From: Martin Quinson Date: Tue, 20 Jun 2017 09:22:20 +0000 (+0200) Subject: a word about the energy model accuracy X-Git-Tag: v3.16~21 X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/5465a5d150dd76dc4ce18c2c79bc66705b874bef a word about the energy model accuracy --- diff --git a/src/surf/plugins/host_energy.cpp b/src/surf/plugins/host_energy.cpp index 42efb75fba..f6669114ae 100644 --- a/src/surf/plugins/host_energy.cpp +++ b/src/surf/plugins/host_energy.cpp @@ -102,6 +102,16 @@ This encodes the following values To change the pstate of a given CPU, use the following functions: #MSG_host_get_nb_pstates(), simgrid#s4u#Host#setPstate(), #MSG_host_get_power_peak_at(). +### How accurate are these models? + +This model cannot be more accurate than your instantiation: +with the default values, your result will not be accurate at all. You can still get +accurate energy prediction, provided that you carefully instantiate the model. +The first step is to ensure that your timing prediction match perfectly. But this +is only the first step of the path, and you really want to read +this paper to see all what you need +to do before you can get accurate energy predictions. + */ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_energy, surf, "Logging specific to the SURF energy plugin");