# Poster presented by Thomas Lippert

**Poster Session**
**Topic:** QCD Spectrum and Quark Masses

### About the Costs of Simulating two Flavour QCD in the Deep Chiral Regime

**Abstract:** Based on hadron mass data, convergence rates of iterative solvers, autocorrelation times, dynamical critical exponents and code performances as measured by the SESAM/TXL hybrid Monte Carlo runs available at the lattice spacing $a = 0.079$ fm, we construct a cost scaling formula to prognosticate the computer time needed for producing full QCD vacuum configurations with $N_f = 2$ Wilson fermions when extending the presently accessible $m_{pi}/m_{rho}$ range deeper into the chiral regime. We propose a strategy to go along cost optimal trajectories in the $L-a$ plane.

Massimo Campostrini,
`campo@mailbox.difi.unipi.it`