SHARC Processor Benchmarks

Real-time signal processing tasks are I/O and computationally intensive. In addition to high-speed math units and all instructions executing in a single-cycle, including single-cycle multiply accumulates (MACs), SHARC Processors are designed for maximum I/O and memory access bandwidth. This balance of core speed, memory integration and I/O bandwidth achieves the sustained performance critical to real-time applications.

Benchmarks are important in that they show how a particular DSP performs in the context of an application. The smaller the benchmark number, the quicker the algorithm execution. If a DSP can perform the task quicker, the processor can perform more tasks in a given amount of time. Just looking at the cycle time, clock speed or MIPS of a DSP can not give an accurate indication of the true performance of the processor. Therefore it's important to analyze algorithm benchmarks, not only clock speed and cycle time.


  ADSP-21160N
ADSP-21161N
SIMD 		 ADSP-21261
SIMD 		 ADSP-21262
ADSP-21266
SIMD		 ADSP-21371
ADSP-21375
SIMD 		 ADSP-21364
ADSP-21365
SIMD 		 ADSP-21368
ADSP-21369
SIMD 		 ADSP-2146x
SIMD 		 ADSP-2158x
ADSP-SC58x
SIMD
Clock Cycle  100 MHz 
 150 MHz  200 MHz  266 MHz  333 MHz  400 MHz 450 MHz 450 MHz per core (2 DSP cores)
Instruction Cycle Time 10 ns 6.67 ns 5 ns 3.75 ns
 3 ns 2.5 ns 2.22 ns 2.22 ns per core
MFLOPS Sustained 400 MFLOPS 600 MFLOPS 800 MFLOPS 1064 MFLOPS 1332 MFLOPS 1600 MFLOPS 1800 MFLOPS 3600 MFLOPS
MFLOPS Peak 600 MFLOPS 900 MFLOPS 1200 MFLOPS 1596 MFLOPS 1998 MFLOPS 2400 MFLOPS 2700 MFLOPS 5400 MFLOPS
1024-Pt Complex FFT (Radix 2)

Using Library Code

Using FFT H/W Accelerator		  

109.72 µs		  
73.18 µs		  
54.86 µs		  
41.15 µs		  
32.91 µs		  
27.43 us		  
24.36 µs		  
 24.58 µs
N/A N/A N/A N/A N/A N/A 176.11 µs 5.53 µs
FIR Filter (per tap)
5 ns 3.3 ns 2.5 ns 1.88 ns 1.5 ns 1.25 ns 1.11 ns 1.11 ns
IIR Filter (per biquad) 20 ns 13.3 ns 10 ns 7.5 ns 6 ns 5 ns 4.43 ns 4.43 ns
Matrix Multiply (pipelined)

[3x3] * [3x1]

[4x4] * [4x1]		  

45 ns
  
30 ns
  
22.5 ns
  
16.91 ns
  
13.5 ns
  
11.25 ns
  
10.00 ns
  
10.00 ns
80 ns 53.3 ns 40 ns 30.07 ns
 24 ns 20 ns 17.78 ns 17.78 ns
Divide (y/x) 30 ns 20 ns 15 ns 11.27 ns
 9 ns 7.5 ns 6.67 ns 6.67 ns
Inverse Square Root 45 ns 30 ns 22.5 ns 16.91 ns
 13.5 ns  11.25 ns 10.00 ns 10.00 ns

4.43 ns