From: Grant Slater <git@firefishy.com>
Date: Mon, 23 Mar 2015 18:43:16 +0000 (+0000)
Subject: Yevaud: Experimentally tune kernel job sched
X-Git-Url: https://git.openstreetmap.org/chef.git/commitdiff_plain/2a974b16c9839ef4ed868eb5db456dd6db20e66f?ds=sidebyside

Yevaud: Experimentally tune kernel job sched
---

diff --git a/roles/yevaud.rb b/roles/yevaud.rb
index ebcd86ad1..6d33455e4 100644
--- a/roles/yevaud.rb
+++ b/roles/yevaud.rb
@@ -88,6 +88,13 @@ default_attributes(
         "kernel.shmmax" => 4 * 1024 * 1024 * 1024,
         "kernel.shmall" => 4 * 1024 * 1024 * 1024 / 4096
       }
+    },
+    :cpu_tune => {
+      :comment => "Tune kern sched migration cost",
+      :parameters => {
+        "kernel.sched_autogroup_enabled" => 0,
+        "kernel.sched_migration_cost_ns" => 25000000
+      }
     }
   },
   :tile => {