Method and device for hot upgrading virtual machine

An electronic device, comprising:

• a processor;
• and
• a memory, wherein the memory stores computer-executable instructions;
• and
• the processor executes the computer-executable instructions stored in the memory, to cause the processor to:
• create a quick emulator (QEMU) component corresponding to an individual virtual machine on a data processing unit (DPU), wherein the QEMU component comprises a plurality of sub-threads, each of the sub-threads in the QEMU component is in a one-to-one correspondence with a virtual central processing unit (VCPU) thread on a physical machine, and a sub-thread in the QEMU component is configured to receive and process an input/output (IO) request sent by a corresponding VCPU thread;
• create a new QEMU component corresponding to a target virtual machine on the DPU in response to a hot upgrade instruction for a target QEMU component corresponding to the target virtual machine;
• pause the target QEMU component on the DPU, save state information of each sub-thread in the target QEMU component, and synchronize state information of each sub-thread to the new QEMU component;
• and
• receive and process, through the new QEMU component, the IO request sent by the VCPU thread.

A non-transitory computer-readable storage medium, storing computer-executable instructions which, when executed by a processor, cause the processor to:

• create a quick emulator (QEMU) component corresponding to an individual virtual machine on a data processing unit (DPU), wherein the QEMU component comprises a plurality of sub-threads, each of the sub-threads in the QEMU component is in a one-to-one correspondence with a virtual central processing unit (VCPU) thread on a physical machine, and a sub-thread in the QEMU component is configured to receive and process an input/output (IO) request sent by a corresponding VCPU thread;
• create a new QEMU component corresponding to a target virtual machine on the DPU in response to a hot upgrade instruction for a target QEMU component corresponding to the target virtual machine;
• pause the target QEMU component on the DPU, save state information of each sub-thread in the target QEMU component, and synchronize state information of each sub-thread to the new QEMU component;
• and
• receive and process, through the new QEMU component, the IO request sent by the VCPU thread.