archlinux_conf/etc/ion3/statusd_cpufreq.lua

   1 -- statusd_cpufreq.lua
   2 --
   3 -- Public domain
   4 --
   5 -- Use the key "cpufreq_[KMG]" to get the current CPU frequency in
   6 -- K/M/GHz, according to /sys/devices/system/cpu/cpuX/cpufreq/.  (This
   7 -- has the advantage of being a much "rounder" number than the one in
   8 -- /proc/cpuinfo, as provided by statusd_cpuspeed.lua.)
   9 --
  10 -- The "cpu" option to the statusd settings for cpufreq modifies which
  11 -- cpu we look at.
  12
  13 local defaults={ update_interval=2*1000, cpu=0 }
  14 local settings=table.join(statusd.get_config("cpufreq"), defaults)
  15
  16 function get_cpufreq()
  17         local f=io.open('/sys/devices/system/cpu/cpu'.. settings.cpu ..'/cpufreq/scaling_cur_freq')
  18         local cpufreq_K = f:read('*a')
  19         f:close()
  20
  21         local cpufreq_M = cpufreq_K / 1000
  22         local cpufreq_G = cpufreq_M / 1000
  23
  24         return tostring(cpufreq_K), tostring(cpufreq_M), tostring(cpufreq_G)
  25 end
  26
  27 function update_cpufreq()
  28         local cpufreq_K, cpufreq_M, cpufreq_G = get_cpufreq()
  29         statusd.inform("cpufreq_K", cpufreq_K)
  30         statusd.inform("cpufreq_M", cpufreq_M)
  31         statusd.inform("cpufreq_G", cpufreq_G)
  32         cpufreq_timer:set(settings.update_interval, update_cpufreq)
  33 end
  34
  35 cpufreq_timer = statusd.create_timer()
  36 update_cpufreq()