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Text File  |  2012-05-20  |  982 b   |  29 lines
  1. #! /bin/sh
  2. # 
  3. # Laptop mode tools module: Scheduler tunables for multi-socket SMT systems.
  4. #
  5.  
  6. if [ x$CONTROL_SCHED_SMT_POWER_SAVINGS = x1 ] || [ x$ENABLE_AUTO_MODULES = x1 -a x$CONTROL_SCHED_SMT_POWER_SAVINGS = xauto ]; then
  7.     if [ $ON_AC -eq 1 ]; then
  8.         log "VERBOSE" "On AC power: setting scheduler power saving to 0."
  9.         if [ -w /sys/devices/system/cpu/sched_smt_power_savings ]; then
  10.             echo 0 > /sys/devices/system/cpu/sched_smt_power_savings
  11.             log "VERBOSE" "Scheduler SMT power save mode disabled."
  12.         else
  13.             log "VERBOSE" "Scheduler SMT power saving is not available."
  14.         fi
  15.     else
  16.         log "VERBOSE" "On battery: setting scheduler power saving to 1."
  17.         if [ -w /sys/devices/system/cpu/sched_smt_power_savings ]; then
  18.             echo 2 > /sys/devices/system/cpu/sched_smt_power_savings
  19.             log "VERBOSE" "Scheduler SMT power save mode enabled."
  20.         else
  21.             log "VERBOSE" "Scheduler SMT power saving is not available."
  22.         fi
  23.  
  24.     fi
  25. else
  26.     log "VERBOSE" "Scheduler power setting is disabled."
  27. fi
  28.  
  29.