This is gonna be fun...

gistfile1.txt

Platform found : Advanced Micro Devices, Inc.


Device 0:             Kalindi
Build:               DEBUG (**NOTE: this is compiled as "release" and definitely no -O3, not sure where this comes from)
Pixel format:         CL_RGBA / CL_UNSIGNED_INT32
Image width:           1024
Image height:          1024
Image origin:          0  0
Image region:          1024  1024
Image size in bytes:   16777216
Region size in bytes:  16777216
Global work items X:   1024
Global work items Y:   8
Total work items:      8192
Pixels per thread:     128
Local work items X:    16
Local work items Y:    8
Number of groups:      64
Timing loops:          10
Repeats:               1
Kernel loops:          100
Kernel launches:       1

inputImage:           CL_MEM_READ_ONLY
outputImage:          CL_MEM_WRITE_ONLY

Host baseline (single thread, naive):

                Timer resolution    257 ns
                      Page fault   4228 ns
                        CPU read   4.07 GB/s
                        memcpy()   4.11 GB/s
                     memset(,1,)   4.42 GB/s
                     memset(,0,)   4.40 GB/s


AVERAGES (over loops 2 - 9, use -l for complete log)
--------


1. Host mapped write to inputImage

       clEnqueueMapImage(WRITE):  0.007238 s [     2.32 GB/s ]
                       memset():  0.010836 s       1.55 GB/s
      clEnqueueUnmapMemObject():  0.005763 s [     2.91 GB/s ]

2. GPU kernel read of inputImage

       clEnqueueNDRangeKernel():  0.154124 s      10.89 GB/s
                 verification ok

3. GPU kernel write to outputImage

       clEnqueueNDRangeKernel():  0.203785 s       8.23 GB/s

4. Host mapped read of outputImage

        clEnqueueMapImage(READ):  0.006493 s [     2.58 GB/s ]
                       CPU read:  0.011416 s       1.47 GB/s
                 verification ok
      clEnqueueUnmapMemObject():  0.000049 s [   342.67 GB/s ]


Passed!