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init.rc: Tune F2FS and dirty writeout policy for modern devices

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In a previous commit bb0838b511, the gc_urgent_sleep_time for F2FS was aggressively set to 50ms to optimize GC.
This change, however, led to performance regressions on most devices, particularly of those running in 4.19+ kernels.
From our tests, the heightened CPU and I/O activity from this aggressive garbage collection setting is the likely cause.
To address this, we're revising the gc_urgent_sleep_time parameter to strike a balance between aggressive GC and device performance, taking
bb0838b511 goal into consideration.
Furthermore, the dirty writeout policy has been aligned with the latest configurations used in Pixel devices,
and cp_interval has been adjusted to surpass dirty_expire_centisecs for improved power efficiency during idle times.

Test: booted partner device, monitor performance
Change-Id: Ie4d0c870d734e915aaebcc53e64acdabac47b6dc
Signed-off-by: minaripenguin <minaripenguin@users.noreply.github.com>
This commit is contained in:
hydrangea07 2023-08-27 08:55:11 +08:00 • committed by DigiGoon
parent 0d071119a0
commit 367e295c4b
1 changed files with 4 additions and 2 deletions
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6
rootdir/init.rc
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@ -1190,10 +1190,12 @@ on boot
# to avoid power consumption when system becomes mostly idle. Be careful
# to make it too large, since it may bring userdata loss, if they
# are not aware of using fsync()/sync() to prepare sudden power-cut.
write /dev/sys/fs/by-name/userdata/cp_interval 200
write /dev/sys/fs/by-name/userdata/gc_urgent_sleep_time 50
write /dev/sys/fs/by-name/userdata/cp_interval 6000
write /dev/sys/fs/by-name/userdata/gc_urgent_sleep_time 200
write /dev/sys/fs/by-name/userdata/iostat_period_ms 1000
write /dev/sys/fs/by-name/userdata/iostat_enable 0
write /proc/sys/vm/dirty_expire_centisecs 3000
write /proc/sys/vm/dirty_background_ratio 10
# set readahead multiplier for POSIX_FADV_SEQUENTIAL files
write /dev/sys/fs/by-name/userdata/seq_file_ra_mul 128