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Altera_Forum's avatar
Altera_Forum
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8 years ago

Obtaining different results while executing a kernel on GPU or FPGA

Hello, I have got another question concerning OpenCL. My problem: When I execute the same kernel on GPU and on FPGA (pre-compiled binary), I get different results when I read the buffer ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Thank you for your answer!

The results are quite different. A sample is shown below: 


FPGA:
w: 	0
m: 	0.1	51410	0.1	0	
P: 	8.25	13.5	0	0	
	-879.562	-1435.38	-0.0762125	-0.124711	
	0	0	8.25	13.5	
	0	0	13.5	26	
	
w: 	0
m: 	0.1	56227.3	0.1	0	
P: 	8.25	13.5	0	0	
	-879.562	-1435.38	-0.0762125	-0.124711	
	0	0	8.25	13.5	
	0	0	13.5	26	
	
w: 	0
m: 	0.1	95197.5	0.1	0	
P: 	8.25	13.5	0	0	
	-879.562	-1435.38	-0.0762125	-0.124711	
	0	0	8.25	13.5	
	0	0	13.5	26	
	
w: 	0
m: 	0.1	85130.8	0.1	0	
P: 	8.25	13.5	0	0	
	-879.562	-1435.38	-0.0762125	-0.124711	
	0	0	8.25	13.5	
	0	0	13.5	26	
	
w: 	0
m: 	0.1	68243.1	0.1	0	
P: 	8.25	13.5	0	0	
	-879.562	-1435.38	-0.0762125	-0.124711	
	0	0	8.25	13.5	
	0	0	13.5	26	
	
w: 	0
m: 	0	0	0	0	
P: 	0	0	0	0	
	0	0	0	0	
	0	0	0	0	
	0	0	0	0
GPU:
w: 	0
m: 	4.48707	0	2.19607	0	
P: 	8.17379	13.3753	0	0	
	13.5	26	0	0	
	0	0	8.17379	13.3753	
	0	0	13.5	26	
	
w: 	0
m: 	4.89815	0	2.33002	0	
P: 	8.17379	13.3753	0	0	
	13.5	26	0	0	
	0	0	8.17379	13.3753	
	0	0	13.5	26	
	
w: 	0
m: 	8.22379	0	2.51016	0	
P: 	8.17379	13.3753	0	0	
	13.5	26	0	0	
	0	0	8.17379	13.3753	
	0	0	13.5	26	
	
w: 	0
m: 	7.36467	0	3.0552	0	
P: 	8.17379	13.3753	0	0	
	13.5	26	0	0	
	0	0	8.17379	13.3753	
	0	0	13.5	26	
	
w: 	0
m: 	5.92356	0	2.4224	0	
P: 	8.17379	13.3753	0	0	
	13.5	26	0	0	
	0	0	8.17379	13.3753	
	0	0	13.5	26	
	
w: 	0
m: 	0	0	0	0	
P: 	0	0	0	0	
	0	0	0	0	
	0	0	0	0	
	0	0	0	0