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Library for Profiling and Visualization of Memory Consumption of C/C++ Programs
Podola, Radim ; Peringer, Petr (referee) ; Fiedor, Tomáš (advisor)
Performance is an important and, for some classes of programs, even critical aspect of user experience. The current approaches to performance profiling are, however, far from being satisfactory. The aim of this bachelor's thesis is to extend the current state-of-the-art of profiling and visualization solutions, with novel techniques which can be used for a more efficient search of performance bugs in C/C++ programs and their subsequent interpretation to the end user. Thesis briefly introduces existing tools dealing with similar problems and then proposes a novel solution to collection of profiling data and their illustrative interpretation. The resulting implementation is, moreover, integrated in the Perun --- Performance Control System --- platform for profile versioning. The functionality of the implementation is demonstrated on a series of non-trivial programs.
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Offender profiling and the possibilities for its use in arson cases.
Linhartová, Barbora ; Boukalová, Hedvika (advisor) ; Gillernová, Ilona (referee)
The theme of the thesis is psychological offender profiling and the possibilities that it offers in the investigation of arson cases. First it introduces profiling as an investigation method, including its history, the sources on which it is based, what kind of information it contains and how it is created. Next it follows up the problematic issue of fires, their investigation and the classification of intentionally set fires. It also introduces some particular arsonist offender subtypes. Then it pursues the arson profiling and introduces the main profiling approaches. In the end, the author applies the acquired findings to analyze two arson cases according to the particular profiling approaches and then compares the provided leads to a possible offender.
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Profiling translation of conceptual schemas to XML schemas
Berka, Lukáš ; Nečaský, Martin (advisor) ; Holubová, Irena (referee)
In the present work we analyze the algorithm that was introduced in [4]. The algorithm performs a translation of a conceptual schema to an XML schema expressed in the XML Schema language. We look for limitations of the algorithm and try to discover parameters that can be potentially used to influence its behavior. We propose solutions to the most serious limitations. Also, we introduce a concept of a translation profiling. The concept is based on a configuration that contains a set of parameters. We modify the algorithm to use the user requirements specified in the configuration. Thanks to the improvements, the new algorithm works with the concept of XML Namespaces, uses XML Schema designs and also, focuses on an elimination of redundancy. The elimination of redundancy in an output of the algorithm is an important part of this work and we create a formal model that helps us to solve this task.
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Improving efficiency of HEP applications
Horký, Jiří ; Zavoral, Filip (advisor) ; Falt, Zbyněk (referee)
The Large Hadron Collider (LHC) located at CERN, Geneva has finally been put in production, generating unprecedented amount of data. These data are distributed across many computing centers all over the world that form the Worldwide LHC Computing Grid (WLCG). One of the main issues since the beginning of the WLCG project is an effective file access on the site level in order to fully exploit huge computing farms. The aim of this thesis is to explore existing data distribution work flows, standards, methods and protocols. An integral part of the work is the analysis of jobs of physicists to understand input/output workloads and to discover possible inefficiencies. Then, new upcoming solutions are evaluated in terms of performance, sustainability and integration into existing frameworks. It is expected that these solutions will be based on distributed file systems such as NFS 4.1, Lustre and HDFS.
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Profiling of Non-Core Part of Security System
Špaček, Petr ; Michal, Bohumil (referee) ; Kašpárek, Tomáš (advisor)
The thesis is focused on identifying and eliminating performance problems in the security system "AVG Server Edition 8.5 for Linux/FreeBSD", which is used for filtering SMTP traffic. It includes explanation of the principle of SMTP proxy filter and of the interconnection between AVG and the Postfix mail system. It describes methodology of testing, sample designing, measurement and data evaluation. Several performance problems were found and steps to eliminate them were carried out. Suggested optimization was tested and found effective.
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Performance Evaluation of Graphics Accelerator
Dvořák, Milan ; Šolony, Marek (referee) ; Jošth, Radovan (advisor)
This bachelor thesis deals with a performance evaluation of graphics accelerators. Properties of the current graphics accelerators and existing solutions for evaluating their performance are summarized. An own methodology for performance evaluation is proposed and the implementation of an OpenGL aplication with GLUT and GLEW libraries is described. In the last part, several graphic cards are tested, the influence of various factors is examined, and the measured results are discussed.
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Automatic Searching of Instruction Extensions for Application Processors
Češka, Martin ; Křoustek, Jakub (referee) ; Masařík, Karel (advisor)
This thesis deals with the process of automatic searching of instruction-set extensions for application-specific instruction-set processors. This process uses slightly edited ISEGEN algorithm. At first, all important terms including this algorithm are described. Then there is a detailed description of implementation of whole process in C++ programming language. At last, newly created program is considered as useful or useless based on speed-up of processor at performing of input program using found extensions.
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Graphics Application in Python Using OpenGL
Szentandrási, István ; Kršek, Přemysl (referee) ; Navrátil, Jan (advisor)
The aim of this work was to study the possibilities of the Python programming language in computer graphics and to determine its competence in this field. To achieve this the cross platform Python binding to OpenGL and related APIs, PyOpenGL was used to create a demo, and compare it in many ways to an implementation of the demo using the standard OpenGL C API. As the result Python was found in average twice as slow as the alternative C~demo and using much more CPU~load. Because of this fact PyOpenGL is not advisable in professional applications. On the other hand Python has an extensive standard library, very useful specialized libraries, simpler syntax, which makes it ideal to use in education.
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HW Acceleration of Network Unix Tools
Bartoš, Peter ; Martínek, Tomáš (referee) ; Kořenek, Jan (advisor)
In the world, there always appear faster technologies for network communication. Some network tools are not capable of working in high-speed, they are overloading system, therefore they are not able to fulfill their functions. They can not fully monitor the whole traffic and ensure secured services. Thesis analyses network tools, their operations and researches critical spaces for future hardware acceleration. In this context, it introduces effective hardware programming platforms. Using measurements, it evaluates the limits of the tools and mentions the possibilities of acceleration, which are suggested for another thesis.
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Data Profiling Using IPFIX Mediator
Kozubík, Michal ; Bartoš, Václav (referee) ; Kořenek, Jan (advisor)
This thesis deals with the network data profiling using IPFIX mediator. The main task is effective data filtering and configurable profiles management. The profiles management is still not available for IPFIX mediator, which makes analysis of network traffic for users more difficult. Therefore this thesis deals with the design and implementation of configurable profiles management as a plug-in for IPFIX mediator. The plug-in uses profiles hierarchy with filtering rules for data sorting.
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