PyTorchProfiler

class lightning.pytorch.profilers.PyTorchProfiler(dirpath=None, filename=None, group_by_input_shapes=False, emit_nvtx=False, export_to_chrome=True, row_limit=20, sort_by_key=None, record_module_names=True, table_kwargs=None, **profiler_kwargs)

Bases: Profiler

This profiler uses PyTorch’s Autograd Profiler and lets you inspect the cost of different operators inside your model - both on the CPU and GPU.

Parameters:

• dirpath (Union[str, Path, None]) – Directory path for the filename. If dirpath is None but filename is present, the trainer.log_dir (from TensorBoardLogger) will be used.

• filename (Optional[str]) – If present, filename where the profiler results will be saved instead of printing to stdout. The .txt extension will be used automatically.

• group_by_input_shapes (bool) – Include operator input shapes and group calls by shape.

• emit_nvtx (bool) –

  Context manager that makes every autograd operation emit an NVTX range Run:

  nvprof --profile-from-start off -o trace_name.prof -- <regular command here>
  

  To visualize, you can either use:

  nvvp trace_name.prof
  torch.autograd.profiler.load_nvprof(path)
  

• export_to_chrome (bool) – Whether to export the sequence of profiled operators for Chrome. It will generate a .json file which can be read by Chrome.

• row_limit (int) – Limit the number of rows in a table, -1 is a special value that removes the limit completely.

• sort_by_key (Optional[str]) – Attribute used to sort entries. By default they are printed in the same order as they were registered. Valid keys include: cpu_time, cuda_time, cpu_time_total, cuda_time_total, cpu_memory_usage, cuda_memory_usage, self_cpu_memory_usage, self_cuda_memory_usage, count.

• record_module_names (bool) – Whether to add module names while recording autograd operation.

• table_kwargs (Optional[Dict[str, Any]]) – Dictionary with keyword arguments for the summary table.

• **profiler_kwargs (Any) – Keyword arguments for the PyTorch profiler. This depends on your PyTorch version

Raises:

MisconfigurationException – If arg sort_by_key is not present in AVAILABLE_SORT_KEYS. If arg schedule is not a Callable. If arg schedule does not return a torch.profiler.ProfilerAction.

start(action_name)

Defines how to start recording an action.

Return type:

None

stop(action_name)

Defines how to record the duration once an action is complete.

Return type:

None

teardown(stage)

Execute arbitrary post-profiling tear-down steps.

Closes the currently open file and stream.

Return type:

None