Dump to file window

Linux Trace Toolkit Reference Manual
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6.3 Dump To File window

Selecting the "Dump to File" Command from the File menu displays the following:

Figure 1: Dump to file window, Process-related options displayed

This is used to write a report to disk, including analysis of the data. Various options can be selected to customize the generated report.

Specify the file to dump to in the "Dump to file" entry field. The Browse button will display the GTK+ file selection window. Any file-related errors will be reported in the main window's status bar.

6.3.1 Process options

Clicking on the Processes tab, as in figure 1, will display the process-related options. These are:

- Trace all processes: Include all processes present during data acquisition in the analysis generated.
- Only trace process: Perform analysis on only one process, specified via the option menu.

6.3.2 Event options

Selecting the Events tab will display the following choices:

Figure 2: Dump to file window, Event-related options selected

- Print trace events: If this check box is selected, the raw list of events will be written to the dumped file. The events included in the dumped file are:

- Trace all events: If this option is selected, all possible events will be written to the report
- Trace these events: Select this radio button if you want to specify which types of events should be included in the list of raw events written to disk. All events whose type is not selected in the list will be ignored.
- Omit these events: Select this radio button if you want to select which types of events should NOT be included in the list of raw events written to disk. All events whose type is not selected in the list will be included in the report written to disk.

6.3.3 SMP options

LTT supports tracing of events that occurred on multiple processors. File dumping options related to this feature can be selected under the SMP tab:

Figure 3: Dump to file window, SMP-related options selected

Your choices are:

- Trace all CPUs: Include all CPUs accounted for in the analysis generated.
- Only trace CPU no.: Perform analysis on only one CPU, as specified in the text entry.

6.3.4 Other options

A number of other options are available through the Options tab as shown on Figure 4:

Figure 4: Dump to file window, other options selected

Each of these check boxes allows to:

- Account time spent in system calls: If selected, the dumped file will include total time spent in system calls for each process
- Do not print event times: When selected, the report written to disk will not include the times at which the events occurred
- Do not print event description strings: Strings describing the events will not be included if there is a check in this check box.
- Do not print length of data entries: Length of the data entry for each event will not be dumped to the file when this option is selected.
- Do not print process identifiers: If selected, process identifiers (PIDs) will not be written to the report generated.
- Do not print CPU identifiers: Checking this box will prevent the printing of CPU identifiers (CPU IDs) in the report.

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