HP WDB GUI 5.7 Release Notes (September 2007)

To view the block level details in an arena, select Block Details after selecting the required
Arena ID in the Arenas menu. The block distribution in the arena is displayed in the Arenas
Block Distribution window.
The Arenas Block Distribution window displays the block level space distribution graph for
an arena. The graph displays the space occupied by the user blocks, the free blocks, the
unclaimed space, and the malloc() metadata (which includes the node blocks, the cached
blocks, the holding header blocks, the holding SBA blocks). The virtual address of the blocks
is used to arrange the blocks in the graph. The Block ID of the block is also displayed within
the block if the scale of the graph allows the display. The start of the heap, the end of the
heap, the total heap size, and the total number of blocks are also listed.
HP WDB GUI displays the block distribution graph in the default window. If the complete
block distribution graph cannot be displayed in the default window, select Expand Block
Distribution Graph toggle option to view the magnified block distribution graph.
To view the Block ID, the block type, the block size, and the virtual address for each block in
the arena,you must right-click on the required block in the block distribution graph.
The number of used blocks in each block-count range is also displayed graphically for the
selected arena. This information is also displayed in a tabular format.
Heap Arena Space Usage
The Heap Arena Space Usage frame displays the Arena ID, the space usage (in KB) in the
arena, and the percentage space usage in each arena in comparison to the total space occupied
by all the arenas. The comparative space usage across arenas is also displayed with a pie
chart. The Arena ID is also displayed in the pie chart if the scale of the graph allows it.
Full Summary
To view the summary for all the arenas, click Full Summary. The summary information for
all the arenas is displayed in a new Arena Summary window.
Heap Arena Detailed Graphs
The Heap Arena Detailed Graphs display the following information:
The byte distribution (in KB) across used ordinary blocks, used small blocks, free
ordinary blocks, and free small blocks is displayed for each arena. This information is
displayed as a bar graph for each arena.
The byte distribution for uthe used ordinary blocks, the used small blocks, the free
ordinary blocks, and the free small blocks across the arenas is displayed with a pie
chart. This information is also displayed in a table.
The number of blocks that are distributed across the used ordinary blocks, the used
small blocks, the free ordinary blocks, and the free small blocks are displayed for each
arena. This information is displayed as a bar graph for each arena.
The number of blocks occupied by the used ordinary blocks, the used small blocks, the
free ordinary blocks, and the free small blocks across the arenas is displayed with a pie
chart. This information is also displayed in a table.
Support for Viewing the Incremental Heap Profile