init.rc: Restored TCP performance tuning

This patch tunes the TCP buffer sizes for high
performance data links including global max rmem
and wmem.

Change-Id: Ida0f9fd6ec23143b158284a019fd26672103c6ce
CRs-Fixed: 439205 435908

rootdir/init.rc

@@ -387,17 +387,22 @@ on boot
 #   ReadMin, ReadInitial, ReadMax, WriteMin, WriteInitial, WriteMax,
     setprop net.tcp.buffersize.default 4096,87380,704512,4096,16384,110208
     setprop net.tcp.buffersize.wifi    524288,1048576,2097152,262144,524288,1048576
-    setprop net.tcp.buffersize.lte     4096,87380,1220608,4096,16384,563200
-    setprop net.tcp.buffersize.umts    4096,87380,563200,4096,16384,110208
-    setprop net.tcp.buffersize.hspa    4096,87380,704512,4096,16384,110208
-    setprop net.tcp.buffersize.hsupa   4096,87380,704512,4096,16384,262144
-    setprop net.tcp.buffersize.hsdpa   4096,87380,704512,4096,16384,262144
-    setprop net.tcp.buffersize.hspap   4096,87380,1220608,4096,16384,393216
-    setprop net.tcp.buffersize.edge    4096,26280,35040,4096,16384,35040
-    setprop net.tcp.buffersize.gprs    4096,8760,11680,4096,8760,11680
-    setprop net.tcp.buffersize.evdo    4096,87380,563200,4096,16384,262144
+    setprop net.tcp.buffersize.lte     524288,1048576,2097152,262144,524288,1048576
+    setprop net.tcp.buffersize.umts    4094,87380,110208,4096,16384,110208
+    setprop net.tcp.buffersize.hspa    4094,87380,1220608,4096,16384,1220608
+    setprop net.tcp.buffersize.hsupa   4094,87380,1220608,4096,16384,1220608
+    setprop net.tcp.buffersize.hsdpa   4094,87380,1220608,4096,16384,1220608
+    setprop net.tcp.buffersize.hspap   4094,87380,1220608,4096,16384,1220608
+    setprop net.tcp.buffersize.edge    4093,26280,35040,4096,16384,35040
+    setprop net.tcp.buffersize.gprs    4092,8760,11680,4096,8760,11680
+    setprop net.tcp.buffersize.evdo    4094,87380,262144,4096,16384,262144
     setprop net.tcp.buffersize.evdo_b  4096,87380,704512,4096,16384,262144
 
+# Assign TCP buffer thresholds to be ceiling value of technology maximums
+# Increased technology maximums should be reflected here.
+    write /proc/sys/net/core/rmem_max  2097152
+    write /proc/sys/net/core/wmem_max  2097152
+
 # Set this property so surfaceflinger is not started by system_init
     setprop system_init.startsurfaceflinger 0