is in charge of distributing some computational tasks to a set of
**workers** that execute them.
-.. image:: /images/tuto-masterworkers-intro.svg
+.. image:: /tuto_s4u/img/intro.svg
:align: center
We first present a round-robin version of this application, where the
whether this is a good algorithm to dispatch tasks to the workers.
This very simple setting raises many interesting questions:
-.. image:: /images/tuto-masterworkers-question.svg
+.. image:: /tuto_s4u/img/question.svg
:align: center
- Which algorithm should the master use? Or should the worker decide
concurrence and showing resource usage over a long period of time. It
was obtained with the Triva software.
-.. image:: /images/tuto-masterworkers-result.png
+.. image:: /tuto_s4u/img/result.png
:align: center
Prerequisite
............
Before your proceed, you need to :ref:`install SimGrid <install>`, a
-C++ compiler and also ``pajeng`` to visualize the traces. The provided
-code template requires cmake to compile. On Debian and Ubuntu for
-example, you can get them as follows:
+C++ compiler and also ``pajeng`` to visualize the traces. You may want
+to install `Vite <http://vite.gforge.inria.fr/>`_ to get a first
+glance at the traces. The provided code template requires cmake to
+compile. On Debian and Ubuntu for example, you can get them as
+follows:
.. code-block:: shell
- sudo apt install simgrid pajeng cmake g++
+ sudo apt install simgrid pajeng cmake g++ vite
An initial version of the source code is provided on framagit. This
template compiles with cmake. If SimGrid is correctly installed, you
``/opt/simgrid/bin/simgrid-colorizer``. If you did not install it at all,
you can find it in <simgrid_root_directory>/bin/colorize.
-.. todo::
+For a classical Gantt-Chart vizualisation, you can use `Vite
+<http://vite.gforge.inria.fr/>`_ as follows:
+
+.. code-block:: shell
+
+ ./master-workers small_platform.xml master-workers_d.xml --cfg=tracing:yes --cfg=tracing/msg/process:yes
+ vite simgrid.trace
+
+.. image:: /tuto_s4u/img/vite-screenshot.png
+ :align: center
+
+But if you want the full power to visualize SimGrid traces, you need
+to use R. As a start, you can download this `starter script
+<https://framagit.org/simgrid/simgrid/raw/master/docs/source/tuto_s4u/draw_gantt.R>`_
+and use it as follows:
+
+.. code-block:: shell
+
+ ./master-workers small_platform.xml master-workers_d.xml --cfg=tracing:yes --cfg=tracing/msg/process:yes
+ pj_dump --ignore-incomplete-links simgrid.trace | grep STATE > gantt.csv
+ Rscript draw_gantt.R gantt.csv
+
+It produces a ``Rplots.pdf`` with the following content:
+
+.. image:: /tuto_s4u/img/Rscript-screenshot.png
+ :align: center
- Explain how to generate a Gantt-Chart with S4U and pajeng.
Lab 1: Simpler deployments
--------------------------
Lab 2: Using the whole platform
--------------------------
+-------------------------------
It is now easier to add a new worker, but you still has to do it
manually. It would be much easier if the master could start the
--- /dev/null
+#!/usr/bin/env Rscript
+args = commandArgs(trailingOnly=TRUE)
+library(ggplot2)
+df = read.csv(args[1], header=F, strip.white=T)
+names(df) = c("Type", "Actor", "Container", "Start", "End", "Duration", "Level", "State");
+ggplot(df) +
+ geom_segment(aes(x=Start, xend=End,
+ y=Actor, yend=Actor,color=State), size=5) +
+ scale_fill_brewer(palette="Set1") +
+ theme_bw() +
+ theme (
+ plot.margin = unit(c(0,0,0,0), "cm"),
+ legend.spacing = unit(1, "mm"),
+ panel.grid = element_blank(),
+ legend.position = "top",
+ legend.justification = "left",
+ legend.box.spacing = unit(0, "pt"),
+ legend.box.margin = margin(0,0,0,0)) -> p;
+
+p.height <- length(unique(df$Actor)) * 0.05 + 2;
+pdf(height = p.height)
+plot(p)
+dev.off()
