remove print-freq option and compute validation loss at each epoch. (#997)

examples/pipeline_wav2letter/main.py

@@ -83,13 +83,6 @@ def parse_args():
     parser.add_argument(
         "--start-epoch", default=0, type=int, metavar="N", help="manual epoch number"
     )
-    parser.add_argument(
-        "--print-freq",
-        default=10,
-        type=int,
-        metavar="N",
-        help="print frequency in epochs",
-    )
     parser.add_argument(
         "--reduce-lr-valid",
         action="store_true",
@@ -615,8 +608,6 @@ def main(rank, args):
             not args.reduce_lr_valid,
         )
 
-        if not (epoch + 1) % args.print_freq or epoch == args.epochs - 1:
-
         loss = evaluate(
             model,
             criterion,
@@ -628,6 +619,9 @@ def main(rank, args):
             not_main_rank,
         )
 
+        if args.reduce_lr_valid and isinstance(scheduler, ReduceLROnPlateau):
+            scheduler.step(loss)
+
         is_best = loss < best_loss
         best_loss = min(loss, best_loss)
         save_checkpoint(
@@ -643,9 +637,6 @@ def main(rank, args):
             not_main_rank,
         )
 
-        if args.reduce_lr_valid and isinstance(scheduler, ReduceLROnPlateau):
-            scheduler.step(loss)
-
     logging.info("End time: %s", datetime.now())
 
     if args.distributed: