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linux default iconPTT 0.10.0 Publisher's description

PTT 0.10.0

The POSIX Thread Trace Toolkit (PTT) is a library-level trace tool for. the glibc (GNU C library) thread library (Native POSIX Thread Library or NPTL). It aims to help users to analyze and debug multi-threaded applications using the NPTL under Linux systems.

It is distributed under the GNU Lesser General Public Licence (LGPL).

PTT aims to answer the needs of three kinds of users:
* a developer writting multi-threaded applications mainly wants to trace calls to and exits from NPTL routines, with details about parameters. He needs to easily switch from the original untraced NPTL to the traced library, and vice-versa, without recompiling his application.
* a member of a Linux support team providing skills to people who write, test or use applications. He has strong skills about the Linux kernel and glibc, therefore he needs to see what happens inside NPTL. He also wants to be able to analyze in his own offices traces generated at customers site.
* a maintainer of the glibc wants to analyze the behaviour of NPTL and fix problems, which is not an easy task. PTT provides him with traces of internal NPTL events.

Main features
A multi-threaded application can be traced without being recompiling. The trace is analyzed once the application stopped: it is a post-mortem analysis. Three different trace formats are provided:
* a human readable text format.
* a "machine" readable text format. This text format is easily parsable by other programs to extract useful information.
* a graphical format, obtained thanks to PajГ©, an interactive visualization tool, available in the testing and unstable Debian distributions.

PTT offers the following features:
* trace cut: it is possible to only work on a part of the trace, selected with temporal or numeric criteria.
* trace split: it is possible to split the trace into several files to get either one file per process or one file per thread.
* trace filtering: it is possible to filter the trace on various criteria, such as event names, object names, kind of objects or pid.
* log levels: it is possible to dynamically switch from light to richer or full trace.
* continuous recording: the tool can keep only last traces of the execution.
* handle large volume of traces.
* handle bad situations (hang, crash, kill).
* thread contention analysis (most contented threads and NPTL objects).

System Requirements:

No special requirements.
Program Release Status: Minor Update
Program Install Support: Install and Uninstall

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