From afe1df385b5ef37c3f75a49ceda94fdc448bf490 Mon Sep 17 00:00:00 2001
From: Glenn Jocher <glenn.jocher@ultralytics.com>
Date: Tue, 16 Jun 2020 15:08:14 -0700
Subject: [PATCH] dist.destroy_process_group() bug fix

---
 train.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/train.py b/train.py
index 484190a..e9be7e4 100644
--- a/train.py
+++ b/train.py
@@ -356,7 +356,7 @@ def train(hyp):
     if not opt.evolve:
         plot_results()  # save as results.png
     print('%g epochs completed in %.3f hours.\n' % (epoch - start_epoch + 1, (time.time() - t0) / 3600))
-    dist.destroy_process_group() if torch.cuda.device_count() > 1 else None
+    dist.destroy_process_group() if device.type != 'cpu' and torch.cuda.device_count() > 1 else None
     torch.cuda.empty_cache()
     return results