From: Christian Heinrich <franz-christian.heinrich@inria.fr>
Date: Wed, 8 Aug 2018 12:41:48 +0000 (+0200)
Subject: [DVFS] Make sure pstate is never smaller than minimum
X-Git-Tag: v3_21~266^2~3
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/5fbcc8187930f5aa9b86216d40c7abe9acfef1a1?hp=62a05c9884fc879aac3dfc0d11caaf7fb929e6f3

[DVFS] Make sure pstate is never smaller than minimum
---

diff --git a/src/plugins/host_dvfs.cpp b/src/plugins/host_dvfs.cpp
index c4d4d70fe4..ab8d054b4b 100644
--- a/src/plugins/host_dvfs.cpp
+++ b/src/plugins/host_dvfs.cpp
@@ -192,7 +192,9 @@ public:
        */
       // Load is now < freq_up_threshold; exclude pstate 0 (the fastest)
       // because pstate 0 can only be selected if load > freq_up_threshold_
-      int new_pstate = max_pstate - load * (max_pstate + 1);
+      int new_pstate = get_max_pstate() - load * (get_max_pstate() + 1);
+      if (new_pstate < get_min_pstate())
+        new_pstate = get_min_pstate();
       get_host()->set_pstate(new_pstate);
 
       XBT_DEBUG("Load: %f < threshold: %f --> changed to pstate %i", load, freq_up_threshold_, new_pstate);