From 99defb946229477e4929682ba5f8701c77a2aa77 Mon Sep 17 00:00:00 2001
From: Jon Bratseth <bratseth@verizonmedia.com>
Date: Tue, 5 Nov 2019 23:47:18 +0100
Subject: Make it possible specify a cpu speedup factor for a flavor

This allows us to model the speed difference between different
cpu generations.
---
 .../java/com/yahoo/config/provision/Flavor.java    | 24 ++++++++++++----------
 .../main/resources/configdefinitions/flavors.def   |  4 ++++
 2 files changed, 17 insertions(+), 11 deletions(-)

(limited to 'config-provisioning/src')

diff --git a/config-provisioning/src/main/java/com/yahoo/config/provision/Flavor.java b/config-provisioning/src/main/java/com/yahoo/config/provision/Flavor.java
index bc1f7fbf83b..9e6e2c3bb67 100644
--- a/config-provisioning/src/main/java/com/yahoo/config/provision/Flavor.java
+++ b/config-provisioning/src/main/java/com/yahoo/config/provision/Flavor.java
@@ -26,19 +26,21 @@ public class Flavor {
 
     private final Optional<FlavorOverrides> flavorOverrides;
 
+    private static final double coreSpeedupRolloutFactor = 1.0/3.0; // TODO: Increase to 2/3 (then 1) on later releases
+
     /** Creates a *host* flavor from configuration */
     public Flavor(FlavorsConfig.Flavor flavorConfig) {
-        this(
-                flavorConfig.name(),
-                new NodeResources(flavorConfig.minCpuCores(),
-                        flavorConfig.minMainMemoryAvailableGb(),
-                        flavorConfig.minDiskAvailableGb(),
-                        flavorConfig.bandwidth() / 1000,
-                        flavorConfig.fastDisk() ? NodeResources.DiskSpeed.fast : NodeResources.DiskSpeed.slow),
-                Optional.empty(),
-                Type.valueOf(flavorConfig.environment()),
-                true,
-                flavorConfig.cost());
+        this(flavorConfig.name(),
+             new NodeResources(flavorConfig.minCpuCores() *
+                                      (1 + (flavorConfig.cpuCoreSpeedup() - 1) * coreSpeedupRolloutFactor),
+                               flavorConfig.minMainMemoryAvailableGb(),
+                               flavorConfig.minDiskAvailableGb(),
+                               flavorConfig.bandwidth() / 1000,
+                               flavorConfig.fastDisk() ? NodeResources.DiskSpeed.fast : NodeResources.DiskSpeed.slow),
+             Optional.empty(),
+             Type.valueOf(flavorConfig.environment()),
+             true,
+             flavorConfig.cost());
     }
 
     /** Creates a *node* flavor from a node resources spec */
diff --git a/config-provisioning/src/main/resources/configdefinitions/flavors.def b/config-provisioning/src/main/resources/configdefinitions/flavors.def
index 59b6c852b0e..a33f141c91b 100644
--- a/config-provisioning/src/main/resources/configdefinitions/flavors.def
+++ b/config-provisioning/src/main/resources/configdefinitions/flavors.def
@@ -17,6 +17,10 @@ flavor[].environment string default="undefined"
 # The minimum number of CPU cores available.
 flavor[].minCpuCores double default=0.0
 
+# The speedup factor per cpu core compared to an historical baseline for a particular cpu generation
+# The vcpu resources available on the node will be minCpuCores * cpuCoreSpeedup
+flavor[].cpuCoreSpeedup double default=1.0
+
 # The minimum amount of main memory available.
 flavor[].minMainMemoryAvailableGb double default=0.0
 
-- 
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