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Commit 2a7bd96c authored by Daeho Jeong's avatar Daeho Jeong
Browse files

init.rc: increase readahead window multiplier for POSIX_FADV_SEQUENTIAL files 



Set readahead window multiplier for POSIX_FADV_SEQUENTIAL files as 16 to
enhance file read performance like a language package loading.

Bug: 192011293
Test: adb shell cat /dev/sys/fs/by-name/userdata/seq_file_ra_mul
Signed-off-by: default avatarDaeho Jeong <daehojeong@google.com>
Change-Id: I7f7e4339651be2d6aa99b07bcb12ab62136a940e
Merged-In: I7f7e4339651be2d6aa99b07bcb12ab62136a940e
parent c94d40e4

rootdir/init.rc

+3 −0
Original line number Diff line number Diff line
@@ -1099,6 +1099,9 @@ on boot 
    write /dev/sys/fs/by-name/userdata/gc_urgent_sleep_time 50

    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



    # limit discard size to 128MB in order to avoid long IO latency

    # for filesystem tuning first (dm or sda)

    # this requires enabling selinux entry for sda/mmcblk0 in vendor side