Prism 6.0 User's Guide

MPI Performance Analysis Commands

Prism supplies several commands that allow you to control MPI performance analysis. Only two commands are essential, as long as you accept the default behavior of the commands. The two essential commands are tnfcollection on and tnfview, described later in this chapter. If you chose to exercise greater control over the behavior of the process of MPI performance analysis, you can exercise that control with the additional performance analysis commands.

The Prism MPI performance analysis commands are listed in Table 6-1.

Table 6-1 Performance Analysis Commands


Commands	Description
`tnffile`	Creates the final target file (and optionally sets the trace buffer's size) for TNF probe data.
`tnfenable`	Enables selected TNF probes.
`tnfdebug`	Redirects TNF probe data to `stderr`. (This command requires that the Prism `run` command has been executed.)
`tnfdisable`	Disables selected TNF probes. (This command requires that the Prism `run` command has been executed.)
`tnfcollection`	Turns on \| off the TNF collection process.
`tnflist`	Displays selected probes and their enabled state. (This command requires that the Prism `run` command has been executed.)
`tnfview`	Displays for analysis the probe data contained in the TNF target file.

For detailed information about the syntax of Prism TNF commands, see the examples in this chapter and the Prism 6.0 Reference Manual.