be used to trace user variables such as the number of tasks in a server,
the number of clients in an application (for hosts), and so on.
+\li <b>\c TRACE_[host|link]_variable_declare_with_color (const char
+*var, const char *color)</b>: Same as \c
+TRACE_[host|link]_variable_declare, but user decides which color will
+be assigned to the variable. The color needs to be a string with three
+numbers separated by spaces in the range [0,1]. A light-gray color can
+be specified using "0.7 0.7 0.7" as color.
+
\li <b>\c TRACE_[host|link]_variable_[set|add|sub] (const char *[host|link], const char *variable, double value)</b>:
Set the value of a given user variable for a given host/link. The value
of this variable is always associated to the host/link. The host/link
--cfg=tracing/smpi/group:1
\endverbatim
-\li <b>\c
-tracing/msg/task
-</b>:
- This option only has effect if this simulator is MSG-based. It traces the
- behavior of all categorized MSG tasks, grouping them by hosts.
-\verbatim
---cfg=tracing/msg/task:1
-\endverbatim
-
\li <b>\c
tracing/msg/process
</b>:
--cfg=tracing/msg/process:1
\endverbatim
+\li <b>\c
+tracing/buffer
+</b>:
+ This option put some events in a time-ordered buffer using the
+ insertion sort algorithm. The process of acquiring and releasing
+ locks to access this buffer and the cost of the sorting algorithm
+ make this process slow. The simulator performance can be severely
+ impacted if this option is activated, but you are sure to get a trace
+ file with events sorted.
+\verbatim
+--cfg=tracing/buffer:1
+\endverbatim
+
+\li <b>\c
+tracing/onelink_only
+</b>:
+This option changes the way SimGrid register its platform on the trace
+file. Normally, the tracing considers all routes (no matter their
+size) on the platform file to re-create the resource topology. If this
+option is activated, only the routes with one link are used to
+register the topology within an AS. Routes among AS continue to be
+traced as usual.
+\verbatim
+--cfg=tracing/onelink_only:1
+\endverbatim
+
+\li <b>\c
+tracing/disable_destroy
+</b>:
+Disable the destruction of containers at the end of simulation. This
+can be used with simulators that have a different notion of time
+(different from the simulated time).
+\verbatim
+--cfg=tracing/disable_destroy:1
+\endverbatim
+
\li <b>\c
triva/categorized
</b>:
This option generates a graph configuration file for Triva considering
uncategorized resource utilization.
\verbatim
---cfg=triva/categorized:graph_uncategorized.plist
+--cfg=triva/uncategorized:graph_uncategorized.plist
\endverbatim
\subsection tracing_tracing_example_parameters Case studies
special configurations tunned to SimGrid needs. This part of the documentation
explains how to configure and use Triva to analyse a SimGrid trace file.
-- <b>Installing Triva</b>: the tool is available in the INRIAGforge,
+- <b>Installing Triva</b>: the tool is available in the Inria's Forge,
at <a href="http://triva.gforge.inria.fr">http://triva.gforge.inria.fr</a>.
Use the following command to get the sources, and then check the file
<i>INSTALL</i>. This file contains instructions to install
the tool's dependencies in a Ubuntu/Debian Linux. The tool can also
-be compiled in MacOSes natively, check <i>INSTALL.mac</i> file.
+be compiled in MacOSX natively, check <i>INSTALL.mac</i> file.
\verbatim
-$ svn checkout svn://scm.gforge.inria.fr/svn/triva
+$ git clone git://scm.gforge.inria.fr/triva/triva.git
$ cd triva
$ cat INSTALL
\endverbatim
when the checkbox <i>Update Drawings on Sliders
Change</i> is selected will not be followed.
-- <b>Understanding Triva - graph</b>: this part of the documention explains how
- to analyze the traces using the graph view of Triva, when the user executes
-the tool passing <em>--graph</em> as parameter. Triva opens three windows when
-this parameter is used: the <i>Time Interval</i> window (previously described),
-the <i>Graph Representation</i> window, and the <em>Graph Configuration</em>
-window. The Graph Representation is the window where drawings take place.
-Initially, it is completely white waiting for a proper graph configuration input
-by the user. We start the description of this type of analysis by describing the
-<i>Graph Configuration</i> window (depicted below). By using a particular
-configuration, triva
-can be used to customize the graph drawing according to
-the SimGrid trace that was created with user-specific categories. Before delving
-into the details of this customization, let us first explain the major parts of
-the graph configuration window. The buttons located in the top-right corner can
-be used to delete, copy and create a new configuration. The checkbox in the
-top-middle part of the window indicates if the configuration typed in the
-textfield is syntactically correct (we are using the non-XML
-<a href="http://en.wikipedia.org/wiki/Property_list">Property List Format</a> to
-describe the configuration). The pop-up button located on the top-left corner
-indicates the selected configuration (the user can have multiple graph
-configurations). The bottom-left text field contains the name of the current
-configuration (updates on this field must be followed by typing enter on the
-keyboard to take into account the name change). The bottom-right <em>Apply</em>
-button activates the current configuration, resulting on an update on the graph
-drawings.
-<center>
-\htmlonly
-<a href="triva-graph_configuration.png" border=0><img src="triva-graph_configuration.png" width="50%" border=0></a>
-\endhtmlonly
-</center>
-<b>Basic SimGrid Configuration</b>: The figure shows in the big textfield the
-basic configuration that should be used during the analysis of a SimGrid trace
-file. The basic logic of the configuration is as follows:
+- <b>Understanding Triva - graph</b>: one possibility to analyze
+ SimGrid traces is to use Triva's graph view, using the
+ <em>--graph</em> parameter to activate this view, and
+ <em>--gc_conf</em> with a graph configuration to customize the graph
+ according to the traces. A valid graph configuration (we are using
+ the non-XML <a
+ href="http://en.wikipedia.org/wiki/Property_list">Property List
+ Format</a> to describe the configuration) can be created for any
+ SimGrid-based simulator using the
+ <em>--cfg=triva/uncategorized:graph_uncategorized.plist</em> or
+ <em>--cfg=triva/categorized:graph_categorized.plist</em> (if the
+ simulator defines resource utilization categories) when executing
+ the simulation.
+
+<b>Basic SimGrid Configuration</b>: The basic description of the configuration
+is as follows:
\verbatim
{
- node = (HOST);
- edge = (LINK);
+ node = (LINK, HOST, );
+ edge = (HOST-LINK, LINK-HOST, LINK-LINK, );
\endverbatim
-The nodes of the graph will be created based on the <i>node</i> parameter, which
-in this case is the different <em>"HOST"</em>s of the platform
-used to simulate. The <i>edge</i> parameter indicates that the edges of the
-graph will be created based on the <em>"LINK"</em>s of the platform. After the
-definition of these two parameters, the configuration must detail how
-<em>HOST</em>s and <em>LINK</em>s should be drawn. For that, the configuration
-must have an entry for each of the types used. For <em>HOST</em>, as basic
-configuration, we have:
-\verbatim
- HOST = {
- size = power;
- scale = global;
- };
-\endverbatim
-The parameter <em>size</em> indicates which variable from the trace file will be
-used to define the size of the node HOST in the visualization. If the simulation
-was executed with availability traces, the size of the nodes will be changed
-according to these traces. The parameter <em>scale</em> indicates if the value
-of the variable is <em>global</em> or <em>local</em>. If it is global, the value
-will be relative to the power of all other hosts, if it is local, the value will
-be relative locally.
-For <em>LINK</em> we have:
-\verbatim
- LINK = {
- src = source;
- dst = destination;
-
- size = bandwidth;
- scale = global;
- };
-\endverbatim
-For the types specified in the <em>edge</em> parameter (such as <em>LINK</em>),
-the configuration must contain two additional parameters: <em>src</em> and
-<em>dst</em> that are used to properly identify which nodes this edge is
-connecting. The values <em>source</em> and <em>destination</em> are always present
-in the SimGrid trace file and should not be changed in the configuration. The
-parameter <em>size</em> for the LINK, in this case, is configured as the
-variable <em>bandwidth</em>, with a <em>global</em> scale. The scale meaning
-here is exactly the same used for nodes. The last parameter is the GraphViz
-algorithm used to calculate the position of the nodes in the graph
-representation.
-\verbatim
- graphviz-algorithm = neato;
-}
-\endverbatim
-<b>Customizing the Graph Representation</b>: triva is capable to handle
-a customized graph representation based on the variables present in the trace
-file. In the case of SimGrid, every time a category is created for tasks, two
-variables in the trace file are defined: one to indicate node utilization (how
-much power was used by that task category), and another to indicate link
-utilization (how much bandwidth was used by that category). For instance, if the
-user declares a category named <i>request</i>, there will be variables named
-<b>p</b><i>request</i> and a <b>b</b><i>request</i> (<b>p</b> for power and
-<b>b</b> for bandwidth). It is important to notice that the variable
-<i>prequest</i> in this case is only available for HOST, and
-<i>brequest</i> is only available for LINK. <b>Example</b>: suppose there are
-two categories for tasks: request and compute. To create a customized graph
-representation with a proportional separation of host and link utilization, use
-as configuration for HOST and LINK this:
-\verbatim
- HOST = {
- size = power;
- scale = global;
-
- sep_host = {
- type = separation;
- size = power;
- values = (prequest, pcomputation);
- };
- };
- LINK = {
- src = source;
- dst = destination;
- size = bandwidth;
- scale = global;
+The nodes of the graph will be created based on the <i>node</i>
+parameter, which in this case is the different <em>"HOST"</em>s and
+<em>"LINK"</em>s of the platform used to simulate. The <i>edge</i>
+parameter indicates that the edges of the graph will be created based
+on the <em>"HOST-LINK"</em>s, <em>"LINK-HOST"</em>s, and
+<em>"LINK-LINK"</em>s of the platform. After the definition of these
+two parameters, the configuration must detail how the nodes
+(<em>HOST</em>s and <em>LINK</em>s) should be drawn.
- sep_link = {
- type = separation;
- size = bandwidth;
- values = (brequest, bcomputation);
- };
- };
-\endverbatim
-Where <i>sep_host</i> contains a composition of type <i>separation</i> where
-its max size is the <i>power</i> of the host and the variables <i>prequest</i>
-and <i>pcomputation</i> are drawn proportionally to the size of the HOST. And
-<i>sep_link</i> is also a separation where max is defined as the
-<i>bandwidth</i> of the link, and the variables <i>brequest</i> and
-<i>bcomputation</i> are drawn proportionally within a LINK.
-<i>This configuration enables the analysis of resource utilization by MSG tasks,
-and the identification of load-balancing issues, network bottlenecks, for
-instance.</i> \n
-<b>Other compositions</b>: besides <i>separation</i>, it is possible to use
-other types of compositions, such as gradients, and colors, like this:
-\verbatim
- gra_host = {
- type = gradient;
- scale = global;
- values = (numberOfTasks);
- };
- color_host = {
- type = color;
- values = (is_server);
- };
-\endverbatim
-Where <i>gra_host</i> creates a gradient within a node of the graph, using a
-global scale and using as value a variable called <i>numberOfTasks</i>, that
-could be declared by the user using the optional tracing functions of SimGrid.
-If scale is global, the max and min value for the gradient will be equal to the
-max and min numberOfTasks among all hosts, and if scale is local, the max and
-min value based on the value of numberOfTasks locally in each host.
-And <i>color_host</i> composition draws a square based on a positive value of
-the variable <i>is_server</i>, that could also be defined by the user using the
-SimGrid tracing functions. \n
-<b>The Graph Visualization</b>: The next figure shows a graph visualization of a
-given time-slice of the masterslave_forwarder example (present in the SimGrid
-sources). The red color indicates tasks from the <i>compute</i> category. This
-visualization was generated with the following configuration:
-\verbatim
-{
- node = (HOST);
- edge = (LINK);
+For that, the configuration must have an entry for each of
+the types used. For <em>HOST</em>, as basic configuration, we have:
+\verbatim
HOST = {
+ type = square;
size = power;
- scale = global;
-
- sep_host = {
- type = separation;
- size = power;
- values = (pcompute, pfinalize);
- };
+ values = (power_used);
};
- LINK = {
- src = source;
- dst = destination;
- size = bandwidth;\section tracing_tracing Tracing Simulations for Visualization
-
-The trace visualization is widely used to observe and understand the behavior
-of parallel applications and distributed algorithms. Usually, this is done in a
-two-step fashion: the user instruments the application and the traces are
-analyzed after the end of the execution. The visualization itself can highlights
-unexpected behaviors, bottlenecks and sometimes can be used to correct
-distributed algorithms. The SimGrid team has instrumented the library
-in order to let users trace their simulations and analyze them. This part of the
-user manual explains how the tracing-related features can be enabled and used
-during the development of simulators using the SimGrid library.
-
-\subsection tracing_tracing_howitworks How it works
-
-For now, the SimGrid library is instrumented so users can trace the <b>platform
-utilization</b> using the MSG, SimDAG and SMPI interface. This means that the tracing will
-register how much power is used for each host and how much bandwidth is used for
-each link of the platform. The idea with this type of tracing is to observe the
-overall view of resources utilization in the first place, especially the
-identification of bottlenecks, load-balancing among hosts, and so on.
-
-The idea of the tracing facilities is to give SimGrid users to possibility to
-classify MSG and SimDAG tasks by category, tracing the platform utilization
-(hosts and links) for each of the categories. For that,
-the tracing interface enables the declaration of categories and a function to
-mark a task with a previously declared category. <em>The tasks that are not
-classified according to a category are not traced</em>. Even if the user
-does not specify any category, the simulations can still be traced in terms
-of resource utilization by using a special parameter that is detailed below.
-
-\subsection tracing_tracing_enabling Enabling using CMake
-
-With the sources of SimGrid, it is possible to enable the tracing
-using the parameter <b>-Denable_tracing=ON</b> when the cmake is executed.
-The section \ref tracing_tracing_functions describes all the functions available
-when this Cmake options is activated. These functions will have no effect
-if SimGrid is configured without this option (they are wiped-out by the
-C-preprocessor).
-
-\verbatim
-$ cmake -Denable_tracing=ON .
-$ make
\endverbatim
-\subsection tracing_tracing_functions Tracing Functions
-
-\li <b>\c TRACE_category (const char *category)</b>: This function should be used
-to define a user category. The category can be used to differentiate the tasks
-that are created during the simulation (for example, tasks from server1,
-server2, or request tasks, computation tasks, communication tasks).
-All resource utilization (host power and link bandwidth) will be
-classified according to the task category. Tasks that do not belong to a
-category are not traced. The color for the category that is being declared
-is random (use next function to specify a color).
-
-\li <b>\c TRACE_category_with_color (const char *category, const char *color)</b>: Same
-as TRACE_category, but let user specify a color encoded as a RGB-like string with
-three floats from 0 to 1. So, to specify a red color, the user can pass "1 0 0" as
-color parameter. A light-gray color can be specified using "0.7 0.7 0.7" as color.
-
-\li <b>\c TRACE_msg_set_task_category (m_task_t task, const char *category)</b>:
-This function should be called after the creation of a MSG task, to define the
-category of that task. The first parameter \c task must contain a task that was
-created with the function \c MSG_task_create. The second parameter
-\c category must contain a category that was previously defined by the function
-\c TRACE_category.
-
-\li <b>\c TRACE_sd_set_task_category (SD_task_t task, const char *category)</b>:
-This function should be called after the creation of a SimDAG task, to define the
-category of that task. The first parameter \c task must contain a task that was
-created with the function \c MSG_task_create. The second parameter
-\c category must contain a category that was previously defined by the function
-\c TRACE_category.
-
-\li <b>\c TRACE_[host|link]_variable_declare (const char *variable)</b>:
-Declare a user variable that will be associated to host/link. A variable can
-be used to trace user variables such as the number of tasks in a server,
-the number of clients in an application (for hosts), and so on.
-
-\li <b>\c TRACE_[host|link]_variable_[set|add|sub] (const char *[host|link], const char *variable, double value)</b>:
-Set the value of a given user variable for a given host/link. The value
-of this variable is always associated to the host/link. The host/link
-parameters should be its name as the one listed in the platform file.
-
-\li <b>\c TRACE_[host|link]_variable_[set|add|sub]_with_time (double time, const char *[host|link], const char *variable, double value)</b>:
-Same as TRACE_[host|link]_variable_[set|add|sub], but let user specify
-the time used to trace it. Users can specify a time that is not the
-simulated clock time as defined by the core simulator. This allows
-a fine-grain control of time definition, but should be used with
-caution since the trace can be inconsistent if resource utilization
-traces are also traced.
-
-\li <b>\c TRACE_link_srcdst_variable_[set|add|sub] (const char *src, const char *dst, const char *variable, double value)</b>:
-Same as TRACE_link_variable_[set|add|sub], but now users specify a source and
-destination hosts (as the names from the platform file). The tracing library
-will get the corresponding route that connects those two hosts (src and dst) and
-[set|add|sub] the value's variable for all the links of the route.
-
-\li <b>\c TRACE_link_srcdst_variable_[set|add|sub]_with_time (double time, const char *src, const char *dst, const char *variable, double value)</b>:
-Same as TRACE_link_srcdst_variable_[set|add|sub], but user specify a time different from the simulated time.
-
-\subsection tracing_tracing_options Tracing configuration Options
-
-These are the options accepted by the tracing system of SimGrid:
-
-\li <b>\c
-tracing
-</b>:
- Safe switch. It activates (or deactivates) the tracing system.
- No other tracing options take effect if this one is not activated.
-
-\li <b>\c
-tracing/platform
-</b>:
- Register the simulation platform in the trace file.
-
-\li <b>\c
-tracing/onelink_only
-</b>:
- By default, the tracing system uses all routes in the platform file
- to re-create a "graph" of the platform and register it in the trace file.
- This option let the user tell the tracing system to use only the routes
- that are composed with just one link.
-
-\li <b>\c
-tracing/categorized
-</b>:
- It activates the categorized resource utilization tracing. It should
- be enabled if tracing categories are used by this simulator.
+The parameter <em>size</em> indicates which variable from the trace
+file will be used to define the size of the node HOST in the
+visualization. If the simulation was executed with availability
+traces, the size of the nodes will be changed according to these
+traces. The parameter <em>type</em> indicates which geometrical shape
+will be used to represent HOST, and the <em>values</em> parameter
+indicates which values from the trace will be used to fill the shape.
-\li <b>\c
-tracing/uncategorized
-</b>:
- It activates the uncategorized resource utilization tracing. Use it if
- this simulator do not use tracing categories and resource use have to be
- traced.
-
-\li <b>\c
-tracing/filename
-</b>:
- A file with this name will be created to register the simulation. The file
- is in the Paje format and can be analyzed using Triva or Paje visualization
- tools. More information can be found in these webpages:
- <a href="http://triva.gforge.inria.fr/">http://triva.gforge.inria.fr/</a>
- <a href="http://paje.sourceforge.net/">http://paje.sourceforge.net/</a>
-
-\li <b>\c
-tracing/smpi
-</b>:
- This option only has effect if this simulator is SMPI-based. Traces the MPI
- interface and generates a trace that can be analyzed using Gantt-like
- visualizations. Every MPI function (implemented by SMPI) is transformed in a
- state, and point-to-point communications can be analyzed with arrows.
-
-\li <b>\c
-tracing/smpi/group
-</b>:
- This option only has effect if this simulator is SMPI-based. The processes
- are grouped by the hosts where they were executed.
-
-\li <b>\c
-tracing/msg/task
-</b>:
- This option only has effect if this simulator is MSG-based. It traces the
- behavior of all categorized MSG tasks, grouping them by hosts.
-
-\li <b>\c
-tracing/msg/process
-</b>:
- This option only has effect if this simulator is MSG-based. It traces the
- behavior of all categorized MSG processes, grouping them by hosts. This option
- can be used to track process location if this simulator has process migration.
-
-
-\li <b>\c
-triva/categorized:graph_categorized.plist
-</b>:
- This option generates a graph configuration file for Triva considering
- categorized resource utilization.
-
-\li <b>\c
-triva/uncategorized:graph_uncategorized.plist
-</b>:
- This option generates a graph configuration file for Triva considering
- uncategorized resource utilization.
-
-\subsection tracing_tracing_example Example of Instrumentation
-
-A simplified example using the tracing mandatory functions.
-
-\verbatim
-int main (int argc, char **argv)
-{
- MSG_global_init (&argc, &argv);
-
- //(... after deployment ...)
-
- //note that category declaration must be called after MSG_create_environment
- TRACE_category_with_color ("request", "1 0 0");
- TRACE_category_with_color ("computation", "0.3 1 0.4");
- TRACE_category ("finalize");
-
- m_task_t req1 = MSG_task_create("1st_request_task", 10, 10, NULL);
- m_task_t req2 = MSG_task_create("2nd_request_task", 10, 10, NULL);
- m_task_t req3 = MSG_task_create("3rd_request_task", 10, 10, NULL);
- m_task_t req4 = MSG_task_create("4th_request_task", 10, 10, NULL);
- TRACE_msg_set_task_category (req1, "request");
- TRACE_msg_set_task_category (req2, "request");
- TRACE_msg_set_task_category (req3, "request");
- TRACE_msg_set_task_category (req4, "request");
-
- m_task_t comp = MSG_task_create ("comp_task", 100, 100, NULL);
- TRACE_msg_set_task_category (comp, "computation");
-
- m_task_t finalize = MSG_task_create ("finalize", 0, 0, NULL);
- TRACE_msg_set_task_category (finalize, "finalize");
-
- //(...)
-
- MSG_clean();
- return 0;
-}
-\endverbatim
-
-\subsection tracing_tracing_analyzing Analyzing the SimGrid Traces
-
-The SimGrid library, during an instrumented simulation, creates a trace file in
-the Paje file format that contains the platform utilization for the simulation
-that was executed. The visualization analysis of this file is performed with the
-visualization tool <a href="http://triva.gforge.inria.fr">Triva</a>, with
-special configurations tunned to SimGrid needs. This part of the documentation
-explains how to configure and use Triva to analyse a SimGrid trace file.
-
-- <b>Installing Triva</b>: the tool is available in the INRIAGforge,
-at <a href="http://triva.gforge.inria.fr">http://triva.gforge.inria.fr</a>.
-Use the following command to get the sources, and then check the file
-<i>INSTALL</i>. This file contains instructions to install
-the tool's dependencies in a Ubuntu/Debian Linux. The tool can also
-be compiled in MacOSes natively, check <i>INSTALL.mac</i> file.
-\verbatim
-$ svn checkout svn://scm.gforge.inria.fr/svn/triva
-$ cd triva
-$ cat INSTALL
-\endverbatim
-
-- <b>Executing Triva</b>: a binary called <i>Triva</i> is available after the
- installation (you can execute it passing <em>--help</em> to check its
-options). If the triva binary is not available after following the
-installation instructions, you may want to execute the following command to
-initialize the GNUstep environment variables. We strongly recommend that you
-use the latest GNUstep packages, and not the packages available through apt-get
-in Ubuntu/Debian packaging systems. If you install GNUstep using the latest
-available packages, you can execute this command:
-\verbatim
-$ source /usr/GNUstep/System/Library/Makefiles/GNUstep.sh
-\endverbatim
-You should be able to see this output after the installation of triva:
-\verbatim
-$ ./Triva.app/Triva --help
-Usage: Triva [OPTIONS...] TRACE0 [TRACE1]
-Trace Analysis through Visualization
-
-TimeInterval
- --ti_frequency {double} Animation: frequency of updates
- --ti_hide Hide the TimeInterval window
- --ti_forward {double} Animation: value to move time-slice
- --ti_apply Apply the configuration
- --ti_update Update on slider change
- --ti_animate Start animation
- --ti_start {double} Start of time slice
- --ti_size {double} Size of time slice
-Triva
- --comparison Compare Trace Files (Experimental)
- --graph Configurable Graph
- --list Print Trace Type Hierarchy
- --hierarchy Export Trace Type Hierarchy (dot)
- --stat Trace Statistics and Memory Utilization
- --instances List All Trace Entities
- --linkview Link View (Experimental)
- --treemap Squarified Treemap
- --merge Merge Trace Files (Experimental)
- --check Check Trace File Integrity
-GraphConfiguration
- --gc_conf {file} Graph Configuration in Property List Format
- --gc_apply Apply the configuration
- --gc_hide Hide the GraphConfiguration window
-\endverbatim
-Triva expects that the user choose one of the available options
-(currently <em>--graph</em> or <em>--treemap</em> for a visualization analysis)
-and the trace file from the simulation.
-
-- <b>Understanding Triva - time-slice</b>: the analysis of a trace file using
- the tool always takes into account the concept of the <em>time-slice</em>.
-This concept means that what is being visualized in the screen is always
-calculated considering a specific time frame, with its beggining and end
-timestamp. The time-slice is configured by the user and can be changed
-dynamically through the window called <em>Time Interval</em> that is opened
-whenever a trace file is being analyzed. The next figure depicts the time-slice
-configuration window.
-In the top of the window, in the space named <i>Trace Time</i>,
-the two fields show the beggining of the trace (which usually starts in 0) and
-the end (that depends on the time simulated by SimGrid). The middle of the
-window, in the square named <i>Time Slice Configuration</i>, contains the
-aspects related to the time-slice, including its <i>start</i> and its
-<i>size</i>. The gray rectangle in the bottom of this part indicates the
-<i>current time-slice</i> that is considered for the drawings. If the checkbox
-<i>Update Drawings on Sliders Change</i> is not selected, the button
-<i>Apply</i> must be clicked in order to inform triva that the
-new time-slice must be considered. The bottom part of the window, in the space
-indicated by the square <i>Time Slice Animation</i> can be used to advance
-the time-frame automatically. The user configures the amount of time that the
-time-frame will forward and how frequent this update will happen. Once this is
-configured, the user clicks the <i>Play</i> button in order to see the dynamic
-changes on the drawings.
-<center>
-\htmlonly
-<a href="triva-time_interval.png" border=0><img src="triva-time_interval.png" width="50%" border=0></a>
-\endhtmlonly
-</center>
-<b>Remarks:</b> when the trace has too many hosts or links, the computation to
-take into account a new time-slice can be expensive. When this happens, the
-<i>Frequency</i> parameter, but also updates caused by change on configurations
-when the checkbox <i>Update Drawings on Sliders
-Change</i> is selected will not be followed.
-
-- <b>Understanding Triva - graph</b>: this part of the documention explains how
- to analyze the traces using the graph view of Triva, when the user executes
-the tool passing <em>--graph</em> as parameter. Triva opens three windows when
-this parameter is used: the <i>Time Interval</i> window (previously described),
-the <i>Graph Representation</i> window, and the <em>Graph Configuration</em>
-window. The Graph Representation is the window where drawings take place.
-Initially, it is completely white waiting for a proper graph configuration input
-by the user. We start the description of this type of analysis by describing the
-<i>Graph Configuration</i> window (depicted below). By using a particular
-configuration, triva
-can be used to customize the graph drawing according to
-the SimGrid trace that was created with user-specific categories. Before delving
-into the details of this customization, let us first explain the major parts of
-the graph configuration window. The buttons located in the top-right corner can
-be used to delete, copy and create a new configuration. The checkbox in the
-top-middle part of the window indicates if the configuration typed in the
-textfield is syntactically correct (we are using the non-XML
-<a href="http://en.wikipedia.org/wiki/Property_list">Property List Format</a> to
-describe the configuration). The pop-up button located on the top-left corner
-indicates the selected configuration (the user can have multiple graph
-configurations). The bottom-left text field contains the name of the current
-configuration (updates on this field must be followed by typing enter on the
-keyboard to take into account the name change). The bottom-right <em>Apply</em>
-button activates the current configuration, resulting on an update on the graph
-drawings.
-<center>
-\htmlonly
-<a href="triva-graph_configuration.png" border=0><img src="triva-graph_configuration.png" width="50%" border=0></a>
-\endhtmlonly
-</center>
-<b>Basic SimGrid Configuration</b>: The figure shows in the big textfield the
-basic configuration that should be used during the analysis of a SimGrid trace
-file. The basic logic of the configuration is as follows:
-\verbatim
-{
- node = (HOST);
- edge = (LINK);
-\endverbatim
-The nodes of the graph will be created based on the <i>node</i> parameter, which
-in this case is the different <em>"HOST"</em>s of the platform
-used to simulate. The <i>edge</i> parameter indicates that the edges of the
-graph will be created based on the <em>"LINK"</em>s of the platform. After the
-definition of these two parameters, the configuration must detail how
-<em>HOST</em>s and <em>LINK</em>s should be drawn. For that, the configuration
-must have an entry for each of the types used. For <em>HOST</em>, as basic
-configuration, we have:
-\verbatim
- HOST = {
- size = power;
- scale = global;
- };
-\endverbatim
-The parameter <em>size</em> indicates which variable from the trace file will be
-used to define the size of the node HOST in the visualization. If the simulation
-was executed with availability traces, the size of the nodes will be changed
-according to these traces. The parameter <em>scale</em> indicates if the value
-of the variable is <em>global</em> or <em>local</em>. If it is global, the value
-will be relative to the power of all other hosts, if it is local, the value will
-be relative locally.
For <em>LINK</em> we have:
-\verbatim
+
+\verbatim
LINK = {
- src = source;
- dst = destination;
-
+ type = rhombus;
size = bandwidth;
- scale = global;
+ values = (bandwidth_used);
};
-\endverbatim
-For the types specified in the <em>edge</em> parameter (such as <em>LINK</em>),
-the configuration must contain two additional parameters: <em>src</em> and
-<em>dst</em> that are used to properly identify which nodes this edge is
-connecting. The values <em>source</em> and <em>destination</em> are always present
-in the SimGrid trace file and should not be changed in the configuration. The
-parameter <em>size</em> for the LINK, in this case, is configured as the
-variable <em>bandwidth</em>, with a <em>global</em> scale. The scale meaning
-here is exactly the same used for nodes. The last parameter is the GraphViz
-algorithm used to calculate the position of the nodes in the graph
-representation.
-\verbatim
- graphviz-algorithm = neato;
}
\endverbatim
+
+The same configuration parameters are used here: <em>type</em> (with a
+rhombus), the <em>size</em> (whose value is from trace's bandwidth
+variable) and the <em>values</em>.
+
<b>Customizing the Graph Representation</b>: triva is capable to handle
a customized graph representation based on the variables present in the trace
file. In the case of SimGrid, every time a category is created for tasks, two
two categories for tasks: request and compute. To create a customized graph
representation with a proportional separation of host and link utilization, use
as configuration for HOST and LINK this:
+
\verbatim
HOST = {
+ type = square;
size = power;
- scale = global;
-
- sep_host = {
- type = separation;
- size = power;
- values = (prequest, pcomputation);
- };
+ values = (prequest, pcomputation);
};
-
LINK = {
- src = source;
- dst = destination;
+ type = rhombus;
size = bandwidth;
- scale = global;
-
- sep_link = {
- type = separation;
- size = bandwidth;
- values = (brequest, bcomputation);
- };
+ values = (brequest, bcomputation);
};
\endverbatim
-Where <i>sep_host</i> contains a composition of type <i>separation</i> where
-its max size is the <i>power</i> of the host and the variables <i>prequest</i>
-and <i>pcomputation</i> are drawn proportionally to the size of the HOST. And
-<i>sep_link</i> is also a separation where max is defined as the
-<i>bandwidth</i> of the link, and the variables <i>brequest</i> and
-<i>bcomputation</i> are drawn proportionally within a LINK.
-<i>This configuration enables the analysis of resource utilization by MSG tasks,
+
+This configuration enables the analysis of resource utilization by MSG tasks,
and the identification of load-balancing issues, network bottlenecks, for
-instance.</i> \n
-<b>Other compositions</b>: besides <i>separation</i>, it is possible to use
-other types of compositions, such as gradients, and colors, like this:
-\verbatim
- gra_host = {
- type = gradient;
- scale = global;
- values = (numberOfTasks);
- };
- color_host = {
- type = color;
- values = (is_server);
- };
-\endverbatim
-Where <i>gra_host</i> creates a gradient within a node of the graph, using a
-global scale and using as value a variable called <i>numberOfTasks</i>, that
-could be declared by the user using the optional tracing functions of SimGrid.
-If scale is global, the max and min value for the gradient will be equal to the
-max and min numberOfTasks among all hosts, and if scale is local, the max and
-min value based on the value of numberOfTasks locally in each host.
-And <i>color_host</i> composition draws a square based on a positive value of
-the variable <i>is_server</i>, that could also be defined by the user using the
-SimGrid tracing functions. \n
+instance. \n
+
<b>The Graph Visualization</b>: The next figure shows a graph visualization of a
given time-slice of the masterslave_forwarder example (present in the SimGrid
sources). The red color indicates tasks from the <i>compute</i> category. This
visualization was generated with the following configuration:
+
\verbatim
{
- node = (HOST);
- edge = (LINK);
+ node = (LINK, HOST, );
+ edge = (HOST-LINK, LINK-HOST, LINK-LINK, );
- HOST = {
+ host = {
+ type = square;
size = power;
- scale = global;
-
- sep_host = {
- type = separation;
- size = power;
- values = (pcompute, pfinalize);
- };
+ values = (pcompute, pfinalize);
};
- LINK = {
- src = source;
- dst = destination;
+ link = {
+ type = rhombus;
size = bandwidth;
- scale = global;
-
- sep_link = {
- type = separation;
- size = bandwidth;
- values = (bcompute, bfinalize);
- };
+ values = (bcompute, bfinalize);
};
- graphviz-algorithm = neato;
}
\endverbatim
-<center>
-\htmlonly
-<a href="triva-graph_visualization.png" border=0><img src="triva-graph_visualization.png" width="50%" border=0></a>
-\endhtmlonly
-</center>
-- <b>Understading Triva - colors</b>: An important issue when using Triva is how
- to define colors. To do that, we have to know which variables are defined in
-the trace file generated by the SimGrid library. The parameter <em>--list</em>
-lists the variables for a given trace file:
-\verbatim
-$ Triva -l masterslave_forwarder.trace
-iFile
-c platform
-c HOST
-v power
-v is_slave
-v is_master
-v task_creation
-v task_computation
-v pcompute
-v pfinalize
-c LINK
-v bandwidth
-v latency
-v bcompute
-v bfinalize
-c user_type
-\endverbatim
-We can see that HOST has seven variables (from power to pfinalize) and LINK has
-four (from bandwidth to bfinalize). To define a red color for the
-<i>pcompute</i> and <i>bcompute</i> (which are defined based on user category
-<i>compute</i>), execute:
-\verbatim
-$ defaults write Triva 'pcompute Color' '1 0 0'
-$ defaults write Triva 'bcompute Color' '1 0 0'
-\endverbatim
-Where the three numbers in each line are the RGB color with values from 0 to 1.
-\verbatim
- scale = global;
-
- sep_link = {
- type = separation;
- size = bandwidth;
- values = (bcompute, bfinalize);
- };
- };
- graphviz-algorithm = neato;
-}
-\endverbatim
<center>
\htmlonly
<a href="triva-graph_visualization.png" border=0><img src="triva-graph_visualization.png" width="50%" border=0></a>
\endhtmlonly
</center>
-- <b>Understading Triva - colors</b>: An important issue when using Triva is how
- to define colors. To do that, we have to know which variables are defined in
-the trace file generated by the SimGrid library. The parameter <em>--list</em>
-lists the variables for a given trace file:
-\verbatim
-$ Triva -l masterslave_forwarder.trace
-iFile
-c platform
-c HOST
-v power
-v is_slave
-v is_master
-v task_creation
-v task_computation
-v pcompute
-v pfinalize
-c LINK
-v bandwidth
-v latency
-v bcompute
-v bfinalize
-c user_type
-\endverbatim
-We can see that HOST has seven variables (from power to pfinalize) and LINK has
-four (from bandwidth to bfinalize). To define a red color for the
-<i>pcompute</i> and <i>bcompute</i> (which are defined based on user category
-<i>compute</i>), execute:
-\verbatim
-$ defaults write Triva 'pcompute Color' '1 0 0'
-$ defaults write Triva 'bcompute Color' '1 0 0'
-\endverbatim
-Where the three numbers in each line are the RGB color with values from 0 to 1.
+- <b>Understading Triva - colors</b>: Colors are now registered in
+trace files. See the tracing API to how to define them for your
+simulator.
-*/
\ No newline at end of file
+*/
