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| 53 | >Chapter 4. Using LTTV text modules</TD |
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| 65 | CLASS="sect1" |
| 66 | ><H1 |
| 67 | CLASS="sect1" |
| 68 | ><A |
| 69 | NAME="textDump" |
| 70 | >4.2. The text dump module</A |
| 71 | ></H1 |
| 72 | ><P |
| 73 | > The goal of this module is to convert the binary data of the traces into |
| 74 | a formatted text file. |
| 75 | </P |
| 76 | ><P |
| 77 | > The text dump module is a good example of a usage of the batch analysis module |
| 78 | backend. In fact, the text dump module depends on it. You don't need to |
| 79 | explicitly load the batchAnalysis module though, as lttv offers a rich module |
| 80 | backend that deals with the dependencies, loading the module automatically if |
| 81 | needed. |
| 82 | </P |
| 83 | ><P |
| 84 | > The text dump module is invoked just like the batchAnalysis module. It adds more |
| 85 | options that can be specified in argument. You may specify the -o switch for the |
| 86 | output file name of the text dump. You can enable the output of the field names |
| 87 | (the identifier of the fields) with the -l switch. The -s switch, for process |
| 88 | states, is very useful to indicate the state in which the process is when the |
| 89 | event happens. |
| 90 | </P |
| 91 | ><P |
| 92 | > If you use the --help option on the textDump module, you will see all the detail |
| 93 | about the switches that can be used to show per cpu statistics and per process |
| 94 | statistics. You will notice that you can use both the switches for the |
| 95 | batchAnalysis module and those for textDump. You will also notice that the |
| 96 | options --process_state (from textDump) and --stats (from batchAnalysis) has the |
| 97 | same short name "-s". If you choose to invoke this option using the short name, |
| 98 | it will use the option of the last module loaded just before the -s switch. |
| 99 | </P |
| 100 | ><P |
| 101 | > For exemple, if you load the textDump module with -m textDump, it will first |
| 102 | load the batchAnalysis module, and then load itself. As it is the last module |
| 103 | loaded, the -s switch used after it will signify --process_stats. On the other |
| 104 | hand, if you choose to specify explicitly the loading of both modules like this |
| 105 | : |
| 106 | </P |
| 107 | ><PRE |
| 108 | CLASS="screen" |
| 109 | > <SAMP |
| 110 | CLASS="prompt" |
| 111 | >$</SAMP |
| 112 | > <KBD |
| 113 | CLASS="userinput" |
| 114 | >lttv -L path/to/lib/plugins -m batchAnalysis -s\ |
| 115 | -m textDump -s -t trace</KBD |
| 116 | > |
| 117 | </PRE |
| 118 | ><P |
| 119 | > The first "-s" will invoke batchAnalysis --stats and the second "-s" will invoke |
| 120 | textDump --process_state. The list of options generated by --help follows the |
| 121 | order of registration of the options by the modules, therefore the invocation |
| 122 | order of the modules. |
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