ADC_R0 (R8l, 0) - Throughput and Uops

With unroll_count=500 and no inner loop

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.0
  • Core cycles: 2.0
  • Reference cycles: 1.79
  • UOPS_EXECUTED.THREAD: 2.0
  • RETIRE_SLOTS: 2.0
  • UOPS_MITE: 2.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.7
  • UOPS_PORT_1: 0.61
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.7
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.0

With unroll_count=500, no inner loop, and 1 NOP

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 2.0
  • Core cycles: 2.0
  • Reference cycles: 1.79
  • UOPS_EXECUTED.THREAD: 2.0
  • RETIRE_SLOTS: 3.0
  • UOPS_MITE: 3.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.69
  • UOPS_PORT_1: 0.62
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.7
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.0

With unroll_count=500, no inner loop, and 2 NOPs

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	90                   	nop
     5:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 3.0
  • Core cycles: 2.0
  • Reference cycles: 1.79
  • UOPS_EXECUTED.THREAD: 2.0
  • RETIRE_SLOTS: 4.0
  • UOPS_MITE: 4.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.7
  • UOPS_PORT_1: 0.6
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.71
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.0

With unroll_count=500, no inner loop, and 3 NOPs

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	90                   	nop
     5:	90                   	nop
     6:	90                   	nop
  

• Show nanoBench command
• Results:
  • Instructions retired: 4.0
  • Core cycles: 2.0
  • Reference cycles: 1.78
  • UOPS_EXECUTED.THREAD: 2.0
  • RETIRE_SLOTS: 5.0
  • UOPS_MITE: 5.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.75
  • UOPS_PORT_1: 0.64
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.61
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 2.0

With loop_count=1000 and unroll_count=10

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.2
  • Core cycles: 2.0
  • Reference cycles: 1.78
  • UOPS_EXECUTED.THREAD: 2.1
  • RETIRE_SLOTS: 2.1
  • UOPS_MITE: 0.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.68
  • UOPS_PORT_1: 0.61
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.81
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.0

With loop_count=100 and unroll_count=100

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.02
  • Core cycles: 2.0
  • Reference cycles: 1.78
  • UOPS_EXECUTED.THREAD: 2.01
  • RETIRE_SLOTS: 2.01
  • UOPS_MITE: 0.02
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.69
  • UOPS_PORT_1: 0.61
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.71
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.01

With additional dependency-breaking instructions

With unroll_count=500 and no inner loop

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 2.0
  • Core cycles: 2.0
  • Reference cycles: 1.79
  • UOPS_EXECUTED.THREAD: 3.0
  • RETIRE_SLOTS: 3.0
  • UOPS_MITE: 3.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.91
  • UOPS_PORT_1: 1.22
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.87
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 1.0

With loop_count=1000 and unroll_count=10

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 2.2
  • Core cycles: 2.0
  • Reference cycles: 1.78
  • UOPS_EXECUTED.THREAD: 3.1
  • RETIRE_SLOTS: 3.1
  • UOPS_MITE: 0.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.93
  • UOPS_PORT_1: 1.21
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.96
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.0

With loop_count=100 and unroll_count=100

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 2.02
  • Core cycles: 2.0
  • Reference cycles: 1.78
  • UOPS_EXECUTED.THREAD: 3.01
  • RETIRE_SLOTS: 3.01
  • UOPS_MITE: 0.03
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 0.89
  • UOPS_PORT_1: 1.22
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 0.9
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.01

With unroll_count=200 and no inner loop

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	41 80 d1 00          	adc    r9b,0x0
     8:	41 80 d2 00          	adc    r10b,0x0
     c:	41 80 d3 00          	adc    r11b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 4.0
  • Core cycles: 4.35
  • Reference cycles: 3.81
  • UOPS_EXECUTED.THREAD: 8.0
  • RETIRE_SLOTS: 8.0
  • UOPS_MITE: 8.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 2.66
  • UOPS_PORT_1: 2.57
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 2.77
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 4.0

With loop_count=1000 and unroll_count=2

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	41 80 d1 00          	adc    r9b,0x0
     8:	41 80 d2 00          	adc    r10b,0x0
     c:	41 80 d3 00          	adc    r11b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 5.0
  • Core cycles: 4.23
  • Reference cycles: 3.76
  • UOPS_EXECUTED.THREAD: 8.5
  • RETIRE_SLOTS: 8.5
  • UOPS_MITE: 0.01
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 2.68
  • UOPS_PORT_1: 2.62
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 3.2
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.01

With loop_count=100 and unroll_count=20

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	41 80 d1 00          	adc    r9b,0x0
     8:	41 80 d2 00          	adc    r10b,0x0
     c:	41 80 d3 00          	adc    r11b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 4.1
  • Core cycles: 4.32
  • Reference cycles: 3.84
  • UOPS_EXECUTED.THREAD: 8.05
  • RETIRE_SLOTS: 8.05
  • UOPS_MITE: 0.08
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 2.68
  • UOPS_PORT_1: 2.57
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 2.8
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.04

With additional dependency-breaking instructions

With unroll_count=200 and no inner loop

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
     7:	4d 85 ff             	test   r15,r15
     a:	41 80 d1 00          	adc    r9b,0x0
     e:	4d 85 ff             	test   r15,r15
    11:	41 80 d2 00          	adc    r10b,0x0
    15:	4d 85 ff             	test   r15,r15
    18:	41 80 d3 00          	adc    r11b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 8.0
  • Core cycles: 4.0
  • Reference cycles: 3.52
  • UOPS_EXECUTED.THREAD: 12.0
  • RETIRE_SLOTS: 12.0
  • UOPS_MITE: 12.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 4.0
  • UOPS_PORT_1: 4.0
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 4.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 4.0

With loop_count=1000 and unroll_count=2

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
     7:	4d 85 ff             	test   r15,r15
     a:	41 80 d1 00          	adc    r9b,0x0
     e:	4d 85 ff             	test   r15,r15
    11:	41 80 d2 00          	adc    r10b,0x0
    15:	4d 85 ff             	test   r15,r15
    18:	41 80 d3 00          	adc    r11b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 9.0
  • Core cycles: 4.43
  • Reference cycles: 3.94
  • UOPS_EXECUTED.THREAD: 12.51
  • RETIRE_SLOTS: 12.5
  • UOPS_MITE: 0.01
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 4.12
  • UOPS_PORT_1: 3.97
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 4.42
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.0

With loop_count=100 and unroll_count=20

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
     7:	4d 85 ff             	test   r15,r15
     a:	41 80 d1 00          	adc    r9b,0x0
     e:	4d 85 ff             	test   r15,r15
    11:	41 80 d2 00          	adc    r10b,0x0
    15:	4d 85 ff             	test   r15,r15
    18:	41 80 d3 00          	adc    r11b,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 8.1
  • Core cycles: 4.1
  • Reference cycles: 3.65
  • UOPS_EXECUTED.THREAD: 12.06
  • RETIRE_SLOTS: 12.05
  • UOPS_MITE: 0.12
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 4.0
  • UOPS_PORT_1: 3.98
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 4.08
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.04

With unroll_count=100 and no inner loop

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	41 80 d1 00          	adc    r9b,0x0
     8:	41 80 d2 00          	adc    r10b,0x0
     c:	41 80 d3 00          	adc    r11b,0x0
    10:	80 d3 00             	adc    bl,0x0
    13:	80 d1 00             	adc    cl,0x0
    16:	80 d2 00             	adc    dl,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 7.03
  • Reference cycles: 6.19
  • UOPS_EXECUTED.THREAD: 14.0
  • RETIRE_SLOTS: 14.0
  • UOPS_MITE: 14.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 4.53
  • UOPS_PORT_1: 4.8
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 4.69
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 7.0

With loop_count=1000 and unroll_count=1

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	41 80 d1 00          	adc    r9b,0x0
     8:	41 80 d2 00          	adc    r10b,0x0
     c:	41 80 d3 00          	adc    r11b,0x0
    10:	80 d3 00             	adc    bl,0x0
    13:	80 d1 00             	adc    cl,0x0
    16:	80 d2 00             	adc    dl,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 9.0
  • Core cycles: 7.05
  • Reference cycles: 6.27
  • UOPS_EXECUTED.THREAD: 15.0
  • RETIRE_SLOTS: 15.0
  • UOPS_MITE: 0.02
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 4.59
  • UOPS_PORT_1: 4.9
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 5.51
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.01

With loop_count=100 and unroll_count=10

• Code:

     0:	41 80 d0 00          	adc    r8b,0x0
     4:	41 80 d1 00          	adc    r9b,0x0
     8:	41 80 d2 00          	adc    r10b,0x0
     c:	41 80 d3 00          	adc    r11b,0x0
    10:	80 d3 00             	adc    bl,0x0
    13:	80 d1 00             	adc    cl,0x0
    16:	80 d2 00             	adc    dl,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.2
  • Core cycles: 7.07
  • Reference cycles: 6.3
  • UOPS_EXECUTED.THREAD: 14.1
  • RETIRE_SLOTS: 14.1
  • UOPS_MITE: 0.14
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 4.54
  • UOPS_PORT_1: 4.75
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 4.82
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.07

With additional dependency-breaking instructions

With unroll_count=100 and no inner loop

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
     7:	4d 85 ff             	test   r15,r15
     a:	41 80 d1 00          	adc    r9b,0x0
     e:	4d 85 ff             	test   r15,r15
    11:	41 80 d2 00          	adc    r10b,0x0
    15:	4d 85 ff             	test   r15,r15
    18:	41 80 d3 00          	adc    r11b,0x0
    1c:	4d 85 ff             	test   r15,r15
    1f:	80 d3 00             	adc    bl,0x0
    22:	4d 85 ff             	test   r15,r15
    25:	80 d1 00             	adc    cl,0x0
    28:	4d 85 ff             	test   r15,r15
    2b:	80 d2 00             	adc    dl,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 14.0
  • Core cycles: 7.0
  • Reference cycles: 6.13
  • UOPS_EXECUTED.THREAD: 21.0
  • RETIRE_SLOTS: 21.0
  • UOPS_MITE: 21.0
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 6.99
  • UOPS_PORT_1: 7.01
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 7.0
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 7.0

With loop_count=1000 and unroll_count=1

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
     7:	4d 85 ff             	test   r15,r15
     a:	41 80 d1 00          	adc    r9b,0x0
     e:	4d 85 ff             	test   r15,r15
    11:	41 80 d2 00          	adc    r10b,0x0
    15:	4d 85 ff             	test   r15,r15
    18:	41 80 d3 00          	adc    r11b,0x0
    1c:	4d 85 ff             	test   r15,r15
    1f:	80 d3 00             	adc    bl,0x0
    22:	4d 85 ff             	test   r15,r15
    25:	80 d1 00             	adc    cl,0x0
    28:	4d 85 ff             	test   r15,r15
    2b:	80 d2 00             	adc    dl,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 16.0
  • Core cycles: 7.58
  • Reference cycles: 6.75
  • UOPS_EXECUTED.THREAD: 22.02
  • RETIRE_SLOTS: 22.0
  • UOPS_MITE: 0.07
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 7.17
  • UOPS_PORT_1: 7.28
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 7.56
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.03

With loop_count=100 and unroll_count=10

• Code:

     0:	4d 85 ff             	test   r15,r15
     3:	41 80 d0 00          	adc    r8b,0x0
     7:	4d 85 ff             	test   r15,r15
     a:	41 80 d1 00          	adc    r9b,0x0
     e:	4d 85 ff             	test   r15,r15
    11:	41 80 d2 00          	adc    r10b,0x0
    15:	4d 85 ff             	test   r15,r15
    18:	41 80 d3 00          	adc    r11b,0x0
    1c:	4d 85 ff             	test   r15,r15
    1f:	80 d3 00             	adc    bl,0x0
    22:	4d 85 ff             	test   r15,r15
    25:	80 d1 00             	adc    cl,0x0
    28:	4d 85 ff             	test   r15,r15
    2b:	80 d2 00             	adc    dl,0x0
  

• Show nanoBench command
• Results:
  • Instructions retired: 14.2
  • Core cycles: 7.14
  • Reference cycles: 6.37
  • UOPS_EXECUTED.THREAD: 21.12
  • RETIRE_SLOTS: 21.1
  • UOPS_MITE: 0.22
  • UOPS_MS: 0.0
  • UOPS_PORT_0: 6.97
  • UOPS_PORT_1: 7.02
  • UOPS_PORT_2: 0.0
  • UOPS_PORT_3: 0.0
  • UOPS_PORT_4: 0.0
  • UOPS_PORT_5: 7.13
  • DIV_CYCLES: 0.0
  • ILD_STALL.LCP: 0.0
  • UOPS_MITE>=1: 0.07