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init.rc: set f2fs seq_file_ra_mul to 128

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Based on experiments, we fount out 128 (128 x global readahead window
size = 16mb) is the optimal multiple to boost up read speeds for the
sequentially accessed files with POSIX_FADV_SEQUENTIAL.

Bug: 195311558
Test: check the /sys/fs/f2fs/<userdata partition>/seq_file_ra_mul value
Change-Id: I7563ad6e47b9ab76ae7fe36978d0e5970a7490e8
Signed-off-by: Daeho Jeong <daehojeong@google.com>
This commit is contained in:
Daeho Jeong 2023-06-28 14:35:30 -07:00
parent de4ad68fa7
commit d6d8c1f81c
1 changed files with 1 additions and 1 deletions
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2
rootdir/init.rc
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@ -1129,7 +1129,7 @@ on boot
write /dev/sys/fs/by-name/userdata/iostat_enable 1
# set readahead multiplier for POSIX_FADV_SEQUENTIAL files
write /dev/sys/fs/by-name/userdata/seq_file_ra_mul 16
write /dev/sys/fs/by-name/userdata/seq_file_ra_mul 128
# limit discard size to 128MB in order to avoid long IO latency
# for filesystem tuning first (dm or sda)