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TPTP-AG-20080219
Revision as of 11:32, 19 February 2008 by Paulslau.ca.ibm.com (Talk | contribs)
Date
- February 19, 2008
Attendees
- Present:
- Paul Slauenwhite
- Asaf Yaffe
- Eugene Chan
- Alexander Alexeev
- Joanna Kubasta
- Chris Elford
Topic
- Alex A. will host a technical discussion on enhancement 200320 ([ThreadProf] Add contention analysis features to TPTP Profiler), focusing on the design and implementation of the enhancement.
Minutes
- Background on the Thread Profiler:
- Martini/JVMTI agent.
- Trace model extensions (e.g. thread start/stop and thread states).
- Two profiler views (Thread Statistics and Thread Utilization views).
- Contention analysis:
- Monitor contention:
- Locates monitor requests while other threads own it.
- Leads to deadlock.
- Data Contention:
- Locates data requests while other threads are using it.
- Leads to data corruption.
- Monitor contention:
- Proposed UI changes:
- New Data Contention view.
- Updates to the Thread Utilization view such as filter sets and interactions between threads.
- Critical path analysis:
- Determines which activities are critical and shortening the path by adding resources and performance tuning:
- Proposed thread events:
- Proposed model changes:
- Joint thread execution and their interaction including thread start/stop and thread states and the associated model loader changes.
Questions/Answers
- Q: In Pic. 5, should the check boxes only be rows containing threads? That is, there should not be a check box for the heading of the table. Have you considered adding these check boxes in to the table as a separate column (like Pic. 7)?
- A:
- Q: Have you made a request (via Eugene) to the IBM Graphics Team for the required graphics (e.g. icons) so we can check-in the graphics before our UI freeze (in preparation for our UI freeze on Apr. 4)?
- A:
- Q: In Pic. 7, should thread group be added? Also, can each column be sortable?
- A:
- Q: Will the existing UML2 thread sequence diagram support the new thread information added to the model under this defect?
- A: This will not be included in the scope of this enhancement. A dependent enhancement request will be opened.
Action Items
- Eugene to open a dependent enhancement request for supporting the new thread information added to the model under this defect to the existing UML2 thread sequence diagram .