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| 1676 | tullio | 1 | \documentclass[english]{report} |
| 2 | \usepackage[T1]{fontenc} |
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| 3 | \usepackage[latin1]{inputenc} |
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| 4 | \usepackage{geometry} |
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| 5 | \geometry{verbose,a4paper} |
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| 6 | \usepackage{float} |
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| 7 | \usepackage{makeidx} |
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| 8 | \makeindex |
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| 9 | \usepackage{graphicx} |
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| 10 | |||
| 11 | \makeatletter |
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| 12 | |||
| 13 | \newenvironment{intest}{\noindent\large\bf\hspace*{1pt}} |
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| 14 | {\vspace*{-5pt}\\\line(1,0){433}} |
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| 15 | |||
| 16 | \usepackage{babel} |
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| 17 | \makeatother |
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| 18 | \begin{document} |
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| 19 | \thispagestyle{empty} |
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| 20 | |||
| 21 | \begin{center}{\LARGE S.Ha.R.K. User Manual}\end{center}{\LARGE \par} |
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| 22 | \vfill{} |
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| 23 | |||
| 24 | \begin{center}Volume V\end{center} |
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| 25 | \begin{center}The S.Ha.R.K. New Tracer\end{center} \vfill{} |
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| 26 | \begin{center}Written by\end{center} |
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| 27 | \begin{center}Tullio Facchinetti (tullio.facchinetti at unipv.it)\end{center} \vfill{} |
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| 28 | \begin{center}\includegraphics[width=2cm]{../common/sssup.ps}\end{center} |
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| 29 | \begin{center}Scuola Superiore di Studi e Perfezionamento S. Anna\end{center} |
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| 30 | \begin{center}RETIS Lab\end{center} |
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| 31 | \begin{center}Via Carducci, 40 - 56100 Pisa\end{center} |
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| 32 | |||
| 33 | \pagebreak |
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| 34 | |||
| 35 | \tableofcontents{} |
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| 36 | |||
| 37 | |||
| 38 | \chapter{The S.Ha.R.K. tracer} |
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| 39 | |||
| 40 | The new Tracer is a powerful tool to understand what happens while a |
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| 41 | S.Ha.R.K. \cite{Gai01} application is executed. The Tracer logs |
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| 42 | a set of events corresponding with the most important activities |
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| 43 | within the kernel, such as preemptions, interrupt activations, |
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| 44 | mutexes blocks and releases, and much more. |
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| 45 | |||
| 46 | During the execution, the kernel logs the sequence of events in |
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| 47 | memory; such events are then written to disk or sent through the |
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| 48 | network, typically at the end of the application execution. Each |
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| 49 | event is made by: a high resolution timestamp (TSC, Time Stamp |
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| 50 | Counter) corresponding to the instant at which the event has been |
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| 51 | logged; the event type; 2 optional parameters to add additional |
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| 52 | information to the event. |
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| 53 | |||
| 54 | The Tracer can also be used to log custom events, since it |
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| 55 | reserves a number of free event types for user events. |
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| 56 | |||
| 57 | To use the features made available by the Tracer, the Tracer |
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| 58 | functions must be enabled into the kernel by specifying |
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| 59 | |||
| 60 | ~ |
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| 61 | |||
| 62 | TRACER = NEW |
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| 63 | |||
| 64 | ~ |
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| 65 | |||
| 66 | into the \textit{shark.cfg} configuration file. The S.Ha.R.K. |
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| 67 | kernel must be built with this option set. |
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| 68 | |||
| 69 | %---------------------------------------------------------------------------- |
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| 70 | \chapter{Primitives} |
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| 71 | %---------------------------------------------------------------------------- |
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| 72 | |||
| 73 | \vspace{7mm} |
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| 74 | |||
| 75 | %------------------------------------------------------------ |
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| 76 | \begin{intest} |
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| 77 | FTrace\_enable \index{FTrace\_enable} |
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| 78 | \end{intest} |
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| 79 | |||
| 80 | \begin{description} |
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| 81 | \item [\textbf{int FTrace\_enable();}] |
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| 82 | \item [\textbf{Description:}] Enable the Tracer. When this function is called, the Tracer starts |
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| 83 | the event logging. |
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| 84 | \end{description} |
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| 85 | |||
| 86 | %------------------------------------------------------------ |
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| 87 | \begin{intest} |
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| 88 | FTrace\_disable \index{FTrace\_disable} |
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| 89 | \end{intest} |
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| 90 | |||
| 91 | \begin{description} |
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| 92 | \item [\textbf{int FTrace\_disable();}] |
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| 93 | \item [\textbf{Description:}] Disable the Tracer. When this function is called, the Tracer stops |
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| 94 | the event logging. |
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| 95 | \end{description} |
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| 96 | |||
| 97 | %------------------------------------------------------------ |
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| 98 | \begin{intest} |
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| 99 | FTrace\_chunk\_create \index{FTrace\_chunk\_create} |
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| 100 | \end{intest} |
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| 101 | |||
| 102 | \begin{description} |
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| 103 | \item [\textbf{int FTrace\_chunk\_create(int normal\_size, int emergency\_size, FTrace\_flags flags);}] |
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| 104 | \item [\textbf{Description:}] Create a new chunk. |
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| 105 | \end{description} |
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| 106 | |||
| 107 | %------------------------------------------------------------ |
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| 108 | \begin{intest} |
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| 109 | FTrace\_chunk\_delete \index{FTrace\_chunk\_delete} |
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| 110 | \end{intest} |
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| 111 | |||
| 112 | \begin{description} |
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| 113 | \item [\textbf{int FTrace\_chunk\_delete(int number);}] |
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| 114 | \item [\textbf{Description:}] Delete a Chunk. |
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| 115 | \end{description} |
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| 116 | |||
| 117 | %------------------------------------------------------------ |
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| 118 | \begin{intest} |
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| 119 | FTrace\_set\_chunk\_flags \index{FTrace\_set\_chunk\_flags} |
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| 120 | \end{intest} |
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| 121 | |||
| 122 | \begin{description} |
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| 123 | \item [\textbf{int FTrace\_set\_chunk\_flags(int number, FTrace\_flags flags);}] |
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| 124 | \item [\textbf{Description:}] Set the chunk flags. |
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| 125 | \end{description} |
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| 126 | |||
| 127 | %------------------------------------------------------------ |
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| 128 | \begin{intest} |
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| 129 | FTrace\_get\_chunk\_flags \index{FTrace\_get\_chunk\_flags} |
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| 130 | \end{intest} |
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| 131 | |||
| 132 | \begin{description} |
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| 133 | \item [\textbf{int FTrace\_get\_chunk\_flags(int number, FTrace\_flags *flags);}] |
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| 134 | \item [\textbf{Description:}] Returns chunk flags. |
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| 135 | \end{description} |
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| 136 | |||
| 137 | %------------------------------------------------------------ |
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| 138 | \begin{intest} |
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| 139 | FTrace\_actual\_chunk\_select \index{FTrace\_actual\_chunk\_select} |
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| 140 | \end{intest} |
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| 141 | |||
| 142 | \begin{description} |
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| 143 | \item [\textbf{int FTrace\_actual\_chunk\_select(int number);}] |
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| 144 | \item [\textbf{Description:}] Select the actual chunk. |
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| 145 | \end{description} |
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| 146 | |||
| 147 | %------------------------------------------------------------ |
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| 148 | \begin{intest} |
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| 149 | FTrace\_chunk\_link \index{FTrace\_chunk\_link} |
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| 150 | \end{intest} |
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| 151 | |||
| 152 | \begin{description} |
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| 153 | \item [\textbf{int FTrace\_chunk\_link(int chunk\_A, int chunk\_B);}] |
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| 154 | \item [\textbf{Description:}] Link two chunks. |
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| 155 | \end{description} |
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| 156 | |||
| 157 | %------------------------------------------------------------ |
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| 158 | \begin{intest} |
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| 159 | FTrace\_get\_first\_chunk \index{FTrace\_get\_first\_chunk} |
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| 160 | \end{intest} |
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| 161 | |||
| 162 | \begin{description} |
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| 163 | \item [\textbf{int FTrace\_get\_first\_chunk(FTrace\_flags flags);}] |
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| 164 | \item [\textbf{Description:}] Find the first chunk with specific flags. |
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| 165 | \end{description} |
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| 166 | |||
| 167 | %------------------------------------------------------------ |
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| 168 | \begin{intest} |
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| 169 | FTrace\_get\_chunk\_table \index{FTrace\_get\_chunk\_table} |
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| 170 | \end{intest} |
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| 171 | |||
| 172 | \begin{description} |
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| 173 | \item [\textbf{FTrace\_Chunk\_Ptr *FTrace\_get\_chunk\_table();}] |
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| 174 | \item [\textbf{Description:}] Get chunks status. |
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| 175 | \end{description} |
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| 176 | |||
| 177 | %------------------------------------------------------------ |
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| 178 | \begin{intest} |
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| 179 | FTrace\_compress\_chunk \index{FTrace\_compress\_chunk} |
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| 180 | \end{intest} |
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| 181 | |||
| 182 | \begin{description} |
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| 183 | \item [\textbf{int FTrace\_compress\_chunk(int number, FTrace\_flags new\_flags);}] |
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| 184 | \item [\textbf{Description:}] Create a new memory region where the compressed data are stored. |
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| 185 | \end{description} |
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| 186 | |||
| 187 | %------------------------------------------------------------ |
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| 188 | \begin{intest} |
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| 189 | FTrace\_send\_chunk \index{FTrace\_send\_chunk} |
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| 190 | \end{intest} |
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| 191 | |||
| 192 | \begin{description} |
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| 193 | \item [\textbf{int FTrace\_send\_chunk(int number, int osd\_flags, |
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| 194 | FTrace\_flags new\_flags);}] |
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| 195 | \item [\textbf{Description:}] Send the chunk out from the memory. |
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| 196 | \end{description} |
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| 197 | |||
| 198 | %------------------------------------------------------------ |
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| 199 | \begin{intest} |
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| 200 | FTrace\_init\_disk\_writer \index{FTrace\_init\_disk\_writer} |
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| 201 | \end{intest} |
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| 202 | |||
| 203 | \begin{description} |
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| 204 | \item [\textbf{int FTrace\_init\_disk\_writer(char *fname, int flag, |
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| 205 | char *l\_ip, char *t\_ip);}] |
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| 206 | \item [\textbf{Description:}] Initialize the disk Tracer chunk dumper. It sets |
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| 207 | the internal chunk sender to the function that writes chunks on disk. It |
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| 208 | initializes the filename that will be used to open the file for saving chunks. |
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| 209 | \end{description} |
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| 210 | |||
| 211 | %------------------------------------------------------------ |
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| 212 | \begin{intest} |
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| 213 | FTrace\_disk\_writer \index{FTrace\_disk\_writer} |
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| 214 | \end{intest} |
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| 215 | |||
| 216 | \begin{description} |
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| 217 | \item [\textbf{void FTrace\_disk\_writer(FTrace\_Chunk\_Ptr c);}] |
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| 218 | \item [\textbf{Description:}] This function is called by the application when it |
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| 219 | asks to write chunk c on disk. It saves the chunk data into the chunk\_to\_disk |
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| 220 | array. At the runlevel after the exit, all the saved chunks will be written to |
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| 221 | disk. |
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| 222 | \end{description} |
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| 223 | |||
| 224 | %------------------------------------------------------------ |
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| 225 | \begin{intest} |
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| 226 | FTrace\_OSD\_init\_udp \index{FTrace\_OSD\_init\_udp} |
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| 227 | \end{intest} |
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| 228 | |||
| 229 | \begin{description} |
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| 230 | \item [\textbf{int FTrace\_OSD\_init\_udp(int flag, char *l\_ip, char *t\_ip);}] |
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| 231 | \item [\textbf{Description:}] Initialize the Tracer chunk network sender using |
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| 232 | the UDP protocol supported by S.Ha.R.K. If flag = 1 initializes the network |
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| 233 | driver, otherwise it considers that the network layer has already been |
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| 234 | initialized. It also sets the internal chunk sender to the function that |
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| 235 | initializes the task for sending the chunk. |
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| 236 | \end{description} |
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| 237 | |||
| 238 | %------------------------------------------------------------ |
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| 239 | \begin{intest} |
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| 240 | FTrace\_set\_filter \index{FTrace\_set\_filter} |
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| 241 | \end{intest} |
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| 242 | |||
| 243 | \begin{description} |
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| 244 | \item [\textbf{void FTrace\_set\_filter(BYTE family, int status);}] |
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| 245 | \item [\textbf{Description:}] Set the filter for a specific family of events |
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| 246 | (see Table \ref{tab:filter-events} for a list of all the event families). When |
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| 247 | the filter is enabled for a given family of events, all the events belonging to |
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| 248 | that family are not logged.\\ |
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| 249 | While \texttt{status} set to 1 enables the filter, \texttt{status} |
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| 250 | set to 0 disables the filter. |
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| 251 | \end{description} |
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| 252 | |||
| 253 | %------------------------------------------------------------ |
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| 254 | \begin{intest} |
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| 255 | TRACER\_LOGEVENT \index{TRACER\_LOGEVENT} |
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| 256 | \end{intest} |
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| 257 | |||
| 258 | \begin{description} |
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| 259 | \item [\textbf{TRACER\_LOGEVENT(WORD type, WORD par1, DWORD par2);}] |
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| 260 | \item [\textbf{Description:}] Stores a new event of \texttt{type} type into the |
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| 261 | current chunk, together with the 2 parameters \texttt{par1} (2 bytes) and |
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| 262 | \texttt{par2} (4 bytes). |
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| 263 | \end{description} |
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| 264 | |||
| 265 | %---------------------------------------------------------------------------- |
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| 266 | \chapter{Event types description} |
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| 267 | \label{ch:Event-types-description} |
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| 268 | %---------------------------------------------------------------------------- |
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| 269 | |||
| 270 | This Chapter reports all the available event type codes currently |
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| 271 | supported by S.Ha.R.K. |
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| 272 | |||
| 273 | \begin{table} |
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| 274 | \begin{center} |
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| 275 | \begin{tabular}{|l|c|c|c|} |
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| 276 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 277 | \hline FTrace\_EVT\_empty & 0x00 & . & . \\ |
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| 278 | \hline FTrace\_EVT\_cycles\_per\_msec & 0x10 & .& [clk/msec] \\ |
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| 279 | \hline FTrace\_EVT\_trace\_start& 0x20 & . & . \\ |
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| 280 | \hline FTrace\_EVT\_trace\_stop & 0x30& . & . \\ |
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| 281 | \hline FTrace\_EVT\_blackout\_start & 0x40 & .& . \\ |
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| 282 | \hline FTrace\_EVT\_blackout\_end & 0x50 & .& . \\ |
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| 283 | \hline FTrace\_EVT\_id & 0x60 & context& pid \\ |
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| 284 | \hline FTrace\_EVT\_numevents & 0x70 & .& . \\ |
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| 285 | \hline |
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| 286 | \end{tabular} |
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| 287 | \end{center} |
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| 288 | \caption{General trace events.} |
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| 289 | \end{table} |
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| 290 | |||
| 291 | |||
| 292 | \begin{table} |
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| 293 | \begin{center} |
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| 294 | \begin{tabular}{|l|c|c|c|} |
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| 295 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 296 | \hline FTrace\_EVT\_ipoint & 0x01 & number & . \\ \hline |
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| 297 | \end{tabular} |
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| 298 | \end{center} |
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| 299 | \caption{Lightweight tracing events.} |
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| 300 | \end{table} |
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| 301 | |||
| 302 | |||
| 303 | \begin{table} |
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| 304 | \begin{center} |
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| 305 | \begin{tabular}{|l|c|c|c|} |
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| 306 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 307 | \hline FTrace\_EVT\_task\_create & 0x02 & context& pid \\ |
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| 308 | \hline FTrace\_EVT\_task\_activate & 0x12 & context & . \\ |
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| 309 | \hline FTrace\_EVT\_task\_dispatch & 0x22 & . & . \\ |
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| 310 | \hline FTrace\_EVT\_task\_epilogue & 0x32 & . & . \\ |
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| 311 | \hline FTrace\_EVT\_task\_end & 0x42 & context & pid \\ |
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| 312 | \hline FTrace\_EVT\_task\_begin\_cycle & 0x52 & . & . \\ |
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| 313 | \hline FTrace\_EVT\_task\_end\_cycle & 0x62 & context & level \\ |
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| 314 | \hline FTrace\_EVT\_task\_sleep & 0x72 & . & . \\ |
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| 315 | \hline FTrace\_EVT\_task\_schedule & 0x82 & exec\_shadow.context & exec.context \\ |
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| 316 | \hline FTrace\_EVT\_task\_timer & 0x92 & context & level \\ |
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| 317 | \hline FTrace\_EVT\_task\_disable& 0xA2 & . & . \\ |
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| 318 | \hline FTrace\_EVT\_task\_deadline\_miss & 0xB2 & context & . \\ |
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| 319 | \hline FTrace\_EVT\_task\_wcet\_violation & 0xC2 & context& . \\ |
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| 320 | \hline |
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| 321 | \end{tabular} |
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| 322 | \end{center} |
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| 323 | \caption{Task related events.} |
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| 324 | \end{table} |
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| 325 | |||
| 326 | \begin{table} |
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| 327 | \begin{center} |
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| 328 | \begin{tabular}{|l|c|c|c|} |
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| 329 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 330 | \hline FTrace\_EVT\_interrupt\_start & 0x03 & int & . \\ |
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| 331 | \hline FTrace\_EVT\_interrupt\_end & 0x13 & int & . \\ |
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| 332 | \hline FTrace\_EVT\_interrupt\_hit & 0x23 & |
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| 333 | \multicolumn{2}{c|}{Instant where interrupt was hit (no end)} \\ |
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| 334 | \hline FTrace\_EVT\_interrupt\_count & 0x33 & |
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| 335 | \multicolumn{2}{c|}{Number of interrupts raised since last interrupt\_count} \\ |
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| 336 | \hline |
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| 337 | \end{tabular} |
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| 338 | \end{center} |
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| 339 | \caption{Interrupt events, even more lightweight than ipoints.} |
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| 340 | \end{table} |
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| 341 | |||
| 342 | \begin{table} |
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| 343 | \begin{center} |
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| 344 | \begin{tabular}{|l|c|c|c|} |
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| 345 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 346 | \hline FTrace\_EVT\_to\_real\_mode & 0x04 & . & . \\ |
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| 347 | \hline FTrace\_EVT\_to\_protected\_mode & 0x14 & . & . \\ |
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| 348 | \hline FTrace\_EVT\_CLI & 0x24 & . & . \\ \hline |
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| 349 | FTrace\_EVT\_STI & 0x34 & . & . \\ \hline |
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| 350 | \end{tabular} |
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| 351 | \end{center} |
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| 352 | \caption{Other CPU specific events.} |
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| 353 | \end{table} |
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| 354 | |||
| 355 | \begin{table} |
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| 356 | \begin{center} |
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| 357 | \begin{tabular}{|l|c|c|c|} |
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| 358 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 359 | \hline FTrace\_EVT\_set\_priority & 0x05 & . & . \\ |
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| 360 | \hline FTrace\_EVT\_context\_switch & 0x15 & context& . \\ |
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| 361 | \hline FTrace\_EVT\_inheritance & 0x25 & exec\_shadow.context & exec.context \\ |
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| 362 | \hline |
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| 363 | \end{tabular} |
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| 364 | \end{center} |
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| 365 | \caption{Changes on task attributes and state.} |
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| 366 | \end{table} |
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| 367 | |||
| 368 | \begin{table} |
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| 369 | \begin{center} |
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| 370 | \begin{tabular}{|l|c|c|c|} |
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| 371 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 372 | \hline FTrace\_EVT\_set\_mutex\_create & 0x06 & . & . \\ |
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| 373 | \hline FTrace\_EVT\_set\_mutex\_lock & 0x16 & context& mutex \\ |
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| 374 | \hline FTrace\_EVT\_set\_mutex\_inherit & 0x26 & . & . \\ |
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| 375 | \hline FTrace\_EVT\_set\_mutex\_unlock & 0x43 & context & mutex \\ |
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| 376 | \hline FTrace\_EVT\_set\_mutex\_wait & 0x46 & context & mutex \\ |
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| 377 | \hline FTrace\_EVT\_set\_mutex\_post & 0x56 & context& mutex \\ |
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| 378 | \hline |
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| 379 | \end{tabular} |
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| 380 | \end{center} |
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| 381 | \caption{Mutex events.} |
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| 382 | \end{table} |
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| 383 | |||
| 384 | \begin{table} |
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| 385 | \begin{center} |
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| 386 | \begin{tabular}{|l|c|c|c|} |
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| 387 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 388 | \hline FTrace\_EVT\_signal & 0x07 & . & . \\ |
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| 389 | \hline |
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| 390 | \end{tabular} |
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| 391 | \end{center} |
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| 392 | \caption{Signal events.} |
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| 393 | \end{table} |
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| 394 | |||
| 395 | \begin{table} |
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| 396 | \begin{center} |
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| 397 | \begin{tabular}{|l|c|c|c|} |
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| 398 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 399 | \hline FTrace\_EVT\_server\_create & 0x08 & . & server \\ |
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| 400 | \hline FTrace\_EVT\_server\_replenish & 0x18 & .& server \\ |
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| 401 | \hline FTrace\_EVT\_server\_exhaust & 0x28 & . & server \\ |
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| 402 | \hline FTrace\_EVT\_server\_reclaiming & 0x38 & . & server \\ |
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| 403 | \hline FTrace\_EVT\_server\_remove & 0x48 & . & server \\ |
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| 404 | \hline FTrace\_EVT\_server\_active & 0x58 & . & server \\ |
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| 405 | \hline FTrace\_EVT\_server\_using\_rec & 0x68 & reclaiming & server \\ |
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| 406 | \hline |
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| 407 | \end{tabular} |
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| 408 | \end{center} |
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| 409 | \caption{Specific server events.} |
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| 410 | \end{table} |
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| 411 | |||
| 412 | \begin{table} |
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| 413 | \begin{center} |
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| 414 | \begin{tabular}{|l|c|c|c|} |
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| 415 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 416 | \hline FTrace\_EVT\_user\_event\_0 & 0x09 & free & free \\ |
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| 417 | \hline FTrace\_EVT\_user\_event\_1 & 0x19 & free & free \\ |
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| 418 | \hline FTrace\_EVT\_user\_event\_2 & 0x29 & free & free \\ |
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| 419 | \hline FTrace\_EVT\_user\_event\_3 & 0x39 & free & free \\ |
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| 420 | \hline FTrace\_EVT\_user\_event\_4 & 0x49 & free & free \\ |
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| 421 | \hline FTrace\_EVT\_user\_event\_5 & 0x59 & free & free \\ |
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| 422 | \hline FTrace\_EVT\_user\_event\_6 & 0x69 & free & free \\ |
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| 423 | \hline FTrace\_EVT\_user\_event\_7 & 0x79 & free & free \\ |
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| 424 | \hline FTrace\_EVT\_user\_event\_8 & 0x89 & free & free \\ |
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| 425 | \hline FTrace\_EVT\_user\_event\_9 & 0x99 & free & free \\ |
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| 426 | \hline FTrace\_EVT\_user\_event\_10 & 0xA9 & free & free \\ |
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| 427 | \hline FTrace\_EVT\_user\_event\_11 & 0xB9 & free & free \\ |
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| 428 | \hline FTrace\_EVT\_user\_event\_12 & 0xC9 & free & free \\ |
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| 429 | \hline FTrace\_EVT\_user\_event\_13 & 0xD9 & free & free \\ |
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| 430 | \hline FTrace\_EVT\_user\_event\_14 & 0xE9 & free & free \\ |
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| 431 | \hline |
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| 432 | \end{tabular} |
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| 433 | \end{center} |
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| 434 | \caption{User defined events.} |
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| 435 | \end{table} |
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| 436 | |||
| 437 | \begin{table} |
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| 438 | \begin{center} |
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| 439 | \begin{tabular}{|l|c|c|c|} |
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| 440 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 441 | \hline FTrace\_EVT\_timer\_post & 0x0B & . & . \\ |
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| 442 | \hline FTrace\_EVT\_timer\_delete & 0x1B & . & . \\ |
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| 443 | \hline FTrace\_EVT\_timer\_wakeup\_start & 0x2B & . & . \\ |
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| 444 | \hline FTrace\_EVT\_timer\_wakeup\_end & 0x3B & context & . \\ |
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| 445 | \hline |
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| 446 | \end{tabular} |
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| 447 | \end{center} |
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| 448 | \caption{Timer events.} |
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| 449 | \end{table} |
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| 450 | |||
| 451 | \begin{table} |
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| 452 | \begin{center} |
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| 453 | \begin{tabular}{|l|c|c|c|} |
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| 454 | \hline Name & Code & Parameter 1 & Parameter 2 \\ \hline |
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| 455 | \cline{1-1} \cline{2-2} FTrace\_EVT\_data\_pointer & 0x1A & |
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| 456 | \multicolumn{2}{c|}{holds a pointer of data from} \\ |
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| 457 | \cline{1-1} \cline{2-2} FTrace\_EVT\_next\_chunk & 0xFF & |
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| 458 | \multicolumn{2}{c|}{previous event} \\ |
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| 459 | \hline |
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| 460 | \end{tabular} |
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| 461 | \end{center} |
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| 462 | \caption{Generic data events.} |
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| 463 | \end{table} |
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| 464 | |||
| 465 | \begin{table} |
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| 466 | \begin{center} |
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| 467 | \begin{tabular}{|l|c|} |
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| 468 | \hline Name & Code \\ \hline |
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| 469 | \hline FTrace\_filter\_trace\_Events & 0xF0 \\ |
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| 470 | \hline FTrace\_filter\_ipoint & 0xF1 \\ |
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| 471 | \hline FTrace\_filter\_task & 0xF2 \\ |
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| 472 | \hline FTrace\_filter\_interrupt & 0xF3 \\ |
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| 473 | \hline FTrace\_filter\_CPU & 0xF4 \\ |
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| 474 | \hline FTrace\_filter\_priority & 0xF5 \\ |
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| 475 | \hline FTrace\_filter\_mutex & 0xF6 \\ |
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| 476 | \hline FTrace\_filter\_signal & 0xF7 \\ |
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| 477 | \hline FTrace\_filter\_server & 0xF8 \\ |
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| 478 | \hline FTrace\_filter\_user & 0xF9 \\ |
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| 479 | \hline FTrace\_filter\_data & 0xFA \\ |
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| 480 | \hline FTrace\_filter\_timer & 0xFB \\ |
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| 481 | \hline FTrace\_family\_mask & 0x0F \\ |
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| 482 | \hline |
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| 483 | \end{tabular} |
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| 484 | \end{center} |
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| 485 | \caption{Filter management.} |
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| 486 | \label{tab:filter-events} |
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| 487 | \end{table} |
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| 488 | |||
| 489 | %---------------------------------------------------------------------------- |
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| 490 | \chapter{Example of Tracer usage} |
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| 491 | %---------------------------------------------------------------------------- |
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| 492 | |||
| 493 | \begin{verbatim} |
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| 494 | /* Declarations */ |
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| 495 | int a,b,c; |
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| 496 | SYS_FLAGS f; |
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| 497 | |||
| 498 | /* Create 3 chunks for storing the tracer events. */ |
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| 499 | a = FTrace_chunk_create(1000000, 1000000, FTRACE_CHUNK_FLAG_FREE | FTRACE_CHUNK_FLAG_CYC); |
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| 500 | b = FTrace_chunk_create(1000000, 1000000, FTRACE_CHUNK_FLAG_FREE | FTRACE_CHUNK_FLAG_JTN); |
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| 501 | c = FTrace_chunk_create(1000000, 1000000, FTRACE_CHUNK_FLAG_FREE | FTRACE_CHUNK_FLAG_CYC); |
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| 502 | |||
| 503 | FTrace_chunk_link(a,b); |
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| 504 | FTrace_chunk_link(b,c); |
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| 505 | |||
| 506 | /* Select the first chunk for saving the events. */ |
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| 507 | FTrace_actual_chunk_select(a); |
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| 508 | |||
| 509 | /* Start the tracer. */ |
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| 510 | FTrace_enable(); |
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| 511 | |||
| 512 | /* Enable filtering for timer related events. */ |
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| 513 | FTrace_set_filter(FTrace_filter_timer, 1); |
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| 514 | TRACER_LOGEVENT(FTrace_EVT_trace_start, proc_table[exec_shadow].context, clk_per_msec); |
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| 515 | |||
| 516 | for (i = 0; i < 10; i++) |
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| 517 | if (proc_table[i].context != 0) |
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| 518 | TRACER_LOGEVENT(FTrace_EVT_id, (unsigned short int)proc_table[i].context, i); |
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| 519 | |||
| 520 | /* do something */ |
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| 521 | |||
| 522 | /** Enable filtering for timer related events. */ |
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| 523 | FTrace_set_filter(FTrace_filter_timer, 0); |
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| 524 | |||
| 525 | /** Change the chunk where the events are stored. */ |
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| 526 | TRACER_LOGEVENT(FTrace_EVT_next_chunk, 0, 0); |
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| 527 | TRACER_LOGEVENT(FTrace_EVT_ipoint, 6000, 0); |
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| 528 | |||
| 529 | /* do something */ |
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| 530 | |||
| 531 | /* Store a TFrace stop event. */ |
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| 532 | TRACER_LOGEVENT(FTrace_EVT_trace_stop, 0, 0); |
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| 533 | |||
| 534 | /* Stop the tracer. */ |
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| 535 | FTrace_disable(); |
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| 536 | |||
| 537 | /* Initialize the network for remotely saving the trace. */ |
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| 538 | FTrace_OSD_init_udp(1, "192.168.1.10", "192.168.1.1"); |
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| 539 | |||
| 540 | /* |
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| 541 | * If want to save the events to disk, simply change |
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| 542 | * the network initialization instruction with the following line: |
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| 543 | * FTrace_init_disk_writer("trace.dat", 0, NULL, NULL); |
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| 544 | * |
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| 545 | */ |
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| 546 | |||
| 547 | /* Save the chunk. */ |
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| 548 | FTrace_send_chunk(a, 0, FTRACE_CHUNK_FLAG_FREE | FTRACE_CHUNK_FLAG_CYC); |
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| 549 | FTrace_send_chunk(b, 0, FTRACE_CHUNK_FLAG_FREE | FTRACE_CHUNK_FLAG_JTN); |
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| 550 | \end{verbatim} |
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| 551 | |||
| 552 | %---------------------------------------------------------------------------- |
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| 553 | \chapter{Tracer output} |
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| 554 | %---------------------------------------------------------------------------- |
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| 555 | |||
| 556 | When the trace is saved, locally or remotely, into a file, the |
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| 557 | resulting binary file appears as a sequence of bytes where each |
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| 558 | event stored within the trace output file is 16 bytes long. The |
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| 559 | format of each single event is depicted in Table \ref{tab:format}. |
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| 560 | |||
| 561 | The fields have the following meaning: |
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| 562 | |||
| 563 | \begin{itemize} |
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| 564 | \item Code represents the event type (see Chapter |
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| 565 | \ref{ch:Event-types-description} for the full list); |
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| 566 | \item Parameter 1 and 2 are the parameters used when \texttt{TRACER\_LOGEVENT} |
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| 567 | is invoked; |
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| 568 | \item TSC is the Time Stamp Counter associated with the event; |
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| 569 | \end{itemize} |
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| 570 | |||
| 571 | If \texttt{ptr} points to the first byte of an event, the correct TSC value |
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| 572 | can be obtained with the following instructions: |
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| 573 | |||
| 574 | \begin{verbatim} |
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| 575 | unsigned long long tsc_value; |
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| 576 | tsc_value = (unsigned long long)(*(unsigned int *)(ptr + 4)) << 32; |
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| 577 | tsc_value += (unsigned long long)(*(unsigned int *)(ptr + 8)); |
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| 578 | \end{verbatim} |
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| 579 | |||
| 580 | \begin{table} |
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| 581 | \begin{center}\begin{tabular}{|c|c|c|c|c|} |
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| 582 | \hline Code & Parameter 1 & TSC (high part) & TSC (low part) & Parameter 2 \\ |
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| 583 | \hline 2 bytes & 2 bytes & 4 bytes & 4 bytes & 4 bytes \\ |
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| 584 | \hline |
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| 585 | \end{tabular}\end{center} |
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| 586 | \caption{Event output file format.} |
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| 587 | \label{tab:format} |
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| 588 | \end{table} |
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| 589 | |||
| 590 | \printindex{} |
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| 591 | |||
| 592 | \bibliographystyle{alpha} |
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| 593 | \bibliography{../common/biblio} |
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| 594 | |||
| 595 | \end{document} |