child's performance is recorded and the oldest model from is discarded. This process is repeated for cycles. There are two main mutations used in the mutation step: hidden state mutation and the operation hidden state is picked at random and is replaced with another hidden state in the cell such that no cycles are created. For operation mutation, a primitive operation in the block is replaced with a randomly

pytorch -c pytorch • Others via pip: pip3 install torch • ???????????? On Princeton CS server (ssh cycles.cs.princeton.edu) • Non-CS students can request a class account. • Miniconda is highly recommended

gist164。 表12.4.1: 常见延迟。 Action Time Notes L1 cache reference/hit 1.5 ns 4 cycles Floating‐point add/mult/FMA 1.5 ns 4 cycles continues on next page 159 https://aws.amazon.com/ec2/instance‐types/c5/ reference/hit 5 ns 12 ~ 17 cycles Branch mispredict 6 ns 15 ~ 20 cycles L3 cache hit (unshared cache) 16 ns 42 cycles L3 cache hit (shared in another core) 25 ns 65 cycles Mutex lock/unlock 25 ns L3 L3 cache hit (modified in another core) 29 ns 75 cycles L3 cache hit (on a remote CPU socket) 40 ns 100 ~ 300 cycles (40 ~ 116 ns) QPI hop to a another CPU (per hop) 40 ns 64MB memory ref. (local CPU)