Trace Compass/Project Meetings/2016-11-28

Attendees

• Alexandre Montplaisir (Efficios)
• Patrick Tasse (Ericsson)
• Mathieu Desnoyers (Efficios)
• Jonathan Rajotte (Efficios)
• Genevieve Bastien (Ecole Polytechnique de Montreal)
• Matthew Khouzam (Ericsson)

Meeting URL

https://hangouts.google.com/hangouts/_/mmcfe25kjzfexifweuzgeeyxlae?authuser=0&hl=en

Update @ Ericsson

• Manual Testing.

Update @ Efficios

• Contract deliverables
• Instance feature
• Filtering for active thread
• new instance for views
• Patch for filtering with upgrade to model.
• Trace cutting ready for review when Babeltrace is ready.
  • discussion on Bookmarks.

Update @ Poly

• Callstack is on gerrit
• Clean datastore is pushed
• Segstore that uses generic history tree
• Loic 2d queries on cfv.
  • 10x boost worst case
  • 2x boost normal
• 4rth year students: dynamic instrumentation in user space.
  • uprobe
  • Add hooks?

Detailed discussions

TmfView

   Base class to support signal managers.

TmfViewer vs tmfView

• [efficios] TmfViewer should be a common item.
• Do we want all views to be pinnable?

In a perfect world from EfficiOS POV: yes.

• Should it be consistent?
• Is it easy toimplement pinnable?

Signal management: yes User interactions and UX: no since you need to propagate the pin state and disable/enable features + deal with UX quirk.

• How do we unpin?

For the proposed patch set: resync with global context.

Other problem:

• different expectations of what is pinning?

Control Flow View Line thickness

• no time to demo
• Simple patches

Discussion of Active thread filtering

• Running group.

Action Items

• Tmf View/Viewer on Mailing list.

• CPU filtering
• Follow up on line thickness