Td User Manual

Internal

• tda

Overview

The utility works by default in a manner similar to grep, processing the thread dump file sequentially, one thread dump at a time. It filters the thread stacks based on given regular expression and displays the output, subject to options. More than one thread dump in a single file are supported.

Syntax

tda [options] <regex|command> <thread-dump-file> [thread-dump-file, ...]

grep Mode

The default command, and simplest possible usage is to filter and display at standard output only the stack traces that match the given regular expression. For example:

   tda http- thread-dump-file.txt

will display at stdout only the stack traces that contain "http-".

Options:

   -v <regex> <thread-dump-file> - sequentially reads the thread dump file and outputs
           at stdout all thread dumps that DO NOT contain the regular expression.

   -c (count) counts the number of threads that match the regular expression, but does not
           display them. It displays the count at stdout instead. If only the file name is
           specified, the regular expression is assumed to be "match all", as in the following
           example:

               tda -c thread-dump-file.txt

   -s (split) extracts individual thread dumps from the log file and places them into separate
           files. The name of the files is built based on the counter and timestamp (if
           available).

   --<ExtensionClassName> (example --FSI, --FFM) where the class should be available in
           com/novaordis/universus/tdanalyzer/extensions

Regular Expression Syntax:

tda is designed to use the same regular expressions as grep.

   Spaces - enclosing the regular expression in double quotes preserves spaces. Example

           tda "on object monitor" thread-dump-file.txt

Other commands:

   diff <thread-dump-file-1> <thread-dump-file-2> shows the difference between the thread dumps.

   help

   version

Other Commands

diff

tda diff <thread-dump-file1.out> <thread-dump-file2.out>

The simplest form of the diff command compares the thread dump files and displays the names of the names of the threads that are present in one file and not in the other.

help

In-line help.