Network performance estimating device, network performance estimating method and storage medium having a network performance estimating program stored therein

A network performance estimating method for controlling a network performance estimating device for estimating network performance of a parallel computing machine including a plurality of calculation nodes and a storing unit that stores design information defining a simulation target network including a plurality of simulation target calculation nodes, the network performance estimating method comprising:

• executing a plurality of parallel processes by the plurality of calculation nodes, wherein each of the plurality of processes communicates with another process in another of the plurality of calculation nodes;
• obtaining one or more message passing interface (MPI) packets, including communication data output, from one of the plurality of calculation nodes when the plurality of processes are executed by the plurality of calculation nodes, each MPI packet further including a header containing information of a calculation time which is required for a calculation to output the communication data;
• referring to the design information stored in the storing unit;
• executing a communication simulation by specifying an output timing of the obtained communication data using information of the calculation time obtained from the one or more MPI packets, and executing the communication simulation based on the specified output timing;
• storing a simulation result of the simulation target network in the storage unit on the basis of a result of the executed communication simulation;
• and
• transmitting the obtained communication data to others of the plurality of calculation nodes.

A non-transitory computer readable storage medium storing a network performance estimating program directing a computer to perform a process for estimating network performance of a parallel computing machine including a plurality of calculation nodes and a storing unit that stores design information defining a simulation target network including a plurality of simulation target calculation nodes, the process comprising:

• executing a plurality of parallel processes using the plurality of calculation nodes, wherein each of the plurality of processes communicates with another process in another of the plurality of calculation nodes;
• obtaining one or more message passing interface (MPI) packets, including communication data output, from one of the plurality of calculation nodes when the plurality of processes are executed by the plurality of calculation nodes, each MPI packet further including a header containing information of a calculation time which is required for a calculation to output the communication data;
• referring to the design information stored in the storing unit;
• executing a communication simulation by specifying an output timing of the obtained communication data using information of the calculation time obtained from the one or more MPI packets, and executing the communication simulation based on the specified output timing;
• storing a simulation result of the simulation target network in the storage unit on the basis of a result of the executed communication;
• and
• transmitting the obtained communication data to others of the plurality of calculation nodes.