Connecting processors using twisted torus configurations

A system comprising:

• one or more computers;
• and
• one or more computer-readable media storing instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising:
• providing an interface for requesting access to a cluster of processing nodes over a communication network, wherein the processing nodes are coupled using a reconfigurable interconnect fabric;
• receiving, over the communication network and through the interface, a request from each of multiple remote devices;
• allocating different subsets of the processing nodes in the cluster for separate networks based on the requests, wherein each of the networks includes a different subset of the processing nodes in the cluster, wherein allocating the different subsets of the processing nodes in the cluster for separate networks comprises, for each of the requests:
• determining, based on the request, (i) a number of processing nodes within the cluster to allocate in a network that is formed in response to the request and (ii) a topology to be created in the network that is formed in response to the request;
• selecting an interconnection scheme for the network, wherein the interconnection scheme is selected from a group that includes at least a torus interconnection scheme and a twisted torus interconnection scheme;
• allocating a subset of the processing nodes comprising the determined number of processing nodes, wherein the network provides the allocated subset of processing nodes in the determined topology;
• and
• altering connections in the reconfigurable interconnect fabric to establish data links among the processing nodes that provide the selected interconnection scheme for the processing nodes in the network;
• and
• providing, to each of the remote devices, access to one of the allocated networks that was allocated in response to the request from the remote device, wherein the allocated networks are configured to separately and concurrently perform computing tasks requested by the corresponding remote devices.

One or more non-transitory computer-readable media storing instructions that are operable, when executed by one or more computers, to cause the one or more computers to perform operations comprising:

• providing an interface for requesting access to a cluster of processing nodes over a communication network, wherein the processing nodes are coupled using a reconfigurable interconnect fabric;
• receiving, over the communication network and through the interface, a request from each of multiple remote devices;
• allocating different subsets of the processing nodes in the cluster for separate networks based on the requests, wherein each of the networks includes a different subset of the processing nodes in the cluster, wherein allocating the different subsets of the processing nodes in the cluster for separate networks comprises, for each of the requests:
• determining, based on the request, (i) a number of processing nodes within the cluster to allocate in a network that is formed in response to the request and (ii) a topology to be created in the network that is formed in response to the request;
• selecting an interconnection scheme for the network, wherein the interconnection scheme is selected from a group that includes at least a torus interconnection scheme and a twisted torus interconnection scheme;
• allocating a subset of the processing nodes comprising the determined number of processing nodes, wherein the network provides the allocated subset of processing nodes in the determined topology;
• and
• altering connections in the reconfigurable interconnect fabric to establish data links among the processing nodes that provide the selected interconnection scheme for the processing nodes in the network;
• and
• providing, to each of the remote devices, access to one of the allocated networks that was allocated in response to the request from the remote device, wherein the allocated networks are configured to separately and concurrently perform computing tasks requested by the corresponding remote devices.