defective STT-RAM lines. We measure this duration and use it
to estimate and analyze the lifetime. Figure 5b compares the
lifetime of the hybrid cache with baseline configurations. The
left column is the lifetime of fully STT-RAM cache with no
wear-leveling scheme normalized to lifetime of the hybrid
cache using the proposed management policies. Although
baseline has double L2 cache size, its lifetime is just 7.6% of
the hybrid structure for PARSEC-2 programs which results in
49.4 endurance enhancement for hybrid structure.