Reactivate all the cores in cpu.sh.

tools/cpu.sh

 #!/bin/bash
 # Copyright 2014 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 CPUPATH=/sys/devices/system/cpu
 
 MAXID=$(cat $CPUPATH/present | awk -F- '{print $NF}')
 
 set_governor() {
@@ skipping 13 matching lines @@
 single_core() {
   echo "Switching to single-core mode"
   for (( i=1; i<=$MAXID; i++ )); do
     echo 0 > $CPUPATH/cpu$i/online
   done
 }
 
 
 all_cores() {
   echo "Reactivating all CPU cores"
-  for (( i=2; i<=$MAXID; i++ )); do
+  for (( i=1; i<=$MAXID; i++ )); do
     echo 1 > $CPUPATH/cpu$i/online
   done
 }
 
 case "$1" in
   fast | performance)
     set_governor "performance"
     ;;
   slow | powersave)
     set_governor "powersave"
     ;;
   default | ondemand)
     set_governor "ondemand"
     ;;
   dualcore | dual)
     dual_core
     ;;
   singlecore | single)
     single_core
     ;;
   allcores | all)
     all_cores
     ;;
   *)
     echo "Usage: $0 fast|slow|default|singlecore|dualcore|all"
     exit 1
     ;;
 esac