  The CP-PACS is a massively parallel MIMD computer with the theoretical peak
speed of 614 GFLOPS which has been developed for computational physics
applications at the University of Tsukuba, Japan. We report on the performance
of the CP-PACS computer measured during recent production runs using our
Quantum Chromodynamics code for the simulation of quarks and gluons in particle
physics. With the full 2048 processing nodes, our code shows a sustained speed
of 237.5 GFLOPS for the heat-bath update of gluon variables, 264.6 GFLOPS for
the over-relaxation update, and 325.3 GFLOPS for quark matrix inversion with an
even-odd preconditioned minimal residual algorithm.
