adding minutes from 2018-02-21 meeting

wg-meetings/2018-02-21.md

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+# Node.js Foundation Diagnostics Working Group Meeting 2018-02-07 Minutes
+
+## Attendees
+ - @mike-kaufman
+ - @watson
+ - @qard (Stephen Belanger)
+ - @mmarchini
+ - @fishrock123 (Jeremiah Senkpiel)
+ - @mhdawson (Michael Dawson)
+
+
+## Links
+* **This Meeting**:
+  * Minutes:  https://github.com/nodejs/diagnostics/blob/master/wg-meetings/2018-02-21.md
+  * Notes: https://docs.google.com/document/d/1ucTWrJuU7YA-PA2DQraqzIjp3mhf0cyx3tmgGiYw-RA/edit?usp=sharing
+  * You Tube: http://youtu.be/RyUR6Ec4BQs
+* **Previous Meeting**: 
+  * Minutes:   https://github.com/nodejs/diagnostics/blob/master/wg-meetings/2018-02-07.md 
+  * Notes: https://docs.google.com/document/d/1BFmXdY4X2v_LMSSifyvaf6LzMx6nuZx1pbXUJQUTINU/edit?usp=sharing
+  * You Tube:  http://youtu.be/8iu59kEIhzE
+
+## Agenda
+
+Extracted from **diag-agenda** labelled issues and pull requests from the **nodejs org** prior to the meeting.
+
+### nodejs/node
+
+* Integrate C++ AsyncHooks Embedder API with native abstraction [#13254](https://github.com/nodejs/node/issues/13254)
+ - A PR to NAN is merged. Need to revisit when Ali is around.
+
+### nodejs/diagnostics
+
+* Diag WG meeting times? [#158](https://github.com/nodejs/diagnostics/issues/158)
+  - two proposed times in issue, 9 AM & 11 AM
+  - TSC conflict would occur once every 6 weeks with 9 AM slot
+  - moderation conflict would occur infrequently with 11 AM slot
+    - moderation meets once a month and is currently out-of-phase with Diag WG meetings
+  - **ACTIONS:** 
+    - [x] @mike-kaufman - update #158 with proposed 11AM time, people can chime in there with thumbs-up/thumbs-down.  
+
+* Deep dive meeting on CI testing to ensure tools compatibility [#156](https://github.com/nodejs/diagnostics/issues/156)
+  - probably too early to deep-dive CI testing
+  - believe @joyeecheung owned getting details on this after summit
+  - proposal to do deep-dives every other meeting
+  - **ACTIONS:** 
+    - [x] @mike-kaufman - open issue #168 to get feedback on additional topics here
+
+
+* Node CPU Profiling Roadmap [#148](https://github.com/nodejs/diagnostics/issues/148)
+  - Peter: we had a meeting with v8 about the interface in detail
+  - Mmarchini: code events listener api
+  - Mmarchini: ability to map addresses to symbols from external profiles
+  - Mmarchini: might also be able to cpu profile native frames in the future
+  - Mike-kaufman: to clarify, will this be a native module?
+  - Mmarchini: yes, already works for <some> stack frames
+  - Mike-kaufman: will it be aimed to be merged into core later?
+  - Mmarchini: yep
+
+
+* Eliminate Monkey Patching for Diagnostic Instrumentation  [#134](https://github.com/nodejs/diagnostics/issues/134)
+  - no progress yet
+  - per summit, plan was to start fresh with something under nodejs organization & iterate from there
+  - **ACTIONS:**
+    - [ ] @mhdawson to ping on issue with next steps, including, deep dive on diagnostics-channel
+
+
+* \[async_hooks\] stable API - tracking issue [#124](https://github.com/nodejs/diagnostics/issues/124)
+  - no updates
+
+* Diagnostics WG Summit - Feb 12-13, 2018 - Ottawa, ON Canada [#121](https://github.com/nodejs/diagnostics/issues/121)
+  - recap tracked in #162
+  - issue closed
+
+* Async-context formalization and diagnostics support [#107](https://github.com/nodejs/diagnostics/issues/107)
+  - no updates since summit
+  - next steps are to update wording in doc to address some confusing that surfaced during summit discussions
+  - would like to write some code to produce model via massive monkey-patching effort
+    - will work on down-level versions of node
+    - will provide substrate of events & DAG to build on 
+    - will help people better understand proposed model.
+
+* \[trace_event\] tracking issue [#84](https://github.com/nodejs/diagnostics/issues/84)
+  - overlap with recent efforts around conslidating tracing libraries & exposing tracing through JS..
+
+
+### nodejs/benchmarking
+
+* Perf/Node.js [#168](https://github.com/nodejs/benchmarking/issues/168)
+  - overlaps with #148
+  - recommend to close this