From ec762fd3afaa6df0715fa1cbe9e6f088b9276ea0 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Fri, 28 Apr 2023 16:22:06 +0200
Subject: Fixed loss/acc logging

---
 training/functional.py | 32 ++++++++++++++++----------------
 training/util.py       |  7 ++++++-
 2 files changed, 22 insertions(+), 17 deletions(-)

diff --git a/training/functional.py b/training/functional.py
index 3036ed9..6ae35a0 100644
--- a/training/functional.py
+++ b/training/functional.py
@@ -468,7 +468,8 @@ def train_loop(
     callbacks: TrainingCallbacks = TrainingCallbacks(),
 ):
     num_training_steps_per_epoch = math.ceil(len(train_dataloader) / gradient_accumulation_steps)
-    num_val_steps_per_epoch = len(val_dataloader) if val_dataloader is not None else 0
+    num_val_steps_per_epoch = math.ceil(
+        len(val_dataloader) / gradient_accumulation_steps) if val_dataloader is not None else 0
 
     num_training_steps = num_training_steps_per_epoch * num_epochs
     num_val_steps = num_val_steps_per_epoch * num_epochs
@@ -476,8 +477,8 @@ def train_loop(
     global_step = 0
     cache = {}
 
-    best_acc = avg_acc.avg
-    best_acc_val = avg_acc_val.avg
+    best_acc = avg_acc.max
+    best_acc_val = avg_acc_val.max
 
     local_progress_bar = tqdm(
         range(num_training_steps_per_epoch + num_val_steps_per_epoch),
@@ -591,35 +592,34 @@ def train_loop(
             on_after_epoch()
 
             if val_dataloader is not None:
-                cur_loss_val = AverageMeter()
-                cur_acc_val = AverageMeter()
+                cur_loss_val = AverageMeter(power=1)
+                cur_acc_val = AverageMeter(power=1)
 
                 with torch.inference_mode(), on_eval():
                     for step, batch in enumerate(val_dataloader):
                         loss, acc, bsz = loss_step(step, batch, cache, True)
-
-                        loss = loss.detach_()
-                        acc = acc.detach_()
+                        loss /= gradient_accumulation_steps
 
                         cur_loss_val.update(loss.item(), bsz)
                         cur_acc_val.update(acc.item(), bsz)
 
-                        avg_loss_val.update(loss.item(), bsz)
-                        avg_acc_val.update(acc.item(), bsz)
-
-                        local_progress_bar.update(1)
-                        global_progress_bar.update(1)
-
                         logs = {
-                            "val/loss": avg_loss_val.avg,
-                            "val/acc": avg_acc_val.avg,
                             "val/cur_loss": loss.item(),
                             "val/cur_acc": acc.item(),
                         }
                         local_progress_bar.set_postfix(**logs)
 
+                        if ((step + 1) % gradient_accumulation_steps == 0) or ((step + 1) == len(val_dataloader)):
+                            local_progress_bar.update(1)
+                            global_progress_bar.update(1)
+
+                avg_loss_val.update(cur_loss_val.avg)
+                avg_acc_val.update(cur_acc_val.avg)
+
                 logs["val/cur_loss"] = cur_loss_val.avg
                 logs["val/cur_acc"] = cur_acc_val.avg
+                logs["val/loss"] = avg_loss_val.avg
+                logs["val/acc"] = avg_acc_val.avg
 
                 accelerator.log(logs, step=global_step)
 
diff --git a/training/util.py b/training/util.py
index 61f1533..0b6bea9 100644
--- a/training/util.py
+++ b/training/util.py
@@ -1,5 +1,6 @@
 from pathlib import Path
 import json
+import math
 from typing import Iterable, Any
 from contextlib import contextmanager
 
@@ -23,7 +24,9 @@ class AverageMeter:
 
     def reset(self):
         self.step = 0
-        self.avg = 0
+        self.min = math.inf
+        self.max = 0.0
+        self.avg = 0.0
 
     def get_decay(self):
         if self.step <= 0:
@@ -35,6 +38,8 @@ class AverageMeter:
         for _ in range(n):
             self.step += n
             self.avg += (val - self.avg) * self.get_decay()
+            self.min = min(self.min, self.avg)
+            self.max = max(self.max, self.avg)
 
 
 class EMAModel(EMAModel_):
-- 
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