From 961ea09fbfee7c80b57998056efa70d69053528f Mon Sep 17 00:00:00 2001
From: Daniel Mitterdorfer <daniel.mitterdorfer@gmail.com>
Date: Mon, 14 May 2018 09:59:58 +0200
Subject: [PATCH] Compact memory after dropping caches

With this commit we request memory compaction after dropping caches in
order to avoid increasing memory fragmentation when running multiple
benchmarks.

Relates #64
---
 fixtures/ansible/roles/drop-caches/tasks/main.yml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fixtures/ansible/roles/drop-caches/tasks/main.yml b/fixtures/ansible/roles/drop-caches/tasks/main.yml
index 33bd78dfae3c9..067ffcd60c8c0 100644
--- a/fixtures/ansible/roles/drop-caches/tasks/main.yml
+++ b/fixtures/ansible/roles/drop-caches/tasks/main.yml
@@ -10,3 +10,8 @@
 - name: Free slab objects and pagecache
   command: echo 3 > /proc/sys/vm/drop_caches
   become: true
+
+# also request compaction to reduce memory fragmentation
+- name: Request memory compaction
+  command: echo 1 > /proc/sys/vm/compact_memory
+  become: true