Refine memory subsystem documentation for clarity and accuracy

Author: madeline-underwood

content/learning-paths/servers-and-cloud-computing/memory-subsystem/_index.md

@@ -3,10 +3,6 @@ title: Characterize the memory subsystem of an Arm Linux system using ASCT
 
 description: Use ASCT to measure cache latency, streaming bandwidth, and coherency latency on Arm Neoverse systems, and compare results across Graviton generations.
 
-draft: true
-cascade:
-    draft: true
-
 minutes_to_complete: 60
 
 who_is_this_for: This is an advanced topic for software developers and performance engineers who want to understand and characterize the CPU-side memory subsystem of Arm Linux systems.

content/learning-paths/servers-and-cloud-computing/memory-subsystem/cache-hierarchy.md

@@ -78,7 +78,7 @@ When you access a single byte, the hardware fetches an entire 64-byte cache line
 
 ### Associativity and conflict misses
 
-A 4-way set associative cache can hold 4 lines that map to the same set. If your access pattern happens to map many addresses to the same set, lines get evicted even though the cache isn't full. This is less likely with randomized pointer-chase patterns, but can still occur depending on address distribution and cache indexing but worth understanding.
+A 4-way set associative cache can hold 4 lines that map to the same set. If your access pattern happens to map many addresses to the same set, lines get evicted even though the cache isn't full. Conflict misses are less likely with randomized pointer-chase patterns, but can still occur depending on address distribution and cache indexing, making this concept worth understanding.
 
 ### Prefetching
 

content/learning-paths/servers-and-cloud-computing/memory-subsystem/pointer-chase-latency.md

@@ -8,7 +8,7 @@ layout: learningpathall
 
 ## The pointer-chase technique
 
-Cache and memory latency is the single most important metric for characterizing a memory subsystem. The standard technique is a pointer chase, a linked list where each node points to the next, and the CPU must complete each load before it can issue the next one. This creates a chain of dependent loads that defeats both hardware prefetching and out-of-order execution, letting you measure the effective dependent-load latency for this access pattern at each level of the memory hierarchy.
+Cache and memory latency is the single most important metric for characterizing a memory subsystem. The standard technique is a pointer chase, a linked list where each node points to the next, and the CPU must complete each load before it can issue the next one. Making each load depend on the previous one creates a chain of dependent loads that defeats both hardware prefetching and out-of-order execution, letting you measure the effective dependent-load latency for this access pattern at each level of the memory hierarchy.
 
 ## Why pointer chasing works
 

content/learning-paths/servers-and-cloud-computing/memory-subsystem/system-overview.md

@@ -241,13 +241,13 @@ On both systems, every core has its own unique L1d, L1i, and L2 index, so those
 
 ### Visualize the topology with hwloc
 
-The `hwloc` package provides a visual representation. Install it using the package manager:
+The `hwloc` package provides a visual representation of the hardware topology, including CPU cores, cache hierarchies, and NUMA nodes. The graphical output makes it easier to understand how cores are organized and which caches they share. Install it using the package manager:
 
 ```bash
 sudo apt-get install -y hwloc
 ```
 
-Generate a graphical representation of the hierarchy:
+Generate a PNG diagram of the complete hardware hierarchy. The `hwloc-ls` command enumerates the system topology and formats it as a tree diagram showing cores, caches, and memory:
 
 ```bash
 hwloc-ls --of png > topology.png