arc/container/scripts/arc-sysctl.conf

# Copyright 2017 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description   "Tune sysctls for ARC++"
author        "chromium-os-dev@chromium.org"

# vm.min_filelist_kbytes controls how much of the file cache in RAM is
# protected (i.e. not allowed to be evicted).  If too few code pages are kept,
# the system can thrash.  Android apps add pressure to the cache, so we protect
# more pages when ARC++ is running.
#
# See crbug.com/709660 for discussion.
# Also see crbug.com/792152.

start on started arc-boot-continue
stop on stopped arc-boot-continue

# The start and stop scripts are the same (except the echo statement).
# The value returned by swap.sh changes depending on the container status.

pre-start script
  {
    echo "Pre-start arc-sysctl"
    KB="$(/usr/share/cros/init/swap.sh get_target_value min_filelist)"
    exec sysctl vm.min_filelist_kbytes="${KB}"
  } 2>&1 | logger -t "${UPSTART_JOB}"
end script

post-stop script
  {
    echo "Post-stop arc-sysctl"
    KB="$(/usr/share/cros/init/swap.sh get_target_value min_filelist)"
    exec sysctl vm.min_filelist_kbytes="${KB}"
  } 2>&1 | logger -t "${UPSTART_JOB}"
end script