The LINPACKbenchmark program, running on the part of the system that employs 68, 544 CPUs installed on the K computer being configured, recorded the world's top performance of 8.162 petaflops.
To test the system's performance at the configuration stage, the K computer's processing speed was measured by the LINPACKbenchmark program, placing it on the 37th TOP500 ranking of the world's fastest supercomputers.
This half-build system achieved the world's best LINPACK(2) benchmark performance of 8.162 petaflops (quadrillion floating-point operations per second), to place it at the head of the TOP500 list.
He suspects some of the listings were submitted by vendors who ran Linpack (the standard code used to measure supercomputing performance) benchmark before delivering the systems to their customers and then submitted those systems for the list without telling their customers.