Resource management method, host, and endpoint based on performance specification

A resource management method, comprising:

• associating, by a target endpoint, a target process to a virtual device in a set of one or more virtual devices disposed on the target endpoint, wherein the target process is allocated to the target endpoint by a first processor that is disposed in a first host, the target endpoint coupling the first processor and an Input/Output (I/O) resource pool;
• obtaining, by the target endpoint, a performance specification of the target process;
• adjusting, by the target endpoint, a performance parameter of the virtual device to obtain an adjusted virtual device, wherein the performance parameter is adjusted according to the performance specification of the target process and a performance specification of other processes which use the set of one or more virtual devices disposed on the target endpoint, wherein the adjusted virtual device satisfies a total requirement of performance specifications of all processes that use the set of one or more virtual devices disposed on the target endpoint, and wherein the total requirement is a summation of requirements for performance specifications of all processes that use the set of one or more virtual devices disposed on the target endpoint;
• receiving, by the target endpoint from the first processor, a resource access request of the target process;
• obtaining, by the target endpoint based on the resource access request, access to a resource from the I/O resource pool that meets the performance specification of the target process;
• and
• providing, by the target endpoint, access to the resource obtained from the I/O resource pool to the target process;
• wherein the method further comprises migrating a first process to a second host, the second host comprising a second processor, a second endpoint, and a second I/O resource pool, the migrating comprising:
• sending, by the first processor, a first performance specification of the first process to the second processor;
• sending, by the second processor, the first performance specification to the second endpoint;
• generating, by the second endpoint, a second virtual device, wherein the second virtual device satisfies the first performance specification;
• sending, by the first processor, description information of the first process to the second processor, and generating, by the second processor, a second process that satisfies the first performance specification according to the description information;
• sending, by the second processor, a second resource access request of the second process for the second virtual device to the second endpoint when the second process needs to access a resource;
• after receiving the second resource access request, obtaining, by the second endpoint, a second resource from the second I/O resource pool according to the first performance specification;
• providing, by the second endpoint, access to the second resource obtained from the I/O resource pool to the second process.