Hi,
I am using AMD Radeon HD 6770 Graphics Card and installed AMD SDKv2.7 & Catalyst Driver12.8 on RHEL6.0 . While running the "FFT" sample program on cpu device (Intel Core2 Duo) and gpu device with timing option , on cpu device the program is running faster than on gpu .
[root@localhost x86]# ./FFT -t
Platform 0 : Advanced Micro Devices, Inc.
Original Input Real
15.3732 201.81 51.9855 89.2322 92.572 34.4675 96.2478 66.3863 11.345 225.168
Original Input Img
0.0600514 0.788318 0.203068 0.348563 0.361609 0.134639 0.375968 0.259322 0.0443163 0.879562
Platform found : Advanced Micro Devices, Inc.
Selected Platform Vendor : Advanced Micro Devices, Inc.
Device 0 : Juniper Device ID is 0x9bee888
Build Options are : -x clc++
Executing kernel for 1 iterations
-------------------------------------------
Output real
131643 -1085.95 -997.15 -1791.52 532.118 1659.74 -166.271 969.692 1189.76 -862.707
Output img
514.23 2289.84 936.489 -603.839 699.7 1018.18 1900.06 795.439 -1328.03 -293.334
Length Time(sec) [Transfer+Kernel]Time(sec)
26214400 0.932 0.492
And with CPU ,
[root@localhost x86]# ./FFT -t --device cpu
Platform 0 : Advanced Micro Devices, Inc.
Original Input Real
15.3732 201.81 51.9855 89.2322 92.572 34.4675 96.2478 66.3863 11.345 225.168
Original Input Img
0.0600514 0.788318 0.203068 0.348563 0.361609 0.134639 0.375968 0.259322 0.0443163 0.879562
Platform found : Advanced Micro Devices, Inc.
Selected Platform Vendor : Advanced Micro Devices, Inc.
Device 0 : Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz Device ID is 0x8d62ab8
Build Options are : -x clc++
Executing kernel for 1 iterations
-------------------------------------------
Output real
131643 -1085.95 -997.15 -1791.52 532.119 1659.74 -166.27 969.692 1189.76 -862.707
Output img
514.23 2289.84 936.49 -603.839 699.7 1018.18 1900.06 795.439 -1328.03 -293.334
Length Time(sec) [Transfer+Kernel]Time(sec)
26214400 0.695 0.294
How can I increase performance with GPU ?
Thanks
