vault backup: 2025-03-24 08:39:22

.obsidian/workspace.json

@@ -36,9 +36,9 @@
               "type": "pdf",
               "state": {
                 "file": "Concurrent Systems/slides/class 6.pdf",
-                "page": 8,
+                "page": 9,
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-                "top": 568,
+                "top": 594,
                 "zoom": 0.6805225653206651
               },
               "icon": "lucide-file-text",
@@ -218,10 +218,10 @@
       "companion:Toggle completion": false
     }
   },
-  "active": "6c846cff8fe1d071",
+  "active": "105f7a61963f10e7",
   "lastOpenFiles": [
-    "Concurrent Systems/notes/6a - Alternatives to Atomicity.md",
     "Concurrent Systems/slides/class 6.pdf",
+    "Concurrent Systems/notes/6a - Alternatives to Atomicity.md",
     "Pasted image 20250324082545.png",
     "Pasted image 20250324082534.png",
     "Concurrent Systems/notes/6 - Atomicity.md",

Concurrent Systems/notes/6a - Alternatives to Atomicity.md

@@ -13,4 +13,8 @@ Consider for example the following two processes:
 p1: Q.enq(a); Q'.enq(b'); Q'deq()->b'
 p2: Q'.enq(a'); Q.enq(b); Q.deq()->b
 ```
+In isolation, both processes are sequentially consistent.
 
+However, no total order on the previous 6 operations respects the semantics of a queue:
+	- if p1 receives b' from Q'.deq, we have that Q'.enq(a'), must arrive after Q'.enq(b')
+	- to respect $\to_{proc}$