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Switch to deadline IO scheduler post boot.

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The deadline IO scheduler results in lower latency SD, and pulls in
latency outliers (especially when the flash starts getting fragmented).
Switch to deadline post boot.

Test: various workloads, both synthetic (fio) as well as actual
workloads (app launch, ioshark).

Bug: 63630139
Change-Id: I94b90ac09e921fdf01564bd4c6e1a1b809f3f8ec
Signed-off-by: Mohan Srinivasan <srmohan@google.com>
This commit is contained in:
Mohan Srinivasan
2017-10-18 15:07:40 -07:00
parent 88e5ec1a7f
commit ae780bce59
1 changed files with 2 additions and 0 deletions
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2
init-common.rc
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@@ -15,6 +15,8 @@ on property:sys.boot_completed=1
write /sys/block/sda/queue/iostats 1
write /sys/block/dm-0/queue/read_ahead_kb 512
write /sys/block/dm-1/queue/read_ahead_kb 512
write /sys/block/sda/queue/scheduler deadline
write /sys/block/sde/queue/scheduler deadline
on property:sys.boot_completed=1 && property:ro.build.type=user
write /proc/sys/kernel/modules_disabled 1