Multi-gpu device pcie topology retrieval in guest vm

A method comprising:

• executing, by circuitry of a processor, a guest VM that utilizes a first hardware topology;
• generating, by the circuitry, a request for latency information between pairs of endpoint devices based on a second hardware topology different from the first hardware topology;
• sending, by the circuitry, the request to a topology manager;
• and
• in response to receiving a response from the topology manager comprising the latency information, scheduling, by the circuitry, tasks on endpoint devices of the first hardware topology based on the latency information.

A computing system comprising:

• a memory configured to store instructions of one or more tasks and source data to be processed by the one or more tasks;
• a plurality of endpoint devices;
• and
• a processor of a given endpoint device configured to:
• execute the instructions using the source data;
• execute a guest virtual machine (VM) that utilizes a first hardware topology;
• generate a request for latency information between pairs of endpoint devices of the plurality of endpoint devices based on a second hardware topology different from the first hardware topology;
• send the request to a topology manager;
• and
• in response to receiving a response from the topology manager comprising the latency information, schedule tasks on the plurality of endpoint devices based on the latency information.