RDMSR - Throughput and Uops
With unroll_count=500 and no inner loop
- Code:
0: 0f 32 rdmsr
- Init:
MOV RCX, 0xE7
- Show nanoBench command
- Results:
- Instructions retired: 1.0
- Core cycles: 51.0
- Reference cycles: 38.34
- UOPS_EXECUTED.THREAD: 54.0
- RETIRE_SLOTS: 62.0
- UOPS_MITE: 0.0
- UOPS_MS: 62.0
- UOPS_PORT_0: 9.0
- UOPS_PORT_1: 8.0
- UOPS_PORT_6: 17.0
- UOPS_PORT_49: 0.0
- UOPS_PORT_78: 0.0
- UOPS_PORT_5B: 20.0
- UOPS_PORT_5B>=2: 6.0
- UOPS_PORT_23A: 0.0
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 0.0
With unroll_count=500, no inner loop, and 1 NOP
- Code:
0: 0f 32 rdmsr
2: 90 nop
- Init:
MOV RCX, 0xE7
- Show nanoBench command
- Results:
- Instructions retired: 2.0
- Core cycles: 52.0
- Reference cycles: 39.04
- UOPS_EXECUTED.THREAD: 54.0
- RETIRE_SLOTS: 63.0
- UOPS_MITE: 1.0
- UOPS_MS: 62.0
- UOPS_PORT_0: 9.0
- UOPS_PORT_1: 8.0
- UOPS_PORT_6: 18.0
- UOPS_PORT_49: 0.0
- UOPS_PORT_78: 0.0
- UOPS_PORT_5B: 19.0
- UOPS_PORT_5B>=2: 3.0
- UOPS_PORT_23A: 0.0
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 1.0
With loop_count=1000 and unroll_count=10
- Code:
0: 0f 32 rdmsr
- Init:
MOV RCX, 0xE7
- Show nanoBench command
- Results:
- Instructions retired: 1.2
- Core cycles: 51.0
- Reference cycles: 38.38
- UOPS_EXECUTED.THREAD: 54.1
- RETIRE_SLOTS: 62.1
- UOPS_MITE: 0.1
- UOPS_MS: 62.0
- UOPS_PORT_0: 8.9
- UOPS_PORT_1: 8.1
- UOPS_PORT_6: 17.1
- UOPS_PORT_49: 0.0
- UOPS_PORT_78: 0.0
- UOPS_PORT_5B: 20.0
- UOPS_PORT_5B>=2: 5.1
- UOPS_PORT_23A: 0.0
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 0.1
With loop_count=100 and unroll_count=100
- Code:
0: 0f 32 rdmsr
- Init:
MOV RCX, 0xE7
- Show nanoBench command
- Results:
- Instructions retired: 1.02
- Core cycles: 51.0
- Reference cycles: 38.38
- UOPS_EXECUTED.THREAD: 54.01
- RETIRE_SLOTS: 62.01
- UOPS_MITE: 0.01
- UOPS_MS: 62.0
- UOPS_PORT_0: 8.99
- UOPS_PORT_1: 8.01
- UOPS_PORT_6: 17.01
- UOPS_PORT_49: 0.0
- UOPS_PORT_78: 0.0
- UOPS_PORT_5B: 20.0
- UOPS_PORT_5B>=2: 4.02
- UOPS_PORT_23A: 0.0
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 0.01