Software Tuning, Performance Optimization & Platform Monitoring
Discussion regarding monitoring and software tuning methodologies, Performance Monitoring Unit (PMU) of Intel microprocessors, and platform updating.
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The RDTSC instruction are abnormally SLOW on some intel platform

harmonyofthenight
Beginner
‎02-28-2025 08:17 AM
215 Views

test environment

 

Intel Platform:

Intel Core I5 12400F

newest microcode (0x12B)

win10 22H2 19045.5487

 

Amd Platform

AMD Ryzen 5800H

win10 22H2

 

TEST CASE:

harmonyofthenight_0-1740759299011.png

assembly of the key code (__builtin_ia32_rdtsc)

harmonyofthenight_1-1740759339130.png

 

TEST RESULT

AMD（163ms）

harmonyofthenight_3-1740759410937.png

 

Intel（5321ms，much slower than AMD）

harmonyofthenight_2-1740759374764.png

 

Intel Vtune Profiler result on the intel platform 

 
 

4af58c162d1664759070bd178a7c758e.png

 

 

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