NHSE Software Catalog

NTV - The NAS Trace Visualizer

url

http://www.nas.nasa.gov/NAS/Tools/Projects/NTV/

abstract

NTV is a trace visualization tool that uses trace files produced
using The IBM SP2 MPL Trace Facility or The Automated Instrumentation
and Monitoring System (AIMS) Version 2.2 or Version 3. NTV detects
the trace type, so the same version of NTV works for both trace formats.
A distinctive characteristic of NTV is that it uses static displays
rather then time varying displays. This, in combination with mouse
controlled zooming, gives the user the ability to get a global view
of the execution and a focused view of details. The principal display
is a time line display that shows a color coded time line for each
processor. The color coding shows the processor status. Messages
between processors are indicated by lines connecting the processors
involved in the communications. Controls for these message edges let
the user show all messages, no messages, or only message between
specified sets of processors. Two types of summary (profiling)
displays are also produced: one based on processor (e.g., the time
the processor was blocked sending), and the other based on function
(e.g., the the time a function was blocked sending).

contact

Louis Lopez / llopez@nas.nasa.gov

author

Louis Lopez / llopez@nas.nasa.gov