Evolution-X-Tensor/device_google_gs-common
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Make foreground and background I/O priority different

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Assign a higher I/O priority to foreground I/O compared to background
I/O to improve responsiveness of the foreground app.

The command below shows that this CL has the intended effect on a device
with kernel 5.10:

    $ adb shell 'cd /dev/blkio && grep -aH . blkio.prio.class background/blkio.prio.class'
    blkio.prio.class:none-to-rt
    background/blkio.prio.class:restrict-to-be

From a device with an Android 6.1 kernel:

    $ grep -aH . blkio.prio.class background/blkio.prio.class'
    blkio.prio.class:promote-to-rt
    background/blkio.prio.class:restrict-to-be

Bug: 347109476
Change-Id: I6f1ea6a89a8dfaa223e8d2a82917b4de2d7bf1cf
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Bart Van Assche 2024-06-14 10:52:56 -07:00
parent f02f35fa9c
commit fbf228931c
1 changed files with 8 additions and 0 deletions
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8
storage/init.storage.rc
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@ -1,3 +1,11 @@
on init
# Make foreground and background I/O priority different. none-to-rt was
# introduced in kernel 5.14. promote-to-rt was introduced in kernel 6.5.
# Write none-to-rt first and promote-to-rt next to support both older and
# newer kernel versions.
write /dev/blkio/blkio.prio.class none-to-rt
write /dev/blkio/blkio.prio.class promote-to-rt
on property:ro.build.type=userdebug
write /dev/sys/block/bootdevice/pixel/enable_pixel_ufs_logging 1
chown system /dev/sg3