Information Technology Reference
In-Depth Information
Target:
By default, this matches the process or thread that Instruments is monitoring. Some instruments
allow you to select a different process or thread with this menu, to enable simultaneous monitoring across
multiple applications.
Launch Configuration:
These are general settings for the instrument.
Track Display - Zoom:
The Zoom option changes the vertical height of the time line. You can use it to
emphasize the data from one instrument or to highlight activity at the lower scale of the display.
Track Display - Style and Type:
The Style and Type options can show cumulative or activity-summary
views of the data. The Overlay type displays different runs on a single graph, while the Stacked type (which
is preferred) displays a series of strips with the same vertical scale.
FIGURE 16.23
Changing instrument settings with the inspector
For the Allocations instrument, the remaining settings are unique. The Launch Configuration options for the Al-
locations instrument include a selection of check boxes. Most are self-explanatory. For example, the Record ref-
erence counts option does what you'd expect it to; if you uncheck the box, the instrument doesn't record refer-
ence counts.
TIP
Note that Enable NSZombie detection turns on the zombie monitoring feature introduced earlier. There is no sep-
arate Zombies instrument; zombie detection is built into the Allocations instrument, and you can enable or dis-
