Developer Reference
Intel® oneAPI Math Kernel Library Vector Mathematics Performance and Accuracy Data
                    
                        ID
                        772989
                    
                
                
                    Date
                    12/04/2020
                
                
                    Public
                
            Acospi
Computes the inverse cosine of vector elements divided by π.
Performance:
| Intel® Xeon® Processor E5-2680 | Intel® Xeon® Processor E5-2699 v3 | Intel® Xeon® Processor E5-2699 v4 | Intel® Xeon® Gold 6148 Processor | ||
|---|---|---|---|---|---|
| single | HA | 3.55 | 2.74 | 2.68 | 1.79 | 
| LA | 2.81 | 1.98 | 1.78 | 1.21 | |
| EP | 2.79 | 1.87 | 1.59 | 0.91 | |
| double | HA | 9.98 | 7.43 | 6.83 | 3.84 | 
| LA | 8.23 | 7.12 | 6.02 | 3.70 | |
| EP | 6.21 | 4.82 | 4.27 | 2.59 | |
      Notes: 
    
 
    - Units - CPE (Clocks per Element)
- Performance was measured on "working" interval (double precision: [ -1.0, 1.0 ]; single precision: [ -1.0, 1.0 ]) 
- Data - vectors of 1000 elements with random generated numbers. 
- All data was collected with 64-bit libraries. 
Accuracy:
| Intel® Xeon® Processor E5-2680 | Intel® Xeon® Processor E5-2699 v3 | Intel® Xeon® Processor E5-2699 v4 | Intel® Xeon® Gold 6148 Processor | ||
|---|---|---|---|---|---|
| single | HA | 0.79 | 0.79 | 0.79 | 0.95 | 
| LA | 2.46 | 2.46 | 2.46 | 2.46 | |
| EP | 531.57 | 531.57 | 531.57 | 531.57 | |
| double | HA | 0.80 | 0.80 | 0.80 | 0.80 | 
| LA | 2.23 | 2.23 | 2.23 | 2.23 | |
| EP | 4.85E+06 | 4.85E+06 | 4.85E+06 | 4.48E+06 | |
      NOTE: 
    
 Units - ULP (Units in the Last Place). 
   Performance Graphs:




 Parent topic: Trigonometric Functions