Device and method with computing-system performance simulation

A computing device for simulating a computing system, the computing device comprising:

• a memory storing instructions;
• and
• one or more processors configured to execute the instructions,
• wherein the instructions, when executed by the one or more processors, cause the computing device to:
• convert a first task assigned to simulated hardware having a first configuration of the simulated computing system into a second task, wherein the first task requires a first scale and a first degree of parallelism and the second task requires a second scale that is less than the first scale and a second degree of parallelism that is less than the first degree of parallelism;
• obtain a probability of the simulated hardware having the first configuration succeeding in a requested event, the obtaining performed by executing a simulation in which simulated hardware having a second configuration that is smaller than the simulated hardware having the first configuration processes the second task;
• and
• based on the probability, based on the first scale of the first task, and based on parameter information of the simulated hardware having the first configuration, predict a statistical performance index of the simulated hardware having the first configuration when the simulated hardware having the first configuration processes the first task.