M. Oberhuber and R. Wismller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....environment dependent functionality is provided by means of extensions. In addition, extensions can provide functionality for specific tools, like e.g. the DETOP extension that introduces source level single stepping into the monitoring system and that is used by the OMIS OCM version of the DETOP [19] debugger. Extensions are also used to monitor our SMiLE system. The basic monitoring architecture and the corresponding extensions of our SCI DSM monitor system are depicted in figure 5. The OMIS OCM core covers all generic node local resources. One monitor extension, the OMIS SCI DSM ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995.

....it from this point on until it reaches the target state. This is depicted in Fig. 3. Program execution Checkpoint Target state Current state Figure 3: Resetting a target program to an arbitrary state In the case study, we used four tools that have been developed at LRRTUM: the debugger DETOP [21], the checkpointing system CoCheck [28] the visualizer VISTOP [31] and the deterministic execution controller codex [9] A short discussion of the relevant implementation issues of these tools, as well as an examination of their mutual interactions is presented in [32] The case study revealed ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170-183. IOS Press, Amsterdam, May 1995. http://wwwbode.in.tum.de/~wismuell/pub/zeus95.ps.gz.

.... observing, and manipulating tools (off line tools can be implemented by a tiny on line module writing trace files) The tools we initially had in mind were those in The Tool set [12] developed at LRR TUM: VISTOP (program flow visualization) PATOP (performance analysis) 2] DETOP (debugging) [11], CoCheck (checkpointing process migration) LoMan (load balancing) Codex (controlled deterministic execution) and Viper (computational steering) But we do not only want to support classical stand alone tools. OMIS is intended to also support interoperable tools (two or more tools applied at ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995.

....environment. 2.2.1 DETOP: Parallel Debugging DETOP supports the debugging of parallel and distributed programs using the PVM programming library. It offers the usual set of debugging commands to control, inspect and modify the executions of multiple processes at the source code level (see [3]) However, as it is the case with virtually all other parallel debuggers, DETOP does not interact with the programming library, e.g. to show the state of message queues or barriers. The only, but important exception is the fact that the debugger displays the processes PVM task IDs in order to ....

M. Oberhuber and R. Wismuller. DETOP - an interactive debugger for PowerPC based multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995. http://wwwbode.in.tum.de/~wismuell/pub/zeus95.ps.gz.

.... are interested in the ancestors of The Tool set, please refer to [1] 1 It will integrate and adapt our existing tools and experience to form a PVM tool environment supporting parallel I O [8] load balancing [5] resource management and checkpointing [9] performance analysis [4, 3] debugging [7], deterministic execution [6] and visualization [2] the citations refer to already existing work) Since we can rely on considerable preparatory work that always aimed towards industrial quality, easy to use interfaces, and integration of programming tools, we expect a first version of The ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, May 1995.

....level of the parallel F90 MPI program generated by the Vienna Fortran Compiler. As this layer only provides state of the art services, existing debugger technology should be reused. The BDS therefore is based on (parts of) the debugger DETOP, originally developed at LRR TUM for Parsytec computers [15]. The current version supports parallel programs written in C and Fortran, running on clusters of workstations using the PVM programming library. A port to MPI will be finished in fall 1998. The major advantage of using DETOP is that it offers a procedural C C interface (called ULIBS) to all ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995.

....to inspect the state of processes and values of data in the parallel program. When executing, this layer does not consider the consistency of the running application with the HPF source code but provides information on each process of the program. The design relies on the DETOP parallel debugger [3] and the OCM monitoring system developed at LRR TUM. HPF DS works on top of the BDS and provides a higher level functionality which includes the source level (HPF) view of the parallel program execution, interactive control and altering the application data. Symbol Table Manager Base Debugging ....

....information in the symbol tables. Thus, debuggers have to obtain this data from other parts of the executable (related to linker symbols) which are specific to the particular file format. In order to keep the debugging system portable, a symbol table management library ST LIB has been developed [3]. In this work, we have extended the functionality of this library to support F90 HPF compilers. It is able to read files in various formats (executable, ASCII) and convert the debugging information to the format and source language independent, internal structure. The library can manage several ....

M. Oberhuber, R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In Parallel Programming and Applications, p. 170--183. IOS Press, Amsterdam, May 1995. LRR-TUM, Germany

....level of the parallel F90 MPI program generated by the Vienna Fortran Compiler. As this layer only provides state of the art services, existing debugger technology should be reused. The BDS therefore is based on (parts of) the debugger DETOP, originally developed at LRR TUM for Parsytec computers [15]. The current version supports parallel programs written in C and Fortran, running on clusters of workstations using the PVM programming library. A port to MPI will be finished in fall 1998. The major advantage of using DETOP is that it offers a procedural C C interface (called ULIBS) to all ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995.

....of the parallel Fortran 90 MPI program generated by the Vienna Fortran Compiler. As this layer only provides state of the art services, existing debugger technology should be reused. Thefore, BDS is based on (parts of) the debugger DETOP, originally developed at LRR TUM for Parsytec computers [23]. The current version supports parallel programs written in C and Fortran, running on clusters of workstations using the PVM programming library. A port to MPI will be finished in autumn 1998. The major advantage of using DETOP is that it offers a procedural C C interface (called ULIBS) to all ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995.

....parallel programs. These debuggers offer commands e.g. to stop, inspect and single step a running program. Some of them allow to work on just one process with a single command (e.g. p2d2 [7] and totalview [1] while others allow to execute commands for sets of processes (e.g. prism [14] and DETOP [11, 17]) With the High Performance Debugging Forum 2 , there is even an effort to standardize the features of parallel debuggers. However, in parallel programs data flow also occurs between different processes due to message passing. So if the process, you are currently looking at with a debugger, ....

....Specification (OMIS) 3 [9] and provides the necessary services for tagging messages and detecting the receipt of a tagged message in a platform independent way. Currently, we port the debugger s front end, which connects to the on line monitoring system, from an existing version called DETOP [11, 17] that has been developed by LRR TUM within a special research grant (SFB 342) and a cooperation with Parsytec, a German vendor of supercomputers and parallel embedded systems. DETOP is not a simple interface built around a sequential debugger, but a real parallel debugger with special support for ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995. http://wwwbode.informatik.tu-muenchen.de/~wismuell/pub/zeus95.ps.gz.

....already several years a very important cooperation links LRR TUM and PARSYTEC, a German vendor of parallel supercomputers and embedded systems. Within that project we designed and implemented versions of our debugging and performance analysis tools especially adapted for PARSYTEC parallel systems [Han94, OW95, WOKH96]. Both tools are successors of former Topsys tools and became an integral part of the PARIX parallel programming system for PowerXplorer systems in 1994. In 1996 we adapted the debugging tool to the new CC systems running EPX, a special version of PARIX for embedded systems. Again, the main effort ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170-183. IOS Press, May 1995. http://wwwbode.informatik.tu-muenchen.de/~wismuell/pub/zeus95.ps.gz.

....group that is performing research in this field for more than eight years. It will integrate and adapt our existing tools and experience to form a PVM tool environment supporting parallel I O [6] load balancing [3] resource management and checkpointing [7] performance analysis [2] debugging [5], deterministic execution [4] and visualization [1] This work is partly funded by the German Science Foundation, Contract: SFB 342, TP A1 FILE SYSTEM PARALLEL THE ANALYZER THE THE LOAD BALANCER THE VISUALIZER THE DEBUGGER THE DETERMINIZER PERFORMANCE System Monitoring Trace Database System ....

M. Oberhuber and R. Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, May 1995.

....on cyclic debugging. Of course, there exist several approaches for debugging parallel programs, but none of them really cares about the problems arising with nondeterminacy. There is support for debugging multiple sequential code parts using multiple processes and process groups [SAB 89] OW95] or the debugging tool enables the user to detect errors by distributed breakpoints and communication breakpoints [BW94] or applying methods of behavioral abstraction [CFH 93] Some like Instant Replay [LMC87] even allow reproducibility, but the most part is affected by the probe effect. ....

Michael Oberhuber and Roland Wismuller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. To be published at ZEUS'95, Linkoping, May 1995.

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M. Oberhuber and R. Wismller. DETOP - An Interactive Debugger for PowerPC Based Multicomputers. In P. Fritzson and L. Finmo, editors, Parallel Programming and Applications, pages 170--183. IOS Press, Amsterdam, May 1995.

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