Description for benchmarks in LEF/DEF format
ibmxx.lefLEF file (4 routing layers)
ibmxx-5l.lef LEF file (5 routing layers)
ibmxx-trn-pp.def DEF file (n tracks between rows, pp% row utilization)
pconfig-trn-ppconfig file for Cadence QPlace and Dragon
rconfig-trn-ppconfig file for Cadence WRoute

Run Dragon:
dragon -q pconfig-trn-pp -fd [-dis]