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|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.MultiCpu
-- Copyright : (c) Jose A Ortega Ruiz
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose A Ortega <jao@gnu.org>
-- Stability : unstable
-- Portability : unportable
--
-- A multi-cpu monitor for Xmobar
--
-----------------------------------------------------------------------------
module Plugins.Monitors.MultiCpu(multiCpuConfig, runMultiCpu) where
import Plugins.Monitors.Common
import qualified Data.ByteString.Lazy.Char8 as B
import Data.List (isPrefixOf,intersperse,transpose,unfoldr)
multiCpuConfig :: IO MConfig
multiCpuConfig =
mkMConfig "Cpu: <total>%" $
map ("auto" ++) monitors
++ [ k ++ n | n <- "" : map show [0 :: Int ..]
, k <- monitors]
where monitors = ["bar","total","user","nice","system","idle"]
cpuData :: IO [[Float]]
cpuData = do s <- B.readFile "/proc/stat"
return $ cpuParser s
cpuParser :: B.ByteString -> [[Float]]
cpuParser = map parseList . cpuLists
where cpuLists = takeWhile isCpu . map B.words . B.lines
isCpu (w:_) = "cpu" `isPrefixOf` B.unpack w
isCpu _ = False
parseList = map (read . B.unpack) . tail
parseCpuData :: IO [[Float]]
parseCpuData =
do (as, bs) <- doActionTwiceWithDelay 950000 cpuData
let p0 = zipWith percent bs as
return p0
percent :: [Float] -> [Float] -> [Float]
percent b a = if tot > 0 then map (/ tot) $ take 4 dif else [0, 0, 0, 0]
where dif = zipWith (-) b a
tot = foldr (+) 0 dif
formatMultiCpus :: [[Float]] -> Monitor [String]
formatMultiCpus [] = return $ repeat ""
formatMultiCpus xs = fmap concat $ mapM formatCpu xs
formatCpu :: [Float] -> Monitor [String]
formatCpu xs
| length xs < 4 = showPercentsWithColors $ replicate 6 0.0
| otherwise = let t = foldr (+) 0 $ take 3 xs
in do b <- showPercentBar (100 * t) t
ps <- showPercentsWithColors (t:xs)
return (b:ps)
splitEvery :: (Eq a) => Int -> [a] -> [[a]]
splitEvery n = unfoldr (\x -> if x == []
then Nothing
else Just $ splitAt n x)
groupData :: [String] -> [[String]]
groupData = transpose . tail . splitEvery 6
formatAutoCpus :: [String] -> Monitor [String]
formatAutoCpus [] = return $ replicate 6 ""
formatAutoCpus xs = return $ map concat . map (intersperse " ") $ groupData xs
runMultiCpu :: [String] -> Monitor String
runMultiCpu _ =
do c <- io parseCpuData
l <- formatMultiCpus c
a <- formatAutoCpus l
parseTemplate (a ++ l)
|
