add warmup steps to throughput logger (#840)

Summary:
Pull Request resolved: #840

Adding warmup steps to different performance loggers

Reviewed By: diego-urgell

Differential Revision: D57596034

fbshipit-source-id: ceeb60ae08b7bae33f69525816407f36d0510bfc

tests/framework/callbacks/test_throughput_logger.py

@@ -32,7 +32,7 @@
 class ThroughputLoggerTest(unittest.TestCase):
     def test_maybe_log_for_step(self) -> None:
         logger = MagicMock(spec=MetricLogger)
-        throughput_logger = ThroughputLogger(logger, {"Batches": 1, "Items": 32}, 1)
+        throughput_logger = ThroughputLogger(logger, {"Batches": 1, "Items": 32})
         phase_state = PhaseState(dataloader=[])
         phase_state.iteration_timer.recorded_durations = {
             "data_wait_time": [1, 4],
@@ -75,7 +75,7 @@ def test_maybe_log_for_step(self) -> None:
 
     def test_maybe_log_for_step_early_return(self) -> None:
         logger = MagicMock(spec=MetricLogger)
-        throughput_logger = ThroughputLogger(logger, {"Batches": 1}, 1)
+        throughput_logger = ThroughputLogger(logger, {"Batches": 1})
         phase_state = PhaseState(dataloader=[])
         recorded_durations_dict = {
             "data_wait_time": [0.0, 4.0],
@@ -101,7 +101,9 @@ def test_maybe_log_for_step_early_return(self) -> None:
 
         # step_logging_for % log_every_n_steps != 0
         recorded_durations_dict["data_wait_time"] = [1.0, 2.0]
-        throughput_logger = ThroughputLogger(logger, {"Batches": 1}, 2)
+        throughput_logger = ThroughputLogger(
+            logger, {"Batches": 1}, log_every_n_steps=2
+        )
         throughput_logger._maybe_log_for_step(state, step_logging_for=1)
         logger.log.assert_not_called()
 
@@ -330,17 +332,40 @@ def test_epoch_logging_time(self) -> None:
             any_order=True,
         )
 
+    def test_warmup_steps(self) -> None:
+        logger = MagicMock(spec=MetricLogger)
+        throughput_logger = ThroughputLogger(
+            logger, {"Batches": 1, "Items": 32}, warmup_steps=1
+        )
+        phase_state = PhaseState(dataloader=[])
+        phase_state.iteration_timer.recorded_durations = {
+            "data_wait_time": [1, 4],
+            "train_iteration_time": [3],
+        }
+        state = State(entry_point=EntryPoint.TRAIN, train_state=phase_state)
+
+        throughput_logger._maybe_log_for_step(state, 1)
+        logger.log.assert_not_called()
+
+        throughput_logger._maybe_log_for_step(state, 2)
+        self.assertEqual(logger.log.call_count, 2)
+
     def test_input_validation(self) -> None:
         logger = MagicMock(spec=MetricLogger)
         with self.assertRaisesRegex(ValueError, "throughput_per_batch cannot be empty"):
-            ThroughputLogger(logger, {}, 1)
+            ThroughputLogger(logger, {})
 
         with self.assertRaisesRegex(
             ValueError, "throughput_per_batch item Batches must be at least 1, got -1"
         ):
-            ThroughputLogger(logger, {"Queries": 8, "Batches": -1}, 1)
+            ThroughputLogger(logger, {"Queries": 8, "Batches": -1})
 
         with self.assertRaisesRegex(
             ValueError, "log_every_n_steps must be at least 1, got 0"
         ):
-            ThroughputLogger(logger, {"Batches": 1}, 0)
+            ThroughputLogger(logger, {"Batches": 1}, log_every_n_steps=0)
+
+        with self.assertRaisesRegex(
+            ValueError, "warmup_steps must be at least 0, got -1"
+        ):
+            ThroughputLogger(logger, {"Batches": 1}, warmup_steps=-1)

torchtnt/framework/callbacks/throughput_logger.py

@@ -48,7 +48,8 @@ class ThroughputLogger(Callback):
             For instace, a user can pass in {Batches: 1, Queries: 32} which will visualize two charts -
             one for Batches per second and one for Queries per second.
             As an example, if each of your batches is of type: {data: torch.Size([16, 8, 8]), labels: torch.Size([16,1])}, then you could pass {Queries: 16}.
-        log_every_n_steps: an optional int to control the log frequency.
+        log_every_n_steps: an int to control the log frequency. Default is 1.
+        warmup_steps: an int to control the number of warmup steps. We will start logging only after the amount of warmup steps were completed. Default is 0.
 
     Note:
         The values reported are only for rank 0.
@@ -59,7 +60,9 @@ def __init__(
         self,
         logger: MetricLogger,
         throughput_per_batch: Mapping[str, int],
+        *,
         log_every_n_steps: int = 1,
+        warmup_steps: int = 0,
     ) -> None:
         self._logger = logger
 
@@ -80,6 +83,12 @@ def __init__(
             )
 
         self._log_every_n_steps = log_every_n_steps
+
+        if warmup_steps < 0:
+            raise ValueError(f"warmup_steps must be at least 0, got {warmup_steps}")
+
+        self._warmup_steps = warmup_steps
+
         self._epoch_start_times: Dict[ActivePhase, float] = {}
         self._steps_in_epoch: Dict[ActivePhase, int] = defaultdict(int)
 
@@ -154,6 +163,9 @@ def _maybe_log_for_step(
         *,
         is_step_end_hook: bool = True,
     ) -> None:
+        if step_logging_for <= self._warmup_steps:
+            return
+
         if step_logging_for % self._log_every_n_steps != 0:
             return