From fbf228931c669b4f96d40b67d7e571cbb8200f92 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Fri, 14 Jun 2024 10:52:56 -0700 Subject: [PATCH] Make foreground and background I/O priority different 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 --- storage/init.storage.rc | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/storage/init.storage.rc b/storage/init.storage.rc index 56e8e4f..5a073d2 100644 --- a/storage/init.storage.rc +++ b/storage/init.storage.rc @@ -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