Editorial updates addressing comments.

Author: joshgav

profiling/README.md

@@ -6,7 +6,7 @@
 
 - Heap Profiling
   - V8 Heap Profiler: [v8/include/v8-profiler.h](https://github.com/v8/blob/master/include/v8-profiler.h)
-    - Also accessible through built-in 'v8' module.
+    - Heap memory usage stats are available through built-in 'v8' module.
 
 Name | Sponsor
 -----|--------

tracing/README.md

@@ -1,7 +1,7 @@
 ## Tracing  
 - [AsyncWrap](./AsyncWrap/README.md) - Most native objects are represented indirectly by the [AsyncWrap class](https://github.com/nodejs/node/blob/master/src/async-wrap.h), so hooks have been added to that class to trace lifecycle (init/destroy) and callback activity (pre/post) related to these objects.
 
-- [OS Tracing](./os-tracing/README.md) - LTTng (Linux), DTrace (Linux, OSX), ETW (Windows)
+- [OS Tracing](./os-tracing/README.md) - LTTng (Linux), SystemTap (Linux), DTrace (OSX), ETW (Windows)
 
 - [VM Tracing](./vm-tracing/README.md) - Tracing native to JS VMs, such as V8's TRACE_EVENT.
 

tracing/os-tracing/README.md

@@ -2,22 +2,24 @@
 
 * [DTrace](http://dtrace.org/)  
   Available on IllumOS, Solaris, Mac
-  The [DTrace blog](http://dtrace.org/blogs/blog/category/node-js/) has some articles on using DTrace with Node.js
+  
+  - The [DTrace blog](http://dtrace.org/blogs/blog/category/node-js/) has some articles on using DTrace with Node.js
 
 * [LTTng](http://lttng.org/)  
   Linux only.  
-  Some info on using LTTng with Node.js are available in the presentations
-  [Tracing Node on Linux with LTTNG](http://nearform.github.io/tracing-node-lttng-nodejsdublin/)
+
+  - [Tracing Node on Linux with LTTNG](http://nearform.github.io/tracing-node-lttng-nodejsdublin/)
+  - [thekemkid/magic-tracing](https://github.com/thekemkid/magic-tracing) is an example of a Node.js application which implements LTTng tracepoints. A demo is available [here](https://asciicinema.org/a/16785).
 
 * [ETW](https://msdn.microsoft.com/en-us/library/windows/desktop/aa363668.aspx)  
   Windows only.  
-  Some information was provided by Bill Ticehurst (@billti) in
-  [issue #10](https://github.com/nodejs/tracing-wg/issues/10#issuecomment-137145822)
-  about how he integrated ETW into Node.js for Windows
+
+  - Some information was provided by Bill Ticehurst (@billti) in [issue #10](https://github.com/nodejs/tracing-wg/issues/10#issuecomment-137145822) about how he integrated ETW into Node.js for Windows
 
 * [Perf](https://perf.wiki.kernel.org/)  
   Linux only.  
-  Can be enabled with `--perf_basic_prof` v8 run-time flag.
+
+  - Can be enabled with `--perf_basic_prof` v8 run-time flag.
 
 * [SystemTap](https://sourceware.org/systemtap/)  
   Linux only.

tracing/vm-tracing/v8-tracing.md

@@ -9,7 +9,7 @@ V8: `trace_event.h` macros utilize `v8::Platform::AddTraceEvent` to write traces
 Node uses `DefaultPlatform` from `v8:src/libplatform/default-platform.h` which currently simply returns 0.  
 A simplistic implementation which logs all trace events to stdout illustrates the basics:
 
-```cpp
+```
 // from v8:src/libplatform/default-platform.cc
 // add `#include <iostream>` to includes