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": {"pod4": 1, "pod8": 2, "pod16": 4, "pod32": 8, "pod64": 16, "pod128": 32, "pod256": 64, "default": 1},
    "gradient_accumulation_steps": 512,
    "device_iterations": 1,
    "executable_cache_dir": "./exe_cache",

    "inference_device_iterations": 4,
    "inference_replication_factor": {"pod4": 1, "pod8": 2, "pod16": 4, "pod32": 8, "pod64": 16, "pod128": 32, "pod256": 64, "default": 1},
    "ipus_per_replica": 4,
    "layers_per_ipu": [0, 4, 4, 4],
    "matmul_proportion": [0.25, 0.25, 0.25, 0.25]
  }