# Tweak background writeout
    write /proc/sys/vm/dirty_expire_centisecs 500
    write /proc/sys/vm/dirty_background_ratio  5
    write /proc/sys/vm/oom_kill_allocating_task 1
    write /proc/sys/vm/dirty_writeback_centisecs 1000
    write /proc/sys/vm/dirty_ratio 90
    write /proc/sys/vm/vfs_cache_pressure 10
    write /proc/sys/kernel/sched_autogroup_enabled 1
    write /proc/sys/kernel/sched_latency_ns 18000000
    write /proc/sys/kernel/sched_wakeup_granularity_ns 3000000
    write /proc/sys/kernel/sched_min_granularity_ns 1500000
    write /proc/sys/kernel/msgmni 2048
    write /proc/sys/kernel/msgmax 64000
    write /proc/sys/kernel/shmmax 318984192
    write /proc/sys/kernel/shmall 86530
    write /proc/sys/kernel/sem 500 512000 64 2048
    write /proc/sys/kernel/sched_compat_yield 1
    write /proc/sys/kernel/sched_shares_ratelimit 256000
    write /proc/sys/kernel/sched_child_runs_first 0
    write /proc/sys/kernel/hung_task_timeout_secs 0
    write /proc/sys/net/core/wmem_default 262144
    write /proc/sys/net/core/rmem_default 262144
    write /proc/sys/net/core/wmem_max 262144
    write /proc/sys/net/core/rmem_max 262144
    write /proc/sys/net/ipv4/tcp_mem 4096 4096 4096
    write /proc/sys/net/ipv4/tcp_rmem 4096 87380 8388608
    write /proc/sys/net/ipv4/tcp_wmem 4096 87380 8388608
    write /proc/sys/net/ipv4/tcp_keepalive_time 1200
    write /proc/sys/net/ipv4/tcp_keepalive_intvl 30
    write /proc/sys/net/ipv4/tcp_keepalive_probes 5
    write /proc/sys/net/ipv4/tcp_timestamps 0
    write /proc/sys/net/ipv4/tcp_tw_reuse 1
    write /proc/sys/net/ipv4/tcp_tw_recycle 1
    write /proc/sys/net/ipv4/tcp_window_scaling 1
    write /proc/sys/net/ipv4/tcp_sack 1
    write /proc/sys/net/ipv4/tcp_no_metrics_save 1
    write /proc/sys/net/ipv4/tcp_congestion_control cubic
    write /proc/sys/net/core/netdev_max_backlog 2500
    write /proc/sys/net/ipv4/route.flush 1

# Define TCP buffer s  mkdir /data/misc/dhcp 0777 dhcp dhcpizes for various networks
#   ReadMin, ReadInitial, ReadMax, WriteMin, WriteInitial, WriteMax,
    setprop net.tcp.buffersize.default 4096,87380,256960,4096,16384,256960
    setprop net.tcp.buffersize.wifi    4096,87380,256960,4096,16384,256960
    setprop net.tcp.buffersize.umts    4096,87380,256960,4096,16384,256960
    setprop net.tcp.buffersize.gprs    4096,87380,256960,4096,16384,256960
    setprop net.tcp.buffersize.edge    4096,87380,256960,4096,16384,256960
    setprop net.tcp.buffersize.wimax   4092,87380,1520768,4092,16384,1520768
    setprop dalvik.vm.startheapsize 8m
    setprop wifi.supplicant_scan_interval 300
    setprop windowsmgr.max_events_per_sec 60