Method for performance analysis by extrapolation of a software application in a cluster of servers

A method (100) for the performance analysis of a software application by its execution in parallel on several computational nodes (12) of a cluster of reference servers (10) further comprising several storage nodes (16) and at least one interconnection network (18) of the computational (12) and storage (16) nodes together for the exchange of messages according to a predetermined message transmission protocol, with the method comprising:

• a first execution (104) of the software application by the cluster of servers (10) involving exchanges of data useful for its execution between the computational (12) and the storage (16) nodes of the cluster of servers (10) executed by the interconnection network (18) according to the predetermined protocol by encapsulating these useful data in messages of a predetermined size;
• a second execution (108) of the software application by the cluster of servers (10), involving the same exchanges of useful data between the same computational (12) and storage (16) nodes of the cluster of servers (10) executed by the same interconnection network (18) according to the same predetermined protocol;
• an extrapolation (114) of the performance of the software applications on the basis of at least one of the two executions:
• characterized in that:
• the predetermined size of the messages exchanged during the second execution (108) differs from that of the messages exchanged during the first execution (104) while the useful data exchanged are the same;
• and
• the extrapolation (114) of the performance of the software application comprises a simulation (116) of variation of the bandwidth of the interconnection network (18) based on the predetermined difference in size of the messages exchanged during the first and second execution (104, 108).