It seems we have chance that file_base_lru is zero.
Avoid it by adding 1.
Bug: 167660459
Bug: 163134367
Test: boot
Signed-off-by: Martin Liu <liumartin@google.com>
Merged-In: If19dbbaafe6cd28a9d5b7f8a002f3cd33daab5e7
Change-Id: If19dbbaafe6cd28a9d5b7f8a002f3cd33daab5e7
When a device is thrashing the file cache, workingset refaults can
grow slowly because of variant reasons. Current thrashing detection
mechanism could reset the thrashing counter frequently as it relies
on presence of reclaim activity, however refaults can keep increasing
even when the device is not actively reclaiming. In addition, the
thrashing counter gets reset when conditions require a kill but lmkd
could not find an eligible process to be killed. This is problematic
because when this happens thrashing is being ignored.
Use a fixed 1 sec periods to aggregate the thrashing counter. Also we
need to keep monitoring thrashing counter while retrying as someone
could release the memory to mitigate the thrashing. If thrashing
counter is greater than the limit at the end of the 1 sec period this
means lmkd failed to find an eligible process to kill. In this case
we store accumulated thrashing in case a new eligible process appears
until accumulated thrashing is less that the limit or we miss an
entire 1 sec window.
Bug: 163134367
Test: heavy loading launch
Signed-off-by: Martin Liu <liumartin@google.com>
Merged-In: Ie9f4121ea604179c0ad510cc8430e7a6aec6e6b2
Change-Id: Ie9f4121ea604179c0ad510cc8430e7a6aec6e6b2
This reverts commit 95551f816a.
Reason to revert: don't need this change.
Bug: 163134367
Signed-off-by: Martin Liu <liumartin@google.com>
Change-Id: I8b209b054b6caec553bce13cd51f931401c1e42a
When swap is depleted file cache thrashing might result in allocations
quickly pushing memory below low watermark and kswapd quickly pushing
it back above high watermark. In this situation free memory stays above
high watermark most of the time and lmkd during its periodic wake-ups
has low chance of detecting low memory conditions. Add a 15% margin
for high watermark which would allow lmkd to kill if swap is low,some
memory was reclaimed since the last wakeup and free memory is just
above the high watermark limit.
Bug: 163134367
Test: heavy loading launch
Signed-off-by: Martin Liu <liumartin@google.com>
Change-Id: I5694736b04bafcd13c01f4b51e242e2ac4ff55a8
Oftentimes while investigating bugreports it's unclear whether lmkd
was active between kills. To provide visibility into lmkd activity
adding the following fields into killinfo reports:
MsSinceEvent - number of msecs since the last PSI/vmpressure event
MsSincePrevWakeup - number of msecs since the previous wakeup
WakeupsSinceEvent - number of wakeups since the last PSI/vmpressure
event
SkippedWakeups - number of wakeups that were skipped due to an
incomplete kill
Bug: 162034541
Bug: 161955028
Bug: 162297751
Test: lmkd_unit_test
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I0356c27515132ff0dd309b59a8bf907acbd67cd8
(cherry picked from commit d7b4fcb8a5)
Signed-off-by: Martin Liu <liumartin@google.com>
Merged-In: I0356c27515132ff0dd309b59a8bf907acbd67cd8
When lmkd tries to kill a process in uninterruptible sleep state, it may
need to wait for a long time. To prevent this set the default kill timeout
to 100ms which should work for majority of the devices.
Bug: 160295034
Bug: 161955028
Bug: 162297751
Test: lmkd_unit_test
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: Ia280dc095df9ca8494278e0a75b976ed93fc04ae
(cherry picked from commit 7d1f4f0047)
Signed-off-by: Martin Liu <liumartin@google.com>
Merged-In: Ia280dc095df9ca8494278e0a75b976ed93fc04ae
Fix code logic to obey our intetion of not killing perceptible apps
due to low swap if above min wmark.
Bug: 155709603
Test: boot
Signed-off-by: Martin Liu <liumartin@google.com>
Merged-In: Ifc09c2a1fe7e21faa096988f471644f63951d81c
Change-Id: Ifc09c2a1fe7e21faa096988f471644f63951d81c
Prevent kills of perceptible apps due to swap shortages unless system
free memory is below the min watermark. This prevents kills of important
apps when the system is recovering from the memory pressure.
Bug: 155709603
Test: memory stress test with multiple foreground apps
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Merged-In: I6beb4b55f8b4f7bc22818b5a7bdfa3adc6cd31c1
Change-Id: I6beb4b55f8b4f7bc22818b5a7bdfa3adc6cd31c1
Lower the min swap threshold to 10% for all devices to limit kills while
swap still has enough space.
Bug: 155709603
Test: memory stress test with multiple foreground apps
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I443486763c034ed0603ea52b81c060c3969af9a5
In the cases when foreground processes should not be killed
min_score_adjust should be set above PERCEPTIBLE_APP_ADJ to prevent such
kills.
Bug: 155709603
Test: memory stress test with multiple foreground apps
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: If187654b8001ce843ec6085ccd2042d75a986dae
Allow lmkd to stop waiting for a kill notification if a kill takes longer
than ro.lmk.kill_timeout_ms.
Bug: 147315292
Test: lmkd_unit_test with ro.lmk.kill_timeout_ms set to 100
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Merged-In: Ia3eed3448fd6928a5e634c2737044722048b3578
Change-Id: Ia3eed3448fd6928a5e634c2737044722048b3578
Add --reinit command-line option to allow updating lmkd properties. For
example to enable debug logging in the running lmkd process user should
issue:
setprop ro.lmk.debug true
lmkd --reinit
Bug: 155149944
Test: lmkd_unit_test after resetting lmkd properties
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Merged-In: Ic60331f3368f5a7fdfe09ad7d47c7ccf0a497685
Change-Id: Ic60331f3368f5a7fdfe09ad7d47c7ccf0a497685
As part of moving libstatssocket into statsd apex, libstatssocket will
only be available as a shared library.
Bug: 145923416
Test: m
Change-Id: Ia6b13dcd378011c201b2595d2b3f3fc14213011b
Use the autogenerated libstatslog_lmkd to send events to statsd
The logging schema for statsd is changing as part of statsd becoming
a Mainline module in R. The autogenerated code will handle the schema
change.
Bug: 145887874
Test: m -j
Test: atest android.cts.statsd.atom.UidAtomTests#testLmkKillOccurred
Change-Id: Ibae4cd822807369a799d5c1f6a9c51272e38a074
Martin Liu
Suren Baghdasaryan
Muhammad Qureshi
Automerger Merge Worker
Xin Li