From: Arnaud Giersch <arnaud.giersch@iut-bm.univ-fcomte.fr>
Date: Mon, 11 Feb 2013 15:08:36 +0000 (+0100)
Subject: Be more precise in platform description.
X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/loba-papers.git/commitdiff_plain/f622eef95fe3973773527fa3260b7563a498ec60

Be more precise in platform description.
---

diff --git a/supercomp11/supercomp11.tex b/supercomp11/supercomp11.tex
index 1faf1b0..db3e809 100644
--- a/supercomp11/supercomp11.tex
+++ b/supercomp11/supercomp11.tex
@@ -251,7 +251,7 @@ he proceeds as following.
 \section{Other strategies}
 \label{Other}
 
-\FIXME{Réécrire en angliche.}
+\FIXME{Réécrire en anglais.}
 
 % \FIXME{faut-il décrire les stratégies makhoul et simple ?}
 
@@ -508,16 +508,21 @@ settings, we simulated the executions on two sorts of platforms.  These two
 sorts of platforms differ by their underlaid network topology.  On the one hand,
 we have homogeneous platforms, modeled as a cluster.  On the other hand, we have
 heterogeneous platforms, modeled as the interconnection of a number of clusters.
+
+The clusters were modeled by a fixed number of computing nodes interconnected
+through a backbone link.  Each computing node has a computing power of
+1~GFlop/s, and is connected to the backbone by a network link whose bandwidth is
+of 125~MB/s, with a latency of 50~$\mu$s.  The backbone has a network bandwidth
+of 2.25~GB/s, with a latency of 500~$\mu$s.
+
 The heterogeneous platform descriptions were created by taking a subset of the
 Grid'5000 infrastructure\footnote{Grid'5000 is a French large scale experimental
   Grid (see \url{https://www.grid5000.fr/}).}, as described in the platform file
 \texttt{g5k.xml} distributed with SimGrid.  Note that the heterogeneity of the
-platform only comes from the network topology.  The processor speeds, and
-network bandwidths were normalized since our algorithms currently are not aware
-of such heterogeneity.  We arbitrarily chose to fix the processor speed to
-1~GFlop/s, and the network bandwidth to 125~MB/s, with a latency of 50~$\mu$s,
-except for the links between geographically distant sites, where the network
-bandwidth was fixed to 2.25~GB/s, with a latency of 500~$\mu$s.
+platform here only comes from the network topology.  Indeed, since our
+algorithms currently do not handle heterogeneous computing resources, the
+processor speeds were normalized, and we arbitrarily chose to fix them to
+1~GFlop/s.
 
 Then we derived each sort of platform with four different number of computing
 nodes: 16, 64, 256, and 1024 nodes.
@@ -658,4 +663,4 @@ Taille : 10 100 très gros
 
 % LocalWords:  Raphaël Couturier Arnaud Giersch Abderrahmane Sider Franche ij
 % LocalWords:  Bertsekas Tsitsiklis SimGrid DASUD Comté Béjaïa asynchronism ji
-% LocalWords:  ik isend irecv Cortés et al chan ctrl fifo Makhoul
+% LocalWords:  ik isend irecv Cortés et al chan ctrl fifo Makhoul GFlop xml