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Beginner
87 Views

whe num_compute_units can't work?

I do convolutional neural networks with de1_soc FPGA,I use no num_compute_units and num_simd_work_items in kernel,the FPGA utilization like this:

+--------------------------------------------------------------------+
; Estimated Resource Usage Summary                                   ;
+----------------------------------------+---------------------------+
; Resource                               + Usage                     ;
+----------------------------------------+---------------------------+
; Logic utilization                      ;   34%                     ;
; ALUTs                                  ;   22%                     ;
; Dedicated logic registers              ;   13%                     ;
; Memory blocks                          ;   16%                     ;
; DSP blocks                             ;   15%                     ;
+----------------------------------------+---------------------------;

and the work consume about 2750 ms.

then i use num_compute_units(4) to increase utilization。the FPGA utilization like this:

+--------------------------------------------------------------------+
; Estimated Resource Usage Summary                                   ;
+----------------------------------------+---------------------------+
; Resource                               + Usage                     ;
+----------------------------------------+---------------------------+
; Logic utilization                      ;   75%                     ;
; ALUTs                                  ;   48%                     ;
; Dedicated logic registers              ;   32%                     ;
; Memory blocks                          ;   56%                     ;
; DSP blocks                             ;   61%                     ;
+----------------------------------------+---------------------------;

but the work consume about 3750 ms.

Why did I use num_compute_units to improve the utilization of fpga, but did not get the better results.

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1 Reply
Nikky_P_Intel
Moderator
87 Views

Hi,
 

Thank you for raising this query, we best prefer you to post your query in the below forums for better communication:
https://forums.intel.com/s/
 

Regards,
Nikky Priya
Intel Developer Zone

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