commit c679ef22367853a7b1df70a0a26f07c702dc7f60
author Bart Van Assche <bvanassche@google.com> Tue Jan 23 09:54:19 2024 -0800
committer Bart Van Assche <bvanassche@google.com> Wed Jan 24 11:34:48 2024 -0800
tree 7ad7ce4a5d63007f01653abf909ba74142875b82
parent 09b4d2c8ebb9e5ab10c80b0c4816226d88ff0447

init.hardware.rc: Restore I/O performance

As one can see in cfq_arm_slice_timer(), the CFQ I/O scheduler supports
two parameters that can make it delay I/O: group_idle and slice_idle.
Restore I/O performance by setting both the group_idle and slice_idle
parameters to zero.

Bug: 213617178
Bug: 313578691
Change-Id: I02429876790a6456ca957ff7c38f0c8bf88127f9
Signed-off-by: Bart Van Assche <bvanassche@google.com>

init.hardware.rc

diff --git a/init.hardware.rc b/init.hardware.rc
index 669c8dd..888e31c 100644
--- a/init.hardware.rc
+++ b/init.hardware.rc
@@ -81,6 +81,7 @@
     # Boot time fs tuning
     write /sys/block/sda/queue/iostats 0
     write /sys/block/sda/queue/scheduler cfq
+    write /sys/block/sda/queue/iosched/group_idle 0
     write /sys/block/sda/queue/iosched/slice_idle 0
     write /sys/block/sda/queue/nr_requests 256