RDRAND (R32) - Throughput and Uops

With unroll_count=10 and no inner loop

• Code:

     0:	41 0f c7 f0          	rdrand r8d
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.0
  • Core cycles: 1347.4
  • Reference cycles: 1011.2
  • UOPS_EXECUTED.THREAD: 20.9
  • RETIRE_SLOTS: 24.0
  • UOPS_MITE: 0.1
  • UOPS_MS: 23.9
  • UOPS_PORT_0: 4.97
  • UOPS_PORT_1: 7.42
  • UOPS_PORT_6: 6.6
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 3.2
  • UOPS_PORT_5B>=2: 0.0
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.37

With unroll_count=10, no inner loop, and 1 NOP

• Code:

     0:	41 0f c7 f0          	rdrand r8d
     4:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 2.0
  • Core cycles: 1346.43
  • Reference cycles: 1012.8
  • UOPS_EXECUTED.THREAD: 20.83
  • RETIRE_SLOTS: 25.0
  • UOPS_MITE: 1.2
  • UOPS_MS: 23.0
  • UOPS_PORT_0: 3.2
  • UOPS_PORT_1: 9.2
  • UOPS_PORT_6: 5.7
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 4.1
  • UOPS_PORT_5B>=2: 0.8
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.1

With unroll_count=10, no inner loop, and 2 NOPs

• Code:

     0:	41 0f c7 f0          	rdrand r8d
     4:	90                   	nop
     5:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 3.0
  • Core cycles: 1380.05
  • Reference cycles: 1036.8
  • UOPS_EXECUTED.THREAD: 20.8
  • RETIRE_SLOTS: 26.0
  • UOPS_MITE: 0.4
  • UOPS_MS: 22.9
  • UOPS_PORT_0: 5.9
  • UOPS_PORT_1: 7.4
  • UOPS_PORT_6: 4.8
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 4.1
  • UOPS_PORT_5B>=2: 0.0
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.1

With unroll_count=10, no inner loop, and 3 NOPs

• Code:

     0:	41 0f c7 f0          	rdrand r8d
     4:	90                   	nop
     5:	90                   	nop
     6:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 4.0
  • Core cycles: 1375.9
  • Reference cycles: 1036.8
  • UOPS_EXECUTED.THREAD: 21.2
  • RETIRE_SLOTS: 27.0
  • UOPS_MITE: 3.6
  • UOPS_MS: 22.1
  • UOPS_PORT_0: 3.2
  • UOPS_PORT_1: 10.1
  • UOPS_PORT_6: 4.8
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 4.1
  • UOPS_PORT_5B>=2: 0.9
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.1

With unroll_count=10, no inner loop, and 4 NOPs

• Code:

     0:	41 0f c7 f0          	rdrand r8d
     4:	90                   	nop
     5:	90                   	nop
     6:	90                   	nop
     7:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 5.0
  • Core cycles: 1369.28
  • Reference cycles: 1028.8
  • UOPS_EXECUTED.THREAD: 21.0
  • RETIRE_SLOTS: 28.0
  • UOPS_MITE: 2.8
  • UOPS_MS: 23.2
  • UOPS_PORT_0: 3.2
  • UOPS_PORT_1: 7.4
  • UOPS_PORT_6: 4.8
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 6.8
  • UOPS_PORT_5B>=2: 0.9
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.1

With unroll_count=10, no inner loop, and 5 NOPs

• Code:

     0:	41 0f c7 f0          	rdrand r8d
     4:	90                   	nop
     5:	90                   	nop
     6:	90                   	nop
     7:	90                   	nop
     8:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 1379.78
  • Reference cycles: 1036.8
  • UOPS_EXECUTED.THREAD: 21.13
  • RETIRE_SLOTS: 29.0
  • UOPS_MITE: 5.13
  • UOPS_MS: 25.2
  • UOPS_PORT_0: 4.1
  • UOPS_PORT_1: 7.4
  • UOPS_PORT_6: 4.8
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 5.9
  • UOPS_PORT_5B>=2: 0.9
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.1

With unroll_count=10, no inner loop, and 6 NOPs

• Code:

     0:	41 0f c7 f0          	rdrand r8d
     4:	90                   	nop
     5:	90                   	nop
     6:	90                   	nop
     7:	90                   	nop
     8:	90                   	nop
     9:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 1373.05
  • Reference cycles: 1032.0
  • UOPS_EXECUTED.THREAD: 21.2
  • RETIRE_SLOTS: 30.0
  • UOPS_MITE: 6.6
  • UOPS_MS: 22.8
  • UOPS_PORT_0: 5.0
  • UOPS_PORT_1: 7.4
  • UOPS_PORT_6: 5.7
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 4.1
  • UOPS_PORT_5B>=2: 0.0
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.12

With unroll_count=10, no inner loop, and 7 NOPs

• Code:

     0:	41 0f c7 f0          	rdrand r8d
     4:	90                   	nop
     5:	90                   	nop
     6:	90                   	nop
     7:	90                   	nop
     8:	90                   	nop
     9:	90                   	nop
     a:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 8.0
  • Core cycles: 1378.8
  • Reference cycles: 1035.2
  • UOPS_EXECUTED.THREAD: 21.2
  • RETIRE_SLOTS: 31.0
  • UOPS_MITE: 7.6
  • UOPS_MS: 22.8
  • UOPS_PORT_0: 4.1
  • UOPS_PORT_1: 9.2
  • UOPS_PORT_6: 5.7
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 3.2
  • UOPS_PORT_5B>=2: 0.0
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.9

With loop_count=10 and unroll_count=1

• Code:

     0:	41 0f c7 f0          	rdrand r8d
  

• Show nanoBench command
• Results:
  • Instructions retired: 3.0
  • Core cycles: 1379.68
  • Reference cycles: 1036.8
  • UOPS_EXECUTED.THREAD: 22.13
  • RETIRE_SLOTS: 27.68
  • UOPS_MITE: -1.72
  • UOPS_MS: 9.3
  • UOPS_PORT_0: 4.07
  • UOPS_PORT_1: 7.62
  • UOPS_PORT_6: 5.8
  • UOPS_PORT_49: 0.0
  • UOPS_PORT_78: 0.0
  • UOPS_PORT_5B: 5.7
  • UOPS_PORT_5B>=2: 0.8
  • UOPS_PORT_23A: 1.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.25