[hyades-dev] Hyades UI meeting - 6 Oct 2004 - MINUTES

[Eugene Chan <ewchan@xxxxxxxxxx>]

Topic: 

Discuss and demo on new statistical table views for profiling (Memory Statistics,
Execution Statistics). 

Attendees: 

Eugene Chan
Cheryl Adams
Geary Ridings
Glenn Weidner 
Nagarajan Kalaimani
Sylvain Duguet
Wayne Ho 

Time: 

Wednesday, Oct. 6th, 12:00pm (noon) EST. 

Notes: 

Demo was done on the new Memory and
Execution statistical table views prototype, and compare with existing
statistical table views. Memory and Execution statistics are profiling
set oriented, so that user will no longer have to enable/disable columns
in some statistical views in order to explore the kind of data profile
was configured. Questions and suggestion were raised during the demo and
discussion, as listed below:

1. Is selection being preserved between
views? Selection will be preserved between views or its parent resource
will be selected instead if the selected resource is not available in the
view in focus. eg. Class of a selected method in Execution Statistics will
be selected in Memory Statistic view. 

2. Requirement on configurability of
default profile type view association, such that product picking up Hyades
can configure the Hyades profile type's default view association [defect
62385]

3. Suggestion on providing a common
preference store and UI for user to configure display properties of statistic
views in general. Properties like precision and unit of data in table for
example, should be configurable. This should be made available such that
any extension on Hyades can read the user preference and apply it in their
views to have a common user experience between views. [feature 75860]

4. Filtering Capability in views. Discussion
was made on providing filtering capability [feature 69310] in profiling
views. Design and information gathering should get started for this feature.
Eugene to investigate more on existing product with filtering capability
and report on Hyades UI meeting for interested parties to discuss and get
feedback on designing this feature. Model and UI design will be required.


5. Discussion on instance level information
in Memory Statistics view, the prototype shows only instance size of a
class but not any other instance level information. Question was raised
about the different instance sizes that typically happen with array type
objects (array of primitives or others like [Object), Suggestion was made
to shown instance level information in Memory Statistics view also, in
the same way Execution statistic does.
  
6. Suggestion on showing GC root information in Object Reference view.
'TRCHeapDump (which hangs off of TRCProcess) has a method getGcRoots(),
which returns a list of TRCObjects which are identified as GC Roots. In
Object Reference Graph  the GC roots are used as starting points to
draw a graph and in leakbot, GC roots are identified as candidates which
contribute towards a possible leak. It would be nice to see them annotated
some how in the object reference view.' [ feature 75861]

Regards,
--------------------------------------------------------------------
Eugene Chan
IBM Toronto Laboratory
D3/ENW/8200/MKM
Voice:   1-905-413-6102
Email:  ewchan@xxxxxxxxxx