76 lines
2.2 KiB
Lua
76 lines
2.2 KiB
Lua
|
--[[
|
||
|
|
|
||
|
|
Licensed under GNU General Public License v2
|
||
|
|
* (c) 2013, Luca CPZ
|
||
|
|
* (c) 2010-2012, Peter Hofmann
|
||
|
|
|
||
|
|
--]]
|
||
|
|
|
||
|
|
local helpers = require("lain.helpers")
|
||
|
|
local wibox = require("wibox")
|
||
|
|
local math = math
|
||
|
|
local string = string
|
||
|
|
local tostring = tostring
|
||
|
|
|
||
|
|
-- CPU usage
|
||
|
|
-- lain.widget.cpu
|
||
|
|
|
||
|
|
local function factory(args)
|
||
|
|
local cpu = { core = {}, widget = wibox.widget.textbox() }
|
||
|
|
local args = args or {}
|
||
|
|
local timeout = args.timeout or 2
|
||
|
|
local settings = args.settings or function() end
|
||
|
|
|
||
|
|
function cpu.update()
|
||
|
|
-- Read the amount of time the CPUs have spent performing
|
||
|
|
-- different kinds of work. Read the first line of /proc/stat
|
||
|
|
-- which is the sum of all CPUs.
|
||
|
|
for index,time in pairs(helpers.lines_match("cpu","/proc/stat")) do
|
||
|
|
local coreid = index - 1
|
||
|
|
local core = cpu.core[coreid] or
|
||
|
|
{ last_active = 0 , last_total = 0, usage = 0 }
|
||
|
|
local at = 1
|
||
|
|
local idle = 0
|
||
|
|
local total = 0
|
||
|
|
|
||
|
|
for field in string.gmatch(time, "[%s]+([^%s]+)") do
|
||
|
|
-- 4 = idle, 5 = ioWait. Essentially, the CPUs have done
|
||
|
|
-- nothing during these times.
|
||
|
|
if at == 4 or at == 5 then
|
||
|
|
idle = idle + field
|
||
|
|
end
|
||
|
|
total = total + field
|
||
|
|
at = at + 1
|
||
|
|
end
|
||
|
|
|
||
|
|
local active = total - idle
|
||
|
|
|
||
|
|
if core.last_active ~= active or core.last_total ~= total then
|
||
|
|
-- Read current data and calculate relative values.
|
||
|
|
local dactive = active - core.last_active
|
||
|
|
local dtotal = total - core.last_total
|
||
|
|
local usage = math.ceil((dactive / dtotal) * 100)
|
||
|
|
|
||
|
|
core.last_active = active
|
||
|
|
core.last_total = total
|
||
|
|
core.usage = usage
|
||
|
|
|
||
|
|
-- Save current data for the next run.
|
||
|
|
cpu.core[coreid] = core
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
cpu_now = cpu.core
|
||
|
|
cpu_now.usage = cpu_now[0].usage
|
||
|
|
widget = cpu.widget
|
||
|
|
|
||
|
|
settings()
|
||
|
|
end
|
||
|
|
|
||
|
|
helpers.newtimer("cpu", timeout, cpu.update)
|
||
|
|
|
||
|
|
return cpu
|
||
|
|
end
|
||
|
|
|
||
|
|
return factory
|