Optimizing dirty page copying for a workload received during live migration that makes use of hardware accelerator virtualization

A computer system comprising:

• one or more processors;
• a first hardware accelerator;
• and
• a machine-readable medium, coupled to the one or more processors, having stored therein instructions, which when executed by the one or more processors cause a hardware (HW) status manager to:
• while performing a live migration of a source virtual machine (VM) running on the computer system to a destination VM, identify a new workload targeting a virtual function (VF) of the first HW accelerator by trapping a workload submission channel through which HW accelerator workloads are submitted to the VF;
• based on a nature of the new workload, determining, whether to transfer the new workload to a destination host on which the destination VM is running;
• and
• after an affirmative determination, causing the new workload to be submitted to a VF of a second HW accelerator of the destination host by incorporating information regarding the new workload within a migration stream of the live migration.

A non-transitory machine-readable medium storing instructions, representing a hardware (HW) status manager, which when executed by one or more processors of a source host cause the hardware (HW) status manage to:

• while performing a live migration of a source virtual machine (VM) running on the source host to a destination VM of a destination host, identify a new workload targeting a virtual function (VF) of a first HW accelerator of the source host by trapping a workload submission channel through which HW accelerator workloads are submitted to the VF;
• based on a nature of the new workload, determine whether to transfer the new workload to the destination host;
• and
• after an affirmative determination, cause the new workload to be submitted to a VF of a second HW accelerator of the destination host by incorporating information regarding the new workload within a migration stream associated with the live migration.

A method comprising:

• while performing a live migration of a source virtual machine (VM) running on a source host to a destination VM of a destination host, identifying, by a hardware (HW) status manager of the source host, a new workload targeting a virtual function (VF) of a first HW accelerator of the source host by trapping a workload submission channel through which HW accelerator workloads are submitted to the VF;
• based on a nature of the new workload, determining, by the HW status manager, to transfer the new workload to a destination host on which the destination VM is running;
• and
• causing the new workload to be submitted to a VF of a second HW accelerator of the destination host by incorporating information regarding the new workload within a migration stream of the live migration.