From cc646c8e2a6a26c729f4d46f3ac8a8c4848f3dab Mon Sep 17 00:00:00 2001
From: Marco Realacci <marco@marcorealacci.me>
Date: Wed, 12 Mar 2025 10:59:27 +0100
Subject: [PATCH] vault backup: 2025-03-12 10:59:27

---
 .obsidian/workspace.json                   | 4 ++--
 Concurrent Systems/notes/4 - Semaphores.md | 5 +++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 8236f1a..fbaa41b 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -34,9 +34,9 @@
               "type": "pdf",
               "state": {
                 "file": "Concurrent Systems/slides/class 4.pdf",
-                "page": 4,
+                "page": 5,
                 "left": -23,
-                "top": 187,
+                "top": 391,
                 "zoom": 0.652019002375297
               },
               "icon": "lucide-file-text",
diff --git a/Concurrent Systems/notes/4 - Semaphores.md b/Concurrent Systems/notes/4 - Semaphores.md
index 599ffb0..be9bc6e 100644
--- a/Concurrent Systems/notes/4 - Semaphores.md	
+++ b/Concurrent Systems/notes/4 - Semaphores.md	
@@ -89,3 +89,8 @@ B.consume() :=
 	return tmp
 ```
 
+> [!note] Downside
+> Reading from / writing into the buffer can be very expensive!
+
+#### (Multiple) Producers/Consumers
+**Accessing BUF in MUTEX slows down the implementation**
\ No newline at end of file