#4970: time002 and time004 (ghci) test failures on OS X 64 bit
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Reporter: gwright | Owner: igloo
Type: bug | Status: new
Priority: high | Milestone: 7.2.1
Component: GHCi | Version: 7.0.1
Resolution: | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: MacOS X
Blocking: | Architecture: x86_64 (amd64)
Failure: Incorrect result at runtime |
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Changes (by AntoineLatter):
* cc: AntoineLatter (added)
Comment:
I'm getting this issue in compiled code - the benchmark suite in the
binary package produces great values for MB/s throughput.
A simple:
{{{
import System.CPUTime
import Control.Concurrent
main :: IO ()
main = do
t1 <- getCPUTime -- in picoseconds
threadDelay (10^6) -- in microseconds
t2 <- getCPUTime
print $ fromIntegral (t2 - t1) / 10^12 -- should print ~1
}}}
produces nearly random output when compiled. At minimum the output should
never be negative :-)
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4970#comment:13>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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