Computer system and process execution method

A process execution method of causing a computer system to execute a process, the computer system including a memory, a plurality of processor cores coupled to the memory, and a storage device coupled to the plurality of processor cores,

• the process execution method comprising:
• storing, in the memory, a storage control program which causes at least one of the plurality of processor cores to execute a storage control process in which an I/O is executed with respect to the storage device in accordance with an I/O request, an application program which causes at least one of the plurality of processor cores to execute an application process in which the I/O request is issued, and an execution control program which causes at least one of the plurality of processor cores to execute execution control in which at least one of the plurality of processor cores is allocated to each of the storage control process and the application process;
• implementing the execution control to cause a processor core allocated to the storage control process to be occupied by the storage control process;
• implementing the execution control to cause a processor core allocated to the application process to be shared with another process;
• and
• implementing the execution control to change the number of processor cores allocated to the storage control process, based on I/O information indicating a state of the I/O.