ipu_config.json

{
    "recompute_checkpoint_every_layer": true,
    "optimizer_state_offchip": true,
    "replicated_tensor_sharding": true,
    "enable_half_first_order_momentum": true,
    "enable_half_partials": true,
  
    "replication_factor": 4,
    "gradient_accumulation_steps": 16,
    "device_iterations": 1,
    "executable_cache_dir": "./exe_cache",

    "inference_device_iterations": 4,
    "inference_replication_factor": 4,
  
    "ipus_per_replica": 4,
    "layers_per_ipu": [3, 3, 3, 3],
    "matmul_proportion": [0.3]
  }