From 489bcae35330739133ed32fb9b120a3b92e752d0 Mon Sep 17 00:00:00 2001 From: Augustin Degomme Date: Tue, 21 Oct 2014 14:27:28 +0200 Subject: [PATCH] doc update --- doc/doxygen/options.doc | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/doc/doxygen/options.doc b/doc/doxygen/options.doc index 82776a5768..6abd7455fa 100644 --- a/doc/doxygen/options.doc +++ b/doc/doxygen/options.doc @@ -95,6 +95,11 @@ described in settings (accurate modeling of slow start with correction factors on three intervals: < 1KiB, < 64 KiB, >= 64 KiB). See also \ref options_model_network_coefs "this section" for more info. + - \b IB: Realistic network model specifically tailored for HPC + settings with InfiniBand networks (accurate modeling contention + behavior, based on the model explained in + http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf). + See also \ref options_model_network_coefs "this section" for more info. - \b CM02: Legacy network analytic model (Very similar to LV08, but without corrective factors. The timings of small messages are thus poorly modeled) @@ -208,6 +213,12 @@ If you are using the SMPI model, these correction coeficients are themselves corrected by constant values depending on the size of the exchange. Again, only hardcore experts should bother about this fact. +InfiniBand network behavior can be modeled through 3 parameters, as explained in +http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf . These +factors can be changed through option smpi/IB_penalty_factors:"βe;βs;γs". By +default SMPI uses factors computed one Stampede cluster from TACC, with optimal +deployment of processes on nodes. + \subsubsection options_model_network_crosstraffic Simulating cross-traffic As of SimGrid v3.7, cross-traffic effects can be taken into account in -- 2.20.1