85 lines
2.1 KiB
Lua
85 lines
2.1 KiB
Lua
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-- Licensed under the GNU General Public License v2
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-- * (c) 2009, Adrian C. <anrxc@sysphere.org>
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-- * (c) 2008, Lucas de Vries <lucas@glacicle.com>
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---------------------------------------------------
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-- {{{ Grab environment
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local ipairs = ipairs
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local io = { open = io.open }
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local setmetatable = setmetatable
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local math = { floor = math.floor }
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local table = { insert = table.insert }
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local string = {
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find = string.find,
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gmatch = string.gmatch
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}
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-- }}}
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-- Cpu: provides CPU usage for all available CPUs/cores
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module("vicious.cpu")
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-- Initialise function tables
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local cpu_usage = {}
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local cpu_total = {}
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local cpu_active = {}
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-- {{{ CPU widget type
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local function worker(format)
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-- Get /proc/stat
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local f = io.open("/proc/stat")
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local cpu_lines = {}
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for line in f:lines() do
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if string.find(line, "^cpu") then
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cpu_lines[#cpu_lines+1] = {}
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for i in string.gmatch(line, "[%s]+([%d]+)") do
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table.insert(cpu_lines[#cpu_lines], i)
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end
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end
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end
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f:close()
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-- Ensure tables are initialized correctly
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while #cpu_total < #cpu_lines do
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table.insert(cpu_total, 0)
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end
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while #cpu_active < #cpu_lines do
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table.insert(cpu_active, 0)
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end
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while #cpu_usage < #cpu_lines do
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table.insert(cpu_usage, 0)
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end
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local total_new = {}
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local active_new = {}
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local diff_total = {}
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local diff_active = {}
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for i, v in ipairs(cpu_lines) do
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-- Calculate totals
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total_new[i] = 0
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for j = 1, #v do
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total_new[i] = total_new[i] + v[j]
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end
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active_new[i] = v[1] + v[2] + v[3]
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-- Calculate percentage
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diff_total[i] = total_new[i] - cpu_total[i]
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diff_active[i] = active_new[i] - cpu_active[i]
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cpu_usage[i] = math.floor(diff_active[i] / diff_total[i] * 100)
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-- Store totals
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cpu_total[i] = total_new[i]
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cpu_active[i] = active_new[i]
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end
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return cpu_usage
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end
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-- }}}
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setmetatable(_M, { __call = function(_, ...) return worker(...) end })
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