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|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Cpu.FreeBSD
-- Copyright : (c) 2011, 2017 Jose Antonio Ortega Ruiz
-- (c) 2007-2010 Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
-- Stability : unstable
-- Portability : unportable
--
-- A cpu monitor for Xmobar
--
-----------------------------------------------------------------------------
module Xmobar.Plugins.Monitors.Cpu.FreeBSD (parseCpu
, CpuDataRef
, cpuData) where
import Xmobar.Plugins.Monitors.Cpu.Common (CpuData(..))
import Data.IORef (IORef, readIORef, writeIORef)
import System.BSD.Sysctl (sysctlPeekArray)
-- kern.cp_time data from the previous iteration for computing the difference
type CpuDataRef = IORef [Word]
cpuData :: IO [Word]
cpuData = sysctlPeekArray "kern.cp_time" :: IO [Word]
parseCpu :: CpuDataRef -> IO CpuData
parseCpu cref = do
prev <- readIORef cref
curr <- cpuData
writeIORef cref curr
let diff = map fromIntegral $ zipWith (-) curr prev
user = head diff
nice = diff !! 1
system = diff !! 2
intr = diff !! 3
idle = diff !! 4
total = user + nice + system + intr + idle
cpuUserPerc = if total > 0 then user/total else 0
cpuNicePerc = if total > 0 then nice/total else 0
cpuSystemPerc = if total > 0 then (system+intr)/total else 0
cpuIdlePerc = if total > 0 then idle/total else 0
return CpuData
{ cpuUser = cpuUserPerc
, cpuNice = cpuNicePerc
, cpuSystem = cpuSystemPerc
, cpuIdle = cpuIdlePerc
, cpuIowait = 0
, cpuTotal = cpuUserPerc+cpuSystemPerc
}
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