code: def trace(
      service_addr,
      logdir,
      duration_ms,
      worker_list="",
      num_tracing_attempts=3,
      options=None,
  ):
      """Sends gRPC requests to one or more profiler servers to perform on-demand profiling.
  
      This method will block the calling thread until it receives responses from all
      servers or until deadline expiration. Both single host and multiple host
      profiling are supported on CPU, GPU, and TPU.
      The profiled results will be saved by each server to the specified TensorBoard
      log directory (i.e. the directory you save your model checkpoints). Use the
      TensorBoard profile plugin to view the visualization and analysis results.
  
      Args:
        service_addr: A comma delimited string of gRPC addresses of the workers to
          profile.
          e.g. service_addr='grpc://localhost:6009'
               service_addr='grpc://10.0.0.2:8466,grpc://10.0.0.3:8466'
               service_addr='grpc://localhost:12345,grpc://localhost:23456'
        logdir: Path to save profile data to, typically a TensorBoard log directory.
          This path must be accessible to both the client and server.
          e.g. logdir='gs://your_tb_dir'
        duration_ms: Duration of tracing or monitoring in milliseconds. Must be
          greater than zero.
        worker_list: An optional TPU only configuration. The list of workers to
          profile in the current session.
        num_tracing_attempts: Optional. Automatically retry N times when no trace
          event is collected (default 3).
        options: profiler.experimental.ProfilerOptions namedtuple for miscellaneous
          profiler options.
  
      Raises:
        InvalidArgumentError: For when arguments fail validation checks.
        UnavailableError: If no trace event was collected.
  
      Example usage (CPU/GPU):
  
      ```python
        # Start a profiler server before your model runs.
        tf.profiler.experimental.server.start(6009)
        # (Model code goes here).
        # Send gRPC request to the profiler server to collect a trace of your model.
        tf.profiler.experimental.client.trace('grpc://localhost:6009',
                                              '/nfs/tb_log', 2000)
      ```
  
      Example usage (Multiple GPUs):
  
      ```python
        # E.g. your worker IP addresses are 10.0.0.2, 10.0.0.3, 10.0.0.4, and you
        # would like to schedule start of profiling 1 second from now, for a
        # duration of 2 seconds.
        options['delay_ms'] = 1000
        tf.profiler.experimental.client.trace(
            'grpc://10.0.0.2:8466,grpc://10.0.0.3:8466,grpc://10.0.0.4:8466',
            'gs://your_tb_dir',
            2000,
            options=options)
      ```
  
      Example usage (TPU):
  
      ```python
        # Send gRPC request to a TPU worker to collect a trace of your model. A
        # profiler service has been started in the TPU worker at port 8466.
        # E.g. your TPU IP address is 10.0.0.2 and you want to profile for 2 seconds
        # .
        tf.profiler.experimental.client.trace('grpc://10.0.0.2:8466',
                                              'gs://your_tb_dir', 2000)
      ```
  
      Example usage (Multiple TPUs):
  
      ```python
        # Send gRPC request to a TPU pod to collect a trace of your model on
        # multiple TPUs. A profiler service has been started in all the TPU workers
        # at the port 8466.
        # E.g. your TPU IP addresses are 10.0.0.2, 10.0.0.3, 10.0.0.4, and you want
        # to profile for 2 seconds.
        tf.profiler.experimental.client.trace(
            'grpc://10.0.0.2:8466',
            'gs://your_tb_dir',
            2000,
            '10.0.0.2:8466,10.0.0.3:8466,10.0.0.4:8466')
      ```
  
      Launch TensorBoard and point it to the same logdir you provided to this API.
  
      ```shell
        # logdir can be gs://your_tb_dir as in the above examples.
        $ tensorboard --logdir=/tmp/tb_log
      ```
  
      Open your browser and go to localhost:6006/#profile to view profiling results.
  
      """
      if duration_ms <= 0:
          raise errors.InvalidArgumentError(
              None, None, "duration_ms must be greater than zero."
          )
  
      opts = dict(options._asdict()) if options is not None else {}
      _pywrap_profiler.trace(
          _strip_addresses(service_addr, _GRPC_PREFIX),
          logdir,
          worker_list,
          True,
          duration_ms,
          num_tracing_attempts,
          opts,
      )
  
imports: from tensorflow.python.framework import errors
  from tensorflow.python.profiler.internal import _pywrap_profiler
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 1 for calling a global function with example usage: trace(service_addr, logdir, duration_ms, worker_list, num_tracing_attempts, options) without return types