RDTSC

Operands

• Operand 1 (w, suppressed): Register (EAX)
• Operand 2 (w, suppressed): Register (EDX)
• Operand 3 (r, suppressed): Register (TSC)

Available performance data

• Alder Lake-P
• Alder Lake-E
• Rocket Lake
• Tiger Lake
• Ice Lake
• Cascade Lake
• Cannon Lake
• Skylake-X
• Coffee Lake
• Kaby Lake
• Skylake
• Broadwell
• Haswell
• Ivy Bridge
• Sandy Bridge
• Westmere
• Nehalem
• Wolfdale
• Conroe
• Tremont
• Goldmont Plus
• Goldmont
• Airmont
• Bonnell
• AMD Zen 4
• AMD Zen 3
• AMD Zen 2
• AMD Zen+

Alder Lake-P

• Measurements
• Throughput
  • Computed from the port usage: 3.00
  • Measured (loop): 26.00
  • Measured (unrolled): 26.00
• Number of μops
  • Executed: 15
  • Retire slots: 18
  • Decoded (MITE): 2
  • Microcode Sequencer (MS): 16
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 5*p0156B+6*p06+3*p1+1*p5

Alder Lake-E

• Measurements
• Throughput
  • Measured (loop): 28.00
  • Measured (unrolled): 28.00
• Number of μops
  • Executed: 15
  • Microcode Sequencer (MS): 14
  • Requires the complex decoder

Rocket Lake

• Measurements
• Throughput
  • Computed from the port usage: 3.75
  • Measured (loop): 27.00
  • Measured (unrolled): 27.00
• Number of μops
  • Executed: 15
  • Retire slots: 18
  • Decoded (MITE): 2
  • Microcode Sequencer (MS): 16
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 3*p015+2*p0156+6*p06+3*p1+1*p5

Tiger Lake

• Measurements
• Throughput
  • Computed from the port usage: 3.75
  • Measured (loop): 27.00
  • Measured (unrolled): 27.00
• Number of μops
  • Executed: 15
  • Retire slots: 18
  • Decoded (MITE): 2
  • Microcode Sequencer (MS): 16
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 3*p015+2*p0156+6*p06+3*p1+1*p5

Ice Lake

• Measurements
• Throughput
  • Computed from the port usage: 3.75
  • Measured (loop): 27.00
  • Measured (unrolled): 27.00
• Number of μops
  • Executed: 15
  • Retire slots: 18
  • Decoded (MITE): 2
  • Microcode Sequencer (MS): 16
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 3*p015+2*p0156+6*p06+3*p1+1*p5

Cascade Lake

• Measurements
• Throughput
  • Computed from the port usage: 4.50
  • Measured (loop): 25.00
  • Measured (unrolled): 25.00
• Number of μops
  • Executed: 18
  • Retire slots: 18
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 18
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 1*p015+5*p0156+7*p06+3*p1+1*p15+1*p5

Cannon Lake

• Measurements
• Throughput
  • Computed from the port usage: 3.50
  • Measured (loop): 25.00
  • Measured (unrolled): 25.00
• Number of μops
  • Executed: 14
  • Retire slots: 16
  • Decoded (MITE): 4
  • Microcode Sequencer (MS): 12
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 6*p0156+3*p06+3*p1+1*p15+1*p5

Skylake-X

• Measurements
• Throughput
  • Computed from the port usage: 4.50
  • Measured (loop): 25.00
  • Measured (unrolled): 25.00
• Number of μops
  • Executed: 18
  • Retire slots: 18
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 18
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 3*p015+4*p0156+7*p06+3*p1+1*p5
• IACA 2.3
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 2.00
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5
• IACA 3.0
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 1.92
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5

Coffee Lake

• Measurements
• Throughput
  • Computed from the port usage: 4.50
  • Measured (loop): 25.00
  • Measured (unrolled): 25.00
• Number of μops
  • Executed: 18
  • Retire slots: 18
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 18
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 2*p015+4*p0156+7*p06+3*p1+1*p15+1*p5

Kaby Lake

• Measurements
• Throughput
  • Computed from the port usage: 4.50
  • Measured (loop): 25.00
  • Measured (unrolled): 25.00
• Number of μops
  • Executed: 18
  • Retire slots: 18
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 18
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 2*p015+4*p0156+7*p06+3*p1+1*p15+1*p5

Skylake

• Measurements
• Throughput
  • Computed from the port usage: 4.50
  • Measured (loop): 25.00
  • Measured (unrolled): 25.00
• Number of μops
  • Executed: 18
  • Retire slots: 18
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 18
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 2*p015+4*p0156+7*p06+3*p1+1*p15+1*p5
• IACA 2.3
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 2.00
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5
• IACA 3.0
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 1.92
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5

Broadwell

• Measurements
• Throughput
  • Computed from the port usage: 3.25
  • Measured (loop): 24.00
  • Measured (unrolled): 24.00
• Number of μops
  • Executed: 13
  • Retire slots: 13
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 13
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 4*p0156+6*p06+2*p1+1*p5
• IACA 2.2
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 2.00 (with the -no_interiteration flag: 2.00)
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5
• IACA 2.3
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 2.00
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5
• IACA 3.0
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 1.92
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5

Haswell

• Measurements
• Throughput
  • Computed from the port usage: 3.25
  • Measured (loop): 24.00
  • Measured (unrolled): 24.00
• Number of μops
  • Executed: 13
  • Retire slots: 13
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 13
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 1*p015+3*p0156+6*p06+2*p1+1*p5
• IACA 2.2
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 2.00 (with the -no_interiteration flag: 2.00)
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5
• IACA 2.3
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 2.00
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5
• IACA 3.0
• Throughput
  • Computed from the port usage: 2.00
  • IACA: 1.92
• Number of μops: 8
• Port usage: 5*p0156+2*p06+1*p5

Ivy Bridge

• Measurements
• Throughput
  • Computed from the port usage: 7.00
  • Measured (loop): 27.00
  • Measured (unrolled): 27.00
• Number of μops
  • Executed: 21
  • Retire slots: 21
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 21
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 10*p015+1*p05+3*p1+1*p15+6*p5

Sandy Bridge

• Measurements
• Throughput
  • Computed from the port usage: 7.00
  • Measured (loop): 28.00
  • Measured (unrolled): 28.00
• Number of μops
  • Executed: 21
  • Retire slots: 21
  • Decoded (MITE): 0
  • Microcode Sequencer (MS): 21
  • Requires the complex decoder (no other instruction can be decoded with simple decoders in the same cycle)
• Port usage: 10*p015+1*p05+3*p1+1*p15+6*p5

Westmere

• Measurements
• Throughput
  • Computed from the port usage: 7.00
  • Measured (loop): 24.00
  • Measured (unrolled): 24.00
• Number of μops
  • Executed: 21
  • Retire slots: 21
  • Microcode Sequencer (MS): 51
  • Requires the complex decoder
• Port usage: 1*p0+12*p015+3*p05+3*p1+2*p5

Nehalem

• Measurements
• Throughput
  • Computed from the port usage: 7.33
  • Measured (loop): 24.00
  • Measured (unrolled): 24.00
• Number of μops
  • Executed: 22
  • Retire slots: 22
  • Microcode Sequencer (MS): 56
  • Requires the complex decoder
• Port usage: 1*p0+13*p015+3*p05+3*p1+2*p5

Wolfdale

• Measurements
• Throughput
  • Computed from the port usage: 7.00
  • Measured (loop): 32.00
  • Measured (unrolled): 32.00
• Number of μops
  • Executed: 13
• Port usage: 3*p0+1*p015+2*p1+7*p5

Conroe

• Measurements
• Throughput
  • Computed from the port usage: 12.00
  • Measured (loop): 64.00
  • Measured (unrolled): 64.00
• Number of μops
  • Executed: 28
• Port usage: 6*p0+4*p015+2*p05+4*p1+12*p5

Tremont

• Measurements
• Throughput
  • Measured (loop): 23.00
  • Measured (unrolled): 23.00
• Number of μops
  • Executed: 20
  • Microcode Sequencer (MS): 20
  • Requires the complex decoder

Goldmont Plus

• Measurements
• Throughput
  • Measured (loop): 20.00
  • Measured (unrolled): 20.00
• Number of μops
  • Executed: 19
  • Microcode Sequencer (MS): 19
  • Requires the complex decoder

Goldmont

• Measurements
• Throughput
  • Measured (loop): 20.00
  • Measured (unrolled): 20.00
• Number of μops
  • Executed: 17
  • Microcode Sequencer (MS): 17
  • Requires the complex decoder

Airmont

• Measurements
• Throughput
  • Measured (loop): 34.00
  • Measured (unrolled): 34.00
• Number of μops
  • Executed: 11
  • Microcode Sequencer (MS): 11
  • Requires the complex decoder

Bonnell

• Measurements
• Throughput
  • Measured (loop): 29.02
  • Measured (unrolled): 29.00
• Number of μops
  • Executed: 16
  • Microcode Sequencer (MS): 16
  • Requires the complex decoder

AMD Zen 4

• Measurements
• Throughput
  • Measured (loop): 35.00
  • Measured (unrolled): 35.00
• Number of μops
  • Executed: 46

AMD Zen 3

• Measurements
• Throughput
  • Measured (loop): 36.00
  • Measured (unrolled): 36.05
• Number of μops
  • Executed: 44
• Documentation
• Number of μops: ucode

AMD Zen 2

• Measurements
• Throughput
  • Measured (loop): 37.47
  • Measured (unrolled): 37.45
• Number of μops
  • Executed: 37
• Documentation
• Number of μops: ucode

AMD Zen+

• Measurements
• Throughput
  • Measured (loop): 36.84
  • Measured (unrolled): 36.90
• Number of μops
  • Executed: 37
• Documentation
• Number of μops: ucode