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import Control.Monad
import System.IO
import System.Exit
import System.Environment
import Data.Time.Clock
import System.ZMQ4.Monadic
import qualified Data.ByteString as SB
main :: IO ()
main = do
args <- getArgs
when (length args /= 3) $ do
hPutStrLn stderr usage
exitFailure
let connTo = args !! 0
size = read $ args !! 1
rounds = read $ args !! 2
message = SB.replicate size 0x65
runZMQ $ do
s <- socket Req
connect s connTo
start <- liftIO $ getCurrentTime
loop s rounds message
end <- liftIO $ getCurrentTime
liftIO $ print (diffUTCTime end start)
where
loop s r msg = unless (r <= 0) $ do
send s [] msg
msg' <- receive s
when (SB.length msg' /= SB.length msg) $
error "message of incorrect size received"
loop s (r - 1) msg
usage :: String
usage = "usage: remote_lat <connect-to> <message-size> <roundtrip-count>"
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