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{- Copyright (c) 2011 Luis Cabellos,
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* Neither the name of nor the names of other
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-}
import Control.Parallel.OpenCL
import Foreign( castPtr, nullPtr, sizeOf )
import Foreign.C.Types( CFloat )
import Foreign.Marshal.Array( peekArray, withArray )
import Data.List( foldl' )
import Control.Monad( forM_, forM )
programSource :: String
programSource = "__kernel void duparray(__global float *in, __global float *out ){\n int id = get_global_id(0);\n out[id] = 2*in[id] + id;\n}"
sumres :: Num a => (a,a,a) -> (a,a,a) -> (a,a,a)
sumres (t1,t2,t3) (u1,u2,u3) = (t1+u1,t2+u2,t3+u3)
main :: IO ()
main = do
-- Initialize OpenCL
(platform:_) <- clGetPlatformIDs
(dev:_) <- clGetDeviceIDs platform CL_DEVICE_TYPE_ALL
context <- clCreateContext [] [dev] print
q <- clCreateCommandQueue context dev [CL_QUEUE_PROFILING_ENABLE]
-- Initialize Kernel
program <- clCreateProgramWithSource context programSource
clBuildProgram program [dev] ""
kernel <- clCreateKernel program "duparray"
-- run tests
forM_ [100,200..30000] $ \s -> do
let original = [0 .. s] :: [CFloat]
n = 50 :: Double
res <- forM [0..n] $ \_ -> do
(t1,t2,t3,_) <- executeArray original context q kernel
return (t1,t2,t3)
let (t1,t2,t3) = foldl' sumres (0,0,0) res
putStrLn $ show s ++ "\t" ++ show (fromIntegral t1/n) ++ "\t" ++ show (fromIntegral t2/n) ++ "\t" ++ show (fromIntegral t3/n)
return ()
executeArray :: [CFloat] -> CLContext -> CLCommandQueue -> CLKernel -> IO (CLulong, CLulong, CLulong, [CFloat])
executeArray original ctx q krn = withArray original $ \input -> do
mem_in <- clCreateBuffer ctx [CL_MEM_READ_ONLY] (vecSize, nullPtr)
mem_out <- clCreateBuffer ctx [CL_MEM_WRITE_ONLY] (vecSize, nullPtr)
clSetKernelArgSto krn 0 mem_in
clSetKernelArgSto krn 1 mem_out
-- Put Input
eventWrite <- clEnqueueWriteBuffer q mem_in True 0 vecSize (castPtr input) []
-- Execute Kernel
eventExec <- clEnqueueNDRangeKernel q krn [length original] [1] [eventWrite]
-- Get Result
eventRead <- clEnqueueReadBuffer q mem_out True 0 vecSize (castPtr input) [eventExec]
_ <- clWaitForEvents [eventRead]
t_start0 <- clGetEventProfilingInfo eventWrite CL_PROFILING_COMMAND_START
t_end0 <- clGetEventProfilingInfo eventWrite CL_PROFILING_COMMAND_END
let t_write = t_end0 - t_start0
t_start1 <- clGetEventProfilingInfo eventExec CL_PROFILING_COMMAND_START
t_end1 <- clGetEventProfilingInfo eventExec CL_PROFILING_COMMAND_END
let t_exec = t_end1 - t_start1
t_start2 <- clGetEventProfilingInfo eventRead CL_PROFILING_COMMAND_START
t_end2 <- clGetEventProfilingInfo eventRead CL_PROFILING_COMMAND_END
let t_read = t_end2 - t_start2
result <- peekArray (length original) input
return (t_write,t_exec,t_read,result)
where
elemSize = sizeOf (0 :: CFloat)
vecSize = elemSize * length original
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