; and a global address translation circuit, the core including: a core processing circuit; and a memory management unit configured to map local virtual addresses to global virtual addresses, the global address translation circuit being configured to map global virtual addresses to global physical addresses.

Abstract: A computing node in a multi-node computing system includes a local memory, at least one processor, and an access library. The at least one processor runs an operating system that runs a distributed application in a virtual address space. The application includes a process that generates a first memory access request that includes a first virtual address. The access library is responsive to the first memory access request by: converting the first virtual address into a first physical address, accessing the local memory based on the first physical address including a first indication that the first memory access request is for the local memory, and accessing a global access tuple table based on the first physical address including a second indication that the first memory access request is for memory located on a second computing node of the multi-node computing system that is remotely located from the computing node.

Abstract: A method to address memory in nodes of a distributed memory system includes partitioning the memory in each node into one or more memory blocks available for a global memory pool. The method also includes combining, in response to a request to address memory in the global memory pool, a global bit from a global page table with a physical address to generate a global virtual address. The global bit indicates whether the memory is local or remote. The method also includes translating, using global access tuple (GAT) tables, the global virtual address to a global physical address, and addressing a memory block in the global memory pool based on the global physical address.

Abstract: Systems and methods for computing with multiple nodes. In some embodiments, a method includes: reading, by a first node of a plurality of nodes, from a shared memory shared by the nodes, a first data value; modifying, by the first node, the first data value; storing, by the first node, the modified first data value in a cache of the first node; initiating, by the first node, a global synchronization command; and in response to the initiating, by the first node, of the global synchronization command: indicating, by the first node, that the first node has completed a time step synchronization.

Abstract: A method of migrating threads across a first node running a first operating system and a second node running a second operating system that is a different instance than the first operating system. The method includes a task of receiving, by a thread daemon of the first node, a request from a process on the first node to migrate a thread of the process to the second node. The method also includes a task of sending, by the thread daemon of the first node, the request to a thread daemon of the second node, a task of creating, by the thread daemon of the second node, a thread entry in a thread proxy of the second node and a proxy process on the second node, and a task of instantiating the thread within the proxy process.

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to relocate a compute thread, the apparatus comprising control circuitry to maintain a location of a plurality of domain access counters associated with a plurality of compute-memory domains for a first compute thread, and an execution monitor to set a first domain access counter of the plurality of domain access counters, the first domain access counter associated with a first compute-memory domain of the compute-memory domains, and relocate the first compute thread to a second compute-memory domain of the compute-memory domains in response to a comparison between a second domain access counter associated with the second compute-memory domain and the first domain access counter.