diff options
Diffstat (limited to 'Cost.hs')
| -rw-r--r-- | Cost.hs | 13 |
1 files changed, 7 insertions, 6 deletions
@@ -22,7 +22,7 @@ totalCost (CPUCost s _) = (s, [UsingCPU]) raiseCostPower :: Cost c -> Entropy e -> Cost c raiseCostPower c (Entropy e) = mapCost (* 2^e) c -mapCost :: (Integer -> Integer) -> Cost op -> Cost op +mapCost :: (Rational-> Rational) -> Cost op -> Cost op mapCost f (CPUCost (Seconds n) d) = CPUCost (Seconds (f n)) d type NumCores = Integer @@ -30,14 +30,15 @@ type NumCores = Integer showCostMinutes :: NumCores -> Cost op -> String showCostMinutes numcores (CPUCost (Seconds n) (Divisibility d)) | n' < 61 = "1 minute" - | otherwise = show (n' `div` 60) ++ " minutes" + | otherwise = show (n' / 60) ++ " minutes" where - n' = n `div` min numcores d + n' :: Double + n' = fromRational n / fromIntegral (min numcores d) -- If an operation took n seconds on a number of cores, -- multiply to get the CPUCost, which is for a single core. coreCost :: NumCores -> Seconds -> Divisibility -> Cost op -coreCost cores (Seconds n) d = CPUCost (Seconds (cores * n)) d +coreCost cores (Seconds n) d = CPUCost (Seconds (fromIntegral cores * n)) d castCost :: Cost a -> Cost b castCost (CPUCost s d) = CPUCost s d @@ -82,11 +83,11 @@ estimateAttackCost :: DataCenterPrice -> Cost BruteForceOp -> Dollars estimateAttackCost dc opcost = centsToDollars $ costcents where (Seconds cpuseconds) = fst (totalCost opcost) - cpuyears = cpuseconds `div` (60*60*24*365) + cpuyears = cpuseconds / (60*60*24*365) costpercpuyear = Cents $ fromIntegral (instanceCostPerHour dc) * 24 * 365 `div` (instanceCpuCores dc * instanceCpuCoreMultiplier dc) - costcents = Cents cpuyears * costpercpuyear + costcents = Cents (ceiling cpuyears) * costpercpuyear newtype Cents = Cents Integer deriving (Num, Integral, Enum, Real, Ord, Eq, Show) |