commit a31147ebdec286c5d6a2a1fd1009c0799b4c8398
author Wei Wang <wvw@google.com> Wed Nov 02 22:50:28 2016 -0700
committer Wei Wang <wvw@google.com> Wed Nov 09 16:33:54 2016 -0800
tree 832c439106b1777c4db47695ecf3fa4c7e71285e
parent 2d2b22c4d6abe27edc5adc946ed92c966de504bd

marlin: fs tune for boot time optimization

Bug: 32627741
Test: manual
Change-Id: I4a1acd9a194ccc75b1cfeac8ed1a731c74c6d60e
(cherry picked from commit 11f3108c97d824cdf304ea77dba30890f354630f)

init.common.rc

diff --git a/init.common.rc b/init.common.rc
index 97fd351..3827ca1 100755
--- a/init.common.rc
+++ b/init.common.rc
@@ -61,6 +61,15 @@
     # mount RW partitions which need run fsck
     mount_all fstab.${ro.hardware} --late
 
+    # boot time fs tune
+    write /sys/block/sda/queue/iostats 0
+    write /sys/block/sda/queue/scheduler cfq
+    write /sys/block/sda/queue/iosched/slice_idle 0
+    write /sys/block/sda/queue/read_ahead_kb 2048
+    write /sys/block/sda/queue/nr_requests 256
+    write /sys/block/dm-0/queue/read_ahead_kb 2048
+    write /sys/block/dm-1/queue/read_ahead_kb 2048
+
 on post-fs-data
     # restart qseecomd once we have /data/
     restart qseecomd
@@ -706,7 +715,12 @@
     write /dev/cpuset/foreground/cpus 0-2
     write /dev/cpuset/background/cpus 0
     write /dev/cpuset/system-background/cpus 0-2
-
+    # end boot time fs tune
+    write /sys/block/sda/queue/read_ahead_kb 128
+    write /sys/block/sda/queue/nr_requests 128
+    write /sys/block/dm-0/queue/read_ahead_kb 128
+    write /sys/block/dm-1/queue/read_ahead_kb 128
+    write /sys/block/sda/queue/iostats 1
 
 # battery driver settings for the retail demo environment where
 # the device will be perpertually plugged in to a power source