From 9f27192ef7e2ad5d30cdc3eb9c892fa52dcfd1c5 Mon Sep 17 00:00:00 2001
From: Grant Slater <git@firefishy.com>
Date: Sat, 8 Feb 2014 07:38:47 +0000
Subject: [PATCH] Add KVM guest sysctl tuning

---
 roles/jakelong.rb  | 9 +++++++++
 roles/nadder-01.rb | 9 +++++++++
 roles/nadder-02.rb | 9 +++++++++
 roles/nepomuk.rb   | 9 +++++++++
 4 files changed, 36 insertions(+)

diff --git a/roles/jakelong.rb b/roles/jakelong.rb
index 5338778e0..ee7a14c20 100644
--- a/roles/jakelong.rb
+++ b/roles/jakelong.rb
@@ -26,6 +26,15 @@ default_attributes(
     :cache_mem => "650 MB",
     :cache_dir => "coss /store/squid/coss-01 15000 block-size=8192 max-size=262144 membufs=30"
   },
+  :sysctl => {
+    :kvm => {
+      :comment => "Tuning for KVM guest",
+      :parameters => { 
+        "kernel.sched_min_granularity_ns" => 10000000,
+        "kernel.sched_wakeup_granularity_ns" => 15000000
+      }
+    }
+  },
   :sysfs => {
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
diff --git a/roles/nadder-01.rb b/roles/nadder-01.rb
index d596a1a6e..235575c7e 100644
--- a/roles/nadder-01.rb
+++ b/roles/nadder-01.rb
@@ -14,6 +14,15 @@ default_attributes(
       }
     }
   },
+  :sysctl => {
+    :kvm => {
+      :comment => "Tuning for KVM guest",
+      :parameters => { 
+        "kernel.sched_min_granularity_ns" => 10000000,
+        "kernel.sched_wakeup_granularity_ns" => 15000000
+      }
+    }
+  },
   :sysfs => {
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
diff --git a/roles/nadder-02.rb b/roles/nadder-02.rb
index 07c2c7145..ee98b08a5 100644
--- a/roles/nadder-02.rb
+++ b/roles/nadder-02.rb
@@ -14,6 +14,15 @@ default_attributes(
       }
     }
   },
+  :sysctl => {
+    :kvm => {
+      :comment => "Tuning for KVM guest",
+      :parameters => { 
+        "kernel.sched_min_granularity_ns" => 10000000,
+        "kernel.sched_wakeup_granularity_ns" => 15000000
+      }
+    }
+  },
   :sysfs => {
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
diff --git a/roles/nepomuk.rb b/roles/nepomuk.rb
index 3c7d3ccf9..b852f9a94 100644
--- a/roles/nepomuk.rb
+++ b/roles/nepomuk.rb
@@ -22,6 +22,15 @@ default_attributes(
       }
     }
   },
+  :sysctl => {
+    :kvm => {
+      :comment => "Tuning for KVM guest",
+      :parameters => { 
+        "kernel.sched_min_granularity_ns" => 10000000,
+        "kernel.sched_wakeup_granularity_ns" => 15000000
+      }
+    }
+  },
   :squid => {
     :cache_mem => "7500 MB",
     :cache_dir => "coss /store/squid/coss-01 128000 block-size=8192 max-size=262144 membufs=80"
-- 
2.43.2