1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
-- Authors: Tibor Csögör <tibi@tiborius.net>
-- License: Public domain
-- Last Changed: 2007-03-10
--
-- $Id: statusd_cpustat.lua 80 2007-03-10 00:16:09Z tibi $
-- statusd_cpustat.lua -- CPU monitor for Ion3's statusbar
-- version : 0.3
-- date : 2007-03-10
-- author : Tibor Csögör <tibi@tiborius.net>
-- Shows the CPU utilization of the system similiar to top(1).
-- This script depends on the /proc filesystem and thus only works on Linux.
-- Tested with kernel 2.6.16.
-- Configuration:
-- The following placeholders (with a "cpustat_" prefix) can be used in the
-- statusbar template: `user', `nice', `idle', `system', `iowait', `irq',
-- `softirq' and `steal'. In addition, `system_adj' sums up the last 5 fields.
-- For a compact output simply use the `cpustat' placeholder.
-- This software is in the public domain.
--------------------------------------------------------------------------------
local defaults = {
update_interval = 1000, -- 1 second
}
local settings = table.join(statusd.get_config("cpustat"), defaults)
local last_stat, current_stat
local last_uptime, current_uptime = 0, 0
local first_run = true
function math.round(number, precision)
local m = 10^(precision or 0)
return math.floor((number*m)+(1/2)) / m
end
-- this function reads stats from /proc/stat and /proc/uptime and calculates the
-- CPU time used in the measurement interval
local function get_cpustat()
local f1, f2, s, s2
f1 = io.open('/proc/stat', 'r')
f2 = io.open('/proc/uptime', 'r')
if ((f1 == nil ) or (f2 == nil)) then return nil end
s = f1:read("*l")
s2 = f2:read("*l")
f1:close()
f2:close()
last_uptime = current_uptime
local tmp, tmp, up1, up2
tmp, tmp, up1, up2 = string.find(s2, "(%d+)\.(%d+)%s%d")
current_uptime = tonumber(up1 .. up2)
local uptime_interv = current_uptime - last_uptime
local t = {}
for tmp in string.gmatch(s, "%s+(%d+)") do
table.insert(t, tonumber(tmp))
end
last_stat = current_stat
current_stat = t
if (first_run) then
last_stat = t
first_run = false
end
local c = {}
for i = 1, #(t) do
table.insert(c, math.round(((current_stat[i] - last_stat[i])
/ uptime_interv) * 100))
end
-- adjusted system CPU time (= system + iowait + irq + softirq + steal)
table.insert(c, math.round((((current_stat[3] - last_stat[3]) +
(current_stat[5] - last_stat[5]) +
(current_stat[6] - last_stat[6]) +
(current_stat[7] - last_stat[7]) +
(current_stat[8] - last_stat[8]))
/ uptime_interv) * 100))
return c
end
local cpustat_timer = statusd.create_timer()
local function update_cpustat()
local t = get_cpustat()
if (t == nil) then return nil end
statusd.inform("cpustat_user", t[1] .. "%")
statusd.inform("cpustat_nice", t[2] .. "%")
statusd.inform("cpustat_system", t[3] .. "%")
statusd.inform("cpustat_system_adj", t[9] .. "%")
statusd.inform("cpustat_idle", t[4] .. "%")
statusd.inform("cpustat_iowait", t[5] .. "%")
statusd.inform("cpustat_irq", t[6] .. "%")
statusd.inform("cpustat_softirq", t[7] .. "%")
statusd.inform("cpustat_steal", t[8] .. "%")
statusd.inform("cpustat", string.format("%3d%% us,%3d%% sy,%3d%% ni",
t[1], t[9], t[2]))
cpustat_timer:set(settings.update_interval, update_cpustat)
end
update_cpustat()
-- EOF
|
