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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Top
-- Copyright : (c) Jose A Ortega Ruiz
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose A Ortega Ruiz <jao@gnu.org>
-- Stability : unstable
-- Portability : unportable
--
-- Process activity and memory consumption monitors
--
-----------------------------------------------------------------------------
{-# LANGUAGE ForeignFunctionInterface #-}
module Plugins.Monitors.Top ( topCpuConfig
, runTopCpu
, topMemConfig
, runTopMem ) where
import Plugins.Monitors.Common
-- import Control.Monad (zipWithM)
import Control.Exception
import System.Directory
import System.FilePath
import Foreign.C.Types
import Data.List (sortBy, foldl')
import Data.Ord (comparing)
import Data.IntMap (IntMap)
import qualified Data.IntMap as M
foreign import ccall "unistd.h getpagesize"
c_getpagesize :: CInt
pageSize :: Int
pageSize = fromIntegral c_getpagesize `div` 1024
processes :: IO [FilePath]
processes =
fmap (filter isPid) $ getDirectoryContents "/proc"
where
isPid (x:_) = x `elem` ['0'..'9']
isPid _ = False
showInfo :: String -> String -> Float -> Monitor [String]
showInfo nm sms mms = do
mnw <- getConfigValue maxWidth
mxw <- getConfigValue minWidth
let lsms = length sms
nmw = mnw - lsms - 1
nmx = mxw - lsms - 1
rnm = if nmw > 0 then padString nmw nmx " " True nm else nm
mstr <- showWithColors' sms mms
both <- showWithColors' (rnm ++ " " ++ sms) mms
return [nm, mstr, both]
topMemConfig :: IO MConfig
topMemConfig = mkMConfig
"<both1>"
[ k ++ n | n <- map show [1::Int .. 5]
, k <- ["name", "rss", "both"]]
data Meminfo = MI !String !Int
meminfo :: FilePath -> IO Meminfo
meminfo pidf =
handle noInfo
(do s <- readFile $ "/proc" </> pidf </> "stat"
let fs = words s
m = pageSize * read (fs !! 23)
n = drop 1 $ init (fs !! 1)
evaluate $ MI n m)
where noInfo :: SomeException -> IO Meminfo
noInfo _ = evaluate $ MI "" 0
meminfos :: IO [Meminfo]
meminfos = do
fs <- processes
mapM meminfo fs
sortByMem :: [Meminfo] -> [Meminfo]
sortByMem ps = sortBy (flip (comparing rss)) ps
where rss (MI _ m) = m
topMemProcesses :: Int -> IO [Meminfo]
topMemProcesses n = fmap (take n . sortByMem) meminfos
showMeminfo :: Meminfo -> Monitor [String]
showMeminfo (MI nm rss) =
showInfo nm sms (ms / 1024)
where ms = fromIntegral rss
sms = showWithUnits 2 1 ms
runTopMem :: [String] -> Monitor String
runTopMem _ = do
ps <- io $ topMemProcesses 5
pstr <- mapM showMeminfo ps
parseTemplate $ concat pstr
topCpuConfig :: IO MConfig
topCpuConfig = mkMConfig
"<both1>"
[ k ++ n | n <- map show [1::Int .. 5]
, k <- ["name", "cpu", "both"]]
data Timeinfo = TI !String !Float
type Times = IntMap Timeinfo
data TimesVal = TiV !Int !String !Float
cpuTime :: IO Integer
cpuTime = do
s <- readFile "/proc/stat"
let ts = map read . tail . words . (!!0) . lines
return $ sum (ts s)
nullTimesVal :: TimesVal
nullTimesVal = TiV 0 "" 0
timeinfo :: FilePath -> IO TimesVal
timeinfo pidf =
handle ((\_ -> evaluate nullTimesVal) :: SomeException -> IO TimesVal)
(do s <- readFile $ "/proc" </> pidf </> "stat"
let fs = words s
pid = read (head fs)
rf = read . (fs!!)
n = drop 1 $ init (fs!!1)
evaluate $ TiV pid n (rf 14 + rf 15))
timeinfos :: IO [Times]
timeinfos = do
fs <- processes
tis <- mapM timeinfo fs
return [foldl' acc M.empty tis]
where acc m (TiV p n t) = if p > 10 then M.insert p (TI n t) m else m
combineTimeInfos :: Times -> Times -> Times
combineTimeInfos t0 t1 = M.intersectionWith timeDiff t1 t0
where timeDiff (TI n x1) (TI _ x0) = TI n (x1 - x0)
topTimeProcesses :: Int -> IO [Timeinfo]
topTimeProcesses n = do
c0 <- cpuTime
(t0:_, t1:_) <- doActionTwiceWithDelay 500000 timeinfos
c1 <- cpuTime
let ts = M.elems $ combineTimeInfos t0 t1
sts = take n $ sortBy (flip (comparing tm)) ts
tm (TI _ t) = t
lapse = fromIntegral (c1 - c0) / 100
norm (TI nm t) = TI nm (t/lapse)
return $ if lapse > 0 then map norm sts else sts
showTimeInfo :: Timeinfo -> Monitor [String]
showTimeInfo (TI n t) = showInfo n (showDigits 2 t) t
runTopCpu :: [String] -> Monitor String
runTopCpu _ = do
ps <- io $ topTimeProcesses 5
pstr <- mapM showTimeInfo ps
parseTemplate $ concat pstr
|
