@ -19,38 +19,6 @@ dbg() {
[[ "$DEBUG" -eq 1 ]] && echo -e "[*] $@"
}
# Safely apply sysctl adjustment
ctl() {
# Fetch the current key value
local curval=`sysctl -e -n "$1"`
# Bail out if sysctl key does not exist
if [[ -z "$curval" ]]
then
err "Key $1 does not exist. Skipping."
return 1
fi
# Bail out if sysctl is already set
if [[ "$curval" == "$2" ]]
then
dbg "Key $1 is already set to $2. Skipping."
return 0
fi
# Set the new value
sysctl -w "$1"="$2" &> /dev/null
# Bail out if write fails
if [[ $? -ne 0 ]]
then
err "Failed to write $2 to $1. Skipping."
return 1
fi
dbg "Set $1: $curval --> $2"
}
# Safely write value to file
write() {
# Bail out if file does not exist
@ -127,42 +95,42 @@ dbg `uname -a`
dbg "------------------------------"
# Kernel
ctl kernel. perf_cpu_time_max_percent 5
ctl kernel. sched_autogroup_enabled 1
ctl kernel. sched_enable_thread_grouping 1
ctl kernel. sched_child_runs_first 1
ctl kernel. sched_downmigrate "50 50"
ctl kernel. sched_upmigrate "80 80"
ctl kernel. sched_group_downmigrate 50
ctl kernel. sched_group_upmigrate 80
ctl kernel. sched_tunable_scaling 0
ctl kernel. sched_latency_ns 10000000
ctl kernel. sched_min_granularity_ns 1000000
ctl kernel. sched_migration_cost_ns 1000000
ctl kernel. sched_min_task_util_for_boost 35
ctl kernel. sched_min_task_util_for_colocation 25
ctl kernel. sched_min_task_util_for_boost_colocation 35
ctl kernel. sched_nr_migrate 64
ctl kernel. sched_schedstats 0
ctl kernel. sched_wakeup_granularity_ns 5000000
write /proc/sys/kernel/ perf_cpu_time_max_percent 5
write /proc/sys/kernel/ sched_autogroup_enabled 1
write /proc/sys/kernel/ sched_enable_thread_grouping 1
write /proc/sys/kernel/ sched_child_runs_first 1
write /proc/sys/kernel/ sched_downmigrate "50 50"
write /proc/sys/kernel/ sched_upmigrate "80 80"
write /proc/sys/kernel/ sched_group_downmigrate 50
write /proc/sys/kernel/ sched_group_upmigrate 80
write /proc/sys/kernel/ sched_tunable_scaling 0
write /proc/sys/kernel/ sched_latency_ns 10000000
write /proc/sys/kernel/ sched_min_granularity_ns 1000000
write /proc/sys/kernel/ sched_migration_cost_ns 1000000
write /proc/sys/kernel/ sched_min_task_util_for_boost 35
write /proc/sys/kernel/ sched_min_task_util_for_colocation 25
write /proc/sys/kernel/ sched_min_task_util_for_boost_colocation 35
write /proc/sys/kernel/ sched_nr_migrate 64
write /proc/sys/kernel/ sched_schedstats 0
write /proc/sys/kernel/ sched_wakeup_granularity_ns 5000000
# Net
ctl net. ipv4.tcp_ecn 1
ctl net. ipv4.tcp_fastopen 3
ctl net. ipv4.tcp_syncookies 0
write /proc/sys/net/ ipv4.tcp_ecn 1
write /proc/sys/net/ ipv4.tcp_fastopen 3
write /proc/sys/net/ ipv4.tcp_syncookies 0
# VM
ctl vm. dirty_background_ratio 10
ctl vm. dirty_ratio 30
ctl vm. dirty_expire_centisecs 1000
ctl vm. dirty_writeback_centisecs 0
ctl vm. extfrag_threshold 750
ctl vm. oom_dump_tasks 0
ctl vm. page-cluster 0
ctl vm. reap_mem_on_sigkill 1
ctl vm. stat_interval 10
ctl vm. swappiness 100
ctl vm. vfs_cache_pressure 200
write /proc/sys/vm/ dirty_background_ratio 10
write /proc/sys/vm/ dirty_ratio 30
write /proc/sys/vm/ dirty_expire_centisecs 1000
write /proc/sys/vm/ dirty_writeback_centisecs 0
write /proc/sys/vm/ extfrag_threshold 750
write /proc/sys/vm/ oom_dump_tasks 0
write /proc/sys/vm/ page-cluster 0
write /proc/sys/vm/ reap_mem_on_sigkill 1
write /proc/sys/vm/ stat_interval 10
write /proc/sys/vm/ swappiness 100
write /proc/sys/vm/ vfs_cache_pressure 200
# Scheduler features
if [[ -f "/sys/kernel/debug/sched_features" ]]